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Pseudovaugonia
Taxonomy
Pseudovaugonia was named by Echevarría et al. (2021). Its type is Vaugonia hectorleanzai.
It was assigned to Myophorellidae by Echevarría et al. (2021); and to Bivalvia by Foote et al. (2024).
It was assigned to Myophorellidae by Echevarría et al. (2021); and to Bivalvia by Foote et al. (2024).
Species
Synonymy list
| Year | Name and author |
|---|---|
| 2021 | Pseudovaugonia Echevarría et al. pp. 28 - 31 |
| 2024 | Pseudvaugonia Foote et al. pp. Appendix 2 |
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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. †Pseudovaugonia Echevarría et al. 2021
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†Pseudovaugonia hectorleanzai Pérez et al. 2008
†Pseudovaugonia oregonensis Poulton 1979
†Pseudovaugonia vancouverensis Poulton 1976
Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| J. Echevarría et al. 2021 | Elongate, opisthogyrate shell; with slightly protruding carinae at early growth stages, rounded angulations at late growth stages. Escutcheon slightly depressed, smooth. Area with fine commarginal costellae, usually densely spaced; costellae wavy or irregular at late growth stages. Sub-median groove developed on the area. Antecarinal space barely developed or absent. Flank with oblique costae, in three sets: posterior one subparallel, anteroventrally sloping and orthogonal to marginal angulation; medium set sub-horizontal to slightly anterodorsally directed; anterior set short and orthogonal to anterior margin. Posterior and median sets of costae meeting towards mid-flank; median and anterior sets of costae meeting along a radial anterior line. Anterior and median sets of costae replaced by thin commarginal costae at late growth stages. Flank costae (especially the posterior set) with small, irregular tubercles, sometimes barely developed or fading away. |
Measurements
| part | N | mean | |||||
|---|---|---|---|---|---|---|---|
| articulated specimen height | 1 | 28.0 | |||||
| valve height | 1 | 24.0 |
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| Source: o = order, c = class | |||||
| Reference: Aberhan et al. 2004 | |||||
Age range: base of the Obtusum to the top of the Early/Lower Toarcian or 199.50000 to 182.90000 Ma
Collections (9 total)
| Time interval | Ma | Country or state | Original ID and collection number |
|---|---|---|---|
| Late/Upper Sinemurian | Canada (British Columbia) | Vaugonia oregonensis (53871) | |
| Obtusum | Chile | Vaugonia hectorleanzai (95082) | |
| Sinemurian | USA (Nevada) | Vaugonia vancouverensis (139744) | |
| Late/Upper Pliensbachian | USA (Oregon) | Vaugonia oregonensis (125760 139226 139736 139737) | |
| Early/Lower Toarcian | Chile | Vaugonia hectorleanzai (95113) | |
| Falciferum | Chile | Vaugonia hectorleanzai (95111) |