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Oxostrophomena dubia
Taxonomy
Strophomena dubia was named by Rukavishnikova (1956). Its type specimen is IGNA103/1369, a shell (conjoined valves), and it is a 3D body fossil. It is the type species of Oxostrophomena.
It was recombined as Oxostrophomena dubia by Nikitina et al. (2006).
It was recombined as Oxostrophomena dubia by Nikitina et al. (2006).
Synonymy list
| Year | Name and author |
|---|---|
| 1956 | Strophomena dubia Rukavishnikova p. 143 figs. pl. 4, figs 1–2; pl. 9, figs. 2–8 |
| 2006 | Oxostrophomena dubia Nikitina et al. p. 173 figs. 20.6–9; 21 |
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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.
†Oxostrophomena dubia Rukavishnikova 1956
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Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| O. I. Nikitina et al. 2006 | Shell convexoconcave, strongly geniculated ventrally; ventral interarea apsacline with a pseudodeltidium; dorsal interarea orthocline to slightly apsacline with discrete chilidial plates; radial ornament parvicostellate, posterior area of both valves covered by irregular concentric rugellae. Ventral interior with large striated teeth and long divergent dental plates, muscle field small, elongate, suboval in outline, with diductor scars extended beyond but not enclosing narrow adductor scars. Dorsal interior with a bilobed cardinal process situated on a narrow triangular notothyrial platform; socket ridges very short, straight, blade-like with a striated posterior surface, divergent anteriorly; sockets small semi-conical; muscle field small, divided by a broad median ridge and with posterior adductors larger then anterior scars; dorsal mantle canals saccate. |
Measurements
No measurements are available
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| Source: f = family, o = order, c = class, p = phylum, uc = unranked clade | |||||
| References: Hendy 2009, Aberhan et al. 2004, Nesnidal et al. 2013 | |||||
Age range: Abereiddian or 468.00000 to 461.10000 Ma
Collections (4 total)
| Time interval | Ma | Country or state | Original ID and collection number |
|---|---|---|---|
| Abereiddian | Kazakhstan | Oxostrophomena dubia (165482 165486 165487 165544) |