Amphiscapha

Last updated

Amphiscapha
Temporal range: Penn - L Perm
Scientific classification
Kingdom:
Phylum:
Class:
Superfamily:
Family:
Genus:
Amphiscapha

J.B. Knight, 1942

Amphiscapha is a fossil gastropod mollusk, or less likely a monoplacophoran, genus from the Pennsylvanian and Lower Permian of North and South America, included in the family Euomphalidae. It is sometimes regarded as a subgenus of Straparollus , S. (Amphiscapha) Knight 1942

Description

The shell in this genus is hyper strophic discoidal, with a flat base and a concave upper side. The location of what is presumed to be the exhalent channel is marked by a smooth or rugose ridge along the upper-outer margin, which lies along the edge of a flat to concave outer rim.

Related Research Articles

<i>Gilmoreosaurus</i> Hadrosauroid dinosaur genus from the Late Cretaceous

Gilmoreosaurus is the name given to a genus of dinosaur from the Cretaceous of Asia. The type species is Gilmoreosaurus mongoliensis. It is believed to be a hadrosaur or iguanodont from the Iren Dabasu Formation of Inner Mongolia, dating to 96 Ma ago. Additional specimens have been described as distinct species, including G. atavus from the Khodzhakul Formation of Uzbekistan and G. arkhangelskyi from the Bissekty Formation. However, these are based on very fragmentary remains, and their classification is dubious. An additional species, G. kysylkumense is sometimes included, though it has also been referred to the related genus Bactrosaurus.

<span class="mw-page-title-main">Wing of ilium</span> Flat portion of the hip bone

The wing(ala)of ilium is the large expanded portion of the ilium, the bone which bounds the greater pelvis laterally. It presents for examination two surfaces—an external and an internal—a crest, and two borders—an anterior and a posterior.

<i>Kaijiangosaurus</i> Extinct genus of dinosaurs

Kaijiangosaurus is a genus of carnivorous tetanuran theropod dinosaur from the Middle Jurassic of China. In 1984 He Xinlu named and described the type species Kaijiangosaurus lini. The generic name refers to the River (jiang) Kai. The specific name honours the paleontologist Lin Wenqiu.

<i>Celaenorrhinus</i> Genus of butterflies

Celaenorrhinus is a genus of skipper butterflies which are commonly termed sprites. An alternate name is flats, for their habit of holding their wings flat when resting, but this is also used for related genera. They are the type genus of tribe Celaenorrhinini.

<span class="mw-page-title-main">Rüppell's broad-nosed bat</span> Species of bat

Rüppell's or the greater broad-nosed bat is a species of vespertilionid microbat found in eastern Australia.

Pachycheilosuchus is an extinct genus of neosuchian from the Early Cretaceous of Texas, United States. Previously known, in part, as the "Glen Rose form", this crocodylomorph is notable for its procoelous vertebrae, otherwise found only in derived eusuchian crocodilians, a thick margin on the maxillae, and a shield of armor on the neck formed by the fusion of six individual scutes.

<i>Brancasaurus</i> Extinct genus of reptiles

Brancasaurus is a genus of plesiosaur which lived in a freshwater lake in the Early Cretaceous of what is now North Rhine-Westphalia, Germany. With a long neck possessing vertebrae bearing distinctively-shaped "shark fin"-shaped neural spines, and a relatively small and pointed head, Brancasaurus is superficially similar to Elasmosaurus, albeit smaller in size at 3.26 metres (10.7 ft) in length as a subadult.

<i>Euomphalus</i> Genus of archaeogastropods

Euomphalus is a genus of fossil marine gastropods known to have lived from the Silurian to the Middle Permian.

<span class="mw-page-title-main">Macluritidae</span> Extinct family of gastropods

Macluritidae is an extinct family of relatively large, Lower Ordovician to Devonian, macluritacean gastropods(?), hypserstrophically coiled, that is dextral while appearing sinistral, of which the genus Maclurites is arch-typical. The base of their shells is flat or gently protruding while the upper side is generally concave.

<i>Vancleavea</i> Extinct genus of reptiles

Vancleavea is a genus of extinct, armoured, non-archosaurian archosauriforms from the Late Triassic of western North America. The type and only known species is V. campi, named by Robert Long & Phillip A Murry in 1995. At that time, the genus was only known from fragmentary bones including osteoderms and vertebrae. However, since then many more fossils have been found, including a pair of nearly complete skeletons discovered in 2002. These finds have shown that members of the genus were bizarre semiaquatic reptiles. Vancleavea individuals had short snouts with large, fang-like teeth, and long bodies with small limbs. They were completely covered with bony plates known as osteoderms, which came in several different varieties distributed around the body. Phylogenetic analyses by professional paleontologists have shown that Vancleavea was an archosauriform, part of the lineage of reptiles that would lead to archosaurs such as dinosaurs and crocodilians. Vancleavea lacks certain traits which are present in most other archosauriforms, most notably the antorbital, mandibular and supratemporal fenestrae, which are weight-saving holes in the skulls of other taxa. However, other features clearly support its archosauriform identity, including a lack of intercentra, the presence of osteoderms, an ossified laterosphenoid, and several adaptations of the femur and ankle bones. In 2016, a new genus of archosauriform, Litorosuchus, was described. This genus resembled both Vancleavea and more typical archosauriforms in different respects, allowing Litorosuchus to act as a transitional fossil linking Vancleavea to less aberrant archosauriforms.

<i>Calliotropis ottoi</i> Species of gastropod

Calliotropis ottoi, common name Otto's spiny margarite, is a species of sea snail, a marine gastropod mollusc in the family Eucyclidae.

<i>Miniopterus mahafaliensis</i> A bat in the genus Miniopterus that occurs in southwestern Madagascar

Miniopterus mahafaliensis is a bat in the genus Miniopterus that occurs in southwestern Madagascar. Populations of this species have historically been included in Miniopterus manavi, but molecular data published in 2008 and 2009 indicate that this supposed species in fact consists of five separate species, including the newly described M. mahafaliensis. The species has been found in dry, spiny, and gallery forest, as well as more open habitats, in southwestern Madagascar.

<i>Forresteria</i> Genus of molluscs (fossil)

Forresteria is an extinct genus of cephalopod belonging to the subclass Ammonoidea. They flourished during the late Turonian and early Santonian of the Late Cretaceous, and were global in extent. Forresteria alluaudi and Forresteria hobsoni are considered marker fossils for the lower Coniacian in the American West.

<i>Bicentenaria</i> Extinct species of reptile

Bicentenaria is an extinct genus of carnivorous coelurosaurian theropods which lived during the early Late Cretaceous (Cenomanian) Candeleros Formation of Argentina. It contains the type species, B. argentina.

<i>Carenzia melvilli</i> Species of gastropod

Carenzia melvilli is a species of small deep water sea snails, a marine gastropod mollusk in the family Seguenziidae.

Nundasuchus is an extinct genus of crurotarsan, possibly a suchian archosaur related to Paracrocodylomorpha. Remains of this genus are known from the Middle Triassic Manda beds of southwestern Tanzania. It contains a single species, Nundasuchus songeaensis, known from a single partially complete skeleton, including vertebrae, limb elements, osteoderms, and skull fragments.

<i>Gigantostrea</i> Extinct genus of bivalves

Gigantostrea is an extinct genus of marine bivalve mollusks belonging to the family Gryphaeidae.

<i>Chiappeavis</i> Extinct genus of birds

Chiappeavis is a genus of enantiornithean bird from Early Cretaceous of northeastern China. The only species is Chiappeavis magnapremaxillo. Chiappeavis is classified within the family Pengornithidae. It is known from a single, almost complete skeleton including feather impressions discovered in the Jiufotang Formation of the Jehol Group. Long feathers formed a fan-shaped tail that was probably employed in flight.

Yuanjiawaornis is an extinct genus of large enantiornithean bird known from the early Cretaceous of present-day China. It is monotypic, with only type species Y. virisosus known.

<i>Stegouros</i> Extinct genus of dinosaurs

Stegouros is a genus of ankylosaurian dinosaur from the Late Cretaceous Dorotea Formation of southern Chile. The genus contains a single species, Stegouros elengassen, known from a semi-articulated, near-complete skeleton.

References