Fig. 5From: Oldest ctenodactyloid tarsals from the Eocene of China and evolution of locomotor adaptations in early rodentsResults of principal component analysis of 15 calcaneal (a) and 12 astragalar (b) measurements for 19 species. A set of lines connecting all data points represents a minimum spanning tree based on a Euclidean distance matrix. Results support Tamquammys robustus as an agile terrestrial ecomorph and T. wilsoni as a non-specialized occasionally arboreal species. Species abbreviations: A.te, Arvicola terrestris; C.cr, Cricetus cricetus; C.lu, Cynomys ludovicianus; G.el, Gomphos elkema; G.gl, Glis glis; M.ma, Marmota marmota; M.mu, Mus musculus; O.pa, Ochotona pallasi; O.zi, Ondatra zibethicus; Par., paramyid; P.sp., Paramys sp.; Pur., Purgatorius; R.no, Rattus norvegicus; S.da, Sciurotamias davidianus; S.vu, Sciurus vulgaris; T.gl, Tupaia glis; T.mi, Tribosphenomys minutus; T.ro, Tamquammys robustus; T.wi, Tamquammys wilsoni. AS, Arshantan ALMA; IM, Irdinmanhan ALMABack to article page