Helicotomidae is an extinct
family
Family (from la, familia) is a Social group, group of people related either by consanguinity (by recognized birth) or Affinity (law), affinity (by marriage or other relationship). The purpose of the family is to maintain the well-being of its ...
of
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 ' ...
mollusc
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 esti ...
s (
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 ...
s?)
with anisostrophically coiled shells of uncertain position (Gastropoda?) (according to the
taxonomy of the Gastropoda by Bouchet & Rocroi, 2005).
Taxonomy
The
taxonomy of the Gastropoda by Bouchet & Rocroi, 2005[Bouchet P. & Rocroi J.-P. (Ed.); Frýda J., Hausdorf B., Ponder W., Valdés Á. & Warén A. 2005. ''Classification and nomenclator of gastropod families''. Malacologia: International Journal of Malacology, 47(1-2). ConchBooks: Hackenheim, Germany. . ISSN 0076-2997. 397 pp. http://www.vliz.be/Vmdcdata/imis2/ref.php?refid=78278] categorizes Helicotomidae in the superfamilia
Euomphaloidea
Euomphaloidea, originally Euomphalacea, is an extinct superfamily of marine molluscs that lived from the Early Ordovician to the Late Cretaceous, included in the Gastropoda Moore R. C., Lalicker & Fischer (1952). ''Invertebrate Fossils''. McGraw ...
within the
Paleozoic molluscs with anisostrophically coiled shells of uncertain position (Gastropoda?). This family has no subfamilies.
Genera
Genera in the family Helicotomidae include:
[''Helicotomidae''. ]The Paleobiology Database
The Paleobiology Database is an online resource for information on the distribution and classification of fossil animals, plants, and microorganisms.
History
The Paleobiology Database (PBDB) originated in the NCEAS-funded Phanerozoic Marine Pale ...
, accessed 13 August 2009.
* ''
Amphelissa''
* ''
Boucotspira''
* ''
Boucotspira''
* ''
Burdikinia'' - synonym: ''Polyamma''.
* ''
Colpomphalus''
* ''
Helicotoma'' Satler, 1859 -
type genus of the family Helicotomidae
* ''
Lophonema'' - synonym: ''Polhemia''.
* ''
Ophiletina''
* ''
Palaeomphalus''
* ''
Paraviviana''
* ''
Walcottoma''
* ''
Yochelsoniella''
References
Prehistoric mollusc families
Paleozoic molluscs
{{paleo-gastropod-stub