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Clitambonites schmidti
Taxonomy
Orthisina schmidti was named by Pahlen (1877).
It was recombined as Clitambonites schmidti by Vinn and Spjeldnæs (2000) and Popov et al. (2001).
It was recombined as Clitambonites schmidti by Vinn and Spjeldnæs (2000) and Popov et al. (2001).
Subspecies
Sister species lacking formal opinion data
Synonymy list
| Year | Name and author |
|---|---|
| 1877 | Orthisina schmidti Pahlen p. 23 figs. pl. 2, figs. 5 ,6,7-9 |
| 2000 | Clitambonites schmidti Vinn and Spjeldnæs p. 284 figs. 61-J |
| 2001 | Clitambonites schmidti Popov et al. pp. Table 12 |
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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.
†Clitambonites schmidti Pahlen 1877
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†Clitambonites schmidti epigonus Opik 1934
†Clitambonites schmidti septatus Opik 1934
†Clitambonites schmidti schmidti Alikhova 1953
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Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| O. Vinn and N. Spjeldnæs 2000 | Ventral valve transversely semielliptical in outline, convex in the lateral profile, with the maximum width about at mid-length of the valve. Cardinal extremities obtuse, the anterior margin rounded, commissure rectimarginate. Costellae of equal size, evenly spaced. Concentric growth lamellae, preserved on anterior of the specimen (PMO 1 62.093), forming a well-developed imbricate sculpture.
Ventral interarea short relative to length, flat and apsacline. Delthyrium as wide as long, less than half covered by convex deltidium. Foramen is not clearly observable in any specimen studied, possibly very small, sealed and entirely apical. Ventral interior with wide, shallow spondylium, gently elevated anteriorly, supported medianly by short wide septum. |