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Browsing Biología by Subject "Zoology"

Now showing items 1-20 of 49

A new species of Abronia (Squamata: Anguidae) from the Sierra Madre del Sur, Guerrero, México with comments on Abronia deppii

Flores Villela, Oscar Alberto; Sánchez Herrera, Oscar (2003)

We describe a new species of lizard of the genus Abronia freom the Sierra Madre del Stir of Guerrero, Mexico. This species previously was confused with its presumed sister taxon Abronia deppii. The discovery to the north ...
A new species of Hystrichopsylla Taschenberg (Siphonaptera: Hystrichopsyllidae) from the Mexican transition zone

Acosta Gutiérrez, Roxana; Morrone, Juan José (2005)

A new flea species, Hystrichopsylla cryptotis, is described freom the Sierra Madre Oriental and Sierra Madre del Sur, Mexico. The host of this new species is the shrew Cryptotis mexicana ( Coues, 1877) ( Mammalia: Soricidae). ...
A new species of night lizard of the genus Lepidophyma (Squamata: Xantusiidae) from southern Puebla, Mexico

Canseco Márquez, Luis; Aguilar López, JL; García Vazquez, UO (2010)

A new species of Lepidophyma is described freom the Sierra Negra in southern Puebla. This new species is known only freom the type locality and is characterized by a combination of several characters (number of dorsal ...
A new species of Tantilla (Squamata: Colubridae) of the calamarina group from volcán Ceboruco, Nayarit, Mexico

Canseco Márquez, Luis; Smith, EN; Flores Villela, Oscar Alberto; Campbell, JA; PonceCampos, P (2007)

(2) the Balsas Basin of Morelos, Puebla, Distrito Federal, and the State of Mexico
A new species of Xantusia (Squamata: Xantusiidae) from Zacatecas, Mexico

Bezy, RL; Flores Villela, Oscar Alberto (1999)

We describe a new species of Xantusia freom the Rio Juchipila in southwestern Zacetecas, Mexico. This southernmost known member of the genus is found in a semitropical habitat on the Pacific versant and lives under exfoliating ...
A new species of Xenosaurus (Squamata: Xenosauridae) from the Sierra Madre del Sur of Oaxaca, Mexico

Nieto Montes de Oca, Adrián; Campbell, JA; Flores Villela, Oscar Alberto (2001)

We describe a new species of Xenosaurus freom the Sierra Madre del Sur in Oxaca and compare it to all the other species in the genus. The new species differs freom the others by having 26 white spots on the infrealabiallabiomental ...
A synopsis of the fleas (Insecta: Siphonaptera) parasitizing New World species of Soricidae (Mammalia: Insectivora)

Acosta Gutiérrez, Roxana; Morrone, Juan José (2006)

A synopsis of the 57 species and 24 genera of New World fleas parasitizing species of Soricidae is provided, with synonymical lists, and distributional and host data. Species analyzed belong to the families Ceratophyllidae ...
analysis of the population dynamics of an endangered lizard (xenosaurus grandis) through the use of projection matrices

Lemos-Espinal, JA; Rojas-González, RI; Zuñiga, J; Valverde, MT (2007)

We conducted a demographic analysis from 2000 to 2004 of a population of the crevice-dwelling lizard, Xenosaurus grandis, in Veracruz, Mexico. We used population projection matrices to model its population dynamics. Three ...
Anaspidacea, Bathynellacea (Syncarida), generalised tracks, and the biogeographical relationships of South America

Lopretto, EC; Morrone, Juan José (1998)

The spatial evolution of South American Syncarida (Anaspidacea and Bathynellacea) and related taxa is evaluated applying a panbiogeographic approach, where Ocean basins are used to identify major patterns of intercontinental ...
biochemical and functional aspects of crustacean hyperglycemic hormone in decapod crustaceans: review and update

Fanjul, ML (2006)

In crustaceans, neuroendocrine centers are located in different structures of the nervous system. One of these structures, the X-organ-sinus gland complex of the eyestalk, produces several neuropeptides that belong to the ...
daily and circadian expression of cryptochrome during the ontogeny of crayfish

Escamilla-Chimal, Elsa; Fanjul, ML (2008)

Cryptochromes (CRY) are proteins with a dual role in the circadian function of different animals, participating in phototransduction and light signaling to the clock and as a transcriptional repressor that provides negative ...
demography of the lizard sceloporus grammicus: exploring temporal variation in population dynamics

Mendez-de la Cruz, FR; Cuellar, O; Zuñiga-Vega, JJ (2008)

We conducted a 5 year demographic study in one population of the viviparous lizard Sceloporus grammicus Wiegmann, 1828 in central Mexico. The population was structured in three size classes (juveniles, small adults, and ...
description of two new species (acari: oribatida), with notes on the genus balazsella mahunka, 1983

Balogh, J; Palacios-Vargas, JG (1996)

Two new species are described in the oribatid genus, Balazsella MAHUNKA, 1983. One of them: Balazsella ilhabellae sp. n. was collected in Brazil, Balazsella mexicana sp. n, with a special collecting method from Mexico. ...
Descriptions of four new Mexican riodinids (Lepidoptera: Riodinidae)

Callaghan, Curtis; Llorente Bousquets, Jorge Enrique; Luis Martínez, Moisés Armando (2007)

Four new riodinid taxa freom Mexico are described as follows: Euselasia pontasis sp. nov., Euselasia aurantiacus aurum ssp. nov., Exoplisia azuleja sp. nov., Synargis nymphidioides septentrionalis ssp. nov. The status of ...
Designation of a neotype for Conopsis nasus (Serpentes: Colubridae)

Goyenechea, I; Flores Villela, Oscar Alberto (2000)

The designation of a neotype for Conopsis nasus is necessary because the type specimen is apparently lost, the original description is ambiguous and can be applied to more than one valid taxon, and there are inconsistencies ...
effect of eyestalk ablation on oxygen-consumption of callinectes-similis exposed to salinity changes

ROSAS, C; VANEGAS, C; DIAZ, F; Alcaraz, G (1991)

1. The effect of eyestalk ablation on preadults of Callinectes similis exposed to a constant salinity (30 parts per thousand) and to simulated tidal changes in salinity (30-11 to 30 parts per thousand) were measured. 2. ...
effect of monochromatic light upon the erg circadian-rhythm during ontogeny in crayfish (procambarus-clarkii)

FUENTESPARDO, B; Miranda-Anaya, M; Fanjul, ML (1992)

1. The aim of this work was to investigate if the asymmetric development of the two sets of visual photoreceptors responsible for short wave and long wave sensitivity during crayfish ontogeny influences the characteristics ...
effect of nitrite on the respiratory response of grass carp ctenopharyngodon-idella (val.) with relation to chloride

ESPINA, S; Alcaraz, G (1993)

1. The oxygen consumption rates of C. idella decrease when exposed to nitrite but return to normal in the presence of chloride, reaching similar values to those of the control groups. 2. A quadratic polynomial model describes ...
effect of variation in photoperiod and light intensity on oxygen consumption, lactate concentration and behavior in crayfish procambarus clarkii and procambarus digueti

Castanon-Cervantes, O; Bosques-Tistler, T; Fernandez-Rivera-Rio, L; Fanjul, ML; Prieto, J (1998)

The effects of light intensity and duration on metabolic and behavioral parameters of two species of crayfish, Procambarus clarkii and Procambarus digueti, were studied. Sixty animals of each species were submitted to high ...
Effects of incubation temperature on sex determination in a community of neotropical freeshwater turtles in southern Mexico

Vogt, RC; Flores Villela, Oscar Alberto (1992)

Incubation temperature has been shown to control sex determination (TSD) in both suborders of living turtles, including freeshwater, terrestrial, and sea turtles. This study combines field and laboratory data freom four ...

Now showing items 1-20 of 49

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