Ngirhaphium sivasothii Grootaert & Puniamoorthy 2014, new species
Creators: name: Grootaert, Patrick
name: Puniamoorthy, Jayanthi
Publisher: name: Zenodo
Year: 2014
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Diptera
Dolichopodidae
Ngirhaphium
Ngirhaphium sivasothii

description: Ngirhaphium sivasothii, new species
(Figs. 6–8, 9, 10, 17)
Material examined. Holotype male, Singapore, Semakau Island (type locality), SMN3, Malaise trap in mangrove, 27 September 2012 (reg. 29483, coll. J. Puniamoorthy & P. Grootaert; Ma 1306 in coll. ZRC). Paratypes: Singapore: Pulau Ubin: 2 females, PU2, 20 April 2012, (reg. 29189, Ma0616); 1 male, PU2, 20 May 2012, (reg. 29242, Ma0648); 1 female, PU2, 16 June 2012, (reg. 29294, Ma1660); 1 female, PU2, 23 June 2012, (reg. 29307, Ma1682); 1 female, PU2, 30 June 2012, (reg. 29320, Ma1701); 1 male, 1 female, PU2, 14 July 2012, (reg. 29346, Ma1749); 1 female, PU2, 21 July 2012, (reg. 29359, Ma1759); 2 females, PU2, 28 July 2012, (reg.29372, Ma1770); 1 female, PU2, 18 August 2012, (reg. 29411, Ma1881); 1 female, PU2, 25 August 2012, (reg. 29424, Ma1892); 1 male, PU2, 1 September 2012, (reg. 29437, Ma1782); 1 female, PU2, 22 September 2012, (reg. 29476, Ma1794); 1 male, PU2, 13 October 2012, (reg. 29515, Ma3179); 2 females, PU2, 23 February 2013, (reg. 29762, Ma3265); 2 females, PU2, 23 February 2013, (reg. 29762, Ma3864); 1 female, PU3, 7 April 2012, (reg. 29165, Ma1931); 1 male, 1 female, PU3, 21 July 2012, (reg. 29360, Ma1849); 1 female, PU4, 16 March 2013, (reg. 29805, Ma3872); Semakau: 1 male, SMN1, 3 April 2012, (reg. 29159, Ma0095); 3 males, 3 females, SMN1, 12 April 2012, (reg. 29166, Ma0262); 3 males, 1 female, SMN1, 19 April 2012, (reg. 29183, Ma0318); 1 male, SMN1, 26 April 2012, (reg. 29196, Ma0294); 5 females, SMN1, 3 May 2012, (reg. 29209, Ma0279); 2 males, 1 female, SMN1, 3 May 2012, (reg. 29222, Ma0288); 1 male, SMN1, 17 May 2012, (reg. 29235, Ma0299); 2 males, SMN1, 24 May 2012, (reg. 29248, Ma0304); 1 female, SMN1, 5 July 2012, (reg. 29326, Ma1082); 2 males, SMN1, 19 July 2012, (reg. 29352, Ma1091); 1 female, SMN1, 10August 2012, (reg. 29391, Ma1242); 1 male, 1 female, SMN1, 6 September 2012, (reg. 29443, Ma1401); 1 female, SMN1, 13 September 2012, (reg. 29456, Ma1410); 1 male, 2 females, SMN1, 27 September 2012, (reg. 29482, Ma1415); 2 males, 2 females, SMN1, 18 October 2012, (reg. 29521, Ma2099); 4 males, 8 females, SMN1, 25 October 2012, (reg. 29534, Ma2123); 3 males, 3 females, SMN1, 1 November 2012, (reg. 29547, Ma2271); 4 males, 3 females, SMN1, 8 November 2012, (reg. 29560, Ma2264); 6 males, 11 female, SMN1, 15 November 2012, (reg. 29573, Ma2277); 3 males, 3 females, SMN1, 29 November 2012, (reg. 29599, Ma2257); 2 males, 7 females, SMN1, 6 December 2012, (reg. 29612, Ma2290); 5 males, 3 females, SMN1, 13 December 2012, (reg. 29625, Ma2286); 6 males, 9 females, SMN1, 27 December 2012, (reg. 29651, Ma2289); 8 males, 24 females, SMN1, 10 January 2013, (reg. 29677, Ma2303); 3 males, 4 females, SMN1, 17 January 2013, (reg. 29690, Ma2301); 12 males, 17 females, SMN1, 24 January 2013, (reg. 29703, Ma3273); 13 males, 19 females, SMN1, 7 February 2013, (reg. 29729, Ma3277); 1 male, SMN1, 7 February 2013, (reg. 29729, Ma3913); 4 males, 8 females, SMN1, 14 February 2013, (reg. 29742, Ma3286); 14 males, 19 females, SMN1, 21 February 2013, (reg. 29755, Ma3247); 22 males, 13 females, SMN1, 28 February 2013, (reg. 29768, Ma3210); 4 males, 16 females, SMN1, 7 March 2013, (reg. 29782, Ma3414); 8 males, 12 females, SMN1, 14 March 2013, (reg. 29796, Ma3289); 1 female, SMN1, 14 March 2013, (reg. 29796, Ma3433); 11 male, 9 females, SMN1, 21 March 2013, (reg. 29810, Ma3878); 12 males, 18 females, SMN1, 28 March 2013, (reg. 29824, Ma3298); 3 females, SMN2, 12 April 2012, (reg. 29167, Ma0325); 1 male, 2 females, SMN2, 19 April 2012, (reg. 29184, Ma0336); 2 females, SMN2, 03 May.2012, (reg. 29210, Ma0357); 2 females, SMN2, 10 May 2012, (reg. 29223, Ma0369); 2 females, SMN2, 30 May 2012, (reg. 29262, Ma0392); 1 male, 1 female, SMN2, 7 June 2012, (reg. 29275, Ma1021); 1 male, SMN2, 14 June 2012, (reg. 29288, Ma1033); 1 female, SMN2, 5 July 2012, (reg. 29327, Ma1103); SMN2, 16August 2012, (reg. 29405, Ma1259); 1 male, 3 females, SMN2, 23 August 2012, (reg. 29418, Ma1268); 2 males, 2 females, SMN2, 30 August 2012, (reg. 29431, Ma1279); 2 males, 2 females, SMN2, 6 September 2012, (reg. 29444, Ma1420); 2 males, 3 females, SMN2, 13 September 2012, (reg. 29457, Ma1293); 3 males, 3 females, SMN2, 20 September 2012, (reg. 29470, Ma1319); 3 males, 3 females, SMN2, 27 September 2012, (reg. 29489, Ma1306); 4 males, 4 females, SMN2, 4 October 2012, (reg. 29496, Ma2628); 1 male, 1 female, SMN2, 18 October 2012, (reg. 29522, Ma2641); 1 male, SMN2, 25 October 2012, (reg. 29535, Ma2649); 1 male, SMN2, 15 November 2012, (reg. 29574, Ma2249); 2 females, SMN2, 22 November 2012, (reg. 29587, Ma2267); 1 male, SMN2, 29 November 2012, (reg. 29600, Ma2260); 3 males, SMN2, 3 January 2013, (reg. 29665, Ma2299); 6 males, 2 females, SMN2, 10 January 2013, (reg. 29678, Ma2297); 1 male, SMN2, 14 February 2013, (reg. 29743, Ma3480); 1 male, 3 females, SMN2, 21 February 2013, (reg. 29756, Ma3254); 1 male, 1 female, SMN2, 28 February 2013, (reg. 29769, Ma3215); 1 male, 2 females, SMN2, 28 March 2013, (reg. 29825, Ma3509); 1 male, SMN3, 12 April 2012, (reg. 29168, Ma0180); 3 males, 1 female, SMN3, 19 April 2012, (reg. 29185, Ma0126); 1 male, 5 females, SMN3, 26 April 2012, (reg. 29198, Ma0159); 2 males, 1 female, SMN3, 3 May 2012, (reg. 29211, Ma0103); 1 male, 4 females, SMN3, 10 May 2012, (reg. 29224, Ma0143); 1 male, 4 females, SMN3, 17 May 2012, (reg. 29237, Ma0201); 2 males, SMN3, 24 May 2012, (reg. 29250, Ma0218); 1 male, 1 female, SMN3, 31 May 2012, (reg. 29263, Ma0238); 4 females, SMN3, 7 June 2012, (reg. 29276, Ma0252); 2 females, SMN3, 14 June 2012, (reg. 29289, Ma1054); 1 male, 1 female, SMN3, 21 June 2012, (reg. 29302, Ma1066); 1 female, SMN3, 28 June 2012, (reg. 29315, Ma1074); 1 male, SMN3, 5 July 2012, (reg. 29328, Ma1110); 1 male, 1 female, SMN3, 12 July 2012, (reg. 29341, Ma1115); 1 male, 2 females, SMN3, 26 July 2012, (reg. 29367, Ma1128); 1 female, SMN3, 2 August 2012, (reg. 29380, Ma1328); 2 males, 1 female, SMN3, 10 August 2012, (reg. 29393, Ma1332); 1 female, SMN3, 16 August 2012, (reg. 29406, Ma1338); 1 female, SMN3, 23 August 2012, (reg. 29419, Ma1343); 1 male, 1 female, SMN3, 13 September 2012, (reg. 29458, Ma1361); 2 males, 1 female, SMN3, 20 September 2012, (reg. 29971, Ma1374); 2 males, 2 females, SMN3, 27 September 2012, (reg.29484, Ma1386); 1 male, SMN3, 4 October 2012, (reg. 29497, Ma2693); 4 females, SMN3, 18 October 2012, (reg. 29523, Ma2709); 2 females, SMN3, 8 November 2012, (reg. 29562, Ma2268); 1 male, SMN3, 15 November 2012, (reg. 29575, Ma2251); 4 females, SMN3, 22 November 2012, (reg. 29588, Ma2274); 2 females, SMN3, 29 November 2012, (reg. 29601, Ma2263); 2 females, SMN3, 6 December 2012, (reg. 29614, Ma2293); 3 females, SMN3, 13 December 2012, (reg. 29627, Ma2295); 2 males, 4 females, SMN3, 20 December 2012, (reg. 29640, Ma2294); 2 females, SMN3, 27 December 2012, (reg. 29653, Ma2296); 2 males, 3 females, SMN3, 3 January 2013, (reg. 29666, Ma2298); 4 males, 5 females, SMN3, 10 January 2013, (reg. 29679, Ma2310); 3 males, 8 females, SMN3, 17 January 2013, (reg. 29692, Ma2312); 6 males, 3 females, SMN3, 24 January 2013, (reg. 29705, Ma2308); 1 female, SMN3, 31 January 2013, (reg. 29721, Ma2314); 1 male, 1 female, SMN3, 31 January 2013, (reg. 29718, Ma2400); 3 males, 6 females, SMN3, 7 February 2013, (reg. 29731, Ma3532); 5 males, 7 females, SMN3, 14 February 2013, (reg. 29744, Ma3544); 3 males, 5 females, SMN3, 21 February 2013, (reg. 29752, Ma2309); 4 males, 7 females, SMN3, 28 February 2013, (reg. 29770, Ma3218); 4 males, 7 females, SMN3, 28 February 2013, (reg. 29770, Ma3546); 2 males, 4 females, SMN3, 7 March 2013, (reg. 29784, Ma3557); 5 males, 6 females, SMN3, 14 March 2013, (reg. 29798, Ma3574); 3 males, 6 females, SMN3, 21 March 2013, (reg. 29812, Ma3586); 1 male, 1 female, SMN3, 28 March 2013, (reg. 29826, Ma3596); 4 males, 2 females, SMO1, 3 April 2012, (reg. 29161, Ma0017); 5 males, 4 females, SMO1, 12 April 2012, (reg. 29169, Ma0403); 1 male, 1 female, SMO1, 12 April 2012, (reg. 29199, Ma0412); 3 males, 3 females, SMO1, 19 April 2012, (reg. 29186, Ma0420); 2 males, 1 female, SMO1, 3 May 2012, (reg. 29212, Ma0421); 1 female, SMO1, 10 May 2012, (reg. 29225, Ma0427); 2 males, SMO1, 24 May 2012, (reg. 29251, Ma0429); 3 males, SMO1, 31 May 2012, (reg. 29264, Ma0432); 1 male, 1 female, SMO1, 7 June 2012, (reg. 29277, Ma1131); 1 male, 1 female, SMO1, 14 June 2012, (reg. 29290, Ma1133); 2 females, SMO1, 21 June 2012, (reg. 29303, Ma1135); 8 males, 4 females, SMO1, 12 July 2012, (reg. 29342, Ma1139); 8 males, 4 females, SMO1, 19 July 2012, (reg. 29355, Ma1148); 8 males, 7 females, SMO1, 26 July 2012, (reg. 29358, Ma1157); 6 males, 1 female, SMO1, 2 August 2012, (reg. 29381, Ma1204); 12 males, 4 females, SMO1, 10 August 2012, (reg. 29394, Ma1215); 14 females, SMO1, 16 August 2012, (reg. 29407, Ma1217); 5 males, 5 females, SMO1, 23 August 2012, (reg. 29420, Ma1223); 6 males, 4 females, SMO1, 30 August 2012, (reg. 29433, Ma1227); 1 male, 1 female, SMO1, 6 September 2012, (reg. 29446, Ma1439); 8 males, 5 females, SMO1, 13 September 2012, (reg. 29459, Ma1446); 5 males, 2 females, SMO1, 20 September 2012, (reg. 29472, Ma1450); 8 males, 2 females, SMO1, 27 September 2012, (reg. 29485, Ma1456); 2 males, 3 females, SMO1, 4 October 2012, (reg. 29498, Ma2804); 8 males, 5 females, SMO1, 11 October 2012, (reg. 29511, Ma2792); 2 males, SMO1, 18 October 2012, (reg. 29524, Ma2820); 3 males, 1 female, SMO1, 25 October 2012, (reg. 29537, Ma2801); 1 female, SMO1, 1 November 2012, (reg. 29550, Ma2757); 2 males, 1 female, SMO1, 8 November 2012, (reg. 29563, Ma2248); 1 male, SMO1, 15 November 2012, (reg. 29576, Ma2266); 1 male, SMO1, 22 November 2012, (reg. 29589, Ma2270); 2 males, SMO1, 29 November 2012, (reg. 29602, Ma2261); 5 females, SMO1, 6 December 2012, (reg. 29615, Ma2284); 1 male, 1 female, SMO1, 13 December 2012, (reg. 29628, Ma2285); 1 female, SMO1, 10 January 2013, (reg. 29680, Ma2305); 1 female, SMO1, 14 February 2013, (reg. 29745, Ma3608); 1 male, SMO1, 7 March 2013, (reg. 29785, Ma3609); 11 male, 16 females, SMO1, 14 March 2013, (reg. 29799, Ma3610); 3 males, 4 females, SMO1, 21 March 2013, (reg. 29813, Ma3624); 3 males, 2 females, SMO1, 28 March 2013, (reg. 29827, Ma3635); 1 female, SMO2, 2 August 2012, (reg. 29382, Ma1232); 1 female, SMO2, 20 December 2012, (reg. 29642, Ma2283); 1 male, SMO3, 3 May 2012, (reg. 29214, Ma0470); 3 males, 2 females, SMO3, 27 September 2012, (reg. 29487, Ma1459); 7 males, 15 females, SMO3, 4 October 2012, (reg. 29500, Ma2826); 4 males, 6 females, SMO3, 11 October 2012, (reg. 29513, Ma2842); 2 males, 13 females, SMO3, 18 October 2012, (reg. 29526, Ma2853); 3 males, 5 females, SMO3, 25 October 2012, (reg. 29539, Ma2864); 3 males, 7 females, SMO3, 1 November 2012, (reg. 29552, Ma2259); 4 females, SMO3, 8 November 2012, (reg. 29565, Ma2252); 5 males, 12 females, SMO3, 15 November 2012, (reg. 29578, Ma2278); 1 male, 1 female, SMO3, 22 November 2012, (reg. 29591, Ma2255); 2 males, 4 females, SMO3, 29 November 2012, (reg. 29604, Ma2276); 1 male, 2 females, SMO3, 6 December 2012, (reg. 29617, Ma2281); 1 male, SMO3, 13 December 2012, (reg. 29630, Ma2282); 1 male, 1 female, SMO3, 20 December 2012, (reg. 29643, Ma2279); 1 male, 3 females, SMO3, 27 December 2012, (reg. 29656, Ma2280); 1 male, SMO3, 10 January 2013, (reg. 29682, Ma2306); 1 female, SMO3, 17 January 2013, (reg. 29695, Ma2307); 1 male, 5 females, SMO3, 24 January 2013, (reg. 29708, Ma2423); 3 males, 4 females, SMO3, 7 March 2013, (reg. 29787, Ma3658); 1 female, SMO3, 14 March 2013, (reg. 29801, Ma3678); 2 males, 1 female, SMO3, 21 March 2013, (reg. 29815, Ma3696); 2 females, SMO3, 28 March 2013, (reg. 29829, Ma3718); Sungei Buloh: 1 female, SB1, 4 April 2012, (reg. 29155, Ma0775); 1 female, SB1, 1 August 2012, (reg. 29374, Ma1925); 1 female, SB1, 24 October 2012, (reg. 29530, Ma2445); 1 male, 1 female, SB1, 13 March 2013, (reg. 29792, Ma3755); 1 male, SB1, 27 March 2013, (reg. 29820, Ma3806); 1 female, SB2, 12 September 2012, (reg. 29453, Ma1922).
Other records (non-MIP). Sungei Buloh: 2 females, 11 May 2005, (reg. 25160, Si861; coll. P.G.); 1 female, 18 May 2005, (reg. 25161, Si1222; coll. P.G.); 1 female, 28 October 2005, (reg. 25406, Si1218; coll. P.G.); 1 female, 9 November 2005, (reg. 25418, Si1170; coll. P.G.); 1 male, 23 December 2005, (reg. 25471, Si1561; coll. P.G.); Pulau Ubin, Chek Jawa: 1 male, 11 October 2005, (reg. 25380, Si1087; coll. P.G.); 1 male, 26 October 2005, (reg. 25399, Si1130; coll. P.G.); 1 male, 30 December 2005, (reg. 25475, Si1442; coll. P.G.).
Diagnosis. A medium-sized species generally with dark infuscate wing with longitudinal veins and Tp brownish seamed. Mesonotum and tergites shining metallic green. Apical aristal segment shorter, but nearly as long as basal segment. Male with dorsal surstylus half as long as cerci, with a rectangular bent.
Etymology. The species is dedicated to N. Sivasothi from the National University of Singapore, our friendly and dedicated colleague specialised in mangroves and otters.
Description. Male: Body length: 5.7 mm; wing length: 5.5 mm.
Head: Frons shining metallic green (not dusted), sunken between the eyes, wide in front becoming wider behind; ocellar callus small, raised above frons. Face wide, as wide as front of frons, parallel-sided, silvery dusted with a very narrow clypeus (hardly a tenth of length of face). Eyes pass beyond the border of the face; eyes densely set with silvery hairs. Two very long ocellars, directed backward and diverging. Vertical bristles long, half as long as ocellars, rather anteriad on frons at level of ocellar callus, but close to eye border, long, black, directed forward and tips crossing. A pair of long black postverticals directed backward and crossing. Postoculars strong black in a single row; postcranium greenish in ground-colour but grey dusted, below with long fine yellowish white hairs. Palpus long strap-shaped, yellowish with few short black hairs, no bristles. Rostrum in male very small in comparison to the huge rostrum in female; labella brown with long black hairs.
Antenna: Antenna very long, completely black. First segment long, 3 times as long as second segment; second segment short, apically with a crown of short black bristles. Third segment very long strap-shaped, laterally flattened, about 6 times as long as width at base. Arista apical, apical segment a little shorter than basal segment, thickened and gradually tapering towards tip. Ratio scape, pedicel, postpedicel, basal aristal segment, apical aristal segment (mm): 0.36: 0.11: 0.91: 0.35: 0.32.
Thorax: Thorax and scutellum with a shining dark metallic green ground-colour, covered with a fine grey dusting. A black stripe outside each acr-row. All hairs and bristles black. Pleura more densely grey dusted than mesonotum.Acr biseriate, about 7 pairs, the rows widening a little behind. Presutural dc multiseriate; 6 post-sutural dc: 4 short and 2 long prescutellars. A pair of strong scutellars.A long humeral with a shorter bristle in front; a very strong posthumeral, 2 strong notopleurals, 1 postsutural, 1 supraalar, 1 very strong postalar. All propleural bristles black, 4 short upper and 2 longer black lower propleural bristles (lower one twice as long as upper).
Legs (Fig. 6): Yellow, all bristles black. All coxae greenish black in ground-colour, covered with a fine greyish dusting. All trochanters pale brown. Tip of mid and hind tibiae darkened at tip. All tarsi brownish yellow, becoming darker towards tip. Terminal segments completely black.
Fore leg: Shorter than mid and hind leg. Coxa with short black bristles. Fore femur a little swollen in basal half; a row of fine pv in apical half; a row of short ventral bristles, distinct only in apical half. A short preapical posterior pointing downward and a stronger anterior preapical pointing forward. Fore tibia with 4 strong ad, 4 strong pd and a crown of 4 apicals. All tarsal segments densely set with black hairs and short black bristles. Fourth tarsal segment with a dorsal, asymmetrical forked protrusion, extending over the terminal tarsomere; outer branch of fork shorter than inner one, tips truncated. Terminal segment with a pair of long normal claws and a thicker claw-like structure beneath the posterior claw. 2 well developed pulvilli and an empodium. Length of tibia and tarsal segments (mm): 1.56: 1.2: 0.36: 0.31: 0.15: 0.13.
Mid leg: Coxa with short bristles anteriorly; no exterior bristle. Mid femur as wide as fore femur; ventrally with inconspicuous bristles; a strong anterior preapical and 2 tiny posterior preapicals. Tibia with a 5 ad, 6 pd (might be considered as dorsal) and 5 longer av and a crown of long apicals. Tarsal segments 1-4 ventrally at tip with a pair short spinules as well as a comb of shorter black bristles. Length of tibia and tarsal segments (mm): 2.6: 1.69: 0.78: 0.52: 0.21: 0.1.
Hind leg: Coxa bare. Hind femur stronger than mid femur, as wide as fore femur; ventrally almost bare; a strong anterior preapical, no posterior preapical. Tibia stronger bristled than mid tibia with 6 long av, 7 ad, 7 pd and crown of long apicals. Segments 1–4 ventrally at tip with a pair of short spinules as well as a comb of black bristles. Length of tibia and tarsal segments (mm): 3.51: 1.45: 0.83: 0.65: 0.4: 0.34.
Wing: hyaline, faintly tinged brownish, but anteriorly between costa and R 4+5 with a yellowish to brownish tinge. Membrane along veins R 4+5, M 1+2, M 3+4 and Tp sometimes brown to black seamed. Veins dark brown. M 1+2 sharply bent upwards and ending in costa closely near tip of R 4+5. Tp straight, about as long as apical part of M 3+4. Anal vein well developed. Halter with white knob. Squama white with long white cilia.
Abdomen: Shining dark metallic green; tips and sides of tergites with a greyish dusting. Sternites greyish dusted. Tergites densely set with quite long, black bristles; hindmarginal bristles a little longer than the other bristles. Only tergite 5 with very long marginal bristles. Sternites with very short hairs except for the longer marginals on sternite 4. Hypopygium sessile with tip of cerci hidden in sternite 4 (note that on Fig. 6 the hypopygium is removed from the sessile position). Cerci much longer than dorsal surstylus. Both cerci fused before apex. Tip of cercus (Fig. 10) much dilated, bordered with long yellow bristles. Tip of dorsal surstylus much enlarged, transverse on cercus, darkened, its border set with long yellowish bristles, longest on dorsal half. Ventral and dorsal surstylus not fused. Hypandrium dorsally with a narrow hook-shaped black protuberance.
Female: Body length: 4.5–5.1 mm; wing length: 5.7–6.4 mm.
Antennae: Antennae as long as in male. Ratio of first, second, third segment and basal and apical aristal segments (in mm): 0.42: 0.14: 0.84: 0.32: 0.35. Clypeus very large, nearly as long as upper part of face, protruding over rostrum; tip pointed. Rostrum large: in lateral view about half as long as an eye. Palpus long, strap-shaped, brownish at base, yellowish at tip.
Legs: Shape and bristling of legs similar to that of male except otherwise mentioned.
Fore leg: Fourth tarsomere as usual, without protuberance like in male. Terminal tarsal segment with a dorsal apical protuberance and with the usual claws and pulvilli. Ratio of tibia and tarsal segments in mm: 1.82: 1.3: 0.52: 0.52: 0.41: 0.26.
Mid leg: Ratio of tibia and tarsal segments (mm): 3.12: 1.6: 0.7: 0.52: 0.34: 0.39.
Hind leg: Ratio of tibia and tarsal segments (mm): 4.2: 1.6: 0.9: 0.67: 0.39: 0.34.
Abdomen. Tergites 1–5 and sternites 1–5 sclerotised, shining metallic green. Tergites 6–8 membranous (pale greyish) except for basal border. Sternites 6, 7 weakly sclerotised, brownish. Sternite 8 not sclerotised covered with thorn-like hairs. Segment 9 with a complex sclerotisation, densely pale haired. No acanthae present.
description: Published as part of Grootaert, Patrick & Puniamoorthy, Jayanthi, 2014, Revision of Ngirhaphium (Insecta: Diptera: Dolichopodidae), with the description of two new species from Singapore's mangroves, pp. 146-160 in Raffles Bulletin of Zoology 62 on pages 150-154, DOI: 10.5281/zenodo.4502148