Overview
Archaeogastropoda (also known as Aspidobranchia1]) was a taxonomic order of sea snails used in older classifications of gastropods, i.e. snails and slugs. Archeogastropoda are marine prosobranch gastropod mollusks, mainly herbivores, typically having two gills and a double-chambered heart, with the eggs and sperm discharged directly into the water. They were traditionally regarded as a relatively primitive group.
This older classification of the gastropods is based on the classification of Johannes Thiele (1925). This classification was not based on true phylogenetic relationships, but on more general affinities between the groups. In the last few years, two new cladistic taxonomies of the gastropods have been published (in 1997 and 2005). This has led to an extensive reclassification of gastropod taxa. The taxon Archaeogastropoda was found to be a paraphyletic group, and therefore unacceptable in a strictly cladistic classification.
In the 1997 classification, most of the former Archaeogastropoda were included in:
- subclass Eogastropoda
- order Patellogastropoda (limpets)
- subclass Orthogastropoda
- Superorder Vetigastropoda Salvini-Plawen, 1989
- Superorder Koken, 1896 (with the order Neritopsina Cox & Knight, 1960).
A more detailed classification can be found on Gastropoda.
Older system of classification
- Order Archaeogastropoda
- Superfamily Pleurotomariacea
- Family Pleurotomariidae
- Family Haliotidae
- Family Scissurellidae
- Superfamily Fissurellacea
- Family Fissurellidae
- S
uperfamily Patellacea
- Family Patellidae
- Family Acmaeidae
- Family Lepetidae
- Superfamily Trochacea
- Family Calliostomatidae
- Family Trochidae
- Family Stomatellidae
- Family Cyclostrematidae
- Family Turbinidae
- Family Phasianellidae
- Superfamily Neritacea
- Family Neritidae
- Family Helicinidae
- Family Hydrocenidae
- Superfamily Pleurotomariacea
This older classification of the gastropods is based on the classification of Johannes Thiele (1925). This classification was not based on true phylogenetic relationships, but on more general affinities between the groups. In the last few years, two new cladistic taxonomies of the gastropods have been published (in 1997 and 2005). This has led to an extensive reclassification of gastropod taxa. The taxon Archaeogastropoda was found to be a paraphyletic group, and therefore unacceptable in a strictly cladistic classification.
In the 1997 classification, most of the former Archaeogastropoda were included in:
- subclass Eogastropoda
- order Patellogastropoda (limpets)
- subclass Orthogastropoda
- Superorder Vetigastropoda Salvini-Plawen, 1989
- Superorder Koken, 1896 (with the order Neritopsina Cox & Knight, 1960).
A more detailed classification can be found on Gastropoda.
Older system of classification
- Order Archaeogastropoda
- Superfamily Pleurotomariacea
- Family Pleurotomariidae
- Family Haliotidae
- Family Scissurellidae
- Superfamily Fissurellacea
- Family Fissurellidae
- Superfamily Patellacea
- Family Patellidae
- Family Acmaeidae
- Family Lepetidae
- Superfamily Trochacea
- Family Calliostomatidae
- Family Trochidae
- Family Stomatellidae
- Family Cyclostrematidae
- Family Turbinidae
- Family Phasianellidae
- Superfamily Neritacea
- Family Neritidae
- Family Helicinidae
- Family Hydrocenidae
- Superfamily Pleurotomariacea
References
External links
- Sasaki T. (1998). "Comparative anatomy and phylogeny of the recent Archaeogastropoda (Mollusca: Gastropoda)". Bulletin 38. Tokio.
Taxonomy
The Order Archaeogastropoda is further organized into finer groupings including:
- Family (14): Calliostomatidae · Cyathermidae · Haliotididae · Liotiidae · Lottidae · Microdomatidae · Pareoridae · Portlockiellidae · Sinuitidae · Sinuopeidae · Solariellidae · Tricoliidae · Turbiniidae · Umboniidae
- Species: ZipcodeZoo has pages for 2,322 species and subspecies in the Order Archaeogastropoda.
Families
Calliostomatidae
Calliostomatidae is a family of sea snails within the superfamily Trochoidea and the clade Vetigastropoda. [more]
Cyathermidae
Haliotididae
Liotiidae
Lottidae
Microdomatidae
Pareoridae
Portlockiellidae
Sinuitidae
Sinuitidae is an extinct family of paleozoic molluscs of uncertain position (Gastropoda or Monoplacophora) with isostrophically coiled shells. [more]
Sinuopeidae
Sinuopeidae is an extinct family of paleozoic gastropod mollusks. [more]
Solariellidae
Tricoliidae
Turbiniidae
Umboniidae
More info about the Family Umboniidae may be found here.
References
Sources
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