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Cardium pygmaeum

Bivalvia - Cardiida - Cardiidae

Taxonomy
Cardium pygmaeum was named by Hisinger (1837). It is a 3D body fossil. Its type locality is Porkuni, Siuge Member, which is in a Porkuni perireef or subreef lime mudstone/chert in the Ă„rina Formation of Estonia.

It was recombined as Pleurorhynchus pygmaea by Barrande (1881); it was recombined as Conocardium pygmaea by Branson (1942); it was recombined as Hippocardia pygmaea by Pojeta and Runnegar (1976); it was recombined as Pojetaconcha pygmaea by Wagner (2017).

Synonymy list
YearName and author
1837Cardium pygmaeum Hisinger p. 63 figs. pl. 19 f. 6a-c
1881Pleurorhynchus pygmaea Barrande
1942Conocardium pygmaea Branson
1976Hippocardia pygmaea Pojeta and Runnegar p. 76 figs. pl. 50 f. 3
2017Pojetaconcha pygmaea Wagner p. S3096

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RankNameAuthor
kingdomAnimalia()
Bilateria
EubilateriaAx 1987
Protostomia
Spiralia
superphylumLophotrochozoa
phylumMollusca
classBivalvia
Eubivalvia
subclassAutobranchia(Groblen 1894)
infraclassHeteroconchia(Cox 1960)
CardiomorphiFerussac 1822
CardioniFerussac 1822
RankNameAuthor
CardiidiaFerussac 1822
CardiataFerussac 1822
superorderCardiiformiiFerussac 1822
orderCardiidaFerussac 1822
suborderCardiidinaFerussac 1822
CardioideiFerussac 1822
superfamilyCardioidea(Lamarck 1809)
familyCardiidaeLamarck 1809
Neocardiids
EucardiidsSchneider 1995
subfamilyCardiinaeLamarck 1809
genusCardiumLinnaeus 1758
speciespygmaeum

If no rank is listed, the taxon is considered an unranked clade in modern classifications. Ranks may be repeated or presented in the wrong order because authors working on different parts of the classification may disagree about how to rank taxa.

Diagnosis
No diagnoses are available