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427 resultados encontrados para: TEMA: Taxonomía animal
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1.
Libro
Manual de identificación de aves residentes y migratorias: Área de Protección de Flora y Fauna Metzabok / textos: Manuela Morales Herández ; ilustraciones: José Guadalupe Coutiño Monzón
Morales Herández, Manuela ;
México, D. F. : Comisión Nacional de Áreas Naturales Protegidas. Área de Protección de Flora y Fauna Metzabok , s.f.
Clasificación: C CH/598.2097275 / M6
Bibliotecas: San Cristóbal
Cerrar
SIBE San Cristóbal
ECO010018650 (Disponible)
Disponibles para prestamo: 1
Resumen en: Español |
Resumen en español

Contar con una gran biodiversidad en nuestro país, nos enorgullece como mexicanos, preservemos nuestras riquezas naturales y culturales protegiendo las áreas naturales protegidas, donde habitan maravillosos seres vivos, ya que la transformación de su ambiente y su comercio es la principal amenaza a su supervivencia.


2.
Tesis - Maestría
Caracterización y comparación morfogeométrica en Heteromys (Rodentia: Heteromyidae) de México y Centroamérica / Juan Carlos Sarmiento Pérez
Sarmiento Pérez, Juan Carlos ; Lorenzo Monterrubio, Consuelo (directora) ; Hernández Betancourt, Silvia F. (co-directora) ; González Díaz, Alfonso Ángel (asesor) ;
San Cristóbal de Las Casas, Chiapas, México : El Colegio de la Frontera Sur , 2017
Clasificación: TE/599.3230972 / S2
Bibliotecas: San Cristóbal
Cerrar
SIBE San Cristóbal
ECO010019166 (Disponible)
Disponibles para prestamo: 1
PDF
Índice | Resumen en: Español |
Resumen en español

El género tropical, Heteromys, agrupa especies con varios cambios taxonómicos y límites interespecíficos aún no esclarecidos, por lo que se comparó la variación intraespecífica e interespecífica de diez especies mediante morfometría geométrica, y se evaluó si los cambios genéticos conocidos para las especies se ven reflejados en la forma craneal. Se digitalizaron tres vistas craneales y una mandibular de 638 ejemplares adultos. Los análisis morfométricos se llevaron a cabo con los paquetes estadísticos IMP (CoordGen y CVAgen) y PAST. Se evaluó la variación sexual y los cambios en forma craneal mediante análisis de varianza, multivariado (MANOVA) y de variables canonícas (CVA). Los cambios craneales se observaron con gradillas de deformación, y con distancias Procrustes se llevó a cabo un análisis cluster para comparar con un árbol filogenético. Solo H. desmarestianus y H. irroratus presentaron variación sexual. Cada especie posee un morfotipo diferenciado con cambios en el rostro, el arco cigomático, la bóveda craneal, el hueso occipital y el foramen magnum, así como en el angular, el cóndilo y el diastema en la mandíbula. La agrupación cluster coincide con algunos clados identificados mediante análisis moleculares. Los ejemplares considerados como candidatos a especie (Heteromys sp.), presentaron evidencias morfométricas únicas que lo separan del resto de las especies.

Índice

Capítulo I
Resumen y palabras clave
Introducción general
Objetivos e hipótesis
Capítulo II
Artículo
Abstract
Introduction
Methods
Results
Discussion
Acknowledgements
References
Appendix
Figures
Tables
Capítulo III
Conclusión
Capítulo IV
Literatura citada


3.
- Artículo con arbitraje
*Solicítelo con su bibliotecario/a
Complementary description of Ergasilus arthrosis Roberts, 1969 (Copepoda: Poecilostomatoida: Ergasilidae), a new parasite of cichlid teleosts in southeast Mexico
Jiménez García, María Isabel ; Suárez Morales, Eduardo (coaut.) ;
Contenido en: Systematic Parasitology Vol. 94, no. 1 (January 2017), p. 81–90 ISBN:1573-5192
Nota: Solicítelo con su bibliotecario/a
Resumen en: Inglés |
Resumen en inglés

During a parasitological survey of the ichthyofauna of Lake Catemaco, a freshwater system in the Mexican State of Veracruz, the widespread copepod Ergasilus arthrosis Roberts, 1969 was recovered from two cichlid teleosts, Mayaheros urophthalmus (Günther) and Oreochromis sp. This is the first confirmed record of this copepod species outside of the United States and from Mexico; its finding as a parasite of cichlids represents an expansion of the known host range for this copepod. The local prevalence and intensity of infection of E. arthrosis was highest in M. urophthalmus. The infection prevalence of E. arthrosis on M. urophthalmus (60%) was higher than that known for other ergasilids on cichlids. Ergasilus arthrosis can be distinguished from its closest congener E. lizae Krøyer, 1863 by the morphometry of the antennary segments, the ventral ornamentation of the thoracic sclerites and by details of the antennulary setation, but also by its habitat and host preferences. Taxonomic illustrations and morphological details of the specimens examined are also provided together with comments on the variability of this species.


4.
- Artículo con arbitraje
Designation of a neotype and redescription of Hesione reticulata von Marenzeller, 1879 from Japan (Annelida, Hesionidae)
Jimi, Naoto ; Salazar Vallejo, Sergio I. (coaut.) ; Kajihara, Hiroshi (coaut.) ;
Contenido en: ZooKeys No. 657 (February 2017), p. 29-41 ISSN: 1313-2970
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Resumen en: Inglés |
Resumen en inglés

The hesionid polychaete Hesione reticulata von Marenzeller, 1879 was described from Enoshima Island, Japan and has been recorded also from the Red Sea. Depending on researchers, it has been regarded as either a distinct species or synonymous with older established ones. The type specimen has been lost. In order to clarify its taxonomic status, H. reticulata is herein redescribed, illustrated, and a neotype is proposed based on recent material collected near the type locality. The diagnostic features include the presence of several dorsal, discontinuous longitudinal bands, interrupted by pale segmental spots; prostomium with tiny antennae; a tuberculated dorsal integument; acicular lobes double; and neurochaetal blades with guards approaching the distal tooth. The dorsal color pattern in life enables a clear distinction from similar species such as H. intertexta Grube, 1878 amongst others. Mitochondrial COI barcoding sequences are deposited in the DNA Data Bank of Japan. A key to Hesione species from Japan is also included.


5.
Artículo
First occurrence of Mesocyclops aspericornis (Daday, 1906) (Copepoda: Cyclopoida) in northern Colombia
Fuentes Reinés, Juan Manuel ; Suárez Morales, Eduardo (coaut.) ; Granados Ramírez, Cristian Enrique (coaut.) ;
Contenido en: Check List Vol. 13, no. 2, article 2076 (March 2017), p. 1-6 ISSN: 1809-127X
PDF
Resumen en: Inglés |
Resumen en inglés

The occurrence of the Afro-Asian freshwater cyclopoid copepod Mesocyclops aspericornis in the Gaira River, Magdalena, northern Colombia, represents the first record in the area and expands its known distributional range in South America. The specimens examined are described and compared with available morphological data. The variability of this species is confirmed among American and Afro-Asian populations but it was observed also between two Colombian populations. This record contributes to track the advancement of this introduced species in the Americas.


6.
- Artículo con arbitraje
How false is Nereis falsa (Annelida, Phyllodocida, Nereididae)?
Salazar Vallejo, Sergio I. ; Gillet, Patrick (coaut.) ; Surugiu, Victor (coaut.) ;
Contenido en: Revista de Biologia Tropical Vol. 65, no. 3 (September 2017), p. 847-857 ISSN: 2215-2075
PDF
Resumen en: Español | Inglés |
Resumen en español

Entre los nombres de especies de poliquetos hay muchos problemas taxonómicos y resolver los procedimientos taxonómicos confusos o inadecuados consume mucho tiempo y es muy importante. Nuestro objetivo en esta contribución es analizar cuál es la situación para Nereis falsa de Quatrefages, 1866; fue basada en Nereis pulsatoria? Rathke, 1837 del Mar Negro, y se considera como una especie de amplia distribución. La especie se ha recolectado en diferentes sustratos bénticos e incluso puede hallarse en objetos flotantes o sobre tortugas marinas. Nereis falsa se ha registrado del Mar Mediterráneo, en el Atlántico oriental a lo largo del África, en el Atlántico occidental (Golfo de México, Mar Caribe, Brasil), y en el Índico. Sin embargo, a pesar de haber sido propuesta para una especie del Mar Negro no se ha vuelto a encontrar en el mismo. ¿Cómo conjugar que una especie pueda alcanzar una vasta distribución y faltar en su localidad tipo? Después de un estudio cuidadoso de las publicaciones sobre el tema y con nuestra comprensión de la sistemática de los poliquetos neréididos, clarificamos la situación prevalente al examinar varias especies relacionadas e indicamos algunas cuestiones nomenclaturales. Nuestro análisis indica que hay más de una especie bajo el mismo nombre y en esta contribución, nos enfocamos al problema, proponemos algunas formas para promover la discusión y la acción, y sugerimos algunas actividades de investigación para resolver el problema.

Resumen en inglés

There are many taxonomic problems in polychaete species names and solving confusing or inadequate taxonomic procedures is both time-demanding and extremely important. Our objective in this contribution was to analyse what is the current taxonomic situation for Nereis falsa de Quatrefages, 1866; it was based upon Nereis pulsatoria? Rathke, 1837 from the Black Sea, and it is currently regarded as having a very wide distribution. The species has been collected from different benthic substrates and even can be found on floating objects or marine turtles. Nereis falsa has been recorded from the Mediterranean Sea, the Eastern Atlantic along Africa, the Western Atlantic (Gulf of Mexico, Caribbean Sea, Brazil), and the Indian Ocean. However, despite the fact N. falsa was proposed as a species from the Black Sea, it has not yet been found there. How can we explain that a species is able to attain a very wide distribution and yet be missing from its type locality? After a careful study of previous publications and with our understanding of the systematics of nereidid polychaetes, we clarify the current situation by examining several related species and pointed out some nomenclatural issues. Our analysis indicates there is more than one species included under the same name, and in this contribution we propose some means to promote discussion and actions, and suggest some basic research for solving this issue.


7.
- Artículo con arbitraje
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Resumen en: Inglés |
Resumen en inglés

Surveys of the anchialine crustacean fauna of the Yucatan Peninsula (YP), Mexico, have revealed the occurrence of calanoid copepods. The genus Stephos Scott, 1892, belonging to the family Stephidae is among the most frequent and widely distributed groups in anchialine caves but has not been hitherto recorded from the YP. Recent collections from an anchialine cave in an island off the northern coast of the YP yielded many specimens of a new species of Stephos. The new taxon, S. fernandoi sp. n., is described here based on male and female specimens. The new species is clearly distinguished from its congeners by the following characters: male left fifth leg with three terminal lamellae plus subdistal process, right leg with distal row of peg-like elements; female fifth leg with single long, acute apical process; genital double-somite with two rows each of 4 long spinules adjacent to operculum; legs 2-4 with articulated setae. The diversity of the genus shows regional differences; the Australia-Western Pacific region is the most diverse (eleven species), followed by the Mediterranean (seven species) and the Northeastern Atlantic (six species); only four species are known from the Northwestern Tropical Atlantic (NWTA). The morphology of the female fifth leg was examined to explore possible biogeographic trends in the genus; patterns suggest multiple colonization events in the highly diverse regions and a relatively recent radiation in the NWTA, characterized by anchialine forms. The introduction of stephid copepods in the region may be a relatively recent event derived from colonization of benthopelagic ancestral forms and subsequent invasion onto cave habitats. The new species appears to be linked to the strictly anchialine Miostephos.


8.
Artículo
*Solicítelo con su bibliotecario/a
Revision of Marphysa de Quatrefages, 1865 and some species of Nicidion Kinberg, 1865 with the erection of a new genus (Polychaeta: Eunicidae) from the Grand Caribbean
Molina Acevedo, Isabel Cristina ; Carrera Parra, Luis Fernando (coaut.) ;
Contenido en: Zootaxa Vol. 4241, no. 1 (marzo 2017), p. 001–062 ISSN: 1175-5334
Nota: Solicítelo con su bibliotecario/a
Resumen en: Inglés |
Resumen en inglés

Nine species of Marphysa from the Grand Caribbean Region are recognized and described based on the type and non-type specimens. One species is formally described as new: M. emiliae n. sp., and one is re-established as a valid species: M. fragilis Treadwell, 1911. The diagnosis of Nicidion Kinberg, 1865 is restricted based on novel features of the maxillary apparatus. Nicidion angeli (Carrera-Parra & Salazar-Vallejo, 1998) is redescribed, and two species that previously belonged to Marphysa, are transferred to Nicidion: N. longula (Ehlers, 1887) n. comb. and N. obtusa (Verrill, 1900) n. comb.. A new genus Treadwellphysa n. gen. is proposed to include those species having a newly described type of chaetae named spinifalcigers (exhibiting a mixture of falciger and spiniger blades), the base of maxillae II with a small elevation, and the ventral cirri with swollen base as transverse welt with short digitiform tip. Treadwellphysa n. gen. includes a new species, T. yucatanensis n. sp. and three other species previously included in Marphysa: T. amadae (Fauchald, 1977) n. comb., T. languida (Treadwell, 1921) n. comb., and T. veracruzensis (de León-González & Díaz-Castañeda, 2006) n. comb. Some morphological features are evaluated to clarify their variability with respect to specimen size. A key to Eunicidae genera, and keys to species of Marphysa and Treadwellphysa n. gen. from the Grand Caribbean region are given.


9.
- Artículo con arbitraje
Ambaeolothrips: a new genus of Neotropical Aeolothripidae (Thysanoptera), with observations on the type-species from mango trees in Mexico
Mound, Laurence ; Cavalleri, Adriano (coaut.) ; O’donnell, Cheryle (coaut.) ; Infante, F. (coaut.) ; Ortiz, Antonio (coaut.) ; Goldarazena, Arturo (coaut.) ;
Contenido en: Zootaxa 4132 (3): 413–421 Vol. 4132, no. 3 (Apr. 2016), p. 413–421 ISSN: 1175-5334
Resumen en: Inglés |
Resumen en inglés

Ambaeolothrips gen. n. is diagnosed for three Neotropical species: the type species romanruizi Ruiz-De la Cruz et al. comb. n. from Mexico, microstriatus Hood comb. n. from Panama, and pampeanus sp. n. from southern Brazil. Variation is discussed among character states that are used in the generic classification of the family Aeolothripidae, including segmentation of the antennae and maxillary palps, sculpture of the metanotum and presence of sternal discal setae. New field observations on the biology of romanruizi indicate that this species is phytophagous in flowers and on leaves, with no evidence of predation on the larvae of other thrips.


10.
- Artículo con arbitraje
PDF
Resumen en: Inglés |
Resumen en inglés

We analyzed the structure and taxonomic diversity of amphibian communities in a forest-fragmented landscape in central Mexico. Our study was undertaken in remnants of native tropical evergreen forest (TEF), shaded coffee plantations (SCP), and pastures (PAS) to assess richness, turnover, and taxonomic diversity of species among these environments. Our results show a decrease in the number of species from the native forest to the transformed environments. Similarity in species composition was higher between TEF and SCP, and between SCP and PAS. In TEF, we recorded a greater proportion of species of conservation concern at the national and global levels. Many of the species recorded in SCP and PAS may occur in TEF, but TEF holds species requiring conserved environments. Additional studies are needed at a local level to understand the effects of land-cover transformations and the interactions between native vegetation and its surrounding matrix to define appropriate management plans and conservation strategies for highly sensitive biological groups, such as the amphibians.