Research Library | Digital Repository

New megalonychid sloths (Phyllophaga, Xenarthra) from the Quaternary of Hispaniola. American Museum novitates ; no.3303

Show simple item record MacPhee, R. D. E. en_US White, Jennifer L. (Jennifer Lynn) en_US Woods, Charles A. (Charles Arthur) en_US 2005-10-06T16:44:34Z 2005-10-06T16:44:34Z 2000 en_US
dc.description 32 p. : ill., map ; 26 cm. en_US
dc.description Includes bibliographical references (p. 22-25). en_US
dc.description.abstract As part of ongoing revisionary work on Antillean Megalonychidae, we document four new sloth species from Quaternary cave localities in Haiti and the Dominican Republic. The new taxa and their tribal affiliations are as follows: Megalocnus zile (Megalocnini), Acratocnus ye (Acratocnini), and Neocnus dousman and N. toupiti (Cubanocnini). Significantly, each is closely related to species in genera long known from Cuba. This observation is of primary biogeographical importance because the most parsimonious explanation for the presence of parallel arrays of lower-level clades of sloths on opposite sides of the Windward Passage is vicariance, not a series of uncoordinated over-water dispersals. For a brief period in the late Paleogene, eastern Cuba, northern Hispaniola, Puerto Rico, and the Aves Rise formed a large positive structure (GAARlandia) that was evidently briefly continuous with northwestern South America. We infer that the later subdivision and subsidence of major portions of GAARlandia must have finely vicariated its biota (which included sloths at least as early as the early Oligocene). On this argument, Megalocnus, Acratocnus, Neocnus, and Parocnus (= Mesocnus) must have already been in existence as independent clades at the time of origin of the Windward Passage (early Neogene), because cladistically diagnosable members of these taxa occur in Quaternary contexts in both Cuba and Hispaniola. This interpretation is consistent with several new lines of evidence concerning the paleontological and paleogeographical history of the Caribbean region. en_US
dc.format.extent 1847831 bytes
dc.format.mimetype application/pdf
dc.language eng en_US
dc.language.iso en_US
dc.publisher New York, NY : American Museum of Natural History en_US
dc.relation.ispartofseries American Museum novitates ; no.3303 en_US
dc.subject.lcc QL1 .A436 no.3303 2000 en_US
dc.subject.lcsh Megalonychidae, Fossil -- Hispaniola. en_US
dc.subject.lcsh Sloths, Fossil -- Hispaniola. en_US
dc.subject.lcsh Mammals, Fossil -- Hispaniola. en_US
dc.subject.lcsh Cave animals -- Hispaniola en_US
dc.subject.lcsh Paleontology -- Quaternary -- Hispaniola. en_US
dc.subject.lcsh Paleontology -- Hispaniola. en_US
dc.title New megalonychid sloths (Phyllophaga, Xenarthra) from the Quaternary of Hispaniola. American Museum novitates ; no.3303 en_US
dc.title.alternative New Hispaniolan sloths en_US
dc.type text en_US

Files in this item

This item appears in the following Collection(s)

  • American Museum Novitates
    Novitates (Latin for "new acquaintances"), published continuously and numbered consecutively since 1921, are short papers that contain descriptions of new forms and reports in zoology, paleontology, and geology. New numbers are published at irregular intervals.

Show simple item record

Search Entire Repository

Advanced Search


My Account