Oreodytes okulovi LAFER , 1988

Fery, H. & P. N, 2014, Notes on the identity of Oreodytes okulovi LAFER, 1988 (Coleoptera: Dytiscidae), Linzer biologische Beiträge 46 (2), pp. 1241-1254 : 1243-1244

Redescription of Oreodytes okulovi LAFER, 1988

Habitus and colouration

D o r s a l s u r f a c e: Habitus oval ( Fig. 1 ); maximum width (MW) situated distinctly behind anterior third of elytra, near middle of elytral length; body outline with slight discontinuity at bases of pronotum and elytra. Upper surface of silky appearance, neither shiny nor distinctly matt, to large extent brownish yellow. Head on vertex and near inner sides of eyes diffusely darkened. Antennomeres beginning with fifth or sixth weakly brownish darkened distally, eleventh with distal half darkened. Base of pronotum narrowly and anterior margin broadly brownish darkened; centre of pronotum with diffusely delimited brownish spot, sometimes reaching base; lateral rim of pronotum brown. Elytron with suture and six discal vittae blackish; sutural vitta reaching base of elytron and continued parallel to base until its middle, slightly broadened in apical fourth of elytron; discal second and fourth vittae anteriorly longer than first and third, in some specimens reaching base of elytron; short fifth vitta present at midlength of elytron, short sixth vitta parallel to elytral margin in apical third; fifth and fourth vittae fused, third and fourth vittae in some specimens fused posteriorly and also fused with sixth vitta.

V e n t r a l s u r f a c e: In mature specimens chiefly black; mouthparts brownish yellow, gula dark brown; prosternum largely black; hypomeron, propleuron and pro- and mesocoxae brownish yellow; prosternal process (blade), legs, epipleura in anterior half, lobes of metacoxal processes and first abdominal ventrite brownish; hind margins of second to fifth abdominal ventrites shining through brownish.

Figures

Figs 1-2. Habitus of (1) Oreodytes okulovi LAFER, 1988 and (2) O. sanmarkii sanmarkii (C.R. SAHLBERG, 1826) (both specimens from Lazovsky Nature Reserve, Russian Far East).