List of the Cenozoic life of Maryland

This list of the Cenozoic life of Maryland contains the various prehistoric life-forms whose fossilized remains have been reported from within the US state of Maryland and are between 66 million and 10,000 years of age.

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Contents

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• G
• H
• I
• J
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• † Abra – tentative report
  • † Abra longicalla
• Acanthodesia
  • † Acanthodesia oblongula
  • † Acanthodesia savartii
• † Acantodesia
  • † Acantodesia oblongula

• 

  Illustration of a living Acipenser sturgeon

  Acipenser
• † Acrocoelum
  • † Acrocoelum richardsi – type locality for species
• Acropora
  • † Acropora palmata
• Acteocina
  • † Acteocina canaliculata
• Acteon
  • † Acteon danicus – type locality for species
  • † Acteon ovoides
• † Adocus
• † Aepycamelus – tentative report
• Aetobatus
  • † Aetobatus arcuatus
  • † Aetobatus irregularis
  • † Aetobatus profundus – type locality for species

• 

  Fossilized skull of the Miocene baleen whale Aglaocetus

  † Aglaocetus
  • † Aglaocetus patulus
• Alca
  • † Alca torda – or unidentified comparable form
• Aligena
  • † Aligena aequata
  • † Aligena elevata
• † Ambystoma
  • † Ambystoma maculatum
  • † Ambystoma tigrinum
• Amia

• 

  Life restoration of the Miocene-Pliocene beardog Amphicyon

  † Amphicyon
• Amyda
  • † Amyda cellulosa
• Anachis
  • † Anachis avara
• Anadara
  • † Anadara andrewsi
  • † Anadara ovalis
  • † Anadara subrostrata
  • † Anadara transversa
• Anas
  • † Anas crecca
• Ancilla – report made of unidentified related form or using admittedly obsolete nomenclature
• Angulus
  • † Angulus agilis
• Anomia
  • † Anomia aculeata
  • † Anomia marylandica
  • † Anomia multilineata
  • † Anomia simplex
• Anticlimax – tentative report
  • † Anticlimax gardnerae – type locality for species
• † Aphelops – tentative report
• † Aporrhaid
  • † Aporrhaid gastropod
• Aporrhais
  • † Aporrhais potomacensis
• Aquila
  • † Aquila chrysaetos
• † Araeodelphis – type locality for genus
  • † Araeodelphis natator – type locality for species
• † Araloselachus
  • † Araloselachus cuspidata
• Arca
  • † Arca callipleura
  • † Arca improcera
• † Archaeohippus
• Architectonica
  • † Architectonica form A informal
  • † Architectonica form B informal

• 

  Restoration of an Arctodus , or short-faced bear, with a human to scale

  † Arctodus
  • † Arctodus pristinus
• Argopecten
  • † Argopecten irradians
• † Armatobalanus
  • † Armatobalanus calvertensis
• Arossia
  • † Arossia bohaska – type locality for species
  • † Arossia cummembrana – type locality for species
  • † Arossia newmani
• † Asaphis
  • † Asaphis centenaria
• † Aspideretoides
  • † Aspideretoides virginianus

• 

  Shell of a modern Astarte bivalve

  Astarte
  • † Astarte cuneiformis
  • † Astarte exaltata
  • † Astarte marylandica
  • † Astarte obruta
  • † Astarte perplana
  • † Astarte thisphila
  • † Astarte thomasi
  • † Astarte undata
• Asterias
  • † Asterias forbesi – or unidentified comparable form
• Astrangia
  • † Astrangia danae
• † Astrehelia
  • † Astrehelia palmata
• † Astrhelia
  • † Astrhelia plamata
• † Astroscopus

  • 

    Life restoration of the Miocene stargazer Astroscopus countermani

    † Astroscopus countermani – type locality for species
• Astyris
  • † Astyris communis
  • † Astyris lunata
• Ataphrus
  • † Ataphrus glandula
• Athleta
  • † Athleta limopsis
  • † Athleta tuomeyi
• † Atopomys
  • † Atopomys texensis
• Atrina
  • † Atrina harrisi
  • † Atrina harrisii

• 

  Life restoration of the Miocene sperm whale Aulophyseter

  † Aulophyseter
  • † Aulophyseter mediatlanticus – type locality for species

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Contents

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• D
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• F
• G
• H
• I
• J
• K
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• M
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• 

  Portrait of a living Balaenoptera baleen whale

  Balaenoptera
  • † Balaenoptera cephalus
  • † Balaenoptera pusilla – type locality for species
• Balanus
  • † Balanus concabvus
  • † Balanus concava
  • † Balanus crenatus
  • † Balanus imitator
  • † Balanus vulcanellus – type locality for species
• Bankia
  • † Bankia gouldi
• Barnea
  • † Barnea costata
• Bathytormus
  • † Bathytormus alaeformis
• † Batiacasphaera
  • † Batiacasphaera sphaerica
• † Belosphys
• Bicorbula
  • † Bicorbula idonea
• Blarina

  • 

    A living Blarina brevicauda , or northern short-tailed shrew

    † Blarina brevicauda
  • † Blarina carolinensis
• † Bolis – or unidentified comparable form
• Bonasa
  • † Bonasa umbellus
• Boreotrophon
  • † Boreotrophon harasewychi – type locality for species
• Brachidontes
  • † Brachidontes potomacensis
• † Brachyprotoma
  • † Brachyprotoma obtusata
• † Brevirostrodelphis
  • † Brevirostrodelphis dividum – type locality for species
• † Brevoortia

  • 

    A living Brevoortia tyrannus , or Atlantic menhaden

    † Brevoortia tyrannus – or unidentified comparable form
• Buccinofusus
  • † Buccinofusus chesapeakensis
  • † Buccinofusus parilis
• Bufo
  • † Bufo americanus
  • † Bufo woodhousei
• † Bulliopsis
  • † Bulliopsis marylandica
  • † Bulliopsis quadrata
• Busycon – type locality for genus
  • † Busycon carica
  • † Busycon fusiforme
  • † Busycon fusiformis
• † Busycotyphus
  • † Busycotyphus coronatum
  • † Busycotyphus rugosum
• Busycotypus
  • † Busycotypus alveatum
  • † Busycotypus asheri – type locality for species
  • † Busycotypus canaliculatus
  • † Busycotypus coronatum
  • † Busycotypus rugosum

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Contents

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• D
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• F
• G
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• I
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• Cadulus
  • † Cadulus bellulus
  • † Cadulus newtonensis
  • † Cadulus thallus
• Caecum
  • † Caecum patuxentium
• † Calianassa
  • † Calianassa atlantica
  • † Calianassa matsoni – or unidentified comparable form
• Callinectes
  • † Callinectes ornatus

  • 

    A living Callinectes sapidus , or Chesapeake blue crab

    † Callinectes sapidus
• Calliostoma
  • † Calliostoma alphelium
  • † Calliostoma aphelium
  • † Calliostoma humile – or unidentified comparable form
  • † Calliostoma philanthropus
  • † Calliostoma philathropus
• Callista
  • † Callista marylandica
• Callocardia
  • † Callocardia catharia

• 

  A living Calonectris shearwater

  Calonectris
• Calyptraea
  • † Calyptraea aldrichi – type locality for species
  • † Calyptraea centralis
• † Calyptraphorus
  • † Calyptraphorus jacksoni
• Cancellaria
  • † Cancellaria alternata
• Cancer
  • † Cancer irroratus
• Canis

  • 

    Illustration in multiple views of a fossilized skull of the Pleistocene Canis armbrusteri , or Armbruster's wolf

    † Canis armbrusteri – type locality for species
  • † Canis latrans
  • † Canis rufus – or unidentified comparable form
• Cantharus
  • † Cantharus marylandicus
• † Carassatellites
  • † Carassatellites turgidulus
• Carcharhinus
  • † Carcharhinus egertoni
• Carcharias
  • † Carcharias collata – type locality for species
• Carcharodon
  • † Carcharodon auriculatus

  • 

    Fossilized tooth of the Miocene-Pliocene shark Cosmopolitodus hastalis , or broad-toothed mako

    † Carcharodon hastalis
• Cardita
  • † Cardita protracta
• † Caricella
• Carphophis
  • † Carphophis amoenus
• Caryocorbula
  • † Caryocorbula cuneata
  • † Caryocorbula inaqualis
• Cassis
• Castor
  • † Castor canadensis
• Catapleura
  • † Catapleura repanda – type locality for species
• † Cephalotropis – type locality for genus
  • † Cephalotropis coronatus – type locality for species
• Cerastoderma
  • † Cerastoderma leptopleurum
• Cervus
• † Cetophis – type locality for genus
  • † Cetophis heteroclitus – type locality for species
• Cetorhinus

• 

  Life restoration of the Miocene-Pliocene whale Cetotherium

  † Cetotherium
  • † Cetotherium megalophysum
  • † Cetotherium parvum – type locality for species
• Chama
  • † Chama corticosa
• Chelone
• Chelydra
  • † Chelydra serpentina
• † Chesacardium
  • † Chesacardium craticuloides
  • † Chesacardium laqueatum
• † Chesaclava – type locality for genus
  • † Chesaclava dissimilis
  • † Chesaclava quarlesi – type locality for species
• † Chesaconavus
  • † Chesaconavus chesapeakensis
  • † Chesaconavus rossi
• † Chesaconcavus
  • † Chesaconcavus chesapeakensis
  • † Chesaconcavus myosulcatus
  • † Chesaconcavus proteus
  • † Chesaconcavus rossi
  • † Chesaconcavus santamaria
• † Chesapecten
  • † Chesapecten coccymelus
  • † Chesapecten coccymeus
  • † Chesapecten covepointensis

  • 

    Shells of the Pliocene scallop Chesapecten jeffersonius

    † Chesapecten jeffersonius
  • † Chesapecten madisonius
  • † Chesapecten monicae
  • † Chesapecten nefrens
  • † Chesapecten santamaria
• † Chesasyrinx – type locality for genus
  • † Chesasyrinx rotifera
• † Chesatrophon – type locality for genus
  • † Chesatrophon chesapeakeanus – type locality for species
• Chlamys
  • † Chlamys choctavensis
  • † Chlamys sheldonae
• † Chloridella
  • † Chloridella empusa
• Chrysemys

  • 

    A living Chrysemys picta , or painted turtle

    † Chrysemys picta
• † Cimomia
  • † Cimomia marylandensis – type locality for species
• Circulus – report made of unidentified related form or using admittedly obsolete nomenclature
  • † Circulus form A informal
• Cirsotrema
  • † Cirsotrema form A informal
  • † Cirsotrema from B informal
• Clavus
• † Cleistophaeridium
  • † Cleistophaeridium placacanthum
• Clementia
  • † Clementia inoceriformis
• Clethrionomys
  • † Clethrionomys gapperi – or unidentified comparable form
• Cliona
  • † Cliona sulphurea
• † Clionia
  • † Clionia sulphurea
• Coluber
  • † Coluber constrictor

• 

  Fossil of the Miocene-Pleistocene barnacle Concavus

  Concavus
  • † Concavus concavus
  • † Concavus crassostricola
• Condylura
  • † Condylura cristata
• Conopeum
  • † Conopeum germanum
• Conus
  • † Conus deluvianus
  • † Conus diluvianus
  • † Conus sanctaemariae – type locality for species
• Coralliophaga
  • † Coralliophaga bryani

• 

  Shell of a Corbula basket clam

  Corbula
  • † Corbula elevata
  • † Corbula inaequalis
  • † Corbula pectorosa – type locality for species
• † Coronia
• Crassatella
  • † Crassatella aquiana
  • † Crassatella marylandica
  • † Crassatella melinus
• Crassostrea
  • † Crassostrea virginica
• Crenilabium – or unidentified comparable form
  • † Crenilabium elatum
• † Creonella
  • † Creonella obscuriplica – type locality for species
• Crepidula
  • † Crepidula fornicata
  • † Crepidula plana

• 

  Fossil of the Early Cretaceous-Eocene shark Cretolamna

  † Cretolamna
  • † Cretolamna appendiculata
• Crotalus
  • † Crotalus horridus
• Crucibulum
  • † Crucibulum constrictum
  • † Crucibulum costata
  • † Crucibulum multilineatum

• 

  A living Cryptobranchus alleganiensis , or hellbender salamander

  Cryptobranchus
  • † Cryptobranchus guildayi – type locality for species
• Cucullaea
  • † Cucullaea gigantea
  • † Cucullaea transversa
• Cumingia
  • † Cumingia tellinoides
• † Cybium
• Cyclocardia
  • † Cyclocardia granulata
• † Cyclopsiella
  • † Cyclopsiella lusatica
• Cyclostremiscus
  • † Cyclostremiscus sohli – type locality for species
• Cylichna
  • † Cylichna venusta – type locality for species
• Cymatosyrinx
  • † Cymatosyrinx mariana – type locality for species
• † Cynarctus
  • † Cynarctus marylandica – type locality for species
  • † Cynarctus wangi – type locality for species
• † Cynorca – tentative report
• Cypraea
• Cyrtopleura

  • 

    Shell in multiple views of a Cyrtopleura costata , or angel wing clam

    † Cyrtopleura costata
• Cythara
• † Cythereis
  • † Cythereis tuberculata
• Cytheridea
  • † Cytheridea punctillata
• † Cytheris
  • † Cytheris tuberculata

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Contents

• A
• B
• C
• D
• E
• F
• G
• H
• I
• J
• K
• L
• M
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• † Dallarca
  • † Dallarca elevata
  • † Dallarca elnia
  • † Dallarca idonea
  • † Dallarca staminea
  • † Dallarca subrostrata

• 

  A living Dasyatis stingray

  Dasyatis
  • † Dasyatis centrourus – or unidentified comparable form
• † Delphinodon
  • † Delphinodon leidyi
• Dentalium
  • † Dentalium attenuatum
• † Desmathyus
• Diadophis
  • † Diadophis punctatus
• Diodora
  • † Diodora griscomi
  • † Diodora marlboroensis
  • † Diodora marylandica
  • † Diodora marylandicus
  • † Diodora nassula
  • † Diodora redimicula

• 

  Underside of the reconstructed cranium of the Miocene baleen whale Diorocetus

  † Diorocetus – type locality for genus
  • † Diorocetus hiatus – type locality for species
• Diplodonta
  • † Diplodonta marlboroensis
  • † Diplodonta subvexa
• † Dipoides
• Discinisca
  • † Discinisca lugubris
  • † Discinisca lugubrius
• Divalinga
  • † Divalinga quadrisulcata
• † Dolicholatirus

• 

  Fossil shell of the Cretaceous-modern marine venus clam Dosinia

  Dosinia
  • † Dosinia acetabulum
• † Dosiniopsis
  • † Dosiniopsis lenticularis

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Contents

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• C
• D
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• F
• G
• H
• I
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• † Eburneopecten
  • † Eburneopecten cerinus – type locality for species
  • † Eburneopecten dalli
• Echinocardium
  • † Echinocardium marylandiense – type locality for species
• Echinophoria – type locality for genus
  • † Echinophoria caelatura
• † Ecphora
  • † Ecphora chesapeakensis – type locality for species

  • 

    Illustration of a fossilized shell of the Miocene murex sea snail Ecphora gardnerae

    † Ecphora gardnerae
  • † Ecphora meganae
  • † Ecphora quadricostata
  • † Ecphora scientistensis
  • † Ecphora tampaensis
  • † Ecphora tricostata
  • † Ecphora turneri
• † Ectoganus
  • † Ectoganus gliriformis – or unidentified comparable form
• † Ectopistes
  • † Ectopistes migratorius
• Elaphe
  • † Elaphe vulpina
• Electra
  • † Electra monostachys
• Elphidium
  • † Elphidium discoidale
  • † Elphidium incertum
  • † Elphidium latispatium
• Ensis
  • † Ensis directus
  • † Ensis ensiformis
• † Entobia
• Entosolenia
  • † Entosolenia globosa
  • † Entosolenia lucida
• Eontia
  • † Eontia palmerae
  • † Eontia ponderosa
• † Eopleurotoma – or unidentified comparable form
  • † Eopleurotoma harrisi
  • † Eopleurotoma potomacensis

• 

  Fossilized cranium in multiple views of the Paleocene-Eocene gavial relative Eosuchus

  † Eosuchus
  • † Eosuchus minor
• † Eosurcula – or unidentified comparable form
  • † Eosurcula ducateli
• Epitonium
  • † Epitonium angulatum
  • † Epitonium chancellorensis – type locality for species
  • † Epitonium denticulatum
  • † Epitonium humphreysii
  • † Epitonium multistriatum
  • † Epitonium rupicola
  • † Epitonium sayanum
• Eponides
  • † Eponides frigida
• Eptesicus
  • † Eptesicus fuscus – or unidentified comparable form
• Equus
  • † Equus complicatus
  • † Equus giganteus
• Erethizon
  • † Erethizon dorsatum

• 

  Life restoration of the Pleistocene bovid Euceratherium , or the shrub ox. Robert Bruce Horsfall (1913).

  † Euceratherium
  • † Euceratherium collinum
• † Euclastes – tentative report
• Eucrassatella
  • † Eucrassatella melinus
• Eulima
  • † Eulima brightseatensis – type locality for species
  • † Eulima form A informal
• Eumeces
  • † Eumeces fasciatus – or unidentified comparable form
• Eupleura
  • † Eupleura caudata

• 

  Life restoration of the Miocene whale Eurhinodelphis (above)

  † Eurhinodelphis
  • † Eurhinodelphis longirostris
• Euspira
  • † Euspira heros
  • † Euspira marylandica
  • † Euspira tuomeyi

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Contents

• A
• B
• C
• D
• E
• F
• G
• H
• I
• J
• K
• L
• M
• N
• O
• P
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• Felis
  • † Felis couguar
• † Ficopsis
• Fissurella
  • † Fissurella fluviamariana – type locality for species

• 

  Living Fistulobalanus barnacles

  † Fistulobalanus
  • † Fistulobalanus klemmi
• † Florilus
  • † Florilus chesapeakensis
• † Florimetis
  • † Florimetis biplicata
• † Fulgar
  • † Fulgar coronatum

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Contents

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• I
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• 

  A living Galeocerdo cuvier , or tiger shark

  Galeocerdo
  • † Galeocerdo aduncus
  • † Galeocerdo appendiculatus
  • † Galeocerdo contortus
  • † Galeocerdo latidens
• Galeodea
• Gari
  • † Gari gubernatoria
• Gastrochaena
• Gavia
  • † Gavia immer

• 

  Fossilized skull of the Miocene crocodile relative Gavialosuchus

  † Gavialosuchus
  • † Gavialosuchus antiquus
• Gegania
  • † Gegania marylandica
• Gemma
  • † Gemma gemma
• Genota – or unidentified comparable form
  • † Genota bellistriata
• Geukensia
  • † Geukensia demissa
• Gibbula – tentative report
  • † Gibbula glandula
• † Gilbertina
  • † Gilbertina texana

• 

  A living Glaucomys , or New World flying squirrel

  Glaucomys
• Globigerina
  • † Globigerina praebulloides
• Globigerinoides
  • † Globigerinoides altiaperturus
  • † Globigerinoides sicanus
• † Globoquadrina
  • † Globoquadrina altispira
• Glossus
  • † Glossus fraterna
  • † Glossus ignolea – or unidentified comparable form
  • † Glossus markoei
  • † Glossus markoii
  • † Glossus marylandica
  • † Glossus mazlea
  • † Glossus santamaria
• Glycimeris
  • † Glycimeris parilis
• Glycymeris
  • † Glycymeris americana
  • † Glycymeris idonea
  • † Glycymeris lentiformis
  • † Glycymeris parilis
• Glyptemys
  • † Glyptemys muhlenbergii

• 

  Mounted fossilized skeleton of the Miocene-Pleistocene elephant relative Gomphotherium

  † Gomphotherium
  • † Gomphotherium obscurum – type locality for species
• † Gryphaeostrea
  • † Gryphaeostrea vomer
• Gulo
  • † Gulo gulo
• Gyrinophilus
  • † Gyrinophilus porphyriticus – or unidentified comparable form

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Contents

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• I
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• † Habibacysta
  • † Habibacysta tectata
• † Hadrodelphis – type locality for genus
  • † Hadrodelphis calvertense – type locality for species
• † Halicetus – type locality for genus
  • † Halicetus ignotus – type locality for species
• Haminoea
  • † Haminoea solitaria

• 

  Shells in differing orientations of Hastula augur sea snails

  Hastula
  • † Hastula inornata
  • † Hastula simplex
• Haustator
  • † Haustator form A informal
  • † Haustator gnoma – type locality for species
  • † Haustator premortoni – type locality for species
• † Heliadornis – type locality for genus
  • † Heliadornis ashbyi – type locality for species
• Hemimactra
  • † Hemimactra solidissima
  • † Hemimactra subparilis
• Hemipristis

  • 

    Fossilized teeth of the Miocene weasel shark Hemipristis serra

    † Hemipristis serra
• † Hercoglossa
  • † Hercoglossa tuomeyi – type locality for species
• † Hesperhys
• Heterodon
  • † Heterodon platyrhinos – or unidentified comparable form
• Hiatella
  • † Hiatella arctica
  • † Hiatella artica
• Hippoporidra
  • † Hippoporidra edax

• 

  Mounted fossilized skeleton of the Miocene-Pliocene horse Hippotherium

  † Hippotherium
• Hyla
  • † Hyla crucifer
• Hyotissa
  • † Hyotissa haitensis
• Hysteroconcha
  • † Hysteroconcha marylandica
  • † Hysteroconcha staminaea
• † Hystrichosphaeropsis
  • † Hystrichosphaeropsis obscura

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Contents

• A
• B
• C
• D
• E
• F
• G
• H
• I
• J
• K
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• M
• N
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• X
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• Ictalurus
• Ilyanassa
  • † Ilyanassa obsoleta
  • † Ilyanassa trivittata
• Ischadium
  • † Ischadium recurvum

• 

  Fossilized skeleton of the Middle Jurassic-Miocene Chimaera relative Ischyodus

  † Ischyodus
  • † Ischyodus williamsae – type locality for species
• Isognomon
  • † Isognomon maxillata
  • † Isognomon tortum
• Isurus
• † Ixacanthus – type locality for genus
  • † Ixacanthus coelospondylus – type locality for species

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• † Judithemys
  • † Judithemys kranzi – type locality for species

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• Kalolophus
  • † Kalolophus antillarum
• † Kapalmerella
  • † Kapalmerella mortoni

• 

  Life restoration of the Oligocene-Miocene dolphin Kentriodon

  † Kentriodon – type locality for genus
  • † Kentriodon pernix – type locality for species
• † Kummelia
  • † Kummelia americana
• Kuphus – report made of unidentified related form or using admittedly obsolete nomenclature
• Kurtziella
  • † Kurtziella cerina

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• † Labyrinthodinium
  • † Labyrinthodinium truncatum
• † Lacinia
  • † Lacinia pygmaea – type locality for species
• Lacuna
  • † Lacuna feorra – type locality for species
• † Laevihastula – type locality for genus
  • † Laevihastula marylandica – type locality for species
  • † Laevihastula simplex
• † Lagodon

• 

  A modern Lamna mackerel shark

  Lamna
  • † Lamna denticulata
  • † Lamna obliqua
  • † Lamna vincenti
• Lampropeltis
  • † Lampropeltis triangulum
• Lasiopodomys
  • † Lasiopodomys deceitensis
• Lenticulina
  • † Lenticulina rotulata
• Lepisosteus
• † Leptomactra
  • † Leptomactra delumbis
  • † Leptomactra marylandica
• † Leptophoca – type locality for genus
  • † Leptophoca lenis – type locality for species
  • † Leptophoca proxima – or unidentified comparable form
• Lepus

  • 

    A living Lepus americanus , or snowshoe hare

    † Lepus americanus
• † Levifusus
  • † Levifusus trabeatus
• Libinia
  • † Libinia dubia
• † Lingulodinium
  • † Lingulodinium macherophorum
• Lirophora
  • † Lirophora alevata
  • † Lirophora alveata
  • † Lirophora latilirata
  • † Lirophora parkeria
• Lithophaga – or unidentified comparable form
  • † Lithophaga marylandica
• Littoraria
  • † Littoraria irrorata
• Lontra

  • 

    Pair of living Lontra canadensis , or North American river otter

    † Lontra canadensis
• † Lophocetus
  • † Lophocetus calvertensis – type locality for species
  • † Lophocetus pappus – type locality for species
• † Lophochelys – tentative report
• Lopholatilus
• Loxoconcha
  • † Loxoconcha impressa
• Lucina – report made of unidentified related form or using admittedly obsolete nomenclature
• Lucina
  • † Lucina dartoni
  • † Lucina whitei
• Lucinoma
  • † Lucinoma contracta
  • † Lucinoma filosa
• Lunatia
  • † Lunatia catenoides
• Lyonsia
  • † Lyonsia hyalina

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• Macoma

  • 

    Shell of a Limecola balthica , or Baltic clam

    † Macoma balthica
  • † Macoma calcarea
• Macrocallista
  • † Macrocallista marylandica
  • † Macrocallista subimpressa
• † Macrokentriodon – type locality for genus
  • † Macrokentriodon morani – type locality for species
• Mactrodesma
  • † Mactrodesma subponderosa
  • † Mactrodesma subponderosum
• † Mammut
  • † Mammut americanum
• † Mammuthus
  • † Mammuthus columbi

  • 

    Life restorations of a Mammut americanum , or American mastodon (right), and a Mammuthus primigenius , or wooly mammoth (left)

    † Mammuthus primigenius
• Marginella
  • † Marginella minuta
• † Mariacolpus – type locality for genus
  • † Mariacolpus plebeia
• † Mariadrillia – type locality for genus
  • † Mariadrillia parvoidea
• † Mariafusus – type locality for genus
  • † Mariafusus marylandica
• † Marianarona – type locality for genus
  • † Marianarona asheri – type locality for species
  • † Marianarona marylandica – type locality for species
• † Mariasalpinx – type locality for genus
  • † Mariasalpinx emilyae – type locality for species
• † Mariasveltia – type locality for genus
  • † Mariasveltia lunata
• † Mariaturricula – type locality for genus
  • † Mariaturricula biscatenaria
• Marmota

  • 

    A living Marmota monax , or groundhog

    † Marmota monax
• Martesia
  • † Martesia cuneiformis
  • † Martesia ovalis
• † Marvacrassatella
  • † Marvacrassatella marylandica
  • † Marvacrassatella melina
  • † Marvacrassatella turgidula
• Massilina
  • † Massilina marylandica
• Mathilda
  • † Mathilda crebricosta – type locality for species
  • † Mathilda form A informal
  • † Mathilda form B informal
  • † Mathilda form C informal
  • † Mathilda kauffmani – type locality for species
  • † Mathilda marylandensis – type locality for species
• † Medoriopsis
  • † Medoriopsis marylandica

• 

  Mounted fossilized skeleton of the Miocene-Pleistocene ground sloth Megalonyx

  † Megalonyx
• Megaptera
  • † Megaptera expansa – type locality for species
• Melampus
  • † Melampus bidentatus
• Melanitta
  • † Melanitta deglandi
• Meleagris
  • † Meleagris gallopavo
• † Melosia
  • † Melosia staminea
• Membranipora
  • † Membranipora flabellata
• Menestho
  • † Menestho form A informal
• Mephitis
  • † Mephitis mephitis
• Mercenaria
  • † Mercenaria blakei
  • † Mercenaria campechiensis
  • † Mercenaria cuneata – type locality for species
  • † Mercenaria ducatelli – tentative report

  • 

    Collection of Mercenaria mercenaria , also known as hard clams or quahogs

    † Mercenaria mercenaria
  • † Mercenaria plena
  • † Mercenaria staminea
  • † Mercenaria subcuneata
  • † Mercenaria tetrica
• Meretrix
  • † Meretrix subimpressa
• † Merychippus
• † Mesocetus
  • † Mesocetus siphunculus
• † Mesorhytis – tentative report
  • † Mesorhytis pomonkensis
  • † Mesorhytis potomacensis
• † Messapicetus
  • † Messapicetus longirostris

• 

  Mounted fossilized skeleton of the Miocene-Pleistocene manatee relative Metaxytherium

  † Metaxytherium
  • † Metaxytherium crataegense – type locality for species
• † Micropogon
  • † Micropogon undulatus
• Microtus
  • † Microtus chrotorrhinus – or unidentified comparable form
  • † Microtus guildayi
  • † Microtus involutus – or unidentified comparable form
  • † Microtus pennsylvanicus
• Mictomys
  • † Mictomys borealis
• Miltha
  • † Miltha aquiana
• † Miocepphus
  • † Miocepphus bohaskai – type locality for species
  • † Miocepphus mcclungi

• 

  Restoration of the Pliocene-Pleistocene Miracinonyx , or American cheetah

  † Miracinonyx
  • † Miracinonyx inexpectatus
• Mitra
  • † Mitra marylandica
• Modiolus
  • † Modiolus dalli
  • † Modiolus ducatelli
  • † Modiolus ducatellii
  • † Modiolus modiolus
  • † Modiolus potomacensis – type locality for species
• † Moira – tentative report
  • † Moira atropos
• † Monotherium
  • † Monotherium affine
• Morus
  • † Morus avitus – type locality for species
• Mulinia
  • † Mulinia lateralis
• Mustela

  • 

    A living Neovison vison , or American mink

    † Mustela vison – or unidentified comparable form
• † Mya
  • † Mya arenaria
• Myliobatis
  • † Myliobatis dixoni – type locality for species
  • † Myliobatis frangens – type locality for species
  • † Myliobatis fremenvillii – or unidentified comparable form
  • † Myliobatis gigas
  • † Myliobatis pachyodon
  • † Myliobatis vicomicanus

• 

  Fossilized skeleton of the Pliocene-Holocene peccary Mylohyus

  † Mylohyus
  • † Mylohyus fossilis – type locality for species
  • † Mylohyus obtusidens
• Myotis
  • † Myotis grisescens – or unidentified comparable form
• Myrtea – tentative report
  • † Myrtea astartiformis
  • † Myrtea uhleri
• Mysella
  • † Mysella planulata
• Mytilus
  • † Mytilus incurvus

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• † Nanosiren – tentative report
• Napaeozapus
  • † Napaeozapus insignis
• Narona
  • † Narona potomacensis
• Nassa

• 

  A living Nassarius , or nassa mud snail

  Nassarius
  • † Nassarius peralta
  • † Nassarius vibex
• Nemocardium
  • † Nemocardium lene
• Neofiber
• Neotoma – type locality for genus
  • † Neotoma floridana
  • † Neotoma spelaea – type locality for species
• Nerodia

  • 

    A living Nerodia sipedon , or northern water snake

    † Nerodia sipedon
• Neverita
  • † Neverita asheri – type locality for species
  • † Neverita cliftonensis
  • † Neverita discula – type locality for species
  • † Neverita duplicatus
  • † Neverita potomacensis – type locality for species
• † Nodisurculina – type locality for genus
  • † Nodisurculina engonata
• Noetia
  • † Noetia carolinensis
• Nonion
  • † Nonion calvertensis
  • † Nonion pompilioides
  • † Nonion sloanii
• Notidanus
  • † Notidanus primigeneus
  • † Notidanus primigenius
• Notophthalmus
  • † Notophthalmus viridescens – or unidentified comparable form
• Notorynchus

  • 

    Close-up portrait of a living Notorynchus cepedianus , or broadnose sevengill shark

    † Notorynchus cepedianus – type locality for species
• Novocrania
  • † Novocrania lububris
• Nucula
  • † Nucula potomacensis
  • † Nucula proxima
  • † Nucula prunicola
  • † Nucula taphria
• Nuculana
  • † Nuculana acuta
  • † Nuculana cliftonensis
  • † Nuculana cultelliformis
  • † Nuculana improcera
  • † Nuculana liciata
  • † Nuculana luciata
  • † Nuculana parilis
  • † Nuculana tysoni

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• Ochotona
  • † Ochotona princeps – or unidentified comparable form
• Odocoileus
  • † Odocoileus virginianus

• 

  A living Odontaspis sand shark

  Odontaspis
  • † Odontaspis actutissima
  • † Odontaspis acutissima
  • † Odontaspis hopei
  • † Odontaspis littoralis
  • † Odontaspis macrota
  • † Odontaspis verticalis
  • † Odontaspis winkleri
• † Odontopolys
• Odostomia
  • † Odostomia insignifica
• † Ogivalina
  • † Ogivalina parvula
• Ondatra
  • † Ondatra annectens
  • † Ondatra zibethicus
• † Operculodinium
  • † Operculodinium centrocarpum
  • † Operculodinium piaseckii
• Opheodrys
  • † Opheodrys vernalis
• Ophiura
  • † Ophiura marylandica

• 

  Life restoration of the Miocene sperm whale Orycterocetus

  † Orycterocetus
  • † Orycterocetus crocodilinus
• † Osteopygis
  • † Osteopygis roundsi
• Ostrea
  • † Ostrea alepidota
  • † Ostrea carolinensis
  • † Ostrea trachydiscus – type locality for species
• † Otodus
  • † Otodus angustidens – tentative report

  • 

    Diagram illustrating the largest (grey) and most conservative (red) size estimates of the Miocene-Pliocene shark Carcharocles megalodon (sometimes Carcharodon or Otodusmegalodon) with a whale shark (violet), great white shark (green), and anachronistic human (black) to scale

    † Otodus megalodon
• Otus
  • † Otus guildayi – type locality for species
• † Oxyrhina
  • † Oxyrhina cuspidata
  • † Oxyrhina desorii
  • † Oxyrhina elegans
  • † Oxyrhina retroflexa
  • † Oxyrhina sillimani

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• Pagurus
  • † Pagurus pollicaris
• † Palaeocarcharodon
  • † Palaeocarcharodon orientalis
• † Palaeocystodinium
  • † Palaeocystodinium golzowense

• 

  Restoration of the Cretaceous-Eocene sea snake Palaeophis

  † Palaeophis
  • † Palaeophis grandis
• † Pamicellaria
  • † Pamicellaria convoluta
• Pandora
  • † Pandora gouldiana
• Panopea
  • † Panopea americana
  • † Panopea elongata
  • † Panopea goldfussi
  • † Panopea goldfussii
  • † Panopea whitfieldi
• Panopeus
  • † Panopeus herbstii
• Panthera

  • 

    A living Panthera leo , or lion

    † Panthera leo
  • † Panthera onca
• Paraconcavus
  • † Paraconcavus rooseveltensis
• † Paramya
  • † Paramya subovata
• Parascalops
  • † Parascalops breweri
• † Parietobalaena – type locality for genus
  • † Parietobalaena palmeri – type locality for species
• Parvilucina
  • † Parvilucina crenulata
  • † Parvilucina multistriata
• † Pasitheola
  • † Pasitheola marylandensis – type locality for species
• Pecten
  • † Pecten humphreysii
  • † Pecten marylandica
• Pekania
  • † Pekania diluviana – type locality for species
• † Pelocetus – type locality for genus
  • † Pelocetus calvertensis – type locality for species
• † Pelodelphis – type locality for genus
  • † Pelodelphis gracilis – type locality for species
• † Pentadinium
  • † Pentadinium latincinctum – or unidentified comparable form
• Periploma – tentative report
• Perisoreus

  • 

    A living Perisoreus canadensis , or grey jay

    † Perisoreus canadensis
• Peromyscus
  • † Peromyscus cumberlandensis
  • † Peromyscus leucopus – or unidentified comparable form
• † Petauristodon
  • † Petauristodon alpinus – or unidentified comparable form
• Petricola
  • † Petricola calvertensis
  • † Petricola pholadiformis
• Phacoides
  • † Phacoides anodonata
  • † Phacoides contractus

• 

  Life restoration of the Paleocene-Eocene ungulate Phenacodus . Charles R. Knight (1898).

  † Phenacodus – tentative report
• † Phenacomya
  • † Phenacomya petrosa
• Phenacomys
• † Phocageneus
  • † Phocageneus venustus
• Pholadomya
  • † Pholadomya marylandica
• † Physeterula
• Physodon
  • † Physodon triqueter
• Pinna
• Pipistrellus

• 

  Shell of a Pitar venus clam

  Pitar
  • † Pitar morrhuanus
  • † Pitar ovatus
  • † Pitar pyga
  • † Pitar subnasuta
• Pitymys
  • † Pitymys cumberlandensis
• Placopecten
  • † Placopecten clintonius
  • † Placopecten marylandica
  • † Placopecten virginiana
• Platidia
  • † Platidia marylandica – type locality for species

• 

  Restoration of a herd of alarmed Miocene-Pleistocene peccaries of the genus Platygonus . Charles R. Knight (1922).

  † Platygonus
  • † Platygonus cumberlandensis
  • † Platygonus intermedius – type locality for species
  • † Platygonus tetragonus
  • † Platygonus vetus
• Plecotus
  • † Plecotus alleganiensis – type locality for species
• Plethodon
  • † Plethodon gultinosus
• Pleurotomella
  • † Pleurotomella bellistriata – type locality for species
• † Pliorhytis
  • † Pliorhytis centenaria
• Pogonias

  • 

    A living Pogonias cromis , or black drum

    † Pogonias cromis – or unidentified comparable form
• † Poliniciella – type locality for genus
  • † Poliniciella marylandica – type locality for species
• Polydora
• Polystira
  • † Polystira barretti
  • † Polystira communis
• Poromya
  • † Poromya subovata
• † Praeorbulina
  • † Praeorbulina glomerosa

• 

  Life restoration of the Paleocene-Eocene waterfowl Presbyornis

  † Presbyornis
  • † Presbyornis isoni – type locality for species
• † Prionodon
  • † Prionodon egertoni
• Prionotus
  • † Prionotus evolans – or unidentified related form
• † Priscodelphinus
  • † Priscodelphinus acutidens – type locality for species
  • † Priscodelphinus atropius – type locality for species
  • † Priscodelphinus conradi
  • † Priscodelphinus stenus – type locality for species
  • † Priscodelphinus uraeus
• † Priscoficus
  • † Priscoficus arguta
• Propebela
  • † Propebela marylandica – type locality for species
  • † Propebela parva
• Prophaethon – tentative report
• † Prosthennops
  • † Prosthennops niobrarensis
  • † Prosthennops xiphodonticus
• † Protocardia
  • † Protocardia virginiana
• Pseudacris

  • 

    A living Pseudacris triseriata , or western chorus frog

    † Pseudacris triseriata
• † Pseudoaptyxis
  • † Pseudoaptyxis sanctaemariae – type locality for species
• † Pseudocepphus – type locality for genus
  • † Pseudocepphus teres – type locality for species
• Pseudoliva
  • † Pseudoliva longicostata – type locality for species
  • † Pseudoliva tuberculifera
• Pseudomalaxis – or unidentified comparable form
  • † Pseudomalaxis ripleyana
• † Pseudophorus
  • † Pseudophorus calvertensis – type locality for species
• † Pseudotrition
  • † Pseudotrition ruber
• Pteria
• † Ptychosalpinx
  • † Ptychosalpinx altilis
  • † Ptychosalpinx multirugata
  • † Ptychosalpinx pustulosus – type locality for species

• 

  A living Puffinus shearwater

  Puffinus
  • † Puffinus conradi – type locality for species
• Pycnodonte
  • † Pycnodonte percrassa
• † Pyropsis – tentative report

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• 

  Shell of a Quinqueloculina foraminiferan

  Quinqueloculina
  • † Quinqueloculina flexuosa
  • † Quinqueloculina seminula

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• † Rana

  • 

    A living Lithobates clamitans (sometimes Rana clamitans), or green frog

    † Rana clamitans
  • † Rana pipiens
  • † Rana sylvatica
• Rangia
  • † Rangia cuneata
• Ranzania
• † Reticulatosphaera
  • † Reticulatosphaera actinocoronata
• Retusa
  • † Retusa conulus
  • † Retusa marylandica
  • † Retusa sylvaerupis
• † Rhabdosteus – type locality for genus
  • † Rhabdosteus latiradix – type locality for species
• Rhinoptera
• Rhynchobatus
  • † Rhynchobatus pristinus
• † Roccus

  • 

    A living Morone saxatilis (formerly Roccus saxatilis), or striped bass

    † Roccus saxatilis
• † Rotalia
  • † Rotalia beccardi
  • † Rotalia beccarii

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• Saccella
  • † Saccella parva
• Salamandra
  • † Salamandra opaca
• † Sangamona
  • † Sangamona fugitiva
• † Scala
  • † Scala marylandica

• 

  Fossilized teeth of the Neogene sperm whale Scaldicetus

  † Scaldicetus
• † Scapanorhynchus
  • † Scapanorhynchus subulatus – tentative report
• Scaphander
  • † Scaphander potomacensis – type locality for species
• Scaphella – type locality for genus
  • † Scaphella solitaria
  • † Scaphella virginiana
• Sceloporus
  • † Sceloporus undulatus – or unidentified comparable form

• 

  Fossilized skull of the Miocene toothed whale Schizodelphis

  † Schizodelphis
  • † Schizodelphis barnesi
  • † Schizodelphis sulcatus
• Schizoporella
  • † Schizoporella unicornis
• Sciaenops
  • † Sciaenops eastmani
• Sciuropterus
  • † Sciuropterus volans
• Sciurus
  • † Sciurus carolinensis
• † Scutella
  • † Scutella aberti
• † Sediliopsis – type locality for genus
  • † Sediliopsis gracilis
• Seila
  • † Seila adamsii
• Semele – tentative report
• Semele
  • † Semele carinata
  • † Semele subovata
• Serpulorbis
  • † Serpulorbis granifera
  • † Serpulorbis graniferus
• † Sigmesalia
  • † Sigmesalia palmerae – type locality for species
• Siphonalia
  • † Siphonalia devexus
  • † Siphonalia potomacensis – type locality for species
• † Siphonocetus
  • † Siphonocetus clarkianus
  • † Siphonocetus priscus

• 

  Life restoration of the Pleistocene-Holocene saber-tooth cat Smilodon

  † Smilodon
  • † Smilodon fatalis
• † Smilodontopis
  • † Smilodontopis mooreheadi
• Solariorbis
  • † Solariorbis form A informal
  • † Solariorbis laurelae – type locality for species
  • † Solariorbis lipara
• † Solarium
  • † Solarium trilineatum
• Solecardia
  • † Solecardia cossmani
• Solen
• Sorex

  • 

    A living Sorex cinereus , or cinereus shrew

    † Sorex cinereus
  • † Sorex fumeus
• Spermophilus
  • † Spermophilus tridecemlineatus
• † Sphaerula
  • † Sphaerula subvexa
• Sphenia – tentative report
• † Sphyraenodus
  • † Sphyraenodus speciosus

• 

  A living Sphyrna hammerhead shark

  Sphyrna
  • † Sphyrna laevissima – type locality for species
  • † Sphyrna magna
  • † Sphyrna prisca
• Spilogale
  • † Spilogale putorius – type locality for species
• † Spiniferites
  • † Spiniferites mirabilis
• Spiroplectammina
  • † Spiroplectammina spinosa
• Spisula
  • † Spisula subcuneata

• 

  Life restoration of the Oligocene-Miocene shark-toothed dolphin Squalodon

  † Squalodon
  • † Squalodon atlanticus
  • † Squalodon calvertensis – type locality for species
  • † Squalodon mento – type locality for species
  • † Squalodon protervus
  • † Squalodon whitmorei
  • † Squalodon wymanii – type locality for species
• Squatina
  • † Squatina occidentalis – type locality for species
• Squilla

  • 

    Illustration of a living Squilla empusa mantis shrimp

    † Squilla empusa
• † Stenasodelphis – type locality for genus
  • † Stenasodelphis russellae – type locality for species
• Stewartia
  • † Stewartia anodonta
  • † Stewartia foremani
• Sthenorytis
  • † Sthenorytis pachypleura
• Stramonita
  • † Stramonita haemostoma
• † Strepsidura
• Strioterebrum
  • † Strioterebrum dislocatum
• Stylopoma
  • † Stylopoma spongites
• † Sumatradinium
  • † Sumatradinium druggii
• † Syllomus
  • † Syllomus aegyptiacus – type locality for species
• Sylvilagus
  • † Sylvilagus floridanus
• Synaptomys

  • 

    A living Synaptomys cooperi , or southern bog lemming

    † Synaptomys cooperi
• † Synechodus
  • † Synechodus clarki
  • † Synechodus clarkia
• Syrnola
  • † Syrnola toulmini – type locality for species

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• Tagelus
  • † Tagelus plebeius
• Tamias
  • † Tamias striatus
• Tamiasciurus
  • † Tamiasciurus hudsonicus
• † Taphrosphys
  • † Taphrosphys miocenica – type locality for species
• † Tapiravus
  • † Tapiravus validus – or unidentified comparable form

• 

  A living Tapirus , or tapir

  Tapirus
  • † Tapirus haysii – or unidentified comparable form
• † Tasbacka
  • † Tasbacka ruhoffi – type locality for species
• Taxidea
  • † Taxidea taxus – type locality for species
• † Tectatodinium
  • † Tectatodinium pellitum
• Teinostoma
  • † Teinostoma barryi
  • † Teinostoma umbilicatum
• Tellina
  • † Tellina virginiana
  • † Tellina williamsi
• Terebra
  • † Terebra curvilirata
  • † Terebra inornata
• Terebratula
  • † Terebratula marylandica – type locality for species
• Teredo
  • † Teredo virginiana
• Terrapene
  • † Terrapene carolina
• Testudo
  • † Testudo ducateli – type locality for species
• Textularia
  • † Textularia ultimainflata
• Thamnophis

• 

  Fossilized skeleton of the Oligocene-Miocene gavial relative Thecachampsa

  † Thecachampsa
  • † Thecachampsa antiqua
  • † Thecachampsa marylandica – type locality for species
• † Thinocetus
  • † Thinocetus arthritus
• Thomomys – type locality for genus
  • † Thomomys potomacensis – type locality for species
• Thracia
  • † Thracia conradi
• Torcula
  • † Torcula variabilis
• † Tornatellaea
  • † Tornatellaea texana
• Torquesia
  • † Torquesia prehumerosa – type locality for species

• 

  A living Tremarctos , or spectacled bear

  Tremarctos
  • † Tremarctos floridanus
• † Tretosphys
  • † Tretosphys lacertosus – type locality for species
  • † Tretosphys ruschenbergeri – type locality for species
• Triloculina
  • † Triloculina rotunda
• Trionyx – report made of unidentified related form or using admittedly obsolete nomenclature
  • † Trionyx halophilus
• Triphora
  • † Triphora tricincta
• Tritonium
  • † Tritonium centrosum – type locality for species
• Trochita
  • † Trochita aperta
• † Trygon
  • † Trygon dux
• † Tuba – tentative report
• † Tuberculodinium
  • † Tuberculodinium vancampoae
• Tudicla – or unidentified comparable form
• Turricula – report made of unidentified related form or using admittedly obsolete nomenclature
• † Turrifulgur – type locality for genus
  • † Turrifulgur turriculus – type locality for species
• Turris – report made of unidentified related form or using admittedly obsolete nomenclature
  • † Turris piscatavensis
  • † Turris tysoni

• 

  Fossilized shells of the Late Jurassic-modern tower snail Turritella

  Turritella
  • † Turritella alticostata
  • † Turritella exaltata
  • † Turritella humerosa
  • † Turritella indenta
  • † Turritella indentata
  • † Turritella plebeius
  • † Turritella plebeua
  • † Turritella potomacensis
  • † Turritella subponderosa
  • † Turritella subvariabilis
  • † Turritella terebriformis

• 

  A living Tursiops , or bottlenose dolphin

  Tursiops
• Typhis
  • † Typhis acuticosta

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• Umbraculum – tentative report
• Urosalpinx
  • † Urosalpinx cinerea
  • † Urosalpinx subrusticus
• Ursus

  • 

    A living Ursus americanus , or American black bear

    † Ursus americanus

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• Venericardia
  • † Venericardia ascia
  • † Venericardia potapacoensis
  • † Venericardia regia

• 

  A living Vespertilio bat

  Vespertilio
  • † Vespertilio grandis
• Vitrinella
  • † Vitrinella clarkmartini – type locality for species
• Volutifusus
  • † Volutifusus acus – type locality for species
  • † Volutifusus asheri – type locality for species
  • † Volutifusus marylandicus – type locality for species
  • † Volutifusus meganucleus – type locality for species
  • † Volutifusus mutabilis
• Volvulella
• Vulpes

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• Xestoleberis

• 

  Fossilized skeleton of the Miocene whale Xiphiacetus

  † Xiphiacetus
  • † Xiphiacetus bossi – type locality for species
  • † Xiphiacetus cristatus – type locality for species
• Xiphias
  • † Xiphias radiata – tentative report

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• Yoldia
  • † Yoldia laevis

  • 

    Illustration of the shell of a Yoldia limatula , or file yoldia

    † Yoldia limatula
  • † Yoldia potomacensis
• † Yolida

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• † Zarhachis – type locality for genus
  • † Zarhachis crassangulum – type locality for species
  • † Zarhachis flagellator – type locality for species
  • † Zarhachis tysonii – type locality for species
• † Zikkuratia
  • † Zikkuratia danica – type locality for species
• † Zizyphinus
  • † Zizyphinus bryanii – type locality for species

References

• Various Contributors to the Paleobiology Database. "Fossilworks: Gateway to the Paleobiology Database" . Retrieved 17 December 2021.