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Taxonomy
Trachycardium (Agnocardia) was named by Stewart (1930). Its type is Cardium (Trachycardium) claibornense.
It was reranked as Agnocardia by Dockery (1982), Vokes (1984), Todd (2001) and Sepkoski (2002); it was Bucardium (Agnocardia) by Schneider (2002); it was Acanthocardia (Agnocardia) by Squires and Demetrion (1992) and Moore (2003).
It was assigned to Trachycardium by Vokes (1939); to Cardiinae by Dockery (1982) and Vokes (1984); to Cardiidae by Todd (2001); to Orthocardiinae by Schneider (2002); to Veneroida by Sepkoski (2002); and to Acanthocardia by Squires and Demetrion (1992) and Moore (2003).
It was reranked as Agnocardia by Dockery (1982), Vokes (1984), Todd (2001) and Sepkoski (2002); it was Bucardium (Agnocardia) by Schneider (2002); it was Acanthocardia (Agnocardia) by Squires and Demetrion (1992) and Moore (2003).
It was assigned to Trachycardium by Vokes (1939); to Cardiinae by Dockery (1982) and Vokes (1984); to Cardiidae by Todd (2001); to Orthocardiinae by Schneider (2002); to Veneroida by Sepkoski (2002); and to Acanthocardia by Squires and Demetrion (1992) and Moore (2003).
Subtaxa
Agnocardia acrocome, Agnocardia alternata, Agnocardia cinderellae, Agnocardia claibornense, Agnocardia convexa, Agnocardia cossmanni, Agnocardia dissidepictum, Agnocardia elnaggari, Agnocardia glebosum, Agnocardia machaporiensis, Agnocardia mahgoobi, Agnocardia mokattamensis, Agnocardia pessoae, Agnocardia rectispina, Agnocardia sorrentoensis, Agnocardia spinosifrons, Agnocardia thalassium
Species lacking formal opinion data
Synonymy list
| Year | Name and author |
|---|---|
| 1930 | Trachycardium (Agnocardia) Stewart pp. 264 - 265 |
| 1939 | Trachycardium (Agnocardia) Vokes p. 76 |
| 1982 | Agnocardia Dockery p. 69 |
| 1984 | Agnocardia Vokes p. 43 |
| 1992 | Acanthocardia (Agnocardia) Squires and Demetrion p. 42 |
| 2001 | Agnocardia Todd |
| 2002 | Bucardium (Agnocardia) Schneider p. 351 figs. Figure 25 |
| 2002 | Agnocardia Sepkoski |
| 2003 | Acanthocardia (Agnocardia) Moore |
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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.
Subg. †Acanthocardia (Agnocardia) Stewart 1930
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†Agnocardia acrocome Dall 1900
†Agnocardia alternata Hubbard 1920
†Agnocardia cinderellae Maury 1917
†Agnocardia claibornense Aldrich 1911
†Agnocardia convexa Deshayes 1858
†Agnocardia cossmanni Vincent 1882
†Agnocardia dissidepictum Woodring 1925
†Agnocardia elnaggari Abbass 1972
†Agnocardia glebosum Conrad 1848
†Agnocardia machaporiensis Maury 1925
Agnocardia mahgoobi Abbass 1972
Agnocardia mokattamensis Abbass 1972
†Agnocardia pessoae Maury 1925
†Agnocardia rectispina Koenen 1893
†Agnocardia sorrentoensis Hanna 1927
†Agnocardia spinosifrons Vokes 1984
†Agnocardia thalassium Maury 1925
Diagnosis
No diagnoses are available