A new diploid species belonging to the odontophrynus americanus species group (Anura: Odontophrynidae) from the espinhaço range, Brazil

Abstract

The Odontophrynus americanus species group is a complex of diploid and tetraploid species hardly distinguished by mor-phological characters. It currently consists of three allopatric diploid species (i.e. O. cordobae, O. lavillai, and O. maisuma) and one widely distributed tetraploid species (i.e. O. americanus). We herein describe a new diploid allopatric species from campo rupestre, a typical phytophysiognomy of the Espinhaço Range, Brazil. The new species is distinguish-Able by the diploid complement of 2n 2x 22 chromosomes, small to medium-sized dorsal dark brown blotches with low contrast on a light brown background, light mid-dorsal stripe absent or greatly interrupted in most specimens with yellowish coloration as the background of both head and flanks of the body, advertisement call with dominant frequency of 840-1080 Hz, pulse rate of 90.5-106.7 pulses/s, and small tadpoles (TL 24.30-35.69 mm).