Oedematopus moraviensis, Naglis, Stefan M., 2011

Naglis, Stefan M., 2011, Revision of the genus Oedematopus (Diptera, Dolichopodidae) with the description of a new genus and a key to the Neotropical genera of Hydrophorinae, Zootaxa 2756, pp. 40-52 : 44-45

Oedematopus moraviensis sp. nov.

( Figs. 1 B, 3)

Type material. COSTA RICA: HOLOTYPE ɗ: “ Costa Rica, San Jose, Zurqui de Moravia, 1600 m, vi/1996, P. Hanson” [ INBio].

Description. Male. Habitus very similar to Oedematopus crassipes . Head: Face with dense silvery-white pruinosity, ratio narrowest distance between eyes to distance between ocellar setae = 10; ratio height of face and clypeus to narrowest distance between eyes = 3.0; palpus dark with silvery-white pruinosity, with short brown hairs, and 1 long pale apical hair; antenna dark brown; scape about twice as long as pedicel; pedicel about as long as high; first flagellomere ovate and about as long as high; arista dorsal, bare; frons with dark brown pruinosity above antennae and with silvery-white maculation along eye margin; vertex black with metallic reflections; pair of relatively short ocellar setae present; upper postoculars short and uniseriate, lower long, white and multiseriate. Thorax: Metallic green ground color of mesonotum mostly covered with dense black pruinosity with purplish reflections, and with silvery-white pruinosity on area of anterior dc and on postpronotum; acrostichal setae absent; 6 dc present decreasing in size anteriad and posteriormost very weak; scutellum with dense brown pruinosity, with pair of strong marginal setae, but without smaller additional setae; pleuron with dense grayish pruinosity; propleuron with fine hairs. Legs: All legs including coxae dark, femora with metallic green reflections and with grey pruinosity, trochanters partially yellow; CI with vertical row of long pale hairs, and with black apical spine-like setae; FI anteriorly and posteriorly with dense long pale hairs on basal half (MSSC); TI and It1-4 with ventral pile; TI with some very weak dorsal setae; FII with very weak spine-like av setae on basal 2/3 and with field of same spine-like setae apically (MSSC), and with row of short pale pv hairs along entire length (MSSC); TII with 2 small ad and pd setae; IIt1 with ventral pile; FIII with ventral mulitseriate row of very short spine-like setae along entire length (MSSC); TIII strongly swollen, about 2.0 times as wide as FIII, with dense short hairs (MSSC). All claws well developed, pulvilli absent. Relative podomere ratios: I: 50:47:27:7:5:4:10; II: 62:71:58:9:5:4:9; III: 77:102:28:20:10:6:9. Wing: With brownish tinge; R4+5 curved posteriad before wing apex; cross-vein dm-cu parallel to posterior wing margin and longer than distal section of M ( Fig. 1 B); RMx ratio: 2.0; CuAx ratio: 7.2; lower calypter pale yellow, with brown rim and fan of brown setae; halter stem dark yellow, knob pale yellow. Abdomen: Male genitalia ( Fig. 3 ): lateral epandrial lobe narrow, with 1 apical and 1 subapical seta; median epandrial lobe short and curved apically; Vsur with 3 spine-like setae; Dsur only slightly curved, with two arms, lateral arm with 1 strong flattened apical seta, median arm with 3 small setae subapically; cercus narrowed apically, with long curved dorsal setae. Female: Unknown.

Etymology. The new species is named after the collecting site Zurqui de Moravia in Costa Rica.

Remarks. Oedematopus moraviensis and O. crassitibia are very similar, show the same MSSCs, and probably are sister-species. It is also remarkable that both species were collected at the same collecting site and date.

Figures

FIGURE 1. Posterior part of wing: (A) Oedematopus crassitibia Van Duzee; (B) Oedematopus moraviensis sp. nov.; (C) Oedematopus vidua (Becker); (D) Oedematopiella sarae sp. nov. (scale bare = 0.5 mm).

FIGURE 3. Oedematopus moraviensis sp. nov., male genitalia, left lateral view (scale bare = 0.1 mm).