The Xenarthrans of Nicaragua

نویسندگان

  • Hugh H. Genoways
  • Robert M. Timm
چکیده

The mammalian fauna of Nicaragua includes seven species in the order Xenarthra, including the brown-throated three-toed sloth (Bradypus variegatus) in the family Bradypodidae, Hoffmann's two-toed sloth (Choloepus hoffmannl) in the family Megalonychidae, the northern naked-tailed armadillo (Cabassous centralis) and nine-banded armadillo (Dasypus novemcinctus) in the family Dasypodidae, and the silky anteater (Cyclopes didactylus) and northern tamandua (Tamandua mexicana) in the family Myrmecophagidae. Additionally, the giant anteater (Myrmecophaga tridactyla) in the family Myrmecophagidae is (or was) certainly part of the fauna of Nicaragua but has yet to be documented there. Based on 133 xenarthran specimens available in museums and our observations, we herein review and provide new information on distributions, systematics, morphometrics, and natural history of these species in Nicaragua. Replacement of the milk dentition in Dasypus novemcinctus is described and illustrated, documenting the most common adult dental formula of i 010, c 01 0 , p 717, m 111 = 32. RESUMEN. Los Xenarthra de Nicaragua. La fauna mamifera de Nicaragua incluye siete especies del orden Xenarthra, incluyendo el perezoso de tres dedos (Bradypus variegatus) en la familia Bradypodidae, el perezoso (Choloepus hoffmannl) en la familia Megalonychidae, el armadillo zopilote (Cabassous centralis) y el cusuco (Dasypus novemcinctus) en la familia Dasypodidae y el tapacara (Cyclopes didactylus) y el oso hormiguero (Tamandua mexicana) en la familia Myrmecophagidae. Ademas, el oso caballo (Myrmecophaga tridactyla) en la familia Myrmecophagidae es (o fue) ciertamente parte de la fauna de Nicaragua per0 todavia no ha sido documentado alla. Basado en 133 especimenes de Xenarthra disponibles en museos y nuestras observaciones, revisamos y proveemos informacion nueva sobre distribuciones, sistematica, morfometrica y la historia natural de estas especies en Nicaragua. El reemplazo de la denticion lactea en Dasypus novemcinctus se describe e ilustra, documentando la formula dental adulta mas comun de i 010, c 010, p 717, m 111 = 32.

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تاریخ انتشار 2013