Campsicnemus meyeri Evenhuis

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

Campsicnemus meyeri Evenhuis , sp. nov.

( Fig. 3 )

Diagnosis. Fits closest to C. popeye , sp. nov., by virtue of a swollen area on the mid tibia, but can easily be separated from it by the swollen area bearing multiple clusters of setae (bearing only a single strong seta and dense fine hairs in C. popeye ).

Description. Male. Body length: 2.3–2.4 mm. Wing length: 2.3–2.4 mm. Head: Black; oc and vt black, subequal in length to antennal arista; front, occiput, and vertex black with blue highlights; face constricted at middle, eyes almost holoptic, contiguous below antennae for length of 4 ommatidia; palpus small, dark brown; proboscis brown, extending below eye in lateral view; antennal segments black to brown; postpedicel long, lanceolate, length about 2.5 x width; arista missing in all three specimens. Thorax: Mesoscutum and scutellum brown dorsally, yellowish brown to yellow laterally, pleura yellowish white except for black anepimeron; thoracic setae black: 3 dc; 2 np; 2 ph; 1 pa; 1 sc; ac absent; halter stem and knob yellowish brown. Legs: CI, CIII yellowish white, CI with two strong black setae apically; CII yellowish white, with 2 brown longitudinal stripes medially; femora and tibiae yellowish; tarsi yellowish brown; foreleg unmodified, without MSSC; FII with row of 6 strong black setae ventrally near middle; FIII with 10–12 long hairs ventrally on distal half, 3 shorter curved strong black setae subapically (MSSC); TiII ( Fig. 3 ) contorted, swollen and widest at apical third, with 3 long thick setae mesally at bend of swollen area and single thick, leaflike seta at bend, laterally with single long chaeta at apical one-third, row of smaller stiff hairs laterally, mesally, and mesolaterally; dense patch of peglike setae subapically on mesal surface; apex with single thick leaflike setae mesally and ring of 5–6 thinner stiff hairs (MSSC), smaller black setae and hairs along entire ventral surface. IIt1 short, about 1.5 x length of IIt2, without MSSC. Remainder of leg segments without MSSC. Wing: Pale smoky throughout. Abdomen: Brown with short black hairs dorsally on each tergite, a few longer hairs laterally; tergal interstices whitish; sternites yellowish brown. Hypopygium brown with paler brown cerci, not dissected. Female. As in male except for lack of MSSC.

Types. HOLOTYPE ♂ (BPBM Type 16,651) from FRENCH POLYNESIA: Society Is: TAHITI NUI: Mt. Marau, 1170 m, 10.v.2006, Malaise, E. Claridge [BPBM1013235]. PARATYPES: FRENCH POLYNESIA: Society Is: TAHITI NUI: 1 ♂ [BPBM 101236], 2 ♀ [BPBM 101237], Papenoo Valley, stream below Marato Hotel, 16.vii.2006, P. O’Grady. TAHITI ITI: 1 ♂ [BPBM 101304], Taiarapu above Vaiufaufa, 900 m, 24–25.ix.1977, S.L. Montgomery. Holotype and paratypes in BPBM.

Etymology. Named for Dr. Jean-Yves Meyer, in thanks for his assistance during our fieldwork in Tahiti and in recognition of his efforts at promoting and fostering research on the fauna and flora of French Polynesia.

Figures

FIGURES 3 – 4. Campsicnemus male mid legs, left leg, lateral view. 3. C. meyeri Evenhuis, sp. nov., femur and tibia 4. C. pectinatus Evenhuis, sp. nov. a. light microscope image of tibia, showing two long apical setae. b. scanning electron image of tibia showing “ pecten ” of thick setae. Scale bars for 3 a, b, 4 a = 0.1 mm; bar for 4 b = 0.05 mm.