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Mendacella sola
Taxonomy
Orthis sola was named by Billings (1866). It is a 3D body fossil. Its type locality is Battery Point, east of the Salmon River, which is in a Richmondian carbonate mudstone/lime mudstone in the Vaureal Formation of Canada.
It was recombined as Rhipidomella sola by Twenhofel (1928); it was recombined as Mendacella sola by Jin and Zhan (2008).
It was recombined as Rhipidomella sola by Twenhofel (1928); it was recombined as Mendacella sola by Jin and Zhan (2008).
Sister species lacking formal opinion data
Synonymy list
| Year | Name and author |
|---|---|
| 1866 | Orthis sola Billings p. 12 |
| 1928 | Rhipidomella sola Twenhofel p. 181 figs. pl. 17 figs. 10, 11. |
| 2008 | Mendacella sola Jin and Zhan p. 49 figs. Pl. 30, figs. 1-7 |
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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.
†Mendacella sola Billings 1866
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Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| J. Jin and R. Zhan 2008 | Shell small, subcircular, ventribiconvex, with length of 9.3 mm, width 10.1 mm, and thickness 5.2 mm, widest at about midlength of shell (Fig. 12.1–12.5). Hinge line straight, about two-thirds width of shell; cardinal extremities rounded. Ventral umbo of moderate height and convexity, narrow, rostrate, with dorsally curved beak; ventral interarea moderately high, apsacline, with longitudinally curved surface; delthyrium open, of typical dalmanellid shape and outline. Dorsal umbo about half-height of ventral umbo; dorsal interarea weakly anacline to nearly orthocline. Fold or sulcus absent, but medial part of ventral valve slightly raised, and that of dorsal valve slightly depressed. Anterior margin nearly rectimarginate. Costellae relatively coarse for genus, increasing anteriorly by unequal bifurcation (rarely by intercalation), with subsequent orders of costellae inserted usually on medial side slope of costae or costaellae; capillae well developed, usually one per interspace; aditicules prominent, single-columned along rib crest; punctae fine, of typical dalmanelloid type, arranged in reticular pattern (Fig. 12.6–12.10). |