Phylogeny of Multituberculata

  • Nancy B. Simmons
Chapter

Overview

Despite the importance of multituberculates as major components of many Mesozoic and early Tertiary faunas, the evolutionary relationships among these mammals have remained poorly understood. To address this issue, a cladistic analysis of relationships among forty-nine multituberculate taxa was conducted using dental and cranial characters. This analysis resulted in a strict consensus tree with a resolution of 66%. The relatively low level of resolution in this tree seems largely to be a result of including incompletely known taxa in the analysis. Sequential addition analyses (in which taxa were added to the analysis in order of decreasing completeness) indicated that even the most incomplete taxa preserve information important for understanding multituberculate relationships. Sequentially deleting such taxa provided a method for testing the stability of observed clades.

Based on the hypothesis of relationships presented in this study, Plagiaulacoidea is recognized as a paraphyletic group composed of several lineages of primitive multituberculates. Ptilodontoidea appears to form a monophyletic group if Boffius and Liotomus are removed to Taeniolabidoidea. Although support for the group is somewhat ambiguous, Taeniolabidoidea may also be monophyletic, provided that Eobaatar and Monobaatar are removed. Members of Cimolomyidae all appear to belong to various lineages within Taeniolabidoidea. Ptilodontoidea and Taeniolabidoidea together constitute a more inclusive monophyletic group, Cimolodonta McKenna, 1975.

The hypotheses of phylogeny presented in this study provide a framework within which evolution of multituberculate morphology can be studied. Results of the current analyses indicate that while cusp numbers and tooth size often vary in direct relationship to one another, these aspects of tooth morphology were not tightly coupled in any lineage during multituberculate evolution. As suggested by Krause and Carlson (1987), “gigantoprismatic” enamel appears to have evolved only once in multituberculates, within derived “plagiaulacoids” ancestral to Cimolodonta. In contrast, small prismatic enamel apparently evolved three times—once in late Cretaceous ptilodontoids and twice in late Paleocene taeniolabidoids. Fully restricted enamel on the lower incisors, long thought to be limited to taeniolabidoids, seems to have evolved once in “plagiaulacoids” and several times in taeniolabidoids. Partial restriction of the enamel appears to be diagnostic for Taeniolabidoidea.

Keywords

Migration Europe Flare Cretaceous Expense 

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References

  1. Archibald, J.D. 1982. A study of Mammalia and geology across the Cretaceous-Tertiary boundary in Garfield County, Montana. Univ. California Publ., Geol. Sciences 122:1–286.Google Scholar
  2. Carlson, S.J., and Krause, D.W. 1985. Enamel ultrastructure of multituberculate mammals: An investigation of variability. Contrib. Mus. Paleo., Univ. Michigan 27:1–50.Google Scholar
  3. Clemens, W.A., and Kielan-Jaworowska, Z. 1979. Multituberculata. In: Mesozoic mammals: The first two-thirds of mammalian history (Lillegraven, J.A., Kielan-Jaworowska, Z., and Clemens, W.A., eds.). Berkeley: University of California Press, pp. 99–149.Google Scholar
  4. Cole, T.M., and Krause, D.W. 1988. Interspecific relationships between tooth size and cusp numbers in the Multituberculata (Mammalia). J.Vert. Paleo. 8(3):12A.Google Scholar
  5. Donoghue, M.J., Doyle, J.A., Gauthier, J., Kluge, A.G., and Rowe, T. 1989. The importance of fossils in phylogeny reconstruction. Ann. Rev. Ecol. Syst. 20:431–446.CrossRefGoogle Scholar
  6. Engelmann, G.F., Greenwald, N.S., Callison, G., and Chure, D.J. 1990. Cranial and dental morphology of a late Jurassic multituberculate mammal from the Morrison Formation. J. Vert. Paleo. 10 (3):22A.Google Scholar
  7. Fosse, G., Kielan-Jaworowska, Z., and Skaale, S.G. 1985. The microstructure of tooth enamel in multituberculate mammals. Palaeont. 28:435–449.Google Scholar
  8. Gauthier, J., Kluge, A.G., and Rowe, T. 1988. Amniote phylogeny and the importance of fossils. Cladistics, 4:105–209.CrossRefGoogle Scholar
  9. Granger, W., and Simpson, G.G. 1929. A revision of the Tertiary Multituberculata. Bull. Amer. Mus. Nat. Hist. 56:601–676.Google Scholar
  10. Greenwald, N.S. 1988. Patterns of tooth eruption and replacement in multituberculate mammals. J. Vert. Paleo 8:265–277CrossRefGoogle Scholar
  11. Greenwald, N.S. 1989a. Phylogeny and systematics of multituberculate mammals. Ph.D. Dissertation, University of California, Berkeley.Google Scholar
  12. Greenwald, N.S. 1989b, Effects of missing data and homo-plasy on estimates of multituberculate phylogeny. J. Vert. Paleo. 9 (3):24A.Google Scholar
  13. Hahn, G. 1969. Beitrage zur Fauna der Grube Guimarota Nr. 3, die Multituberculata. Palaeontographica, Abt. A 133:1–100.Google Scholar
  14. Hahn, G. 1977. Neue Schadel-Reste von Multituberculaten aus dem Malm Portugals. Geol et Palaeo. 11:161–186.Google Scholar
  15. Hahn, G. 1978. Neue Unterkiefer von Multituberculaten aus dem Malm Portugals. Geol. et Palaeo. 12:177–212.Google Scholar
  16. Hahn, G. 1988. Die Ohr-region der Paulchoffatiidae (Multituberculata, Ober-Jura). Palaeovert. 18:155–185.Google Scholar
  17. Hahn, G., and Hahn, R. 1983. Multituberculata. Fossilium Catalogus 1: Animalia 127:1–409.Google Scholar
  18. Hahn, G., Sigogneau-Russell, D., and Wouters, G. 1989. New data on Theroteinidae—Their relations with Paulchoffatiidae and Haramiyidae. Geol et Palaeont. 23:205–215.Google Scholar
  19. Jepsen, G.L. 1940. Paleocene faunas of the Polecat Bench Formation, Park County, Wyoming. Proc. Amer. Phil. Soc. 83:217–340.Google Scholar
  20. Kielan-Jaworowska, Z. 1974. Migrations of the Multituberculata and the late Cretaceous connections between Asia and North America. Ann. S. Afr. Mus. 64:231–243.Google Scholar
  21. Kielan-Jaworowska, Z., Dashzeveg, D., and Trofimov, B. 1987. Early Cretaceous multituberculates from Mongolia and a comparison with late Jurassic forms. Acta Palaeont. Polonica 32:3–47.Google Scholar
  22. Krause, D.W., and Carlson, S.J. 1987. Prismatic enamel in multituberculate mammals: Tests of homology and polarity. J. Mammalogy 68:755–765.CrossRefGoogle Scholar
  23. Maddison, W.P., Donoghue, M.J., and Maddison, D.R. 1984. Outgroup analysis and parsimony. Syst. Zool. 33:83–103.CrossRefGoogle Scholar
  24. Marsh, O.T. 1889. Discovery of Cretaceous mammals. Part II. Amer. J. Sci., Ser. 3, 38:177–180.Google Scholar
  25. McKenna, M.C. 1975. Toward a phylogenetic classification of the Mammalia. In: Phylogeny of the primates (Luckett, W.P., and Szalay, F.S., eds.) New York: Plenum Press, pp. 21–46.Google Scholar
  26. Miao, D. 1988. Skull morphology of Lambdopsalis bulla (Mammalia, Multituberculata) and its implications to mammalian evolution. Cont. to Geol, Univ. Wyoming, Special Paper 4:1–104.Google Scholar
  27. Novacek, M.J. 1989. Higher mammal phylogeny: The morphological-molecular synthesis. In: The hierarchy of life (Fernholm, B., Bremer, K., and Jornwall, H., eds.). New York: Elsevier Science Publications, pp. 421–435.Google Scholar
  28. Novacek, M.J., Wyss, A.R., and McKenna, M.C. 1988. The major groups of eutherian mammals. In:The phylogeny and classification of the tetrapods, vol 2: The mammals (Benton, M.J., ed.), Systematics Association Special Volume 35B, pp. 31–71. Oxford: Clarendon Press.Google Scholar
  29. Osborn, H.F. 1887. The structure and classification of the Mesozoic Mammalia. J. Acad. Nat. Sci. Philadelphia 9:186–265.Google Scholar
  30. Rohlf, F.J. 1982. Consensus indices for comparing classifications. Mathematical Biosciences 59:131–144.CrossRefGoogle Scholar
  31. Rowe, T. 1986. Osteological diagnosis of Mammalia, L. 1758, and its relationship to extinct Synapsida. Ph.D. Dissertation, University of California, Berkeley.Google Scholar
  32. Rowe, T. 1988. Definition, diagnosis and origin of Mammalia. J. Vert. Paleo. 8:241–264.CrossRefGoogle Scholar
  33. Rowe, T., and Greenwald, N.S. 1987. The phylogenetic position and origin of Multituberculata. J. Vert. Paleo. 7:24A-25A.CrossRefGoogle Scholar
  34. Sanderson, M.J., and Donoghue M.J. 1989. Patterns of variation in levels of homoplasy. Evolution 43:1781–1795.CrossRefGoogle Scholar
  35. Simpson, G.G. 1928. A catalogue of the Mesozoic Mammalia in the geological department of the British Museum. London: Oxford University Press.Google Scholar
  36. Simpson, G.G. 1929. American Mesozoic Mammalia. Pea-body Mus. (Yale Univ.) Memoirs 3:1–171.Google Scholar
  37. Simpson, G.G. 1945. The principles of classification and a classification of mammals. Bull. Amer. Mus. Nat. Hist. 85:1–350.Google Scholar
  38. Sloan, R.E., and Van Valen, L. 1965. Cretaceous mammals from Montana. Science 148:220–227.CrossRefGoogle Scholar
  39. Stevens, W.P. 1988. Phylogeny of taeniolabidoid multi-tuberculates. J. Vert. Paleo. 8:26A.Google Scholar
  40. Swofford, D.L. 1989. Phylogenetic analysis using parsimony. Release 3. Illinois Natural History Survey (computer program distributed on 3 1/2-inch disk).Google Scholar

Copyright information

© Springer-Verlag New York, Inc. 1993

Authors and Affiliations

  • Nancy B. Simmons
    • 1
  1. 1.Department of MammalogyAmerican Museum of Natural HistoryNew YorkUSA

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