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Tritropidoceras
Taxonomy
Tritropidoceras was named by Schenk (1935) [Sepkoski's age data: Tr Carn-u Sepkoski's reference number: 302]. Its type is Tritropidoceras packardi.
It was assigned to Tropiceltitidae by Spath (1951); to Tropitidae by Schenk (1935) and Tozer (1981); and to Ceratitida by Sepkoski (2002).
It was assigned to Tropiceltitidae by Spath (1951); to Tropitidae by Schenk (1935) and Tozer (1981); and to Ceratitida by Sepkoski (2002).
Species
T. packardi (type species)
Synonymy list
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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.
Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| E. T. Schenk 1935 | s.7-Form evolute, widely umbilicate, whorls slightly embracing. Width of volution almost equal to height. Surface with numer- ous nodose ribs which trend toward the aperture after crossing the ventral shoulder. Venter flattened with a high keel bounded by deep furrows on either side. Secondary keels present on the outer margins of the furrows. Septa weakly ammonitic with divided ventral lobe and with two laterals. |