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Ptychomya densicostata
Taxonomy
Ptychomya densicostata was named by Nagao (1934).
Synonymy list
| Year | Name and author |
|---|---|
| 1934 | Ptychomya densicostata Nagao p. 224 figs. XXVIII (VI), Fig. 4. |
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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.
†Ptychomya densicostata Nagao 1934
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Diagnosis
No diagnoses are available
Measurements
No measurements are available
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| Source: g = genus, f = family, superf = superfamily | |||||
| References: Eames 1951, Aberhan et al. 2004, Sanchez Roig 1926 | |||||
Collections (7 total)
| Time interval | Ma | Country or state | Original ID and collection number |
|---|---|---|---|
| Neocomian | Japan (Wakayama) | Ptychomya densicostata (40659) | |
| Neocomian | Japan (Iwate) | Ptychomya densicostata (39982) | |
| Neocomian | Japan (Gumma) | Ptychomya densicostata (40488) | |
| Aptian | Japan (Iwate) | Ptychomya densicostata (40553) | |
| Late/Upper Aptian | Mexico (Baja California) | Ptychomya densicostata (1878) | |
| Albian | Japan (Kumamoto) | Ptychomya densicostata (40469 40601) |