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|Morphology||Ecology and taphonomy||External Literature Search||Age range and collections|
Mammalia - Zhangheotheriidae
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. W. Rougier et al. 2003||Zhangheotherids include Zhangheotherium and Maotherium, and they are medium sized symmetrodonts. The last uppet and lower premolars are molariform, with at least five cusps although forming a very broad triangle rather than the more acute trigod trigonid of the molars. The upper canines are doublerooted, reduced in size and not trenchant, approximately of the same height except the last incisor. The upper molariforms and last premolar have a welldeveloped, cuspidated, lingual cingulum in Maotherium, but they are short in Zhangheotherium. Large cusp B, cingular cusps e and d are tall and well separated from the rest of the crown. Four or more mental foramina are present. The coronoid process is long and narrow, inclining posteriorly at an angle of approximately 40 degrees. The condylar process is long, dorsally directed, and separated from the coronoid process by a deep notch that extends ventrally to the level of the alveolar margin or below.|