Lekaneleo | |
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Scientific classification ![]() | |
Domain: | Eukaryota |
Kingdom: | Animalia |
Phylum: | Chordata |
Class: | Mammalia |
Infraclass: | Marsupialia |
Order: | Diprotodontia |
Family: | † Thylacoleonidae |
Genus: | † Lekaneleo Gillespie, Archer & Hand, 2020 |
Type species | |
†Lekaneleo roskellyae Gillespie, 1997 | |
Other species | |
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Synonyms | |
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Lekaneleo is a fossil genus of carnivorous marsupial that existed during the early Miocene in Australia. Once allied to the type species of the genus Priscileo, later placed as Wakaleo pitikantensis , "Priscileo" roskellyae was subsequently transferred to its own genus Lekaneleo. [2]
The species was described by Anna Gillespie in 1997, describing material excavated at the Riversleigh World Heritage Area that included a largely complete cranium and maxillary retaining some teeth and details of the alveoli. Examination of the new species included a revision of the previously monotypic genus, Priscileo, known only by fragmented remains of teeth and a partial maxilla. The discovery of a new species of Riversleigh fauna allowed the genus to be revised (Gillespie, et al, 2017) to include the type to be recognised in the new combination as Wakaleo pitikantensis . [3] Subsequently Gillespie, Archer & Hand (2020) moved "Priscileo" roskellyae to a distinct genus Lekaneleo, arguing that it exhibits features supporting its generic distinction within Thylacoleonidae. [4] The specific epithet honours Ros Kelly, who provided support to research at Riversleigh when acting as a minister of the federal government. [2]
As one of two described species of Priscileo, it is estimated to have been around two thirds the size of Priscileo pitikantensis ; [2] the body mass of L. roskellyae is calculated as 2.7 kilograms (6.0 lb). [5] The upper dental formula of this marsupial was I1–3 C1 P1–13 M 1–4. The premolar P3 is similar in form to the larger tooth in species of Wakaleo , the mid-sized thylacoleonids that also existed at Riversleigh and seemed to occupy different ecological niches in the same time period. [2]
The comparative bite force of the species, along with the larger Thylacoleo carnifex , is estimated to have been the greatest of any known mammal and strongly supports the conception of predators that killed animals larger than itself. [5] The conception of the larger species 'P. pitikantensis, based on extrapolations from the limb morphology, is proposed to have been an arboreal ambush predator. [2]