Anaclastoctedon sano, Plant, 2010

Plant, Adrian R., 2010, Anaclastoctedon (Diptera: Empididae: Hemerodromiinae), A New Genus From Asia And Australia, Raffles Bulletin of Zoology 58 (1), pp. 15-25 : 22

Anaclastoctedon sano , new species

( Fig. 10 )

Material examined. – Holotype. Male , NEPAL: between Ghopte and Thari Pati [Thare Pati], [approx. 28°01'N 85°29'E], 3,200 m, 26 Apr.1985, coll. A. Smetana ( CNC).

Paratypes. – Four males, 1 female, same data as holotype ; 1 male Nuwakot Dis., betw. Ghopte and Thare Pati 3,200 m, 23–26 Apr. [19]85, coll, A. Smetana ; 1 male, Bagmati bel. Thare Pati, 3,300 m, 13 Apr. [19]81, coll. Löbl & Smetana (all in CNC) .

Diagnosis. – Species with dirty yellowish thorax, appearing darker in some lights but lacking obvious dark stripes on the scutum and with distinctive male genitalia.

Description. – Male. Length 2.0mm. Head moderately dorsoventrally compressed, black, dusted yellowish grey, face whitish grey. Setae black with yellowish reflections; ocellars conspicuously long, fine; lower postoculars 3–4 serial, fine. Proboscis brownish yellow, palpus yellow with darker apical seta. Antenna yellow with dark stylus 3× as long as postpedicel which is obscurely darkened, sometimes appearing blackish.

Thorax ground colour rather variable, usually dirty yellowish, paler on pleura, heavily dusted greyish, appearing almost black in certain light. Setae yellowish black; dorsocentrals, postpronotal, upper notopleural, supraalar and scutellars strong; lower notopleural developed, 0.3× long as upper.

Legs rather pale yellow, apical tarsomeres hardly darker. F 1 stout, about 5 av and 5 pv strong yellow setae between which are rows of about 13–15 av and 11–12 pv black denticles; dorsal fringe of setae distinct.

Abdomen yellowish brown, tergite 5 with fan of fine longish setae. Genitalia ( Fig. 10 ) brown; epandrium smaller than hypandrium, subquadrate with long setae posteriorly. Cercus with major lobe petiolate basally, broad and bifed distally with stout spines posteroapically and fine setulae anteroapically; basal lobe greatly reduced, inconspicuous. Parameral sheath broadly pointed apically.

Wing membrane distinctly yellowish, veins yellow, basal coastal seta strong. Halter pale yellowish white.

Female. Similar to male but abdomen paler yellowish.

Etymology. – The specific epithet sano (Nepalese) means small and refers to the small size of this species.

Remarks – This species is known only from a single locality in the Nepalese Himalaya at 3,200 -3,300 m during April. The habitat at the type locality is apparently conifer forest merging into alpine scrub (I. Juettner, pers. com.).

Figures

Figs. 9–12. Anaclastoctedon new genus: 9. A. ancistrodes new species, male terminalia; 10. A. sano new species, male terminalia; 11–12. A. prionton new species; 11. male terminalia; 12. apex of parameral sheath, dorsal aspect.