Se describe Heliopsis suffruticosa de la Sierra de Sombrerete al occidente de Zacatecas, de bosque bajo abierto de piñonero sobre caliza. La especie difiere de otras del género por tener hábito sufruticoso, hojas angostamente lanceoladas a lineares, enteras a espaciadamente serruladas y pedúnculo gradualmente ensanchado hacia el ápice, características que comparte con algunas especies de Zinnia. Se presenta una clave para distinguir entre las especies mexicanas de hábito perenne de Heliopsis. Al igual que en otros representantes de este género, las raíces de H. suffruticosa presentan alcamidas, detectándose en este caso cinco isobutil alcamidas diacetilénicas conjugadas, unidas a un metilo terminal en posición omega.
In order to assess the species richness and diversity of ants in a xerophitic scrubland, a total of three areas were monitored in the Southeast of Durango within the municipalities of Nombre de Dios and Durango. Specific richness, relative abundance as well as Shannon's, Simpson's and Pielou's indices of the ant community were obtained. A total of 19 species from 15 genera within four subfamilies were collected: Myrmicinae, Formicinae, Pseudomyrmicinae and Dolichoderinae. The subfamily with the greatest species richness was Myrmicinae (seven species), while Pseudomyrmicinae had the lowest richness with only two species. Dolichoderinae showed the highest relative abundance (76.5% of the total sample). Four new records of two genera were obtained for the State: Carebara and Linepithema and two species: Atta texana and Myrmecocystus mendax. Shannon's diversity index reached H' = 1.36, Pielou's evenness index was J' = 0.46 and Simpson's index was λ = 0.38. Further targeted studies are required with different sampling techniques in order to obtain a more detailed listing of ants and increase our knowledge on this group of insects in the study region, which shows high diversity potential.
Abstract. Studing the pest and parasites of Apis melifera L., was detected the presence of the ornate cabinet beetle Trogoderma ornatum (Say) associated with honey bee. This is the firts time that T. ornatum is reported for México associated with honey bee, in ore locality at Northeastern of Durango State, México.
Se reportan 115 especies, en 98 géneros de 38 familias botánicas que son fuente de alimento para las abejas (Apis mellifera L.), presentes en dos regiones del municipio del Mezquital, Dgo. y una descripción breve del tipo de vegetación en relación a las especies dominantes, en las localidades donde se realizó el estudio.
Se presenta un listado preliminar de 506 especies en 335 géneros, de 86 familias de flora fanerogámica, derivado de la determinación taxonómica del material recolectado, en Vicente Guerrero, Durango. Así también se describe brevemente el tipo de comunidad vegetal. Se concluye que la familia Asteraceae es la mejor representada cuyo inventario está prácticamente completo.
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