Paraclius crassatus Zhang & Yang & Grootaert 2007, new species
Creators: name: Zhang, Lili
name: Yang, Ding
name: Grootaert, Patrick
Publisher: name: Zenodo
Year: 2007
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Diptera
Dolichopodidae
Paraclius
Paraclius crassatus

description: Paraclius crassatus, new species   
(Figs. 8–12)  
  Material examined. –  Holotype: male, Sungei Buloh, 11 May.2005, Mal. 1 (25159, coll. P. Grootaert, det. LZ, Si 815, ZRC).   
Paratypes: SINGAPORE: 1 male, Sungei Buloh, 27 Apr.2005, Mal. 2 (25096, coll. PG, det. PG, Si 1235), 1 male, Sungei Buloh, 11 May.2005, Mal. 1 (25159, coll. P. Grootaert, det. LZ, Si 815); 2 males, 11 May.2005, Mal. 2, (25160, coll. PG, det. LZ, Si 1242; deposited in IOZ); 1 male, 25 May.2005, Mal 1 (25164, det. PG, Si 1214); 1 male, 10 Jun.2005, Mal. 2 (25168, coll. PG, det. PG, Si 1228); 1 male, 15 Jun.2005, Mal. 2 (25170, coll. PG, det. PG, Si 1251); 1 male, 6 Jul.2005, Mal. 1 (25197, coll. PG, det. PG, Si 1294); 1 male, 3 females (not sure if females are conspecific), 5 Aug.2005, Mal. 1 (25284, coll. PG, det. PG, Si 1264); 1 male, 5 Aug.2005, Mal. 2 (25285, coll. PG, det. P.G., Si 1266); 1 male, 14 Oct.2005, Mal. 1 (25393, coll. PG, det. PG, Si 1273); 1 male, 28 Oct.2005, Mal. 1 (25406, coll. PG, det. PG, Si 1221).  
  Diagnosis. –  Antenna with first flagellomere 1.6–1.7 times as long as wide. Mid femur with 2 long av (longer than femur is wide) and 3 ventral bristles basally, and 4 short spine-like short ventrals. Cercus with subapical notch bearing a strong pale bristle.   
  Description. –  Male: Body length 4.0– 4.2 mm, wing length 3.9–4.0 mm.   
Head metallic green with pale grey pollen. Face narrowing downward, distinctly narrower than first flagellomere. Mid and lower postocular bristles (including posteroventral hairs) pale. Antenna (Fig. 9) dark brown except scape somewhat pale, first flagellomere 1.6–1.7 times as long as wide; arista apicodorsal, minutely pubescent with very short basal segment. Proboscis blackish brown with black hairs, palpus blackish brown with black hairs and black apical bristle.  
Thorax metallic green with pale grey pollen. Hairs and bristles black. Six strong dc, 8 pairs of acr; scutellum with 6 bristles (lateral pair longest). Propleuron with 1 black bristle at lower part. Legs yellow, fore coxa yellow, mid and hind coxae black except narrow apex. Mid femur slightly concave basally. Hind femur with black tip. Fore tarsus from tip of tarsomere 3 onward brown; mid tarsus from tip of tarsomere 1 onward black; hind tarsus black except basal half of tarsomere 1. Hairs and bristles black. Mid and hind coxae each with 1 exterior bristle. Mid and hind femora each with 1 preapical bristle. Mid femur (Fig. 10) with 2 long black av (longer than femur is wide) and 3 short v basally, and 4 short spine-like v. Fore tibia with 3 ad and 2 pd, apically with 2 short bristles; mid tibia with 4 ad, 3 pad and 1 av, apically with 4 bristles; hind tibia with 4 ad and 4 pd, apically with 3 bristles. Hind tarsomere 1 with 1 v at base. Relative lengths of tibia and 5 tarsomeres LI 1.6: 0.9: 0.35: 0.25: 0.2: 0.2; LII 2.4: 1.0: 0.75: 0.65: 0.35:0.2; LIII 2.5: 0.7: 1.5: 0.6: 0.4: 0.25. Wing (Fig. 8) hyaline, veins brown, R 4+5 and M distinctly convergent; CuAx ratio 0.7. Squama yellow with black hairs. Halter yellow.  
Abdomen metallic green with pale grey pollen. Hairs and bristles black. Male genitalia (Fig. 11–12): Epandrium longer than wide, lateral lobe with 3 bristles; cercus large, with weak subapical notch, bearing a strong pale bristle; aedeagus with denticles; hypandrium thick.  
Female: Unknown.  
  Distribution. –  Singapore.   
 Etymology. – The specific name refers to the pale strong bristle in the subapical notch of the cercus.   
  Remarks. – Paraclius crassatus  is somewhat similar to P. incisus Yang & Grootaert, 1999, from Yunnan having the cercus with an apical notch, but may be separated from the latter by the scutellum with 6 bristles (the lateral pair longest) and the cercus has a pale strong bristle in the subapical notch. In P. incisus, the scutellum has only one pair of strong bristles, and the cercus has no pale strong bristle in the sunapical notch (Yang & Grootaert, 1999).
description: Published as part of Zhang, Lili, Yang, Ding & Grootaert, Patrick, 2007, Paraclius (Diptera: Dolichopodidae: Dolichopodinae) Of Singapore, With New Species From Mangroves, pp. 49-62 in Raffles Bulletin of Zoology 55 (1) on pages 53-54, DOI: 10.5281/zenodo.5454637