Six new species and new records of the genus Desmopachria Babington (Coleoptera: Dytiscidae: Hyphidrini) from Brazil and redescription of D. varians Wehncke, 1877 Braga, Rafael Benzi Papéis Avulsos de Zoologia 2018 2018-10-02 58 1 15 8LZND Braga, 2018 Braga 2018 [985,1282,602,627] Insecta Dytiscidae Desmopachria Animalia Coleoptera 6 7 Arthropoda species yanomami sp. nov.   ( Figures 4A-L)   Diagnosis:Small size for the genus 1.3-1.4 mm. Male median lobe triangular ( Fig. 4J-K); Lateral lobe with the apical half divided in two flat and broad ramus; dorsal rami short and less wide, ventral rami with a apex truncated and a tuft of small setae near of outer angle ( Fig. 4I).   Description: Holotypemale: total length 1.4 mm; maximum width of body 0.9 mm; elytral length 0.9 mm; maximum width of the pronotum 0.3 mm.  Colouration ( Figs. 4A-C):Head yellow; pronotum yellow with base dark brown; each elytron dark brown with scattered yellow maculae in laterals ( Figs. 4A-B). Venter yellow ( Fig. 4C).  Structure and sculpture:Body rounded. Head and pronotum with very fine, shallow scarcely distributed punctures; each elytron with very fine, shallow and densely distributed punctures. Anterior clypeal margin thin, translucent and up-turned; Antennae with very rounded scape longer than two antennomeres united, pedicel narrower with same length of scape, antennomeres 5-9 slightly expanded in apical half. Pronotum short and wide, with lateral bead and without basal striae; prosternal process broad, apically rounded, shallowly concave. Elytral suture without margin. Ventral surface of metatibia covered with short and wide spines. Apical ventrite with a very fine transversal line ( Fig. 4D).  Male genitalia ( Figs. 4E-L):Median lobe in dorsal view narrowing toward to pointed apex ( Fig. 4J); in lateral view almost triangular with a convexity on ventral margin of base ( Fig. 4K). Lateral lobe with the apical half divided in two flat and broad rami ( Figs. 4F-H), dorsal rami short and less wide, ventral rami with a apex truncated and a tuft of small setae near of outer angle ( Fig. 4I); in lateral view lateral lobe almost triangular shaped slight bended to ventral side ( Fig. 4L).  Intraspecific variation:Anterior clypeal margin sexually dimorphic, beaded in female and not conspicuously translucent. Total length 1.3-1.4 mm; maximum width of body 0.9-1.0 mm; maximum width of the pronotum 0.8-1.0 mm.   Type material:  Holotypemale: “ Brasil, Amazonas, Barcelos,/ Igarapé do Tabocal,/ 00°00’57”S, 62°48’38”W,/  08.viii.2009, Ferreira-Jr N. & Nessimian, J.L., AJ17[paper white label]”, “5955 [plastic blue label]” “ HTYPE[plastic red label]” ( DZRJ). Paratypes: “ Brasil, Amazonas, Barcelos,/ Igarapé do Tabocal,/ 00°00’57”S, 62°48’38”W,/ 08.viii.2009, Ferreira-Jr N. & Nessimian, J.L., AJ17 [paper white label]”, “5956 [plastic blue label]”, “ PTYPE[plastic red label]” ( 35 exs.) ( DZRJ).  Taxonomic notes:This new species belongs to the  D. ubangoidesgroup sensu Miller (2001)having the anterior clypeal margin sexually dimorphic, males being strongly modified, thin, translucent and strongly upturned, and being anteriorly beaded in the female. This species is near  D. minuta Young 1980in colour pattern and in the shape of the genitalia, but can be separated from it by the bigger size, presence of transversal suture on last sternite, a character only shared in this group with  D. ubangoides,and the apex of the male median lobe being pointed instead of bifurcated and dorsal rami of lateral lobe are broad instead of slender.   Etymology:The species name refers to masculine and feminine noun “Yanomâmi”, the name of the indigenous people present in the area of origin of the typematerial. It is a noun in the nominative singular standing in apposition.  Geographic distribution:Known only from the Amazonas State of Brazil. 2009-08-08 HTYPE, DZRJ Brazil Igarape do Tabocal -0.015833333 Amazonas 21 -62.810555 Barcelos 8 9 AJ17 1 holotype