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Sairadelphys
Taxonomy
Sairadelphys was named by Oliveira et al. (2011). Its type is Sairadelphys tocantinensis.
It was assigned to Hyladelphinae by Oliveira et al. (2011).
It was assigned to Hyladelphinae by Oliveira et al. (2011).
Species
S. tocantinensis (type species)
Synonymy list
| Year | Name and author |
|---|---|
| 2011 | Sairadelphys Oliveira et al. |
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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. †Sairadelphys Oliveira et al. 2011
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†Sairadelphys tocantinensis Oliveira et al. 2011
Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| E. V. Oliveira et al. 2011 | Very small didelphid, with slightly larger size than Hyladelphys. Relatively low crowned molars. M3 with similarly sized paracone and metacone. Stylar cusps are reduced in number and size. Paracone and metacone have convex labial faces. Upper molars not strongly carnassialized (i.e. postmetacristae are only slightly longer than postprotocristae) and postprotocrista are without a carnassial notch. M2 subequal to slightly larger than M3. First lower molar with well-developed prefossid. Differs from Hyladelphys in having a slightly larger size, more inflate and sharpless teeth, deeper ectoflexus in M2, no size difference between paracone and metacone in M2-3, protocone eccentric and very low, absence of anterior cingulum, stronger reduction in number and size of stylar cusps and smaller M4. |
Measurements
No measurements are available
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| Source: f = family, subc = subclass, c = class, subp = subphylum | |||||
| References: Hendy et al. 2009, Carroll 1988, Lillegraven 1979, Nowak 1991 | |||||
Age range: Late/Upper Pleistocene or 0.12900 to 0.01170 Ma
Collections: one only
| Time interval | Ma | Country or state | Original ID and collection number |
|---|---|---|---|
| Late/Upper Pleistocene | Brazil (Tocantins) | S. tocantinensis (149493) |