Pleurotomariacea

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Pleurotomariacea
Temporal range: U Cam - Rec
Entemnotrochus rumphii.jpg
Apertural view of a shell of Entemnotrochus rumphii
Scientific classification
Kingdom:
Animalia
Phylum:
Mollusca
Class:
Gastropoda
Order:
Archaeogastropoda [1]
Superfamily:
Pleurotomariacea
Families

See text

Pleurotomariacea is one of two names that are used for a taxonomic superfamily of sea snails that are an ancient lineage and are well represented in the fossil record. The name Pleurotomariacea is used by paleontologists, who, because they usually have only the hard parts of mollusks to study, often use a slightly different scheme of classification from that used by scientists who study living mollusks.

The name Pleurotomariacea is based on Swainson, 1840 (Pleurotomariae) and was described in 1960 in the Treatise on Invertebrate Paleontology, (I197) [2] The taxon was established for mostly conispiral, but also discoidal and auriform (ear-like) shells which have a nacreous, aragonite, inner layer.

The Pleurotomariacea, now often seen as Pleurotomarioidea, has been included in the Archaegastropoda. [3] although more recent classifications put it in a more restricted sense in the Vetigastropoda [4]

The evolutionary derivation of the group is thought to be from the Bellerophontacea and to have happened late in the Cambrian. Earlier gastropods belonged to the Helcionellacea, Bellerophontacea, and questionably to the Palegiellacea. [2]

The Treatise lists the following families, here in alphabetical order. Catantostomatidae, Eotomariidae, Euomphalopteridae, Gosselitinidae, Haliotidae, Kittlidiscidae, Laubellidae, Lophospiridae, Luciellidae, Phanerotrematidae, Phymatopleuridae, Pleurotromariidae, Polytremerida, Portlockiellidae, Rhaphischismatidae, Raphystomatidae, Scissurellidae, Sinuopeidae, Tremnotropidae, Trochotomidae, Zygitidae.

Bouchet & Rocroi, 2005, with a greater emphasis on molecular characteristics than shell characters, limited the Pleurotomariacea, as Pleurotomarioidea, to the Pleurotomariidae, Catantostomatidae, Kittilidacidae, Phymatopleuridae, Portlockiellidae, Rhaphischismatidae, Trochotomidae, and Zygitidae. The other families that are included in this superfamily in the Treatise have been reassigned by Bouchet & Rocroi to other higher taxa.

Recent families

The following are the Recent families in the superfamily, along with their respective living species: [5]

Related Research Articles

<span class="mw-page-title-main">Abalone</span> Common name for a group of sea snails

Abalone is a common name for any small to very large marine gastropod mollusc in the family Haliotidae, which once contained six genera but now contains only one genus, Haliotis. Other common names are ear shells, sea ears, and, now rarely, muttonfish or muttonshells in parts of Australia, ormer in the United Kingdom, perlemoen in South Africa, and pāua in New Zealand. The number of abalone species recognized worldwide ranges between 30 and 130 with over 230 species-level taxa described. The most comprehensive treatment of the family considers 56 species valid, with 18 additional subspecies.

<i>Haliotis cracherodii</i> Species of gastropod

Haliotis cracherodii, the black abalone, is a species of large edible sea snail, a marine gastropod mollusk in the family Haliotidae, the abalones.

<i>Haliotis asinina</i> Species of gastropod

Haliotis asinina, common name the ass's-ear abalone, is a fairly large species of sea snail, a tropical gastropod mollusk in the family Haliotidae, the abalones, also known as ormers or pāua. Both the common name and the scientific name are based on the shape of the shell, which is long, narrow and curved, resembling the shape of a donkey's ear.

<i>Haliotis rufescens</i> Species of gastropod

Haliotis rufescens is a species of very large edible sea snail in the family Haliotidae, the abalones, ormers (British) or pāua. It is distributed from British Columbia, Canada, to Baja California, Mexico. It is most common in the southern half of its range.

<span class="mw-page-title-main">Green ormer</span> Species of gastropod

The green ormer is a northeast Atlantic and Mediterranean species of sea snail, a coastal marine gastropod mollusc in the family Haliotidae, the abalones or ormer snails.

<i>Perotrochus</i> Genus of gastropods

Perotrochus is a genus of large sea snails with gills and an operculum, marine gastropod mollusks in the family Pleurotomariidae, the slit snails,.

<i>Entemnotrochus rumphii</i> Species of mollusc

Entemnotrochus rumphii, common name the Rumphius' slit shell, is a species of large sea snail with gills and an operculum, a marine gastropod mollusc in the family Pleurotomariidae, the slit snails.

<span class="mw-page-title-main">Pleurotomarioidea</span> Superfamily of gastropods

Pleurotomarioidea is a superfamily of small to large marine gastropods included in the order Pleurotomariida of the subclass Vetigastropoda.

<i>Haliotis pourtalesii</i> Species of gastropod

Haliotis pourtalesii, common name Pourtale's abalone, is a rare species of deepwater sea snail, a marine gastropod mollusk in the family Haliotidae, the abalones.

<i>Haliotis cyclobates</i> Species of gastropod

Haliotis cyclobates, common name the whirling abalone or the circular ear shell, is a species of sea snail, a marine gastropod mollusk in the family Haliotidae, the abalones.

Haliotis dissona is a species of sea snail, a marine gastropod mollusk in the family Haliotidae, the abalones.

<i>Haliotis fulgens</i> Species of gastropod

Haliotis fulgens, commonly called the green abalone, is a species of large sea snail, a marine gastropod mollusc in the family Haliotidae, the abalones. The shell of this species is usually brown, and is marked with many low, flat-topped ribs which run parallel to the five to seven open respiratory pores that are elevated above the shell's surface. The inside of the shell is an iridescent blue and green.

<i>Haliotis ovina</i> Species of gastropod

Haliotis ovina, common name the sheep's ear abalone, is a species of sea snail, a marine gastropod mollusk in the family Haliotidae, the abalones.

<i>Haliotis scalaris</i> Species of gastropod

Haliotis scalaris, common name the staircase abalone or the ridged ear abalone, is a species of sea snail, a marine gastropod mollusk in the family Haliotidae, the abalones.

<i>Haliotis walallensis</i> Species of gastropod

Haliotis walallensis, common name the flat abalone, is a species of sea snail, a marine gastropod mollusk in the family Haliotidae, the abalones.

<i>Entemnotrochus adansonianus</i> Species of gastropod

Entemnotrochus adansonianus, common name Adanson's slit shell, is a species of sea snail, a marine gastropod mollusk in the family Pleurotomariidae.

<i>Mikadotrochus hirasei</i> Species of gastropod

Mikadotrochus hirasei, common name the emperor's slit shell, is a species of large deepwater sea snail, a marine gastropod mollusk in the family Pleurotomariidae, the slit snails.

<span class="mw-page-title-main">Selenizone</span>

A selenizone is an anatomical structure that exists in the shells of some families of living sea snails: the slit shells, the little slit shells and the abalones, which are marine gastropod mollusks from ancient lineages.

<i>Microtis</i> (gastropod) Genus of gastropods

Microtis is a genus of sea snails, marine gastropod mollusks in the family Trochidae, the top snails.

<i>Haliotis</i> Genus of gastropods

Haliotis, common name abalone, is the only genus in the family Haliotidae.

References

  1. ↑ “Pleurotomaria (Perotrochus) hirasei”
  2. 1 2 Treatise on Invertebrate Paleontology Part I, R.C. Moore (ed) Geol Soc of America and Univ. Kansas Press, 1960.
  3. ↑ "Answers - the Most Trusted Place for Answering Life's Questions". Answers.com .
  4. ↑ Classification of P. Bouchet et al. 2005
  5. ↑ “PLEUROTOMARIACEA”
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