Thinophilus simplex, Grootaert, 2018

Grootaert, Patrick, 2018, Revision of the genus Thinophilus Wahlberg (Diptera: Dolichopodidae) from Singapore and adjacent regions: A long term study with a prudent reconciliation of a genetic to a classic morphological approach, Raffles Bulletin of Zoology 66, pp. 413-473 : 457

Thinophilus simplex sp. nov.

(Figs. 44–47)

Material examined. Holotype male, SINGAPORE, Sungei Buloh , mangrove, 27 November 2003 (sample 23090, leg. P. Grootaert) . Paratypes: 1 male of same provenance as holotype; 1 male, Sungei Buloh , 9 December 2002 (sample 22057, leg. P. Grootaert) . 2 males, 4 females, Pulau Ubin (Singapore), Chek Jawa, 2 December 2003, Malaise trap in mangrove (sample 23097; leg. P. Grootaert) ; 1 male, Sungei Buloh , mangrove, 11 May 2005, (reg. 25159, Si 809, leg. PG) ; 3 females, mangrove, 11 May 2005, (reg. 25159, Si 1672, leg. PG) ; 1 male, mangrove, 1 June 2005, (reg. 25166, Si 1415, leg. PG) ; 1 female, mangrove, 1 June 2005, (reg. 25165, Si 1460, leg. PG) ; 1 male, 1 female, mangrove, 10 June 2005, (reg. 25167, Si 1245, leg. PG) ; 5 males, 3 females, mangrove, 6 July 2005, (reg. 25199, Si 878, leg. PG) ; 1 male, mangrove, 15 July 2005, (reg. 25262, Si 1789, leg. PG) ; 2 females, mangrove, 16 September 2005, (reg. 25354, Si 1187, leg. PG) ; 1 female, mangrove, 14 October 2005, (reg. 25394, Si 1703, leg. PG) ; 1 male, 1 female, Pulau Ubin , Chek Jawa, mangrove, 2 December 2003, (reg. 23097, Si 116, leg. PG) ; 2 females, mangrove, 11 December 2003, (reg. 23119, Si 137, leg. PG) ; 10 males, 14 females, mangrove, 26 March 2005, (reg. 25031, Si 534, leg. PG) ; 4 males, females, mangrove, 12 September 2005, (reg. 25343, Si 1044, leg. PG) ; 2 males, 3 females, mangrove, 12 September 2005, (reg. 25342, Si 1045, leg. PG) ; 7 males, 1 female, mangrove, 11 October 2005, (reg. 25380, Si 1083, leg. PG) ; 11 males, 14 females, mangrove, 26 October 2005, (reg. 25399, Si 1139, leg. PG) ; 2 males, 4 females, mangrove, 22 December 2005, (reg. 25456, Si 1376, leg. PG) ; 1 male, mangrove, 30 December 2005, (reg. 25474, Si 1439, leg. PG) ; 2 males, 1 female, mangrove, 30 December 2005, (reg. 25475, Si 1443, leg. PG) .

More records are given in Annex 1. Fig. 45. Thinophilus simplex sp. nov., male. A, Antenna; B, Fore coxa, femur, and tibia; C, Fore tarsomeres.

Etymology. The name refers to the simplicity of the bristling of the legs, more precisely all femora lack distinct ventral bristles.

Diagnosis. Medium-sized species with yellow palpus; antennae yellow; only tip brownish and lateral rim of second segment; third antennal segment higher than long, with a small apical tip; arista subapical; all coxae black, legs further yellow. All femora lacking distinct ventral bristles. Fore tibia with a short anterodorsal only. 5 dc (4 almost equally long, anterior most small). Genital capsule brown, cerci yellow.

Male. (Fig. 44) Body length 3.0– 3.5 mm; wing length 2.78–3.02 mm.

Head. Frons and face with shining dark metallic green ground colour. Face below middle, as wide as depth of third antennal segment. Epistoma a little concave above middle, with a deep concavity above clypeus. Clypeus protruding, about 1/3 length of epistoma, below broader than long. Palpus yellow with black bristly hairs. Rostrum large (a third of height of eye) dark brown with white hairs. Postcranium shining dark metallic green. 2 long, diverging ocellars; 2 long (only slightly) shorter, converging verticals, pointing forward; 2 small postocellars (not minute like in species 1); 2 distinct postverticals, longer than upper postoculars. All postoculars black and uniseriate, longer below and there with a few additional black long hairs behind them.

Antenna yellow, with extreme tip of third segment brown. Lateral margin of second segment black; with long dorsal and ventral bristles. Third segment higher than long, apically