Abstract
Arctostylopids are common in Late Palaeocene and Early Eocene mammal faunas of Asia, but they are rare in North America. From the time of their first discovery, arctostylopids were grouped with the strictly endemic South American Notoungulata based on their strikingly similar dental morphology. This relationship was challenged based on dental morphology of more recently discovered arctostylopids and on supposed tarsal morphology (based on unassociated material) of the Asian arctostylopid Palaeostylops. Therefore, Arctostylopidae were placed in a separate order, Arctostylopida, of enigmatic affinities. Many authors, however, continue to unite Arctostylopidae and Notoungulata based on dental similarities. In the Late Palaeocene Subeng site in Inner Mongolia, we identified the Palaeostylops tarsals based on their size and abundance. This identification is supported by comparison to unpublished Arctostylops tarsals from the North American Clarkforkian, derived from a semi-articulated skeleton also including dental material. Tarsal morphology shows moderate similarity to the gliriform Pseudictops, and strong resemblance to the tarsally conservative gliroid Rhombomylus. Hence, Arctostylopidae may best be grouped with Asian non-gliroid Gliriformes, which we interpret as having dispersed into North America in the Late Palaeocene.
References
Asher RJ, Meng J, Wible JR, McKenna MC, Rougier GW, Dashzeveg D, Novacek MJ (2005) Stem Lagomorpha and the antiquity of Glires. Nature 307:1091–1094
Beard KC (1998) East of Eden: Asia as an important center of taxonomic origination in mammalian evolution. Bull Carnegie Mus Nat Hist 34:5–39
Bergqvist LP (1996) Reassociação do pós-crânio às espécies de ungulados da bacia de S. J. de Itaboraí (Paleoceno), Estado do Rio de Janeiro, e filogenia dos “Condylarthra” e ungulados sul-americanos com base no pós-crânio. Ph.D. Thesis, Universidade Federal do Rio Grande do Sul, Brazil, p 407
Bleefeld AR, McKenna MC (1985) Skeletal integrity of Mimolagus rodens (Lagomorpha, Mammalia). Am Mus Novit 2806:1–5
Bloch JI (1999) Partial skeleton of Arctostylops from the Paleocene of Wyoming: arctostylopid–notoungulate relationship revisited. J Vertebr Paleontol 19:32A
Cifelli RL (1983a) The origin and affinities of the South American Condylarthra and Early Tertiary Litopterna (Mammalia). Am Mus Novit 2772:1–49
Cifelli RL (1983b) Eutherian tarsals from the late Paleocene of Brazil. Am Mus Nov 2761:1–31
Cifelli RL (1993) The phylogeny of the native South American ungulates. In: Szalay FS, Novacek MJ, McKenna MC (eds) Mammal phylogeny placentals. Springer, Berlin Heidelberg New York, pp 195–216
Cifelli RL, Schaff CR, McKenna MC (1989) The relationships of the Arctostylopidae (Mammalia): new data and interpretation. Bull Mus Comp Zool 152:1–44
Gingerich PD (1985) South American mammals in the Paleocene of North America. In: Stehli FG, Webb SD (eds) The great American biotic interchange. Plenum, New York, pp 123–137
Kondrashov PE, Lucas SG (2004) Palaeostylops iturus from the Upper Paleocene of Mongolia and the status of Arctostylopida (Mammalia, Eutheria). New Mex Mus Natl Hist Sci Bull 26:195–203
Matthew WD (1915) A revision of the lower Eocene Wasatch and Wind River faunas. Part IV. Entelonychia, Primates, and Insectivora (part). Bull Am Mus Nat Hist 34:429–483
Matthew WD, Granger W (1925) Fauna and correlation of the Gashato Formation of Mongolia. Am Mus Nov 189:1–12
Meng J, Hu Y, Li C (2003) The osteology of Rhombomylus (Mammalia, Glires): implications for phylogeny and evolution of Glires. Bull Am Mus Nat Hist 275:1–247
Missiaen P, Smith T (2005) A new nyctitheriid insectivore from Inner Mongolia (China) and its implications for the origin of the Asian nyctitheriids. Acta Palaeont Pol 50:513–522
Patterson B, Pascual R (1972) The fossil mammal fauna of South America. In: Keast A, Erk FC, Glass BP (eds) Evolution, mammals and southern continents. State University of New York Press, Albany, New York, pp 247–309
Schlosser M (1923) Säugetiere. In: Broili F, Schlosser M (eds) Grundzüge der Paläontologie (Paläozoologie) II. Abt: Vertebrata, neubeart. MR Oldenbourg, Munich, pp 402–689
Smith T, Van Itterbeeck J, Missiaen P (2004) Oldest Plesiadapiform (Mammalia, Proprimates) of Asia and its paleobiogeographical implication with North America. CR Palevol 3:43–52
Sulimski A (1968) Paleocene genus Pseudictops Matthew, Granger and Simpson 1929 (Mammalia) and its revision. Palaeontol Pol 19:101–129
Szalay FS (1977) Phylogenetic relationships and a classification of the eutherian Mammalia. In: Hecht MK, Goody PC, Hecht BM (eds) Major patterns in vertebrate evolution. Plenum, New York, pp 315–374
Szalay FS (1985) Rodent and lagomorph morphotype adaptations, origins and relationships: some postcranial attributes analyzed. In: Luckett WP, Hartenberger JL (eds) Evolutionary relationships among rodents: a multidisciplinary analysis. Plenum, New York, pp 83–132
Tabuce R, Telles Antunes M, Smith R, Smith T (2006) Dental variability and tarsal morphology of the European Paleocene/Eocene mammal Microhyus. Acta Palaeontol Pol 51:37–52
Ting S (1998) Paleocene and early Eocene land mammal ages of Asia. Bull Carnegie Mus Nat Hist 34:124–147
Wyss AR, Meng J (1996) Application of phylogenetic taxonomy to poorly resolved crown clades: a stem-modified node-based definition of Rodentia. Syst Biol 45:559–568
Zack SP (2004) An early Eocene Arctostylopid (Mammalia: Arctostylopida) from the Green River Basin, Wyoming. J Vertebr Paleontol 24:498–501
Acknowledgements
The authors thank Christian de Muizon (MNHN, France), Peter Kondrashov (NMSU, USA) and Lilian Bergqvist (UFRJ, Brazil) for the discussions and access to reference materials. At the RBINS, Julien Cillis produced the SEM micrographs, and Stephane Berton prepared the drawings. This work was financially supported by projects MO/36/011 and BL/36/C12 of the Belgian Federal Science Policy Office (TS) and by the RF-Flanders (PM).
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Pieter Missiaen is an aspirant of the Research Foundation-Flanders (RF-Flanders)
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Missiaen, P., Smith, T., Guo, DY. et al. Asian gliriform origin for arctostylopid mammals. Naturwissenschaften 93, 407–411 (2006). https://doi.org/10.1007/s00114-006-0122-1
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DOI: https://doi.org/10.1007/s00114-006-0122-1