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Monterrey, Mexico

de la Maza-Benignos M.,Pronatura Noreste | Lozano-Vilano M.L.,Autonomous University of Nuevo Leon | Garcia-Ramirez M.E.,Autonomous University of Nuevo Leon
Neotropical Ichthyology | Year: 2015

In the present response paper, the article entitled “Morphometric variation of the Herichthys bartoni (Bean, 1892) species group (Teleostei: Cichlidae): How many species comprise H. labridens (Pellegrin, 1903)?” by Mejía et al. 2015 is critically reviewed. The current review pinpoints some of the more conspicuous conceptual inconsistencies and fundamental errors found in the study by Mejía et al. (2015), It is contended that the authors fail to provide any new insights into the complex biogeography and evolutionary history of the Nosferatu and Herichthys genus groups, and that while results of their Cox1 molecular analysis are comparable to those by De la Maza-Benignos et al. (2015), the conclusions of the two studies are not comparable. In addition, it is contested that, whereas the designation of genus Nosferatu by De la Maza- Benignos et al. (2015) was found on the principles of the biological and phylogenetic species concepts, the rejection of the genus by Mejía et al. (2015) is solely based “on the presence of (overlapping) morphometric characters” between genera. The assumption by Mejía et al. (2015), that because their geometric morphometrics analysis failed to provide separation of species, then Nosferatu genus does not correspond to a valid taxon; and their suggesting geometric morphometrics “as useful tool to discriminate species, because it allows to propose diagnostic characters” were not supported by their results. While Mejía et al. present some interesting thoughts on the systematics of Nosferatu, they unfortunately fail to provide any data that can be objectively assessed as relevant to motivate any changes in the current taxonomy. © 2015 Sociedade Brasileira de Ictiologia. Source

Hershler R.,Smithsonian Institution | Liu H.-P.,Metropolitan State University of Denver | Maza-Benignos M.D.L.,Pronatura Noreste | Ornelas P.,Pronatura Noreste | Carson E.W.,University of New Mexico
Western North American Naturalist | Year: 2014

This is the last in a series of papers clarifying the taxonomy of a critically imperiled assemblage of cochliopid gastropods (Tryonia sensu lato) that inhibit thermal springs in the Chihuahuan Desert (Mexico and United States). We describe 2 new narrowly endemic species of Tryonia from Chihuahua, both of which appear to have been recently extirpated, and we provide new records for 4 congeners (also from Chihuahua) and for a species of Pseudotryonia (from Durango). The 2 new species of Tryonia differ from closely similar regional congeners in shell and penial characters. On the basis of new anatomical data, we also transfer T. brunei Taylor, 1987 to the genus Juturnia and provide evidence that this species, which was endemic to the Phantom Lake spring complex in west Texas, became extinct sometime after 1984. Our findings provide additional insight into the complex biogeographic history of the Chihuahuan Desert cochliopids and further document the recent decline of regional spring-dwelling biota as a result of groundwater mining. © 2014. Source

Carson E.W.,University of New Mexico | Beasley R.R.,Savannah River Ecology Laboratory | Jones K.L.,Aurora University | Lance S.L.,Savannah River Ecology Laboratory | And 5 more authors.
Conservation Genetics Resources | Year: 2013

We developed microsatellite loci for the Julimes pupfish, Cyprinodon julimes. Twenty-five loci were screened across 19 individuals from Julimes Spring, Chihuahua, Mexico. The number of alleles per locus ranged from 2 to 14, observed heterozygosity ranged from 0.105 to 0.947, and the probability of identity values ranged from 0.022 to 0.588. We then tested for cross-amplification in the bighead pupfish, C. pachycephalus; twenty-three individuals from San Diego de Alcalá, Chihuahua, Mexico, were screened across the 20 loci that amplified cleanly. These new loci will be used for long-term genetic monitoring of these critically endangered species. © 2013 Springer Science+Business Media Dordrecht. Source

Carson E.W.,University of New Mexico | de la Maza-Benignos M.,Pronatura Noreste | de Lourdes Lozano-Vilano M.,Autonomous University of Nuevo Leon | Vela-Valladares L.,Pronatura Noreste | And 2 more authors.
Conservation Genetics | Year: 2014

Pupfishes (genus Cyprinodon) are iconic of biodiversity and endemism in the desert southwest of North America. Most of these species are imperiled, primarily because of excessive exploitation of water resources in this arid region. The critically endangered Julimes pupfish, Cyprinodon julimes, is restricted to a small, isolated, and highly modified desert spring in Chihuahua, México. We evaluated effective population size (microsatellites) and genetic variation (microsatellites and mitochondrial DNA) to determine the conservation genetic status of this species. The effective population size was critically low and indicated that this pupfish is at genetic risk of extinction through loss of adaptive variance and, potentially, from inbreeding depression. Mitochondrial variation was also extremely low, and haplotype frequency was biased heavily in favor of one of two variants. The uncommon haplotype was derived from a past hybridization event with the closely related C. eximius; whether cessation of introgressive hybridization is relevant to conservation management of Julimes pupfish is unknown but may be important to consider. Minimally, C. julimes is compromised genetically. Baseline population genetic information provided by this study will be vital to long-term monitoring of this highly imperiled species. © 2013 Springer Science+Business Media Dordrecht. Source

De La Maza-Benignos M.,Pronatura Noreste | Lozano-Vilano M.D.L.,Autonomous University of Nuevo Leon
Zootaxa | Year: 2013

Three new species of the genus Herichthys are described on the basis of chromatic, morphometric, and meristic characters. Herichthys pratinus sp. nov. from the Rio Salto in San Luis Potosi is characterized by a steep and shallow predorsal profile, a concavity before the eye, and adult males with a prominent forehead forming a nuchal hump, DXV-XVI, 10-11; and AV, 8-9. Herichthys pame sp. nov. from the Rio Tamasopo in San Luis Potosi is characterized by a gradual and acute predorsal contour, lack of concavity before the eye, and mouth angled slightly downward. Herichthys. molango sp. nov. from Laguna Azteca, Hidalgo is distinguished by small eyes and a slender (slightly broader than long), well-spaced, and indented lower pharyngeal plate with 2 rows of 8-9 medium-sized, lightly pigmented molars flanking the midline. We also provide redescriptions for three species of Herichthys, H. pantostictus, H. labridens, and H. steindachneri and a review of H. bartoni. Copyright © 2013 Magnolia Press. Source

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