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Polyrhizodus
Taxonomy
Polyrhizodus was named by M'Coy (1848) [Sepkoski's age data: C Ms]. It is not extant.
It was assigned to Janassidae by Jordan (1963); to Petalodontida by Zangerl (1981), Sepkoski (2002); and to Petalodontidae by Woodward (1889), Hay (1902), Lund (1983), Lund (1989), Ginter et al. (2010).
It was assigned to Janassidae by Jordan (1963); to Petalodontida by Zangerl (1981), Sepkoski (2002); and to Petalodontidae by Woodward (1889), Hay (1902), Lund (1983), Lund (1989), Ginter et al. (2010).
Species
P. attenuatus, P. carbonarius, P. colei, P. concavus, P. dentatus, P. digitatus (syn. P. lobatus, P. williamsi, P. amplus, P. excavatus, P. littoni, P. princeps), P. elongatus, P. inflexus, P. latus, P. magnus, P. minimus, P. modestus, P. nanus, P. piasaensis, P. ponticulus, P. porosus, P. pusillus, P. rectus, P. truncatus
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.
G. †Polyrhizodus M'Coy 1848
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†Polyrhizodus attenuatus Davis 1883
†Polyrhizodus carbonarius Saint John and Worthen 1875
†Polyrhizodus colei Davis 1883
†Polyrhizodus concavus Trautschold 1874
†Polyrhizodus dentatus Newberry and Worthen 1866
†Polyrhizodus digitatus Leidy 1857
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Invalid names: Polyrhizodus amplus St. John and Worthen 1875 [synonym], Polyrhizodus excavatus Saint John and Worthen 1866 [synonym], Polyrhizodus littoni Newberry and Worthen 1870 [synonym], Polyrhizodus lobatus Newberry and Worthen 1866 [synonym], Polyrhizodus princeps Newberry and Worthen 1866 [synonym], Polyrhizodus williamsi St. John and Worthen 1875 [synonym]
†Polyrhizodus elongatus Davis 1883
†Polyrhizodus inflexus Newberry and Worthen 1866
†Polyrhizodus latus Newberry 1897
†Polyrhizodus magnus M'Coy 1848
†Polyrhizodus minimus Saint John and Worthen 1875
†Polyrhizodus modestus Newberry 1875
†Polyrhizodus nanus Saint John and Worthen 1875
†Polyrhizodus piasaensis Saint John and Worthen 1875
†Polyrhizodus ponticulus Newberry and Worthen 1866
†Polyrhizodus porosus Newberry and Worthen 1866
†Polyrhizodus pusillus M'Coy 1848
†Polyrhizodus rectus Newberry 1897
†Polyrhizodus truncatus Newberry and Worthen 1870
Diagnosis
No diagnoses are available