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Timorhynchia
Taxonomy
Timorhynchia was named by Ager (1968) [Sepkoski's age data: Tr Ladi Tr Nori-l Sepkoski's reference number: 1068]. Its type is Halorella nimassica.
It was assigned to Cyclothyridinae by Ager (1968), Williams et al. (2002); and to Rhynchonellida by Sepkoski (2002).
It was assigned to Cyclothyridinae by Ager (1968), Williams et al. (2002); and to Rhynchonellida by Sepkoski (2002).
Species
Synonymy list
| Year | Name and author |
|---|---|
| 1968 | Timorhynchia Ager pp. 58 - 59 figs. Pl. 1, figs. 5a-c |
| 2002 | Timorhynchia Sepkoski |
| 2002 | Timorhynchia Williams et al. p. 1337 |
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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. †Timorhynchia Ager 1968
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†Timorhynchia gowanensis MacFarlan 1992
†Timorhynchia nimassica Krumbeck 1924
†Timorhynchia sulcata Jin et al. 1979
†Timorhynchia trigona Sun 1981
†Timorhynchia waikawauensis MacFarlan 1992
Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| D. Ager 1968 | Small, depressed rhynchonellids, laterally oval to subtrigonal in outline; equivalve to almost plano-convex, dorsal valve characteristically flattened posteriorly. Low square uniplication, little or no fold, multicostate throughout growth. Beak small, incurved, submesothyrid.
Wide delthyrial cavity, massive teeth. Long thin dorsal median septum supporting short septalium, gutter-shaped crura projecting into the ventral valve. The name follows the custom among rhynchonelloid workers of appending " rhynchia " to the name of the country of origin (e.g. Burmirhynchia, Russirhynchia, Somalirhynchia, A ustrirhynchia). It is probable that several other described Triassic species also belong here, but their internal structures have not yet been described. |
Measurements
| part | N | mean | minimum | maximum | median | s.d. | |
|---|---|---|---|---|---|---|---|
| shell height | 15 | 8.09 | 3.20 | 19.4 | 7.30 | 5.89 |
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| Source: o = order, c = class, p = phylum, uc = unranked clade | |||||
| References: Nesnidal et al. 2013, Aberhan et al. 2004 | |||||
Collections (18 total)
| Time interval | Ma | Country or state | Original ID and collection number |
|---|---|---|---|
| Ladinian | New Zealand | T. sp. A (135264) | |
| Late/Upper Triassic | Indonesia (Timor) | Rhynchonella nimassica (205320) | |
| Oretian | New Zealand | T. gowanensis (134638 134774) T. sp. B (135051) T. waikawauensis (134268 134269 134875 135294) | |
| Lacian | China (Yunnan) | T. nimassica, T. sulcata (132565) | |
| Norian | Indonesia (Timor) | Halorella nimassica (205278 205450 205495) Rhynchonella nimassica (205463 205471) | |
| Norian | China (Xizang) | T. nimassica (44345) | |
| Otamitan | New Zealand | T. sp. B (135059) | |
| Alaunian | China (Xizang) | T. nimassica, T. trigona (132640) |