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Ptychagnostus (Ptychagnostus)
Taxonomy
Ptychagnostus (Ptychagnostus) was named by Jaekel (1909).
It was assigned to Ptychagnostus by Jaekel (1909) and Westrop et al. (1996).
It was assigned to Ptychagnostus by Jaekel (1909) and Westrop et al. (1996).
Synonymy list
Year | Name and author |
---|---|
1909 | Ptychagnostus (Ptychagnostus) Jaekel |
1996 | Ptychagnostus (Ptychagnostus) Westrop et al. p. 819 |
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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. †Ptychagnostus (Ptychagnostus) Jaekel 1909
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Diagnosis
No diagnoses are available
Measurements
No measurements are available
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Source: subg = subgenus, g = genus, f = family | |||||
Reference: Hendy 2009 |
Age range: Middle Cambrian or 509.00000 to 497.00000 Ma
Collections: one only
Time interval | Ma | Country or state | Original ID and collection number |
---|---|---|---|
Middle Cambrian | USA (Alaska) | Ptychagnostus puncturosus (64765) |