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Aphelakardia
Taxonomy
Aphelakardia was named by Hoare (1990) [Sepkoski's age data: C Tour-l C Tour-u]. Its type is Conocardium alternistriatum.
It was assigned to Hippocardiidae by Lane et al. (1973) and Hoare (1990); to Conocardiidae by Quiroz-Barroso et al. (2000); and to Conocardioida by Sepkoski (2002).
It was assigned to Hippocardiidae by Lane et al. (1973) and Hoare (1990); to Conocardiidae by Quiroz-Barroso et al. (2000); and to Conocardioida by Sepkoski (2002).
Species
Synonymy list
| Year | Name and author |
|---|---|
| 1973 | Aphelakardia Lane et al. |
| 1990 | Aphelakardia Hoare pp. 727 - 728 figs. 2.11-2.23 |
| 2000 | Aphelakardia Quiroz-Barroso et al. |
| 2002 | Aphelakardia Sepkoski |
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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.
G. †Aphelakardia Hoare 1990
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†Aphelakardia alternistriata Herrick 1888
†Aphelakardia indianense Miller 1891
Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| R. D. Hoare 1990 | Conocardiid with smooth outer shell layer on body; flattened to concave posterior rostral face; posterior ventral orifice and dorsal rostral clefts present; two longitudinal shelves in snout.
Aphelakardia differs from other Conocardiacea by the lack of radial ribs in the outer shell layer on the body portion of the shell, with the exception of the genus Arceodomus Pojeta and Runnegar (1976). Arceodomus lacks a posterior ventral orifice, has a convexly produced posterior rostral face, lacks dorsal rostral clefts, and is significantly more elongate in form, giving a greater length/width ratio than Aphelakardia. |