Pleurotomariacea

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Pleurotomariacea
Temporal range: U Cam - Rec
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, Scisserelllidae, 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]

  • Pleurotomariidae
    • Pleurotomaria (Entemnotrochus) adansonianus (Adanson’s Slit Shell; found in West Indies and the Caribbean)
    • Pleurotomaria (Entemnotrochus) rumphii (Rumphius’ Slit Shell; found in Japan and Taiwan)
    • Pleurotomaria (Mikadotrochus) beyrichii (Beyrich’s Slit Shell; found in the deep water of China and Japan)
    • Pleurotomaria (Mikadotrochus) mikadotrochus (Emperor’s Slitshell; found in Japan)
    • Pleurotomaria (Mikadotrochus) notialis (found in southern Brazil)
    • Pleurotomaria (Mikadotrochus) salmianus (Salmiana Slit Shell; found in Japan)
    • Pleurotomaria (Mikadotrochus) schmalzi (found in Japan)
    • Pleurotomaria (Perotrochus) africana (South African Slit Shell; found in South Africa): synonym of Bayerotrochus africanus (Tomlin, 1948)
    • Pleurotomaria (Perotrochus) amabilis (Lovely Slit Shell; found in west Florida in the Lower Florida Keys)
    • Pleurotomaria (Perotrochus) anseeuwi
    • Pleurotomaria (Perotrochus) atlantica (Atlantic Slit Shell; found in Brazil)
    • Pleurotomaria (Perotrochus) caledonicus
    • Pleurotomaria (Perotrochus) diluculum (Dawn Slit Shell; found in central Japan)
    • Pleurotomaria (Perotrochus) gemma (Jewel Slit Shell; found in Barbados, Lesser Antilles)
    • Pleurotomaria (Perotrochus) gotoi
    • Pleurotomaria (Perotrochus) hirasei (The Emperor’s/Hirasei’s Slit Shell; found in the deep water of Japan)
    • Pleurotomaria (Perotrochus) lucaya (Lucayan Slit Shell; found in Grand Bahama Island)
    • Pleurotomaria (Perotrochus) midas (King Midas’s Slit Shell; found in the central Bahama Islands)
    • Pleurotomaria (Perotrochus) pyramus (Pyramus Slit Shell; found in Guadeloupe, Lesser Antilles)
    • Pleurotomaria (Perotrochus) quoyana (Quoy’s Slit Shell; found in the Gulf of Mexico)
    • Pleurotomaria (Perotrochus) teramachii (found in Japan and Taiwan)
    • Pleurotomaria (Perotrochus) vicdani
    • Pleurotomaria (Perotrochus) westralis
  • Scissurellidae
    • Schismope cingulata (found in the West Indies)
  • Haliotidae

References

  1. Pleurotomaria (Perotrochus) hirasei
  2. 2.0 2.1 Treatise on Invertebrate Paleontology Part I, R.C. Moore (ed) Geol Soc of America and Univ. Kansas Press, 1960.
  3. http://www.answers.com/topic/pleurotomariacea
  4. Classification of P. Bouchet et al. 2005
  5. PLEUROTOMARIACEA
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