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Tessarolax
Taxonomy
Tessarolax was named by Gabb (1864) [Sepkoski's age data: K Haut K Maes-l Sepkoski's reference number: 909,1074]. Its type is Tessarolax distorta.
It was reranked as Aporrhais (Tessarolax) by Wollemann (1912).
It was assigned to Aporrhais by Wollemann (1912); to Neotaenioglossa by Sepkoski (2002); to Pugnellinae by Kollmann (2009); and to Aporrhainae by Saul and Squires (2015).
It was reranked as Aporrhais (Tessarolax) by Wollemann (1912).
It was assigned to Aporrhais by Wollemann (1912); to Neotaenioglossa by Sepkoski (2002); to Pugnellinae by Kollmann (2009); and to Aporrhainae by Saul and Squires (2015).
Species
Species lacking formal opinion data
Synonymy list
| Year | Name and author |
|---|---|
| 1864 | Tessarolax Gabb p. 126 |
| 1912 | Aporrhais (Tessarolax) Wollemann |
| 2002 | Tessarolax Sepkoski |
| 2009 | Tessarolax Kollmann p. 54 |
| 2015 | Tessarolax Saul and Squires pp. 42 - 45 |
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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. †Tessarolax Gabb 1864
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†Aporrhais (Tessarolax) ebrayi Pchelintsev 1926
†Tessarolax alaskana Saul and Squires 2015
†Tessarolax bicarinata Deshayes in Leymerie 1842
†Tessarolax bullardi Saul and Squires 2015
†Tessarolax distorta Gabb 1864
†Tessarolax gabbi Saul and Squires 2015
†Tessarolax grahami Saul and Squires 2015
Tessarolax inconspicua Gabb 1869
†Tessarolax incrustata Anderson and Hanna 1935
†Tessarolax louellae Saul and Squires 2015
†Tessarolax retusa Sowerby 1836
†Tessarolax teleos Saul and Squires 2015
†Tessarolax trinalis Murphy and Rodda 1960
Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| L. R. Saul and R. L. Squires 2015 | Mature shell with four, long, curved, unbranched, widely spaced, unflanged, canaliculate (internally channeled) digitations: three extending from outer lip and one engulfing rostrum. Apical digitation considerably exceeds height of spire and extends from apical corner of aperture on outer lip side of shell, angles across spire, and leaves spire near tip on a trajectory away from substrate (both this digitation and its adjoining apical-tip area became encrusted in Late Cretaceous). Posterior and anterior outer lip digitations represent continuous extensions of posterior and anterior carinae of last whorl; ventral side of latter digitation with localized callus knob on post–early Coniacian species. Rostral digitation engulfs rostrum and becomes very elongate; spiral ornamentation predominates. |