Two possibly aqatic triconodont mammals from the Early Cretaceous of Marocco
作者： D Sigogneau-Russell
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摘要: Three mammalian molars from the Early Cretaceous of Morocco reveal existence, a t that time, two new and peculiar species, one them assigned to Eotheria Triconodonta (uncertain family), Dyskritodon arnazighi gen. et sp. n., second only tentatively Triconodonta, Ichthyoconodon jawor o w s k m n. The former is represented by last lower molar which three main cusps (a, c, d) decrease regularly in size posteriorly while cusp b very small lingually situated, unique condition for post-Liassic triconodonts. taxon (two specimens) characterized narrow trenchant teeth not intermeshing with adjacent ones, carrying subequal (b, , c). Such dental morphology suggests these mammals might have been semi-aquatic piscivorous.
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