Chelipoda inthawichayanona, Plant, 2009

Plant, Adrian R., 2009, Diversity Of Chelipoda Macquart, 1823 (Diptera: Empididae: Hemerodromiinae) In Northern Thailand With Discussion Of A Biodiversity ‘ Hot Spot’ At Doi Inthanon, Raffles Bulletin of Zoology 57 (2), pp. 255-277 : 262

Chelipoda inthawichayanona , new species

( Fig. 4 )

Material examined. – Holotype. Male, THAILAND: Chiang Mai, Doi Inthanon National Park, Summit Forest , 18°35.361'N 98°29.157'E, 2,500 m, Malaise trap, coll. Y. Areeluck, 16–24 Aug.2006 ( QSBG, T185 ).

Paratypes. Same data as holotype , 1 male, 2 females ( QSBG & NMWC, T185 ) ; 2 males, 2 females, 9–16 Aug.2006 ( NMWC, T178 ) ; 1 male, 3 females, 24–30 Aug.2006 ( QSBG, T235 ) ; 1 male, 13–21 Sep.2006 ( QSBG, T253 ) ; 1 male, 1 female, 21–27 Sep.2006 ( QSBG, T346 ) : Summit Marsh, 18°35.361'N 98°29.157'E, 2,500 m, 2 males, 2–9 Aug.2006 ( QSBG, T124 ) ; 1 female, 9–16 Aug.2006 ( QSBG, T177 ) ; 2 males, 16–24 Aug.2006 ( NMWC, T184 ) ; 1 male, 13–21 Sep.2006 ( NMWC, T252 ) ; 3 females, 5–12 Oct.2006 ( NMWC, T362 ) .

Diagnosis. – Head and thorax black, propleuron contrastingly yellowish. C 1 with distinct anterobasal spine. Posterior dc (in line with npl) minute. Male cercus with distinct pointed process ( Fig. 4 ).

Description. – Male. Body length 2.0– 2.5 mm. Head blackish brown; strongly dusted; larger setae black; vt, ocl and upper upo equally strong; other upo smaller; lpo small, multiserial, pale. Antenna dark brown, stylus white; poped 3× long as wide, stylus 2× as long. Palpi yellowish brown.

Thorax blackish; strongly dusted especially on scutum. Propleuron contrastingly yellowish with supraalar area and scutum posteriorly often rather yellowish brown or yellowish black. Thoracic setae black including one npl, one sa and pair of sct all strong; anterior dc strong, posterior dc (in line with npl) minute; small anterior postpronotal and posterior postpronotal setae usually present.

Legs yellow, tarsomeres 3 apically and 4–5 darker; F 2, F 3 and sometimes T 2 and T 3 obscurely infuscated. C 1 as long as thorax, 1–2 distinct short anterobasal setae clearly much stronger than anterior ciliation of minute setulae. F 1 1.2× as long as C 1, moderately inflated, 4.8× as long as wide, widest 0.3–0.4 from base; femoral formula 5(5–5)/20(17– 22)/13.5(11–16)/4(4–4) +1 ( Table 1), spines dark but basal spine sometimes yellowish, denticles black. T 1 0.65–0.7× as long as F 1.

Abdomen dark brown; genitalia with fused Hypan + Epan ( Fig. 4 ) black, rather yellowish black above, slightly produced and bluntly pointed posteroapically, bearing only short dark setae; posterior mid line rather less strongly sclerotized. Cercus largely black with strong pointed ad process and much shorter, blunter av process; strong setae dorsally and on inner lower surface. Subepandrial process black, narrow, anteriorly directed, upturned distally. Phallus narrow, yellowish, sharply reflexed anteriorly.

Wing membrane faintly brownish; veins brownish, becoming yellowish at extreme base. Squamae with dark fringes. Halter grey.

Female. Similar to male but antenna with poped shorter and broader than in male, 2.5× long as wide

Legs similar to male but sometimes rather darker; F 1 slightly broader, 4.1× as long as wide, femoral formula 5(4– 5)/20(18–25)/15(13–17)/4(4–4) +1–2. Cercus elongate.

Etymology. – The specific epithet commemorates King Inthawichayanon, one of the last Lanna kings who was concerned for forest conservation and whose remains were placed on Doi Inthanon, the type locality of this species.

Remarks. – This species is confined to moist hill evergreen forest on the summit of Doi Inthanon at 2,500 m. Adults were captured from August to October at the end of the wet season.

Figures

Figs. 1–6. Male genitalia of Chelipoda species in lateral view: 1. C. chaiamnata new species; 2. C. flavida Brunetti; 3. C. guangxiensis Yang & Yang; 4. C. inthawichayanona new species: 5–6 C. hubeiensis Yang & Yang; 5. typical form; 6. variant (outline only).