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Pentagnostus
Taxonomy
Pentagnostus was named by Lermontova (1940) [Sepkoski's age data: Cm lMid Cm mMid-u]. It is not extant.
It was synonymized subjectively with Ptychagnostus by Jell and Adrain (2002).
It was assigned to Ptychagnostidae by Whittington et al. (1997); to Agnostida by Sepkoski (2002); and to Peronopsidae by Naimark and Pegel (2017).
It was synonymized subjectively with Ptychagnostus by Jell and Adrain (2002).
It was assigned to Ptychagnostidae by Whittington et al. (1997); to Agnostida by Sepkoski (2002); and to Peronopsidae by Naimark and Pegel (2017).
Species
Species lacking formal opinion data
Synonymy list
| Year | Name and author |
|---|---|
| 1940 | Pentagnostus Lermontova |
| 1997 | Pentagnostus Whittington et al. p. 354 |
| 2002 | Pentagnostus Sepkoski |
| 2017 | Pentagnostus Naimark and Pegel p. 1186 |
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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. †Pentagnostus Lermontova 1940
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Subg. †Pentagnostus (Meragnostus) Naimark 2012
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†Pentagnostus (Meragnostus) segmenta Robison 1964
†Pentagnostus admirabilis Ergaliev and Ergaliev 2008
†Pentagnostus anabarensis Lermontova 1940
†Pentagnostus brighamensis Resser 1939
†Pentagnostus endemicus Ergaliev and Ergaliev 2008
†Pentagnostus krusei Laurie 2006
†Pentagnostus praecurrens Westergård 1936
†Pentagnostus shabaktensis Ergaliev and Ergaliev 2008
†Pentagnostus shergoldi Laurie 2004
Diagnosis
No diagnoses are available