Postcranial skeleton of Eocene Leptictidae (Mammalia), and its implications for behavior and relationships
作者： Kenneth D. Rose
DOI: 10.1080/02724634.1999.10011147
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摘要: ABSTRACT The postcranial skeleton of early and middle Eocene leptictids is described based on several specimens from Wyoming Colorado. Leptictids had a strongly keeled manubrium sterni, relatively short, generalized forelimbs (intermembral index ~60), moderately robust humerus, stout metacarpals, ungual phalanges resembling those fossorial mammals. femur slender, with narrow, elevated patellar trochlea posteriorly-directed lesser trochanter. slightly longer tibia firmly synostosed the fibula just distal to midshaft. fused tibiofibula forms stable ankle joint deep astragalar trochlea. neck metatarsals are elongate, there pronounced peroneal process Mt I, probably related pedal eversion. These traits indicate that were terrestrial mammals progressed by quadrupedal walking, running, hopping (possibly bipedally at high speed), burrowed using their forelimbs. Cladistic analysis o...
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