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By W. Patrick Luckett (auth.), W. Patrick Luckett (eds.)

Tree shrews are small-bodied, scansorial, squirrel-like mammals that occupy a variety of arboreal, semi-arboreal, and woodland ground niches in Southeast Asia and adjoining islands. Comparative elements of tree shrew biology were the topic of in depth investigations in the past twenty years. those reports have been initiated partly end result of the largely approved trust that tupaiids are primitive primates, and, as such, could offer priceless perception into the evolutionary foundation of complicated styles of primate habit, locomotion, neurobiology, and copy. throughout the comparable interval, there was a renewed curiosity within the technique of phylogenetic reconstruction and within the use of information from numerous organic disciplines to check or formulate hypotheses of evolutionary relationships. specifically, curiosity within the com­ parative and systematic biology of mammals has interested in research of phy­ logenetic relationships between Primates and a look for their closest kinfolk. review of the prospective primate affinities of tree shrews has comprised an enormous a part of those reviews, and a large amount of dental, cranio­ skeletal, neuroanatomical, reproductive, developmental, and molecular evi­ dence has been marshalled to both corroborate or refute hypotheses of a different tupaiid-primate dating. those contrasting viewpoints have re­ sulted from differing interpretations of the fundamental info, in addition to replacement ways to the evolutionary research of data.

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D'Souza, F. 1974. A preliminary field report of the lesser tree shrew Tupaia minor, pp. 167-182. In R. D. Martin, G. A. Doyle, and A. C. ). Prosimian Biology. , London. Evans, F. G. 1942. The osteology and relationships of the elephant shrews (Macroscelididae). Bull. Amer. Mus. Nat. Hist. 80: 85-125. Fiedler, W. 1956. Ubersicht tiber das System der Primates, pp. 1-266. In H. Hofer, A. H. Schultz, and D. ). tologia, Vol. 1. S. Karger, Basel. Goodman, M. 1975. Protein sequence and immunological specificity: Their role in phylogenetic studies of primates, pp.

As a result of his studies, Van Valen concluded that most, if not all, similarities of the skull and dentition between tu paiids and extant primates are the result of shared primitive retentions or convergent evolution. This hypothesis has been corroborated by character analyses of numerous soft anatomical features (Figs. 5, 8), in particular, the nervous system (Campbell, 1966, 1974, this volume), reproductive systems (Martin, 1968a, 1968b, 1975), placentation (Hill, 1965; Luckett, 1969, 1974), and myology (Campbell, 1974).

1978. ]. Compo Neur. 182: 517-554. Kaudern, W. 1911. Studien tiber die m,fnnlichen Geschlechtsorgane von Insectivoren und Lemuriden. Zool. Jahrb. 31: 1-106. Leche, W. 1885. Uber die Sa:ugethiergattung Galeopithecus. Kongl. t. Akad. Handl. 21: 192. Le Gros Clark, W. E. 1924a. The myology of the tree-shrew (Tupaia minor). Proc. Zoo I. Soc. Lond. 1924: 461-497. Le Gros Clark, W. E. 1924b. On the brain of the tree-shrew (Tupaia minor). ProC. Zool. Soc. Lond. 1924: 1053-1074. Le Gros Clark, W. E. 1925.

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