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Taxonomy
Leptobolus ovalis was named by Bassler (1919) [Leptobolus ? ovalis
Lectotype designated by Cooper (1956)]. Its type specimen is USNM 66171a, a shell, and it is a 3D body fossil. It is the type species of Elliptoglossa.
It was recombined as Elliptoglossa ovalis by Cooper (1956) and Hansen and Holmer (2011).
It was recombined as Elliptoglossa ovalis by Cooper (1956) and Hansen and Holmer (2011).
Sister species lacking formal opinion data
Synonymy list
| Year | Name and author |
|---|---|
| 1919 | Leptobolus ovalis Bassler p. 230 figs. pi. 49, figs. 14-16 |
| 1956 | Elliptoglossa ovalis Cooper pp. 242 - 244 figs. Plate 23, E, figures 14-26 |
| 2011 | Elliptoglossa ovalis Hansen and Holmer |
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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.
†Elliptoglossa ovalis Bassler 1919
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Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| G. A. Cooper 1956 | Shell small, longitudinally oval in outline with the posterior margin slightly narrower than the anterior margin. Anterior and posterior margins narrowly rounded. Maximum width at the middle. Sides moderately curved. Valves marked by even, concentric lines.
Pedicle valve evenly and broadly convex in lateral profile with the maximum convexity located at the middle; anterior profile narrowly convex. Valve swollen medianly, with steep lateral slopes but a more gentle anterior slope. Apical angle 90° to 100°. Posterior slope long and gentle. Umbo small, short, narrowly swollen. Brachial valve somewhat more rounded than the pedicle valve and less convex in anterior and lateral profiles. Inner border of both valves fairly wide, but widest at the posterior. |
Measurements
No measurements are available
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| Source: g = genus, f = family, o = order, c = class, uc = unranked clade | |||||
| References: Nesnidal et al. 2013, Aberhan et al. 2004, Hendy et al. 2009, Hendy 2009 | |||||