†Archinacellidae 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
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 of uncertain position (
Gastropoda
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. ...
or
Monoplacophora
Monoplacophora , meaning "bearing one plate", is a polyphyletic superclass of molluscs with a cap-like shell inhabiting deep sea environments . Extant representatives were not recognized as such until 1952; previously they were known only from ...
).
Description
These are cap-shaped fossil shells.
Taxonomy
The
taxonomy of the Gastropoda by Bouchet & Rocroi, 2005[Bouchet P. & Rocroi J.-P. (Ed.); Frýda J., Hausdorf B., Ponder W., Valdes A. & 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 Archinacellidae in the superfamilia
Archinacelloidea
†Archinacelloidea is an extinct superfamily of paleozoic molluscs of uncertain position (Gastropoda or Monoplacophora
Monoplacophora , meaning "bearing one plate", is a polyphyletic superclass of molluscs with a cap-like shell inhabiting de ...
within the
Paleozoic molluscs of uncertain systematic position. This family has no subfamilies.
Genera
Genera in the family Archinacellidae include:
* ''
Archinacella'' Ulrich & Scofield, 1897 -
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 f ...
of the family Archinacellidae
** ''
Archinacella powersi'' Ulrich & Scofield, 1897 - type species
** ''
Archinacella instabilis'' (
Billings
Billings is the largest city in the U.S. state of Montana, with a population of 117,116 as of the 2020 census. Located in the south-central portion of the state, it is the seat of Yellowstone County and the principal city of the Billings Metrop ...
, 1865)
[ Billings E. 1865]
''Palaeozoic Fossils. Volume I. Containing descriptions and figures of new or little known species of organic remains from the Silurian rocks, 1861–1865''
Dawson Brothers, Montreal. Geological Survey of Canada
The Geological Survey of Canada (GSC; french: Commission géologique du Canada (CGC)) is a Canadian federal government agency responsible for performing geological surveys of the country, developing Canada's natural resources and protecting the en ...
, Separate Report, 426 pp
page 251
* ''
Barrandicella'' Peel & Horný, 1999
* ''
Barrandicellopsis'' Horný, 2000
[Horný R. J. 2000]
''Barrandicellopsis, a new Ordovician archinacelloid genus (Mollusca, Gastropoda)''
Věstník Českého geologického ústavu 75, 2.
** ''
Barrandicellopsis ovata'' - synonym: ''
Archinacella ovata''
Barrande in
Perner, 1903 - Archinacella ovata var. elevata Barrande in Perner, 1903 - type species, Middle Ordovician from Bohemia
** ''
Barrandicellopsis extenuata'' - synonym: ''Orthonychia extenuata'' Barrande in Perner, 1903 - probably belongs to genus ''Barrandicellopsis'', Middle Ordovician from Bohemia
References
External links
images
Late Ordovician extinctions
Middle Ordovician first appearances
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