首页|Postnatal ontogenetic size and shape changes in the craniums of plateau pika and woolly hare (Mammalia: Lagomorpha)

Postnatal ontogenetic size and shape changes in the craniums of plateau pika and woolly hare (Mammalia: Lagomorpha)

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In the present study,postnatal ontogenetic size and shape changes in the cranium of two lagomorph species,the plateau pika (Ochotona curzoniae) and woolly hare (Lepus oiostolus),were investigated by geometric morphometrics.The ontogenetic size and shape changes of their cranium exhibited different growth patterns in response to similar environmental pressures on the Qinghai-Tibetan Plateau.The overall size change in the cranium of the plateau pika was slower than that of the woolly hare.The percentage of ontogenetic shape variance explained by size in the woolly hare was greater than that in the plateau pika.The overall shape of the cranium was narrowed in both species,and morphological components in relation to neural maturity showed negative allometry,while those responsible for muscular development showed isometric or positive allometry.The most remarkable shape variations in the plateau pika were associated with food acquisition (temporalis development),though other remarkable shape variations in the incisive and palatal foramen in the ventral view were also observed.The most important shape change in the woolly hare was demonstrated by the elongation of the nasal bones,expansion of the supra-orbital process and shape variation of the neurocranium.

OntogenyGeometric morphometricsAllometryCranial morphologyLagomorpha

Zhi-Gui ZHANG、De-Yan GE

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Leshan Vocational and Technical College, Leshan, Sichuan 614099, China

Key Laboratory of Zoological Systematics and Evolution, Institute of Zoology, Chinese Academy of Sciences, Beijing 100101, China

This project was partially supported by a grantKey Laboratory of the Zoological Systematics and Evolution of the Chinese Academy of Sciences and the National Science Found

Y229YX510531101629

2014

10.13918/j.issn.2095-8137.2014.4.287

动物学研究
中国科学院昆明动物研究所 中国动物学会

动物学研究

CSTPCDCSCD
影响因子：0.582
ISSN：0254-5853
年,卷(期)：2014.35(4)
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