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Trionyx jixiensis
Taxonomy
Trionyx jixiensis was named by Li et al. (2015). Its type specimen is GMH H2008JI20, a carapace (carapace), and it is a 3D body fossil. Its type locality is Yufeng Village, which is in an Aptian/Albian terrestrial siliciclastic in the Chengzihe Formation of China.
Sister species lacking formal opinion data
Synonymy list
| Year | Name and author |
|---|---|
| 2015 | Trionyx jixiensis Li et al. p. 156 fig. 2 |
| 2017 | Trionyx jixiensis Georgalis and Joyce |
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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.
†Trionyx jixiensis Li et al. 2015
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Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| L. Li et al. 2015 | A trionychine of moderate size, with a bony carapace length of 216 mm. Characterized by the following combination of features: 1) nuchal emargination weak; 2) width of the nuchal
about 3.5 times of its length; 3) suprascapular fontanelles absent; 4) preneural absent; 5) eight neurals, 6) fifth neural tetragonal; 7) eight pairs of costals, 8) first costals with parallel anterior and posterior borders; 9) eighth pair of costals large and 10) meeting at the midline posterior to the eighth neural. Differs from all other Cretaceous trionychines by character 2. Additionally differs from Perochelys lamadongensis by characters 3, 9e10; differs from “Trionyx” kansaiensis by character 1; differs from Gobiapalone spp. by characters 3, 8e9; differs from “T.” dissolutus and “Aspideretes” maortuensis by character 3, 6 and 9; differs from “T.” shiluutulensis by characters 4, 6, 8e9 and differs from Aspideretoides riabinini by characters 3e5 and 9. See Table 2 for further differences between “Trionyx” jixiensis and other Cretaceous trionychids |
Measurements
No measurements are available
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| Source: f = family, subp = subphylum | |||||
| References: Carroll 1988, Ernst and Barbour 1989 | |||||
Collections: one only
| Time interval | Ma | Country or state | Original ID and collection number |
|---|---|---|---|
| Aptian - Albian | China (Heilongjiang) | Trionyx jixiensis (type locality: 169467) |