Identification key for the Brazilian species and subspecies of the family Ilyocryptidae (Crustacea, Branchiopoda, Anomopoda) Author Sousa, Francisco Diogo Rocha Author Elmoor-Loureiro, Lourdes Maria Abdu text Papéis Avulsos de Zoologia 2019 2019-05-15 59 1 8 journal article 6037 10.11606/1807-0205/2019.59.23 9209b35f-437f-4238-b4a6-c4d00a2aa10b 1807-0205 4613798 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) .