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Sinbadelphys schmidti
Taxonomy
Sinbadelphys schmidti was named by Cifelli (2004). Its type specimen is OMNH 26451, a tooth (left M2 lacking protocone), and it is a 3D body fossil. It is the type species of Sinbadelphys.
Synonymy list
| Year | Name and author |
|---|---|
| 2004 | Sinbadelphys schmidti Cifelli p. 67 figs. 5.4-5.5 |
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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.
†Sinbadelphys schmidti Cifelli 2004
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Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| R. L. Cifelli 2004 | Small marsupial characterized mainly by plesiomorphies with respect to other members of the cohort; molars structurally similar to those of Kokopellia. Differs from Pappotherium and Holoclemensia in: upper molars with protocone better developed, both anteroposteriorly and labiolingually; conules better developed, with strong internal cristae; lesser height differential between paracone and metacone; and variable extension of postprotocrista past base of metacone; lower molars with lesser height differential between trigonid and talonid, broader talonid, labial postcingulid present, entoconid lingually placed (presumed apomorphies). Differs from Kokopellia in smaller size and in having: upper molars with weaker, less cuspate rim on stylar shelf; deeper ectoflexus; paracone and metacone of more nearly equal height; protocone less transversely developed; lower molars with entoconid lingually placed and relatively taller. Differs from Adelodelphys in larger size and in having: upper molars with bases of paracone and metacone not as tightly joined, protocone better developed transversely, stylocone larger and more robust; M3 with relatively broader distal stylar shelf and postmetacrista that is longer and directed more obliquely (i.e., less transversely oriented); lower molars with subequal paraconid and metaconid; stronger labial postcingulid; and entoconid that is much better developed, trenchant and bladelike (not cuspate), and more distinctly joined to hypoconulid. Differs from Anchistodelphys in having upper molars with more anteroposteriorly compressed protocone, deeper ectoflexus, and parastyle projecting more labially (based on M3 only). Differs from most or all Late Cretaceous Marsupialia in relatively lingual position of conules (about halfway between protocone and paracone–metacone, not adjacent to bases of respective latter two cusps) and hyperextension of internal conule cristae, which commonly extend up from the bases of paracone and metacone to form lingual keels on those cusps. |
Measurements
No measurements are available
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| Source: subc = subclass, c = class, subp = subphylum | |||||
| References: Lillegraven 1979, Hopson 1973, Hendy et al. 2009, Clemens 1979, Carroll 1988 | |||||
Age range: Early/Lower Cenomanian or 99.60000 to 93.50000 Ma
Collections (7 total)
| Time interval | Ma | Country or state | Original ID and collection number |
|---|---|---|---|
| Early/Lower Cenomanian | USA (Utah) | Sinbadelphys schmidti (14395 14396 14398 14399 14403 14405 200123) |