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Alleinacin sulcata
Taxonomy
Astarte sulcata was named by Packard (1922). Its type specimen is UCMP 12305 and is a 3D body fossil. It is the type species of Alleinacin.
It was replaced with Astarte earllergyi by Anderson (1958); it was recombined as Alleinacin sulcata by Squires and Ritterbush (1981).
It was replaced with Astarte earllergyi by Anderson (1958); it was recombined as Alleinacin sulcata by Squires and Ritterbush (1981).
Synonymy list
| Year | Name and author |
|---|---|
| 1922 | Astarte sulcata Packard p. 424 figs. Plate 33, figure 6 |
| 1937 | Astarte sulcata Popenoe p. 386 figs. Plate 46, figures 5-8 |
| 1981 | Alleinacin sulcata Squires and Ritterbush p. 897 |
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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.
†Alleinacin sulcata Packard 1922
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Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| E. L. Packard 1922 | Shell very small, slightly quadrate in outline. Anterior and posterior dorsal margins with similar slopes; posterior end slightly truncated; beaks small, pointed, situated nearly central. Surface covered with a few heavy steplike concentric ridges, which are about half as wide as the interspaces . Length of
type, 10 mm.; heigh t, 7 mm.; convexity, about 2 mm. | |
| W. P. Popenoe 1937 | The following notes are added to the original description of this species: Lunule and escutcheon both well-marked, rather broad, long, unsculptured; ligament short, small, inserted in a narrow trough; dentition of the right valve, one strong trigonal posterior tooth immediately beneath the beaks, and one very small laminar anterior tooth directed obliquely toward the ventral anterior border and situated close up under the lunule; dentition of the left value, one strong central trigonal cardinal; dorsal anterior margin of right valve and dorsal posterior margin of left valve fit into long, narrow and shallow grooves on the corresponding margins of the opposite valves; pallial line simple; internal margins of the valves smooth. | |
| R. L. Squires and L. Ritterbush 1981 | As for genus. |