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Porter CA, Beasley NE, Ordóñez-Garza N, Lindsey LL, Rogers DS, Lewis-Rogers N, Sites JW, Bradley RD. A new species of big-eared climbing rat, genus Ototylomys (Cricetidae: Tylomyinae), from Chiapas, Mexico. J Mammal 2017; 98:1310-1329. [PMID: 29674786 PMCID: PMC5901089 DOI: 10.1093/jmammal/gyx096] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/11/2017] [Accepted: 07/20/2017] [Indexed: 11/16/2022] Open
Abstract
An allopatric population of big-eared climbing rats (Ototylomys) from the Northern Highlands of Chiapas, Mexico, is described as a new species. The new taxon is part of a unique montane rainforest community that includes several other endemic species in the limited geographic range between the Río Grijalva and the Central Depression of Chiapas. Several cranial, external, and molecular characters distinguish this new species of big-eared climbing rat from its more widely distributed congener, Ototylomys phyllotis. We performed principal component and discriminate function analyses of cranial measurements, and found that specimens of the new species consistently could be distinguished from other Ototylomys with strong statistical support. Compared with exemplars of Ototylomys from elsewhere in their range, the new species possesses a karyotype that differs by 3 additional biarmed chromosome pairs, is fixed or nearly fixed for distinct electromorphs at 12 allozyme loci, and the mean genetic distance exceeds 14%, based on comparisons of the mitochondrial cytochrome b gene between the new species of Ototylomys and representatives of O. phyllotis. The restricted distribution in montane karst rainforest suggests that the species and its habitat may be a matter of conservation concern. Una población alopátrica de rata orejuda trepadora (Ototylomys) de las Tierras Altas del Norte de Chiapas, México se describe como una nueva especie. El nuevo taxón es parte de una comunidad única de bosque lluvioso montano que incluye varias especies endémicas en el área de distribución geográfica limitada entre el Río Grijalva y la Depresión Central de Chiapas. Varios caracteres craneales, externos, y moleculares distinguen la nueva rata orejuda trepadora de su congénere más ampliamente distribuido, Ototylomys phyllotis. Se realizaron análisis de componentes principales y de función discriminante de los caracteres craneales, y se encontró que los especímenes de La Pera fueron consistentemente distinguidos de otros Ototylomys con un fuerte soporte estadístico. En comparación con ejemplares de Ototylomys del rango, la nueva especie posee un cariotipo que difiere por 3 pares adicionales de cromosomas biarmados, está fijo o casi fijo por distintos electromorfos en 12 loci alozímicos. Adicionalmente, la media de la distancia genética comparada del gen mitochondrial citocromo b entre la nueva especie de Ototylomys y representantes de O. phyllotis, excede el 14%. La distribución restringida en el bosque lluvioso montano kárstico sugiere que la especie y su hábitat pueden ser de importancia para la conservación.
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Affiliation(s)
- Calvin A Porter
- Department of Biology, Xavier University of Louisiana, 1 Drexel Drive, New Orleans, LA 70125, USA (CAP, NEB)
| | - Nia E Beasley
- Department of Biology, Xavier University of Louisiana, 1 Drexel Drive, New Orleans, LA 70125, USA (CAP, NEB)
| | - Nicté Ordóñez-Garza
- Natural Science Research Laboratory, Museum of Texas Tech University, Lubbock, TX 79409, USA (NO-G, RDB)
| | - Laramie L Lindsey
- Department of Biological Sciences, Texas Tech University, Lubbock, TX 79409, USA (LLL, RDB)
| | - Duke S Rogers
- Department of Biology and Monte L. Bean Life Science Museum, Brigham Young University, Provo, UT 84602, USA (DSR, JWSJr)
| | - Nicole Lewis-Rogers
- Department of Zoology, Weber State University, 2505 University Circle, Ogden, UT 84408, USA (NL-R)
| | - Jack W Sites
- Department of Biology and Monte L. Bean Life Science Museum, Brigham Young University, Provo, UT 84602, USA (DSR, JWSJr)
| | - Robert D Bradley
- Natural Science Research Laboratory, Museum of Texas Tech University, Lubbock, TX 79409, USA (NO-G, RDB).,Department of Biological Sciences, Texas Tech University, Lubbock, TX 79409, USA (LLL, RDB)
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Sosa-Bibiano EI, Van Wynsberghe NR, Canto-Lara SB, Andrade-Narvaez FJ. Preliminary study towards a novel experimental model to study localized cutaneous leishmaniasis caused by Leishmania (Leishmania) mexicana. Rev Inst Med Trop Sao Paulo 2012; 54:165-9. [PMID: 22634889 DOI: 10.1590/s0036-46652012000300009] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/06/2011] [Accepted: 03/16/2012] [Indexed: 11/22/2022] Open
Abstract
There is not an experimental model of localized cutaneous leishmaniasis (LCL) caused by Leishmania (Leishmania) mexicana. The aim of the present study was to characterize the clinical and histological features of Peromyscus yucatanicus experimentally infected with L. (L.) mexicana. A total of 54 P. yucatanicus (groups of 18) were inoculated with 1x10(6) promastigotes of L. (L.) mexicana in the base of the tail. They were euthanized at three and six months post experimental infection. The control group was inoculated with RPMI-1640. The predominant clinical sign observed was a single ulcerated lesion in 27.77% (5/18) and in 11.11% (2/18) P. yucatanicus at three and six months respectively. The histological pattern described as chronic granulomatous inflammation with or without necrosis was found in 7/7 (100%) biopsies of euthanized P. yucatanicus at three (n = 5) and six (n = 2) months, respectively. These results resembled clinical and histological features caused by L. (L.) mexicana in humans, and support the possibility to employ P. yucatanicus as a novel experimental model to study LCL caused by this parasite.
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Affiliation(s)
- Erika Ivett Sosa-Bibiano
- Centro de Investigaciones Regionales Dr. Hideyo Noguchi, Universidad Autonoma de Yucatán, Mérida, Yucatán, México
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