Ilyocryptus cuneatus brasiliensis Kotov & Elmoor-Loureiro, 2008

Sub-ovoid body, dorsal keel present but not developed, molting incomplete; setae on the posterior margin of valves armed with relatively long and slender setae, spines unilaterally inserted, without setulae; posteriormost setae on the valves armed with setulae. Head triangular shaped, fornices prominent, projection on the mandibular articulation present; dorsal pore high in relation dorsal line. Postabdomen relatively short, preanal part longer than postanal;5-10 marginal denticles on the preanal part, duplicated; anal part short with 5-6 short lateral setulae; seven marginal spines on the postanal part; distalmost part of postanal part with 4-5 rudimentary lateral setae, up seven lateral setae which are slightly longer than marginal spines; basal spines on the postabdominal claw of similar length.

Comments: Ilyocryptus cuneatus brasiliensis is the only Neotropical taxon of a group composed almost exclusively of Palearctic species. This appears to be rare, with a range restricted to two localities in the state of São Paulo, belonging to the Paraná River Hydrographic Basin (Fig. 3A). For further information concerning the morphology of this taxon and its differentiation from other subspecies occurring in other zoogeographical zones, see Kotov & Elmoor-Loureiro (2008).