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Taxonomy
Gansuyaena was named by Galiano et al. (2022) [Small-sized hyaenids with a combination of plesiomorphically hypertrophied bullae, low cheek dentition crown height, and reduced m1 trigonid root relative to the m1 talonid root.].
It was assigned to Protelinae by Galiano et al. (2022).
It was assigned to Protelinae by Galiano et al. (2022).
Species
Synonymy list
| Year | Name and author |
|---|---|
| 2022 | Gansuyaena Galiano 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. †Gansuyaena Galiano et al. 2022
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†Gansuyaena guerini Villalta and Crusafont Pairo 1945
†Gansuyaena megalotis Galiano et al. 2022
Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| H. Galiano et al. 2022 | Gansuyaena shares with all hyaenids a skull proportioned with rostrum
length greater than basicranial length (length of cranium from approximately the posterior edge of the palate to the occipital condyle). This genus shares with all hyaenids, except Proteles, the unique character complex for P4/p4 and m1: P4 parastyle large with secondary shearing notch, protocone positioned anteriorly, m1 paraconid and entoconid enlarged, with talonid displaying a U-shaped catch notch. Also present is a divided bulla with a horizontal septum and an alisphenoid canal. Autapomorphies characterizing Gansuyaena include infraorbital foramen opening wider than in other hyaenids; bulla hypertrophic, ectotympanic and crista tympanica extraordinarily large; and auditory meatus enlarged and positioned in center of bulla. It differs from Plioviverrops and Proteles in having a single mental foramen on each hemimandible. Features shared with Plioviverrops, and Proteles include moderate rostral expansion of frontal sinuses; wrinkled surface enamel absent; canines laterally compressed and with crowns not shortened in contrast to rounded in cross-sectional shape, robust, and proportionately short canines in hyaenines. It differs from Plioviverrops and Mesoviverrops in its less mesocarnivorous dentition, low crowned carnassials, and reduced basal cingula on M1. It differs from Ictitherium in lacking the p4 cingular cusp and having a proportionately larger P1. Finally, P4 protocone in Gansuyaena is proportionately more slender than that of Plioviverrops orbignyi and Mesoviverrops gaudryi. |
Measurements
No measurements are available
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| Source: f = family, subc = subclass, c = class, subp = subphylum | |||||
| References: Lillegraven 1979, Ji et al. 2002, Nowak 1991, Carroll 1988, Hendy et al. 2009 | |||||