Descriptions of five new species of the salamander genus<i>Chiropterotriton</i>(Caudata: Plethodontidae) from eastern Mexico and the status of three currently recognized taxa

Olea, Gabriela Parra; García‐Castillo, Mirna G.; Rovito, Sean M.; Maisano, Jessica A.; Howard, James L.; Wake, David B.

doi:10.7717/peerj.8800

Cited by 19 publications

(17 citation statements)

References 36 publications

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“…Such areas are poorly explored, and herpetologists have found new species of secretive or minute amphibians, mostly salamanders (e.g. Hanken & Wake, 2001; Canseco-Márquez & Gutiérrez-Mayén, 2005; Parra-Olea et al ., 2020) in these habitats, which increases the proportion of Mexican species for which helminth fauna is unknown.…”

Section: Discussionmentioning

confidence: 99%

Research on helminths from Mexican amphibians: gaps, trends, and biases

2021

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We present a taxonomic, spatial, and thematic overview of the current state of knowledge on helminth parasites of Mexican amphibians. Sixty-six host species have been studied so far, representing 17.5% of the amphibian species distributed in Mexico. A total of 139 nominal species of helminths – 68 platyhelminths, 62 nematodes, three acanthocephalans, three annelids (hirudineans), and three arthropods (pentastomids) – have been recorded parasitizing these hosts. Most taxa found in larval stages have not been identified at the species level. The gastrointestinal nematode Aplectana itzocanensis exhibits the broadest host range, while the bladder fluke Gorgoderina attenuata and A. itzocanensis show the widest geographic distribution. Our analysis of helminthological studies evidenced gaps and biases on research efforts that have been devoted to relatively few host species, regions, and approaches. Most helminthological records come from two species, the cane toad Rhinella marina and the Montezuma's frog Lithobates montezumae, and most studies have focused on describing the helminth fauna of a host species in a particular location or on the description of new helminth species. The highest proportion of records corresponds to the Veracruzan biogeographic province, and helminth richness is significantly correlated with host richness and with total amphibian richness by biogeographic province. Only three provinces (Yucatan Peninsula, Pacific Lowlands, and Baja Californian) have positive, yet still low helminth species discovery effort. Based on our findings, we recommend pursuing research approaches unexplored in Mexico and we provide guidelines to improve research on helminths parasitizing amphibians.

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Section: Discussionmentioning

confidence: 99%

Research on helminths from Mexican amphibians: gaps, trends, and biases

2021

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“…Among them, the most diverse group are the Neotropical salamanders (hereafter bolitoglossines; Wake, 2012) containing 320 species grouped in 14 genera within the family Plethodontidae (AmphibiaWeb, 2021). Bolitoglossines have radiated in mountainous regions of the Neotropics and most species exhibit micro‐endemic distributions (Boza‐Oviedo et al, 2012; García‐Paris et al, 2000; Hanken & Wake, 1994; Parra‐Olea et al, 2020). Their highly restricted distributions, together with significant ongoing threats, make species within this group highly prone to extinction (Ripple et al, 2017), with nearly 60% of its species categorized as Endangered (EN) or Critically Endangered (CR) on the International Union for Conservation of Nature Red List of Threatened Species™ (hereafter IUCN Red List of Threatened Species™; IUCN, 2021).…”

Section: Introductionmentioning

confidence: 99%

Anticipating the potential impacts of Batrachochytrium salamandrivorans on Neotropical salamander diversity

et al. 2021

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Emergent infectious disease caused by the fungal pathogens Batrachochytrium dendrobatidis (Bd) and Batrachochytrium salamandrivorans (Bsal) represents one of the major causes of biodiversity loss in amphibians. While Bd has affected amphibians worldwide, Bsal remains restricted to Asia and Europe, but also could be a major threat for salamanders in the Western hemisphere, including the 320 bolitoglossine species described. Here, we predict the suitable areas for Bsal in the Neotropics and assess its potential impact on bolitoglossine diversity. For this, we determined the geographic patterns of taxonomic, phylogenetic, and functional diversity for bolitoglossines and modeled the potential distribution of Bsal in the Neotropics. We identified which species and regions could be at risk from an eventual introduction of Bsal in the region, quantified the degree of overlap between regions of high diversity and the suitable conditions for the pathogen, and considered species IUCN Red List status, and geographic range size. We found that regions of high taxonomic, phylogenetic, and functional diversity are concentrated in the Trans‐Mexican Volcanic Belt, Sierra Madre Oriental, the southern portion of Sierra Madre del Sur and the mountains of Oaxaca in México, as well as the Chiapan‐Guatemalan highlands, and the Cordilleras of Costa Rica and Panama. Alarmingly, the regions of high diversity for bolitoglossines and over 75% of the ranges of the more threatened species could be affected by Bsal. Given the unknown vulnerability of these species, we strongly recommend measures to avoid the introduction of Bsal in the continent. Abstract in Spanish is available with online material.

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“…The left and right dentaries touch each other antero-medially on the lower jaw. At the antero-medial ends, some expansions are developed posteriorly in the dorsal view, while in the anterior view this expansion slightly develops in the ventral direction (e.g., Villa et al 2014 ; Parra Olea et al 2020 ; Ponssa and Abdala 2020 ). This expansion is prominently present in the UPWS population (Fig.…”

Section: Resultsmentioning

confidence: 99%

A new species of the genus Tylototriton (Urodela, Salamandridae) from western Thailand

Pomchote¹,

Peerachidacho²,

Hernandez³

et al. 2021

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We describe a new species of the newt genus Tylototriton from Umphang Wildlife Sanctuary, Tak Province, western Thailand based on molecular and morphological evidence and named here as Tylototriton umphangensissp. nov. The new species is assigned to the subgenus Tylototriton and differs from other species in having dark-brown to blackish-brown body and limbs, truncate snout, prominent antero-medial ends of the expansion of the dentary bones, laterally protruding quadrate regions, indistinct and small rib nodules, a well-segmented vertebral ridge, and rough dorsolateral bony ridges, which are steeper anterior, and curved medially at the posterior ends. The molecular data show that Tylototriton umphangensissp. nov. differs from T. uyenoi sensu stricto by a 5% genetic sequence divergence of the mitochondrial NADH dehydrogenase subunit 2 region gene. The new species and T. uyenoi are both endemic to Thailand, distributed along the Northwest Thai (Dawna) Uplands of Indochina. To clarify the species boundary between Tylototriton umphangensissp. nov. and T. uyenoi, additional field research is needed in adjacent areas. Tylototriton umphangensissp. nov. is restricted to evergreen hill forests in Umphang Wildlife Sanctuary. We suggest that the new species should be classified as Endangered (EN) in the IUCN Red List.

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Descriptions of five new species of the salamander genusChiropterotriton(Caudata: Plethodontidae) from eastern Mexico and the status of three currently recognized taxa

Cited by 19 publications

References 36 publications

Research on helminths from Mexican amphibians: gaps, trends, and biases

Research on helminths from Mexican amphibians: gaps, trends, and biases

Anticipating the potential impacts of Batrachochytrium salamandrivorans on Neotropical salamander diversity

A new species of the genus Tylototriton (Urodela, Salamandridae) from western Thailand

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