Two New Species of Haematoloechus (Digenea: Plagiorchidae) Parasitizing Rana brownorum (Amphibia: Ranidae) from Southeast Mexico

Velázquez-Urrieta, Yanet; Oceguera‐Figueroa, Alejandro; León‐Régàgnon, Virginia

doi:10.1645/18-169

Cited by 6 publications

(2 citation statements)

References 23 publications

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“…Most of the species recently identified and/or described from Mexican amphibians have been distinguished or authored by researchers from the group headed by Dr León-Règagnon using molecular characters in addition to morphology (e.g. León-Règagnon, 2010; Velázquez-Urrieta et al ., 2019). This trend not only evidences the common occurrence and species richness of this genus in Mexican amphibians, but also reflects the importance of the scientific contributions of researchers specialized in taxonomic groups for the rate of species discovery and description.…”

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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“…In Mexico, two species of the genus Langeronia have been previously recorded, namely Langeronia macrocirra Caballero and Bravo-Hollis, 1949, and Langeronia jimenezi Iruegas-Buentello & Salinas-López, 1989. For the genus Haematoloechus , 16 species have been reported, 12 of which are endemic (Pérez-Ponce de León et al , 2000; León-Règagnon, 2010; León-Règagnon & Topan, 2018; Velazquez-Urrieta et al , 2019; Velazquez-Urrieta & Pérez-Ponce de León, 2022). Two of these have been recorded in Chiapas, Haematoloechus floedae Harwood, 1932 and Haematoloechus sp.…”

Section: Introductionmentioning

confidence: 99%

Gathering morphological and molecular data for identifying two species of trematodes from the neotropical Vaillant's frog, Lithobates vaillanti (Amphibia: Ranidae) in the highlands of Chiapas, south-eastern Mexico

et al. 2023

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Mexico possesses a large diversity of amphibians partly due to its complex topography and transitional position between the Nearctic and Neotropical biogeographical regions. However, its helminth parasite fauna has been relatively poorly studied. Specimens of the Vaillant's frog, Lithobates vaillanti (Brocchi) were sampled in the tropical rain forest of Nahá, in the Chiapas Highlands, and examined for parasites. Two trematode species were collected from their hosts; morphologically, specimens were allocated to the genera Langeronia Caballero and Bravo-Hollis, 1949 and Haematoloechus Looss, 1899, respectively. Individuals were sequenced for two molecular markers (the mitochondrial cytochrome c oxidase gene, and the ribosomal gene 28S), and processed for morphological analyses, including scanning electron microscopy. The new evidence was not enough to accomplish the identification at species level of Langeronia sp. due to the lack of sequence data from the type localities of Langeronia parva Christian, 1970 and Langeronia macrocirra Caballero and Bravo-Hollis, 1949. Likewise, the newly generated data were useful to properly identify the adult specimens of lung flukes as Haematoloechus complexus Seely, 1906.

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