The systematics of the Mexican populations of Macrobrachium digueti (Bouvier, 1895) (Decapoda: Caridea: Palaemonidae)

ABSTRACT Macrobrachium digueti (Bouvier, 1895), an amphidromous shrimp with unequal chelae, was described from Mulegé River in Baja California Peninsula, Mexico. A controversy on the morphological identity of M. digueti started six decades ago. Some authors point out that the redescription given in...

Descripción completa

Detalles Bibliográficos
Autores principales: García Velazco, Humberto, Maeda Martínez, Alejandro M., Obregón Barboza, Hortencia, Campos Torres, Oliva, Murugan, Gopal
Formato: Artículo
Lenguaje:inglés
Publicado: 2017
Materias:
Acceso en línea:http://eprints.uanl.mx/18133/1/431.pdf
_version_ 1824415142801047552
author García Velazco, Humberto
Maeda Martínez, Alejandro M.
Obregón Barboza, Hortencia
Campos Torres, Oliva
Murugan, Gopal
author_facet García Velazco, Humberto
Maeda Martínez, Alejandro M.
Obregón Barboza, Hortencia
Campos Torres, Oliva
Murugan, Gopal
author_sort García Velazco, Humberto
collection Repositorio Institucional
description ABSTRACT Macrobrachium digueti (Bouvier, 1895), an amphidromous shrimp with unequal chelae, was described from Mulegé River in Baja California Peninsula, Mexico. A controversy on the morphological identity of M. digueti started six decades ago. Some authors point out that the redescription given in 1952 by L. Holthuis in his important revision of the Palaemonidae of the American continent does not correspond to Bouvier’s species. A controversy also exists on the taxonomy of the species because morphological and molecular studies have indicated great similarity of M. acanthochirus Villalobos, 1967 and M. michoacanus Nates and Villalobos in Villalobos Hiriart & Nates Rodríguez, 1990 with M. digueti (sensu Bouvier), suggesting their synonymy with the last species. We review the systematics of the Mexican populations of the putative M. digueti (Bouvier, 1895) consisting by individuals with unequal chelae, a carpus shorter than the merus and scarce pubescence on the palm and cutting edges of the fingers of the larger male second pereiopod. Extensive field surveys of the species of Macrobrachium Spence Bate, 1868 were made along the Pacific slope of Mexico, from the Baja California Peninsula in the north to Guerrero state in the south, an area that covered the type localities of the three nominal species. Results of the morphological revision and molecular genetic analyses with fragments of the mitochondrial genes 16S and COI confirmed the morphological identity of M. digueti as described by Bouvier and indicate that this entity is a morphologically plastic genetic species with a disjunct distribution along the peninsula and the Pacific mainland. Our study also confirms that M. acanthochirus and M. michoacanus are junior synonyms of M. digueti. Implication of present findings on the amphiamerican species groups of Macrobrachium is discussed. Key Words: Baja California Peninsula, digueti subgroup, olfersii subgroup, Pacific slope, phylogenetics, systematics, 16S gene, COI gene
format Article
id eprints-18133
institution UANL
language English
publishDate 2017
record_format eprints
spelling eprints-181332020-03-19T15:59:19Z http://eprints.uanl.mx/18133/ The systematics of the Mexican populations of Macrobrachium digueti (Bouvier, 1895) (Decapoda: Caridea: Palaemonidae) García Velazco, Humberto Maeda Martínez, Alejandro M. Obregón Barboza, Hortencia Campos Torres, Oliva Murugan, Gopal QH Historia Natural, Biología ABSTRACT Macrobrachium digueti (Bouvier, 1895), an amphidromous shrimp with unequal chelae, was described from Mulegé River in Baja California Peninsula, Mexico. A controversy on the morphological identity of M. digueti started six decades ago. Some authors point out that the redescription given in 1952 by L. Holthuis in his important revision of the Palaemonidae of the American continent does not correspond to Bouvier’s species. A controversy also exists on the taxonomy of the species because morphological and molecular studies have indicated great similarity of M. acanthochirus Villalobos, 1967 and M. michoacanus Nates and Villalobos in Villalobos Hiriart & Nates Rodríguez, 1990 with M. digueti (sensu Bouvier), suggesting their synonymy with the last species. We review the systematics of the Mexican populations of the putative M. digueti (Bouvier, 1895) consisting by individuals with unequal chelae, a carpus shorter than the merus and scarce pubescence on the palm and cutting edges of the fingers of the larger male second pereiopod. Extensive field surveys of the species of Macrobrachium Spence Bate, 1868 were made along the Pacific slope of Mexico, from the Baja California Peninsula in the north to Guerrero state in the south, an area that covered the type localities of the three nominal species. Results of the morphological revision and molecular genetic analyses with fragments of the mitochondrial genes 16S and COI confirmed the morphological identity of M. digueti as described by Bouvier and indicate that this entity is a morphologically plastic genetic species with a disjunct distribution along the peninsula and the Pacific mainland. Our study also confirms that M. acanthochirus and M. michoacanus are junior synonyms of M. digueti. Implication of present findings on the amphiamerican species groups of Macrobrachium is discussed. Key Words: Baja California Peninsula, digueti subgroup, olfersii subgroup, Pacific slope, phylogenetics, systematics, 16S gene, COI gene 2017 Article PeerReviewed text en cc_by_nc_nd http://eprints.uanl.mx/18133/1/431.pdf http://eprints.uanl.mx/18133/1.haspreviewThumbnailVersion/431.pdf García Velazco, Humberto y Maeda Martínez, Alejandro M. y Obregón Barboza, Hortencia y Campos Torres, Oliva y Murugan, Gopal (2017) The systematics of the Mexican populations of Macrobrachium digueti (Bouvier, 1895) (Decapoda: Caridea: Palaemonidae). Journal of Crustacean Biology, 37 (2). pp. 168-186. ISSN 0278-0372 http://doi.org/10.1093/jcbiol/rux008 doi:10.1093/jcbiol/rux008
spellingShingle QH Historia Natural, Biología
García Velazco, Humberto
Maeda Martínez, Alejandro M.
Obregón Barboza, Hortencia
Campos Torres, Oliva
Murugan, Gopal
The systematics of the Mexican populations of Macrobrachium digueti (Bouvier, 1895) (Decapoda: Caridea: Palaemonidae)
thumbnail https://rediab.uanl.mx/themes/sandal5/images/online.png
title The systematics of the Mexican populations of Macrobrachium digueti (Bouvier, 1895) (Decapoda: Caridea: Palaemonidae)
title_full The systematics of the Mexican populations of Macrobrachium digueti (Bouvier, 1895) (Decapoda: Caridea: Palaemonidae)
title_fullStr The systematics of the Mexican populations of Macrobrachium digueti (Bouvier, 1895) (Decapoda: Caridea: Palaemonidae)
title_full_unstemmed The systematics of the Mexican populations of Macrobrachium digueti (Bouvier, 1895) (Decapoda: Caridea: Palaemonidae)
title_short The systematics of the Mexican populations of Macrobrachium digueti (Bouvier, 1895) (Decapoda: Caridea: Palaemonidae)
title_sort systematics of the mexican populations of macrobrachium digueti bouvier 1895 decapoda caridea palaemonidae
topic QH Historia Natural, Biología
url http://eprints.uanl.mx/18133/1/431.pdf
work_keys_str_mv AT garciavelazcohumberto thesystematicsofthemexicanpopulationsofmacrobrachiumdiguetibouvier1895decapodacarideapalaemonidae
AT maedamartinezalejandrom thesystematicsofthemexicanpopulationsofmacrobrachiumdiguetibouvier1895decapodacarideapalaemonidae
AT obregonbarbozahortencia thesystematicsofthemexicanpopulationsofmacrobrachiumdiguetibouvier1895decapodacarideapalaemonidae
AT campostorresoliva thesystematicsofthemexicanpopulationsofmacrobrachiumdiguetibouvier1895decapodacarideapalaemonidae
AT murugangopal thesystematicsofthemexicanpopulationsofmacrobrachiumdiguetibouvier1895decapodacarideapalaemonidae
AT garciavelazcohumberto systematicsofthemexicanpopulationsofmacrobrachiumdiguetibouvier1895decapodacarideapalaemonidae
AT maedamartinezalejandrom systematicsofthemexicanpopulationsofmacrobrachiumdiguetibouvier1895decapodacarideapalaemonidae
AT obregonbarbozahortencia systematicsofthemexicanpopulationsofmacrobrachiumdiguetibouvier1895decapodacarideapalaemonidae
AT campostorresoliva systematicsofthemexicanpopulationsofmacrobrachiumdiguetibouvier1895decapodacarideapalaemonidae
AT murugangopal systematicsofthemexicanpopulationsofmacrobrachiumdiguetibouvier1895decapodacarideapalaemonidae