Biologia

There are 16 freshwater mollusc families reported from Mexico, but besides a few studies of habitat and distribution, only Pomacea flagellata, Pomacea patula catemacensis and Helisoma trivolvis has been studied in some detail, mainly regarding reproduction. In Mexico, the parasite Fasciola hepatica is transmitted by Lymnaea obrussa, L. humilis and L. cubense). Larval trematodes have been found in Planorbidae, Physidae, Lymnaeidae, Ancylidae and Pisidiidae. Diet and growth have been studied for Lymnaea bulimoides, L. cubensis and L. humilis. Piquerol A extracted from Piqueria trinervia acts as molluscicide. There are reports about freshwater molluscs as pollution bioindicators and as source of food, foreing currency and lime. Mexican freshwater molluscs are an endangered resource.

This paper presents and compares different TE information dissemination strategies between Path Computation Elements (PCEs) in multi-domain optical networks. In such network context, recent studies have found that path computation only with local domain visibility yields poor network performance. Accordingly, certain visibility between domains seems necessary. Aiming to fit the confidentiality requirements of the composing domains while improving the final network blocking probability, novel link aggregation techniques have been proposed, which summarize the state of network domains resources efficiently. This aggregated link information is afterwards disseminated to all the remainder domains in the network. To this end, we introduce different update triggering policies to make a good trade-off between routing information scalability and inaccuracy. The performance of all contributions has been supported by illustrative simulation results.

Resumen. Se presenta una revisión general de la familia Chrysomelidae en México. Existen 2 174 especies y 301 géneros conocidos para el país. Caloscelis Clark y Euplectroscelis Crotch son géneros endémicos de México, así como 31 especies de Blepharida Chevrolat. Las entidades donde se ha registrado el mayor número de especies son Veracruz (694), Oaxaca (428) y Guerrero (348).

in the leaves of Larrea tridentata. In the present study the potential protective effect of NDGA on ischemia-reperfusion (I/R) induced renal damage, oxidant stress and mitochondrial alterations was examined. Four groups of male Wistar rats were used: 1. Control; 2. NDGA; 3. I/R, and 4. I/R+NDGA. NDGA was injected i.p. (10 mg/Kg/day) starting 48 h before I/R. NDGA was able to prevent the following alterations induced by I/R: (a) renal dysfunction (evaluated by measuring blood urea nitrogen and plasma creatinine), (b) renal histological damage (quantified by automated morphometry), (c) oxidant stress (evaluated by immunohistochemical analyses of 3-nitrotyrosine, 4-hydroxynonenal and malondialdehyde), (d) decrease in the activity of the renal antioxidant enzymes glutathione peroxidase, glutathione reductase, glutathione-S-transferase and catalase, (e) decrease in state 3 mitochondrial oxygen consumption, (f) decrease in the activity of mitochondrial complex I and (g) increase in the mitochondrial content of 4-hydroxynonenal and malondialdehyde. It is concluded that the renoprotective effect of NDGA pretreatment on I/R-induced renal damage was associated to the preservation of antioxidant enzymes and to the prevention of oxidant stress and mitochondrial alterations.

We report for the first time the consumption of the Texas Banded Gecko (Coleonyx brevis) by the Banded Rock Rattlesnake (Crotalus lepidus klauberi) in southwestern Coahuila de Zaragoza, Mexico. We consider that this event might be more widespread given the broad sympatry of both species, albeit rarely documented.

El género Drymobius (Squamata: Colubridae) consta de cuatro especies actualmente descritas que se distribuyen desde el sur de Texas, Estados Unidos hasta Venezuela en la vertiente Atlántica y desde el estado de Sonora, México hasta Perú en la vertiente Pacífica (Wilson, 1975a). Dentro del género, D. chloroticus es una de las especies con distribución amplia en Mesoamérica, abarcando desde San Luis Potosí, México en el Atlántico (Wilson, 1970) y desde Guerrero, México por el Pacífico (Mendoza-NOTA DE DISTRIBUCIÓN

GEOGRAPHIC DISTRIBUTION 801 2021. T. T. Chau. Verified by Gernot Vogel. Herpetological Collection, Duy Tan University (DTU 535; photo voucher). Individual found at ca. 0700 h dead after being bitten by domestic dog; surrounding habitat was shrubland. First record for Dong Nai Province; currently represents southernmost distribution limit, ca. 63 airline km northeast from nearest previously known population in Gung Re Commune,

Although Guerrero contains one of the richest herpetofaunas of any state in Mexico, it remains one of the least studied. Pérez-Ramos et al. (2000) provided the last review of the herpetofauna of the state, and since that time several new species have been described, new records have been reported, and other updates are pending (R. Palacios-Aguilar and O. Flores-Villela, unpublished). After an exhaustive examination of specimens collected by students and teachers from the Universidad Autónoma de Guerrero during the course "Biología de Campo" from 2000 to 2015, herein we report new distributional records for five species (four reptiles, one amphibian) in the state, including a new state record (see Fig. 1). The symbolic codes for museum collections below follow Sabaj Pérez (2014).

Alligator lizards of the genus Abronia are a clade of arboreal and terrestrial squamates distributed throughout much of the highlands of Mexico and Central America. Here, we report a new record of the Mexican endemic A. martindelcampoi that represents the easternmost limit of the species and the lowest known elevational record. We briefly discuss the biogeographical hypotheses that have been proposed in the past concerning this and other related genera.

(IBH-RF 647; photo voucher). A young adult Cantil (760 mm total length) was found DOR in a patch of vegetation composed of grassland-mesquite and corn and sugarcane surrounded by native tropical deciduous forest. First municipality record, with the closest known record located ca. 54.55 km to the northwest in the Municipality of Zapopan, 22 km north northwest of Guadalajara, Jalisco (Arenas-Monroy and Ahumada-Carrillo 2015. Mesoamer. Herpetol. 2:371-374). Thanks to Adriana González for cataloging the voucher photograph.

Other Contributions Miscellaneous Notes Acknowledgments.-We thank Ildefonso Andrade-Gutiérrez for his valuable field assistance, and Luis Canseco-Márquez for verifying the identification of the species. The scientific collector permit was SEMARNAT FAUT 0186. Literature Cited AlvArAdo-díAz, J., i. suAzo-orTuño, l. d. wilson, And o. mEdinA-AGuilAr. 2013. Patterns of physiographic status of the herpetofauna of Michoacán, Mexico. Amphibian and Reptile Conservation 1: 128-170. buCklEy, l. J., k. dE quEiroz, T. d. GrAnT, b. d. HollinGsworTH, J. b. ivErson, s. A. pAsACHnik, And C. l. sTEpHEn. 2016. A checklist of the iguanas of the world (Iguanidae; Iguaninae). Herpetological Conservation and Biology 11 (Monograph 6): 4-46.