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Cassidulus (Rhynchopygus)
Taxonomy
Rhynchopygus was named by d'Orbigny (1856) [Sepkoski's age data: K Ceno R Sepkoski's reference number: 577]. It is extant.
It was reranked as Cassidulus (Rhynchopygus) by Clark and Twitchell (1915) and Kew (1920).
It was assigned to Cassidulus by Clark and Twitchell (1915) and Kew (1920); to Cassidulidae by Grant and Hertlein (1938), Kier (1962) and Kier (1966); to Cassiduloida by Sepkoski (2002); and to Faujasiidae by Holmes (2004).
It was reranked as Cassidulus (Rhynchopygus) by Clark and Twitchell (1915) and Kew (1920).
It was assigned to Cassidulus by Clark and Twitchell (1915) and Kew (1920); to Cassidulidae by Grant and Hertlein (1938), Kier (1962) and Kier (1966); to Cassiduloida by Sepkoski (2002); and to Faujasiidae by Holmes (2004).
Subtaxa
Species lacking formal opinion data
Synonymy list
| Year | Name and author |
|---|---|
| 1856 | Rhynchopygus d'Orbigny |
| 1915 | Cassidulus (Rhynchopygus) Clark and Twitchell p. 140 |
| 1920 | Cassidulus (Rhynchopygus) Kew p. 138 |
| 1938 | Rhynchopygus Grant and Hertlein p. 109 |
| 1962 | Rhynchopygus Kier p. 159 |
| 1966 | Rhynchopygus Kier p. U515 |
| 2002 | Rhynchopygus Sepkoski |
| 2004 | Rhynchopygus Holmes p. 210 |
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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.
Subg. Cassidulus (Rhynchopygus) d'Orbigny 1856
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†Cassidulus (Rhynchopygus) californicus Anderson 1905
†Cassidulus (Rhynchopygus) depressus Clark and Twitchell 1915
†Cassidulus (Rhynchopygus) evergladensis Mansfield 1932
†Cassidulus (Rhynchopygus) mexicanus Kew 1920
†Cassidulus (Rhynchopygus) ynezensis Kew 1920
†Rhynchopygus arumaensis Kier 1972
†Rhynchopygus lapiscancri Leske 1778
Rhynchopygus marmini Agassiz 1847
†Rhynchopygus peruvianus Brighton 1926
Diagnosis
No diagnoses are available