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Trigonia hemisphaerica
Taxonomy
Trigonia hemisphaerica was named by Lycett (1877). It is not extant.
Sister species lacking formal opinion data
T. aliformis, T. bella, T. brevicostata, T. carinata, T. clavigera, T. conradi, T. corderoi, T. costata, T. crebraecostata, T. elongata, T. guadalupae, T. kenti, T. kidugalloensis, T. leckenbyi, T. libanotica, T. literata, T. loutfyi, T. migeodi, T. mollesensis, T. proelanza, T. prora, T. stelzneri, T. tenuis, T. trafalgarensis, T. kuchensis, T. elongata, T. nitida, T. tumida
Synonymy list
| Year | Name and author |
|---|---|
| 1877 | Trigonia hemisphaerica Lycett p. 174 figs. Pl. 31.4-8, Pl. 33.3-6 |
| 1879 | Trigonia hemisphaerica Lycett p. 174 figs. 31.4-8, 33.4-6 |
| 1916 | Trigonia hemisphaerica Douvillé p. 29 figs. Pl. 4, Fig. 9 |
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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.
†Trigonia hemisphaerica Lycett 1877
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Diagnosis
No diagnoses are available
Measurements
No measurements are available
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| Source: o = order, c = class | |||||
| Reference: Aberhan et al. 2004 | |||||
Age range: base of the Sinemurian to the top of the Bajocian or 199.30000 to 168.30000 Ma
Collections (4 total)
| Time interval | Ma | Country or state | Original ID and collection number |
|---|---|---|---|
| Sinemurian | USA (Nevada) | Trigonia hemisphaerica (139744) | |
| Opalinum | Russian Federation | Trigonia hemisphaerica (137341) | |
| Bajocian | USA (California) | Trigonia hemisphaerica (139298) | |
| Bajocian | Egypt | Trigonia hemisphaerica (170870) |