Campsicnemus elinae Evenhuis

Evenhuis, Neal L., 2013, The Campsicnemus popeye species group (Diptera: Dolichopodidae) from French Polynesia, Zootaxa 3694 (3), pp. 271-279 : 274-275

Campsicnemus elinae Evenhuis , sp. nov.

( Fig. 2 )

Diagnosis. Of those in the popeye species group, fits with those species that possess a long antennal postpedicel (length more than 2.5 times width) and having the mid basitarsus length more than 2 times the length of the second tarsal segment (i.e., C. elinae , C. meyeri , and C. popeye ). It differs from C. meyeri and C. craigi in the vestiture of the male mid tibia in possessing a small patch of hairs mesally on the basal third and a conspicuous patch of long hairs apically (these patches of hairs absent in C. popeye and C. craigi ).

Description. Male. Body length: 1.8–2.5 mm. Wing length: 2.2–2.8 mm. Head: Black; oc and vt black, about one-third length of antennal arista; face constricted at middle, eyes holoptic, contiguous below antennae for length of 3–4 ommatidia; palpus small, dark brown; proboscis brown, extending below eye in lateral view; antennal segments dark brown; postpedicel long, lanceolate, length about 2.5 times width; arista slightly longer than head height. Thorax: Dorsum of mesoscutum, scutellum, and mediotergite dark brown, paler brown laterally; pleura yellowish except for brown laterotergite and anepimeron; thoracic setae black: 1 + 3 dc; 2 np; 2 ph; 1 pa; 1 sc; ac absent; halter stem white, knob pale brownish. Legs: CI, CIII yellowish white, CI with three strong black setae apically; CII yellowish brown; FI and FII yellowish brown, FIII yellowish brown ventrally and mesally, brown dorsally and laterally; remainder of legs brown; foreleg and hindleg unmodified, without MSSC; FII with two rows of strong black setae: on with 5–6 long black setae of subapical one-third; one as a dense patch of 5–6 smaller black setae lateroventrally on subapical one-fourth; TiII ( Fig. 2 ) slightly twisted and flared, widest apically, apical onefourth kinked and folded over bearing dense patch of 4–5 very long black setae, paired rows of 4 dense short black setae on subapicomesal one-fourth, single thick strong long black chaeta at apical one-third, row of stiff setae laterally on basal half (MSSC), smaller black setae and hairs along entire ventral surface, single strong black seta mesoapically. IIt1 long, longer than TiII, about 2.5 x length of IIt2, without MSSC. Wing: pale smoky throughout. Abdomen: Brown, darker brown posteriorly forming transverse bands, with short black hairs dorsally on each tergite, a few longer hairs laterally, longest on tergite I; sternites brown. Hypopygium brown, not dissected. Female. As in male except for lack of MSSC; antennal postpedicel subtriangular, length subequal to width.

Types. HOLOTYPE ♂ (BPBM Type 16,637) [BPBM1013172], and 1 ♂ (headless) [BPBM 101317], 3 ♀ [BPBM1013174] PARATYPES from FRENCH POLYNESIA: Society Is: TAHITI NUI: Mt. Mauru, Faatautia, 730 m, 17°37'45"S, 149°21'10"W, riparian habitat above and below lava tube, 19.vii.2006, N. Evenhuis, P. O’Grady. Holotype and paratypes (all preserved in ethanol) in BPBM.

Remarks. Holotype male with top of head cracked open and brain matter partially extruded; left antenna broken off and missing. The kink/folding at the apex of the mid tibia appears to be an artifact of drying but all three male specimens at hand never left a fluid preservation immediately after collecting and all show this feature, so it may actually be present in life.

Etymology. This species is named for Elin Teuruarii (née Claridge) for her expert help in coordinating Malaise trap collecting, fieldwork logistics, and specimen data for the French Polynesian arthropod survey.

Figures

FIGURES 1 – 2. Campsicnemus male mid legs. 1. C. craigi Evenhuis, sp. nov.; a. femur and tibia, left leg, mesal view; b. tibia and two basalmost tarsi, left leg, lateral view. 2. C. elinae Evenhuis, sp. nov., femur and tibia, left leg, mesal view. Abbreviations: IIt 1 = midleg basitarsus; TiII = midleg tibia. Scale bars = 0.1 mm.