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Heminajas ✝

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Source Data

Source	ID	Link
Global Biodiversity Information Facility ID (GBIF)	8249330	https://www.gbif.org/species/8249330
PaleoBioDB ID (PBDB)	17212	https://paleobiodb.org/classic/checkTaxonInfo?taxon_no=17212

Rank

genus

Taxonomy (GBIF)

Life : Animalia : Mollusca : Bivalvia : Trigoniida : Trigonodidae : Heminajas

Taxonomy (PBDB)

Life : Animalia : Mollusca : Bivalvia : Trigoniida : Myophoriidae : Heminajas

Taxonomic Status (GBIF)

accepted

Classification
(PBDB,GBIF)

Rank	Name	Author
-	Eukaryota
-	Opisthokonta	Cavalier-Smith 1987
kingdom	Animalia
-	Bilateria
-	Eubilateria	Ax 1987
-	Protostomia	Grobben 1908
-	Spiralia
superphylum	Lophotrochozoa
phylum	Mollusca	Linnaeus 1758
class	Bivalvia	Linnaeus 1758
-	Eubivalvia	Carter 2011
subclass	Autobranchia
infraclass	Heteroconchia
-	Uniomorphi	Gray 1854
-	Unioni	Gray 1854
-	Unionata	Gray 1854
order	Trigoniida
superfamily	Trigonioidea	Lamarck 1819
family	Myophoriidae	Bronn 1847
genus	Heminajas	Neumayr 1891

Scientific Name

Heminajas Neumayr, 1891

Name Published In

Denskchr. Akad. Wiss. Wien, 58 (1), 789

Opinions (PBDB)

Name	Rank	Opinion	Evidence	Author
Heminajas	subgenus	belongs to Myophoria	stated without evidence	Waagen, 1907
Heminajas	genus	belongs to Trigonioida	second hand	Sepkoski, 2002
Heminajas	genus	belongs to Myophoriidae	stated with evidence	Hautmann et al., 2013

Status (PBDB)

extinct

Taxon Size (PBDB)

First Recorded Appearance

252 - 247 Ma
Phanerozoic

Last Recorded Appearance

228 - 209 Ma
Late/Upper Triassic

Motility

facultatively mobile (based on Trigoniida)

Vision

blind (based on Bivalvia)

Diet

suspension feeder (based on Trigoniida)

Taphonomy

aragonite (based on Bivalvia)

Primary Reference (PBDB)

J. J. Sepkoski, Jr. 2002. A compendium of fossil marine animal genera. Bulletins of American Paleontology 363:1-560

Fossil Distribution

Subtaxa

Name	Status	Common Name(s)	Fossil Occurrences	Oldest	Youngest
Heminajas balatonis ✝ species	listed (PBDB)		6	252 Ma Permian	251 Ma Early/Lower Triassic
Heminajas fissidentata ✝ species	listed (PBDB)		27	242 Ma Middle Triassic	232 Ma Late/Upper Triassic
Heminajas fornulata ✝ species	accepted (GBIF) listed (PBDB)
Heminajas forulata species	accepted (GBIF)	No associated record in PBDB
Heminajas geyeri ✝ species	accepted (GBIF) listed (PBDB)		2	242 Ma Middle Triassic	235 Ma Late/Upper Triassic
Haastina haastiana ✝ species	accepted (GBIF) listed (PBDB)
Heminajas qinghaiensis ✝ species	listed (PBDB)		1	228 Ma Late/Upper Triassic	228 Ma Late/Upper Triassic
Heminajas woehrmanni ✝ species	accepted (GBIF) listed (PBDB)		4	242 Ma Middle Triassic	235 Ma Late/Upper Triassic

Synonymy List

Year	Name and Author
1891	Heminajas Wöhrmann
1907	Myophoria (Heminajas) Waagen
2002	Heminajas Sepkoski, Jr.
2013	Heminajas Hautmann et al. p. 282

References

Sepkoski, Jr. J. J. (2002) A compendium of fossil marine animal genera, Bulletins of American Paleontology 363, 1-560

Waagen L. (1907) Die Lamellibranchiaten der Pachycardientuffe der Seiser Alm nebst vergleichend paläontologischen und phylogenetischen Studien, Abhandlungen der Kaiserlich-Königlichen Geologischen Reichsanstalt 18 2, 1-180

Hautmann M., Smith A. B., et al (2013) Bivalves from the Olenekian (Early Triassic) of south-western Utah: systematics and evolutionary significance, Journal of Systematic Palaeontology 11, 263-293

Nomenclator Zoologicus. A list of the names of genera and subgenera in zoology from the tenth edition of Linnaeus, 1758 to the end of 2004. Digitised by uBio from vols. 1-9 of Neave (ed.), 1939-1996 plus supplementary digital-only volume. http://ubio.org/NomenclatorZoologicus (as at 2006). - via The Interim Register of Marine and Nonmarine Genera

Sepkoski, J. J., Jr. (2002). A compendium of fossil marine animal genera. Bulletins of American Paleontology. 363, 1-560. - via The Interim Register of Marine and Nonmarine Genera

WoRMS (Nov 2016). - via The Interim Register of Marine and Nonmarine Genera

Denskchr. Akad. Wiss. Wien, 58 (1), 789 - via The Interim Register of Marine and Nonmarine Genera

Data courtesy of: PBDB: The Paleobiology Database, Creative Commons CC-BY licenced. , GBIF: the Global Biodiversity Information Facility, various licences, iDigBio, various licences, and EOL: The Encyclopedia of Life (Open Data Public Domain). Because fossils are made of minerals too!

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