A New Species of Stream-breeding Treefrog of the Genus Charadrahyla (Hylidae) from the Sierra Madre del Sur of Guerrero, Mexico

Campbell, Jonathan A.; Blancas-Hernández, Jean Cristian; Smith, Eric N.

doi:10.1643/ch-08-143

Cited by 15 publications

(16 citation statements)

References 7 publications

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“…The most relevant break in our study, occurred within the SMS region, between the states of Oaxaca and Guerrero highlands, which are separated by the Río Verde drainage, this break is supported by studies in plants [32], lizards [127,128], frogs [30] and even in lowland species, such as iguanas [129]. AMOVA results highlighted the existence of genetic structure for all studied species.…”

Section: Phylogenetic and Population Structure Analysessupporting

confidence: 77%

“…The complex geological history of this region, as well as the cyclic changes in vegetation and climate, pose it as a challenging area for biogeographic and evolutionary studies; in addition, constant orogenic processes have promoted a highly broken topography characterized for isolated patches of humid montane forest between 600 and 3000 m, which includes both humid pineoak forest and cloud forest [20][21][22]. This mosaic-like landscape has been associated to centers of diversification, in which both a high species richness and endemism have evolved for the last 2 Myr, likely as a result of both environmental and geological complexity, as well as Pleistocene climatic fluctuations [6,15,20,[23][24][25][26][27][28], which is supported by relatively recent intraspecific differentiation processes in several groups of organisms (see [25,29]), therefore explaining the existence of numerous endemic species in different taxonomic groups, including birds [30][31][32][33][34].…”

Section: Introductionmentioning

confidence: 99%

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The geography of evolutionary divergence in the highly endemic avifauna from the Sierra Madre del Sur, Mexico

Rocha-Méndez

Sánchez‐González

González

et al. 2019

Preprint

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Background Mesoamerica is a remarkable region with a high geological and ecological complexity. Within northern Mesoamerica, the biotic province of the Sierra Madre del Sur (SMS) in western Mexico harbors exceptionally high avian endemism and diversity. Herein, we searched for spatially and temporally concordant phylogeographic patterns, in four bird genera from three distinct avian orders co-distributed across Mesoamerica and investigated their causes through hypothesis testing regarding historical processes. Selected species include endemic and differentiated populations across the montane forests of Mesoamerica, and particularly within the SMS. Results We gathered mitochondrial DNA sequences for at least one locus from 177 individuals across all species. We assessed genetic structure, demographic history, and defined a framework for the coalescent simulations used in biogeographic hypothesis testing temporal and spatial co-variance. Our analyses suggested shared phylogeographic breaks in areas corresponding to the SMS populations, and between the main montane systems in Mesoamerica, where the Central Valley of Oaxaca and the Nicaragua Depression being the most frequently shared breaks among analyzed taxa. Nevertheless, dating analyses and divergence patterns observed were consistent with the hypothesis of broad vicariance across Mesoamerica derived from mechanisms operating at distinct times across taxa in the SMS. Conclusions Our study provides a framework for understanding the evolutionary origins and historical factors enhancing speciation in well-defined regions within Mesoamerica, indicating that the evolutionary history of extant biota inhabiting montane forests is complex and often idiosyncratic.

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Section: Phylogenetic and Population Structure Analysessupporting

confidence: 77%

Section: Introductionmentioning

confidence: 99%

The geography of evolutionary divergence in the highly endemic avifauna from the Sierra Madre del Sur, Mexico

Rocha-Méndez

Sánchez‐González

González

et al. 2019

Preprint

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“…However, the west and east portions of the Sierra have been largely ignored. Recent visits to the west portion have yielded a number of discoveries of new species (e.g., Campbell and Flores-Villela 2008, Campbell et al 2009, Pavón-Vázquez et al 2011, Feria-Ortiz and García-Vázquez 2012, Campbell et al 2014). This suggests that the diversity of the Sierra Madre del Sur of Guerrero is higher than currently known (Palacios-Aguilar and Flores-Villela 2018), particularly for small and secretive snakes as exemplified by the present work and the recent descriptions of Epictiaschneideri Wallach, 2016, Geophisoccabus Pavón-Vázquez, García-Vázquez, Blancas-Hernández & Nieto-Montes de Oca, 2011, and Rhadinelladysmica Campillo, Dávila-Galavíz, Flores-Villela & Campbell, 2016.…”

Section: Discussionmentioning

confidence: 99%

A new rare species of the Rhadinaea decorata group from the Sierra Madre del Sur of Guerrero, Mexico (Squamata, Colubridae)

García‐Vázquez¹,

Pavón‐Vázquez²,

Blancas-Hernández³

et al. 2018

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A new species of the Rhadinaeadecorata group is described based on two specimens from the Sierra Madre del Sur, Guerrero, Mexico. The new species differs from all other members of the genus Rhadinaea by having: eight supralabials; 149–151 (male) ventrals; 63–77 (male) subcaudals; two large pale nuchal blotches, forming an incomplete collar that occupies two scales laterally and is bissected along the dorsal midline; a postocular pale marking consisting of a well-defined, narrow line beginning behind the upper posterior margin of the eye and extending posteriorly nearly horizontally until connecting with the nuchal blotches; and the dark ground color of the flanks extending to the lateral portion of the ventrals. The large nuchal blotches distinguish the new species from the other members of the R.decorata group, except for R.cuneata and some individuals of R.hesperia (pale nuchal marking one-scale wide in R.marcellae, absent in the other species). The condition of the postocular pale marking distinguishes it from R.cuneata and R.hesperia (postocular pale marking wedge-shaped in R.cuneata, not connected with the pale post-cephalic markings in R.hesperia). Furthermore, the number of subcaudals and the coloration of the lateral portion of the ventrals distinguish it from R.omiltemana and R.taeniata, the remaining congeners found in Guerrero (85–90 in males of R.omiltemana and 91–121 in R.taeniata; dark color of the flanks not reaching ventrals in the former species, occasionally and faintly in R.taeniata). Additionally, a new combination for R.stadelmani is proposed. The new species is the first described in the genus Rhadinaea in more than 40 years.

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“…Only two of these are known to occur within our region, Incilius aurarius from Chiapas and Guatemala , which will probably qualify as an AZE trigger species once it is assessed by the Red List, and Bolitoglossa chinanteca from Oaxaca ) (see page 111). The other six are: Charadrahyla tecuani (Campbell et al 2009), Pseudoeurycea kuautli , and Thorius hankeni ) from Guerrero; Pseudoeurycea cafetalera from Veracruz ; Incilius mccoyi from Chihuahua (Santos-Barrera & Villela 2011); and Craugastor galacticorhinus from Puebla (originally described as Eleutherodactylus galacticorhinus by Canseco- . It is possible the Red List had reason to doubt the validity of these descriptions, but we are unaware of any such reasons.…”

mentioning

confidence: 99%

Amphibian Alliance for Zero Extinction Sites in Chiapas and Oaxaca

Lamoreux¹,

McKnight²,

Hernández³

2015

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A New Species of Stream-breeding Treefrog of the Genus Charadrahyla (Hylidae) from the Sierra Madre del Sur of Guerrero, Mexico

Cited by 15 publications

References 7 publications

The geography of evolutionary divergence in the highly endemic avifauna from the Sierra Madre del Sur, Mexico

The geography of evolutionary divergence in the highly endemic avifauna from the Sierra Madre del Sur, Mexico

A new rare species of the Rhadinaea decorata group from the Sierra Madre del Sur of Guerrero, Mexico (Squamata, Colubridae)

Amphibian Alliance for Zero Extinction Sites in Chiapas and Oaxaca

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