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    Intraspecific and interspecific variation in the Cryptotis nigrescens species complex of small-eared shrews (Insectivora: Soricidae), with the description of a new species from Colombia

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    Woodman and Timm 1993 - 805746.pdf (5.206Mb)
    Issue Date
    1993-09
    Author
    Woodman, Neal
    Timm, Robert M.
    Publisher
    Field Museum of Natural History
    Type
    Article
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    Abstract
    The Cryptotis nigrescens species complex of small-eared shrews previously was considered to consist of a single, wide-ranging species with three subspecies distributed from southern Mexico to Panama. Our study of the patterns of morphological variation within this complex indicates that it is much more diverse and speciose than earlier believed. The group includes populations that occur only at high elevations (> 500 m) as well as the only taxon in the genus restricted to elevations below 100 m. Based on our investigations, we recognize five species: C. mayensis occurs on the Yucatan Peninsula and is known from an isolated locality in Guerrero; C. merriami has a patchy distribution from Chiapas, Mexico, to northern Costa Rica; C. nigrescens inhabits conterminous highIands in Costa Rica and Panama; C. mera is known from two isolated mountaintops along the Panama/Colombia border; and we describe a new species from the Central Cordillera of Colombia, which extends the known distribution of the complex to the southeast. In addition, recent studies indicate that C. hondurensis and C. magna may be imbedded phylogenetically within the C. nigrescens complex.
     
    Resumen--Cryptotis nigrescens es un complejo de especie que solía considerarse como una sola especie con tres subespecies distribuídas a lo largo de América Latina desde el sur de México hasta Panamá. Nuestro estudio de patrones de variación morfológica en este complejo indica que es diverso y con más especies de las que se había pensado antes. El grupo incluye poblaciones que habitan solamente en elevaciones por encima de los 500 m, y también el único taxón en el género que está restringido a elevaciones bajo 100 m. Basados en nuestras investigaciones, reconocemos cinco especies. La primera, C. mayensis, se encuentra en la Península de Yucatán y en una localidad aislada en Guerrero, México. La segunda, C. merriami, tiene una distribución discontinua desde Chiapas en México hasta el norte de Costa Rica. La especie C. nigrescens habita en las cordilleras de Costa Rica y Panamá. Se sabe que C. mera vive en las cimas de dos montañas aisladas en la frontera entre Panamá y Colombia. La última es una especie nueva que describimos en esta publicación y que mora en la Cordillera Central de Colombia y que extiende la distribución del complejo hacia el sureste. Además, estudios recientes indican que las especies C. hondurensis y C. magna pueden estar relacionadas filogenéticamente con el complejo C. nigrescens.
     
    URI
    http://hdl.handle.net/1808/5243
    Collections
    • Center for Latin American and Caribbean Studies Scholarly Works [738]
    • Ecology & Evolutionary Biology Scholarly Works [1516]
    • Kansas African Studies Center Scholarly Works [272]
    Citation
    Woodman, N. and R. M. Timm. 1993. Intraspecific and interspecific variation in the Cryptotis nigrescens species complex of small-eared shrews (Insectivora: Soricidae), with the description of a new species from Colombia. Fieldiana: Zoology (New Series) 74:1–30

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    Contact KU ScholarWorks
    785-864-8983
    KU Libraries
    1425 Jayhawk Blvd
    Lawrence, KS 66045
    785-864-8983

    KU Libraries
    1425 Jayhawk Blvd
    Lawrence, KS 66045
    Image Credits
     

     

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