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Erlianhyus
Taxonomy
Species
Synonymy list
| Year | Name and author |
|---|---|
| 2022 | Erlianhyus Li and Li |
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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.
Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| Q. Li and Q. Li 2022 | Medium or medium to small-sized and bunodont
artiodactyl; upper molars more quadratic with a reduced paraconule somewhat shifted mesially, no hypocone and styles on M1-3, weak cristae between main cones, P4 with more rounded outline, a protocone smaller and lower than paracone on P4, and double- rooted P2. Differs from the entelodontids in having a smaller para- conule and in lacking a hypocone. Differs from other primitive and small bunodont artiodactyls such as the bunodont diacodexeids, dichobunoids, homacodontids, leptochoerids, cebochoerids, helohyids and raoellids in having the following combination of upper molar characteristics: trapezoid outline, a small paraconule, a metaconule as large as the paracone and metacone, no hypocone, no styles, a wide trigon basin, an incomplete centrocrista, a weak or absent crista between the cones, a distinct cingulum that is only absent at the lingual base of the protocone. Differs from the primitive anthracotheriids inthe Key Laboratory of Vertebrate Evolution and Human Origins of the Chinese Academy of Sciences, IVPP. The graphic processing was done using the VGstudio Max 2.1 software (Volume Graphics). Systematic palaeontology Order Artiodactyla Owen, 1848 Family incertae sedis Erlianhyus gen. nov. Type Species: Erlianhyus primitivus, the only species in the genus. Etymology: ‘Erlian’, the larger geographical area that includes the type locality; ‘hyus’, a suffix used in many bunodont artiodactyl genus names. Diagnosis: Medium or medium to small-sized and bunodont artiodactyl; upper molars more quadratic with a reduced paraconule somewhat shifted mesially, no hypocone and styles on M1-3, weak cristae between main cones, P4 with more rounded outline, a protocone smaller and lower than paracone on P4, and double- rooted P2. Differs from the entelodontids in having a smaller para- conule and in lacking a hypocone. Differs from other primitive and small bunodont artiodactyls such as the bunodont diacodexeids, dichobunoids, homacodontids, leptochoerids, cebochoerids, helohyids and raoellids in having the following combination of upper molar characteristics: trapezoid outline, a small paraconule, a metaconule as large as the paracone and metacone, no hypocone, no styles, a wide trigon basin, an incomplete centrocrista, a weak or absent crista between the cones, a distinct cingulum that is only absent at the lingual base of the protocone. Differs from the primitive anthracotheriids in having a more lingually positioned metaconule on M1-3, lacking a slight degree of selenodonty on the protocone and metaconule, and lacking developed ectoloph and centrocrista on the upper molar. Differs from the primitive suoids in having a small paraconule and a well-developed metaconule, having more distinct lingual cingu- lum and in lacking a hypocone. |
Measurements
No measurements are available
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| Source: o = order, subc = subclass, c = class, subp = subphylum | |||||
| References: Lillegraven 1979, Nowak 1999, Hendy et al. 2009, Carroll 1988 | |||||
Age range: Middle Eocene or 47.80000 to 37.71000 Ma
Collections: one only
| Time interval | Ma | Country or state | Original ID and collection number |
|---|---|---|---|
| Middle Eocene | China (Nei Mongol) | E. primitivus (174722) |