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Dyskritodon
Taxonomy
Dyskritodon was named by Sigogneau-Russell (1995). Its type is Dyskritodon amazighi.
It was assigned to Triconodonta by Sigogneau-Russell (1995), Prasad and Manhas (2002); and to Eutriconodonta by Kielan-Jaworowska et al. (2004).
It was assigned to Triconodonta by Sigogneau-Russell (1995), Prasad and Manhas (2002); and to Eutriconodonta by Kielan-Jaworowska et al. (2004).
Species
D. amazighi (type species), D. indicus
Synonymy list
| Year | Name and author |
|---|---|
| 1995 | Dyskritodon Sigogneau-Russell p. 154 |
| 2002 | Dyskritodon Prasad and Manhas p. 446 |
| 2004 | Dyskritodon Kielan-Jaworowska et al. pp. 219, 234-235 fig. 7.10A |
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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. †Dyskritodon Sigogneau-Russell 1995
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†Dyskritodon amazighi Sigogneau-Russell 1995
†Dyskritodon indicus Prasad and Manhas 2002
Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| D. Sigogneau-Russell 1995 | Last molar with high and narrow crown, with cusps a, c, d, decreasing regularly in height posteriorly; differs from all Triconodonta except Morganucodontidae by cusp b displaced lingually and included in the cingulum; differs from all Triconodonta by anterior notch displaced labially with presence of a cuspule f, a cuspule not present in any other Triconodonta. | |
| G. V. R. Prasad and B. K. Manhas 2002 | Lower molars with high and narrow crown and a cusp formula of a > c > d > b; cusps a, c, d decreasing regularly in height posteriorly; the posterior crests of a and c are slightly longer than the anterior ones; cusps a and c with swollen labial bases; b as a small cusp; differs from all known triconodonts in the cusp formula; differs from all triconodonts except Gobiconodon Trofimov, 1978 and Dinnetherium Jenkins, Crompton & Downs, 1983 in the presence of anterior notch between e and f; differs from all triconodonts with the exception of Morganucodon Kühne, 1949 in having a very small cusp b. |
Measurements
No measurements are available
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| Source: c = class, subp = subphylum, p = phylum, uc = unranked clade | |||||
| References: Kiessling 2004, Hopson 1973, Carroll 1988, Luo et al. 2003 | |||||
Age range: base of the Toarcian to the top of the Early/Lower Berriasian or 184.20000 to 141.00000 Ma
Collections (2 total)
| Time interval | Ma | Country or state | Original ID and collection number |
|---|---|---|---|
| Toarcian - Aalenian | India (Andhra Pradesh) | D. indicus (39673) | |
| Late/Upper Tithonian - Early/Lower Berriasian | Morocco (Oriental) | D. amazighi (45726) |