Especies nocturnas de Scarabaeoidea (Coleoptera: Polyphaga) en el norte de Sinaloa, México Translated title: Nocturnal species of Scarabaeoidea (Coleoptera: Polyphaga) in northern Sinaloa, Mexico

Abstract

Con la finalidad de inventariar la fauna de escarabajos lamelicornios en el norte de Sinaloa, entre julio y diciembre de 2008 se realizaron colectas con trampas de luz en tierras de cultivo, bosque caducifolio, bosque espinoso y matorral xerófilo, establecidos entre los 8 y 84 m de altitud en ocho localidades de los municipios de Ahome y El Fuerte, Sinaloa. Se obtuvieron 38.619 ejemplares que representan a 29 especies de los géneros Phyllophaga, Diplotaxis, Paranomala, Pelidnota, Cyclocephala, Dyscinetus, Strategus, Xyloryctes, Ligyrus, Oxygrylius, Megasoma, Omorgus, Copris, Digitonthophagus, Dichotomius, Hybosorus y Ptichopus. La mayor riqueza correspondió a Phyllophaga, representado por 10 especies, entre las que predomina Phyllophaga opaca. Las especies mas abundantes en las zonas de estudio fueron: Cyclocephala sinaloae (45,06%), Oxygrylius ruginasus (28,66%), Phyllophaga opaca (25,03%) y Ph. cristagalli (0,24%). La mayor abundancia de todas se presentó en julio (51,38%) lo cual coincidió con el inicio del periodo de lluvias. La mayor riqueza se observó en el Cerro de las Microondas, con 17 especies capturadas. Phyllophaga yaqui, Diplotaxis ambigua, Dyscinetus picipes y Xyloryctes corniger se registran por primera vez para el estado de Sinaloa.

Translated abstract

Abundance and richness of nocturnal species of Scarabaeoidea in northern Sinaloa, were recorded by mean of light traps operated during July to December, 2008. Samples were obtained in cultivated lands, tropical deciduous forest and xeric scrub of eight localities of municipalities of Ahome and El Fuerte, located between 8 and 84 m of elevation. A total of 38,619 specimens belonging to 29 species of the genera Phyllophaga, Diplotaxis, Paranomala, Pelidnota, Cyclocephala, Dyscinetus, Strategus, Oxygrylius, Megasoma, Dichotomius, Copris, Digitonthophagus and Hybosorus were collected. Phyllophaga was the richest genus, with 10 species, among them Phyllophaga opaca was predominant. The most abundant species were: Cyclocephala sinaloae (45.06%), Oxygrylius ruginasus (28.66%), Phyllophaga opaca (25.03%) and Ph. cristagalli (0.24%). The highest number of scarab beetles (51.38%) was collected during July, coinciding with beginning of the rainy season. The locality with the greatest scarab richness was Cerro de las Microondas, where 17 species were collected. Phyllophaga yaqui, Diplotaxis ambigua, Dyscinetus picipes and Xyloryctes corniger, are recorded for the first time in the state of Sinaloa.