Porcellioidea is an extinct

superfamily SUPERFAMILY is a database and search platform of structural and functional annotation for all proteins and genomes. It classifies amino acid sequences into known structural domains, especially into SCOP superfamilies. Domains are functional, str ...

of small to large

sea snail Sea snail is a common name for slow-moving marine gastropod molluscs, usually with visible external shells, such as whelk or abalone. They share the taxonomic class Gastropoda with slugs, which are distinguished from snails primarily by the ...

marine Marine is an adjective meaning of or pertaining to the sea or ocean. Marine or marines may refer to: Ocean * Maritime (disambiguation) * Marine art * Marine biology * Marine debris * Marine habitats * Marine life * Marine pollution Military * ...

gastropod The gastropods (), commonly known as snails and slugs, belong to a large taxonomic class of invertebrates within the phylum Mollusca called Gastropoda (). This class comprises snails and slugs from saltwater, from freshwater, and from land. T ...

mollusk Mollusca is the second-largest phylum of invertebrate animals after the Arthropoda, the members of which are known as molluscs or mollusks (). Around 85,000 extant species of molluscs are recognized. The number of fossil species is e ...

s in the clade Vetigastropoda. This superfamily dates back to the

Paleozoic The Paleozoic (or Palaeozoic) Era is the earliest of three geologic eras of the Phanerozoic Eon. The name ''Paleozoic'' ( ;) was coined by the British geologist Adam Sedgwick in 1838 by combining the Greek words ''palaiós'' (, "old") and ' ...

. They developed sinistrally (left-handed) or planispirally coiled teleoconchs.

Taxonomy

Bouchet & Rocroi based their classification on the study by Bandel, published in 1993. However, the position of the Porcelliidae is unsure, as noted by

Peter J. Wagner Peter J. Wagner (born 27 September 1964) is a paleontologist at the University of Nebraska-Lincoln. He received his Ph.D. in Geophysical Sciences from The University of Chicago in 1995, conducted postdoctoral research at the Smithsonian Instit ...

in 2002. Wagner reported that the Porcelliidae belongs to the subfamily Gosseletininae, family Gosseletinidae, in the superfamily

Eotomarioidea Eotomarioidea is an extinct superfamily of small to large sea snails, marine gastropod mollusks in the clade Vetigastropoda. Taxonomy * Family Eotomariidae Wenz, 1938 * Family Gosseletinidae Wenz, 1938 * Family Luciellidae Knight, 1956 * ...

. This superfamily consists of the four following families (according to the taxonomy of the Gastropoda by Bouchet & Rocroi, 2005): * † family Porcelliidae Koken, 1895 * † family

Cirridae Cirridae is an extinct family of fossil sea snails, marine gastropod mollusks in the superfamily Porcellioidea (according to the taxonomy of the Gastropoda by Bouchet & Rocroi, 2005). These snails date from the Mesozoic era, and are sinistral ...

Cossmann, 1916 * † family Discohelicidae Schröder, 1995 * † family Pavlodiscidae Frýda, 1998 (Families that are exclusively fossil are indicated with a dagger †)

References

{{Taxonbar, from=Q7229978 Vetigastropoda