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Pentagnostus praecurrens
Taxonomy
Agnostus gibbus praecurrens was named by Westergård (1936). It is not extant.
It was recombined as Triplagnostus praecurrens by Bognibova (1965); it was recombined as Ptychagnostus praecurrens by Robison (1982); it was recombined as Agnostus praecurrens by Westrop et al. (1996); it was recombined as Pentagnostus praecurrens by Laurie (2004) and Naimark and Pegel (2017).
It was recombined as Triplagnostus praecurrens by Bognibova (1965); it was recombined as Ptychagnostus praecurrens by Robison (1982); it was recombined as Agnostus praecurrens by Westrop et al. (1996); it was recombined as Pentagnostus praecurrens by Laurie (2004) and Naimark and Pegel (2017).
Sister species lacking formal opinion data
Synonymy list
| Year | Name and author |
|---|---|
| 1936 | Agnostus gibbus praecurrens Westergard |
| 1936 | Agnostus gibbus praecurrens Westergård pp. 29 - 30 figs. pl. 1, figs 19-23 |
| 1965 | Triplagnostus praecurrens Bognibova pp. 63-64 figs. pl. 1, figs 13-16 |
| 1982 | Ptychagnostus praecurrens Robison |
| 1996 | Agnostus praecurrens Westrop et al. p. 812 |
| 2004 | Pentagnostus praecurrens Laurie |
| 2017 | Pentagnostus praecurrens 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.
†Pentagnostus praecurrens Westergård 1936
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Diagnosis
No diagnoses are available
Measurements
No measurements are available
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| Source: f = family, superf = superfamily | |||||
| References: Hendy 2009, Robison 1994 | |||||
Collections (30 total)
| Time interval | Ma | Country or state | Original ID and collection number |
|---|---|---|---|
| Delamaran | Canada (British Columbia) | Ptychagnostus praecurrens (84412 84413 84415 84416 84417 84418 84419 84420 84421 84422 84423 84424 84425 84426 84427 84428 84429 84430 84431 84432 84433 84434 84435 84436 84437) | |
| Amgan | Kazakhstan | Pentagnostus praecurrens (9970) | |
| Middle Cambrian | Canada (British Columbia) | Ptychagnostus praecurrens (171309) | |
| St Davids | Canada (British Columbia) | Ptychagnostus praecurrens (122094) | |
| Tuesaian | Kazakhstan | Pentagnostus praecurrens (118054 118085) |