NEW AQUATIC Sminthurides Börner SPECIES (COLLEMBOLA: SMINTHURIDIDAE) FROM TABASCO, MEXICO

Complement to the diagnosis of Sminthurides Börner is given and illustrated with Scanning Electron Microscopy (SEM) photos, and a new Mexican species of this genus is described with specimens from Tabasco State. It belongs to penicillifer group, characterized by the presence of two trichobothria on second antennal segment. Males of the new species are distinguished by a triangular cavity in Ant II and a reduced labial chaetotaxy, females with Ant. IV subdivided into 9 subsegments and abundant labial chaetotaxy. A discussion of the variability of some characters, as teeth and empodial filament of unguis III are discussed and illustrated, and the use of new morphological structures, as postlabial chaetotaxy and setation of ventral Abd. IV for the taxonomy of this genus are proposed and included in this contribution.