Pelagiellidae is an
extinct family
Family (from la, familia) is a group of people related either by consanguinity (by recognized birth) or affinity (by marriage or other relationship). The purpose of the family is to maintain the well-being of its members and of society. Idea ...
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 ' ...
fossil
A fossil (from Classical Latin , ) is any preserved remains, impression, or trace of any once-living thing from a past geological age. Examples include bones, shells, exoskeletons, stone imprints of animals or microbes, objects preserved ...
'snails'. Some material assigned to this taxon represents gastropod molluscs, but some chaeta-bearing specimens first assigned to ''Pelagiella'' (now ''
Pseudopelagiella'') are perhaps better interpreted as tube-bearing annelid worms.
Mineralogy
Aragonite, with various microstructures - details in reference
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 Pelagiellidae in the superfamilia
Pelagielloidea within the
Paleozoic molluscs of uncertain systematic position. This family has no subfamilies.
According to P. Yu. Parkhaev, the family Pelagiellidae is in the order
Pelagiellifomes MacKinnon, 1985 within the subclass
Archaeobranchia Parkhaev, 2001, in the class
Helcionelloida
Helcionelloida is an extinct group of ancient molluscs (phylum Mollusca). These are the oldest known conchiferan molluscs, that is, they had a mineralised shell. Some members of this class were mistaken for Monoplacophorans. The class was ...
Peel, 1991.
Genera
Genera in the family Pelagiellidae include:
* ''
Pelagiella'' Matthew, 1895
[ Matthew G.F. 1895. ''The Protolenus fauna'']
Transactions of the New York Academy of Sciences 14101
153. Pelagiella on th
page 131Plate VI.
figure 6 a-c. -
type genus
In biological taxonomy, the type genus is the genus which defines a biological family and the root of the family name.
Zoological nomenclature
According to the International Code of Zoological Nomenclature, "The name-bearing type of a nominal ...
of the family Pelagiellidae
** ''
Pelagiella atlantoides'' - synonym: ''Cyrtolithes atlantoides''
** ''
Pelagiella emeishanensis''
image* ''
Proeccyliopterus'' Kobayashi, 1962
* ''
Protoscaevogyra'' Kobayashi, 1939
* ''
Cambretina'' Horný, 1964
* ''
Costipelagiella'' Horný, 1964
References
External links
Helcionelloida
Fossils of Georgia (U.S. state)
Paleozoic life of Quebec
{{paleo-gastropod-stub