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Taxonomy
Simomactra was named by Dall (1894). It is extant.
It was assigned to Mactrinae by Coan et al. (2000), Moore (2003); and to Mactridae by Coan and Valentich-Scott (2012), Hickman (2015).
It was assigned to Mactrinae by Coan et al. (2000), Moore (2003); and to Mactridae by Coan and Valentich-Scott (2012), Hickman (2015).
Species
Synonyms
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Synonymy list
| Year | Name and author |
|---|---|
| 1894 | Simomactra Dall |
| 1916 | Spisula (Symmorphomactra) Packard p. 297 |
| 1925 | Spisula (Symmorphomactra) Oldroyd p. 8 |
| 2000 | Simomactra Coan et al. p. 458 |
| 2002 | Symmorphomactra Sepkoski |
| 2003 | Simomactra Moore |
| 2012 | Simomactra Coan and Valentich-Scott p. 554 |
| 2015 | Simomactra Hickman p. 32 |
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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. Simomactra Dall 1894
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Simomactra dolabriformis Conrad 1867 [hatchet surfclam]
Simomactra falcata Gould 1850 [hooked surfclam]
†Simomactra falcata brioniana Trask 1922
Simomactra planulata Conrad 1837 [flat surfclam]
Invalid names: Symmorphomactra [synonym]
Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| E. L. Packard 1916 (Spisula (Symmorphomactra)) | Cardinals prominent, thin, posterior arm of the cardinal tooth overhangs the chondophore; accessories on each arm; hinge plate flat. |