Thinophilus spinatus Samoh & Satasook & Grootaert 2017, sp. nov.
Creators: name: Samoh, Abdulloh
name: Satasook, Chutamas
name: Grootaert, Patrick
Publisher: name: Zenodo
Year: 2017
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Diptera
Dolichopodidae
Thinophilus
Thinophilus spinatus

description: Thinophilus spinatus sp. nov.
urn:lsid:zoobank.org:act: 14EBE5D8-334A-4838-9510-8EBB664BC0BD
Figs 30–35
Diagnosis
A medium-sized, slender-legged species with yellow legs, but fore coxa black except for apical third. The femora are spindle-shaped and the fore femur in male as well as in female bear long, brown spinelike bristles.
Etymology
The specific epithet refers to the ventral bristles on the fore femur that are present in both male and female.
Type material
Holotype
THAILAND: ♂, Phang Nga Province, Muang, Bang Phat, 8°21 ′ 48.8 ″ N, 98°34 ′ 38.8 ″ E, Malaise trap, 13 Feb. 2015, A. Samoh leg. (NHM-PSU).
Paratypes
THAILAND: 1 ♂, 1 ♀, same collection data as for holotype.
Additional material
SINGAPORE: 1 ♀, Sarimbun (SR3), mangrove, 21 May 2014, J (leg. J. Puniamoorthy; Lee Kong Chian Natural History Museum, Singapore).
Description
Male (Fig. 30)
LENGTH. Body 4.3 mm; wing 3.75 mm.
HEAD. Frons and face with shiny dark metallic green ground colour. Face half as wide as length of postpedicel. Clypeus about one third of epistoma, hardly protruding. A pair of long divergent black ocellars. No postocellars. A pair of tiny proclinate verticals at level of front ocellars. Postcranium dark metallic green. Postverticals not differentiated from upper postoculars. Upper and lower postoculars uniseriate, short, black, with a few white bristles behind mouth. Antenna pale brownish. Arista dorsal, 2.5–3 times as long as antenna, brown, not pubescent. Basal article short, brown; rest of arista paler. Palpus yellow, with few black bristly hairs. Proboscis dark brown.
THORAX. Thorax and scutellum shiny dark metallic green, with coppery and purple reflections. No dull black spots. Bristles on thorax black. Acr lacking; 7 rather short dc, gradually growing longer toward scutellum, ending in a very long prescutellar. Scutellum with 2 long marginals with a tiny hair at outside. Two short black propleural bristles.
LEGS. Yellow but sometimes pale brownish; apical tarsomere 2 of all legs brownish. Fore coxa black, but apical third yellowish brown; mid and hind coxae entirely black. Coxa anteriorly with a short bristle near base and a long bristle at apical third. Fore femur club shaped, thickened in basal half, apical half thin. Ventrally with 4 long black bristles; longest bristle twice as long as femur is wide. Fore tibia about as long as femur, without ventral bristling; tarsomere 1 much longer than following tarsomeres together. Mid coxa with a tiny black exterior bristle near middle; anterior bristles very short, black. Mid femur ventrally without bristles; no preapical av. Mid tibia as long as mid femur; with a crown of short apical bristles; 2 distinct ad. Mid tarsomere 1 twice as long as following tarsomeres together. Hind coxa with a very short black exterior bristle. Hind femur without ventral bristles; no preapical anterodorsal bristles. Hind tibia with 2 very short ad and a crown of apical bristles. Hind tarsomere 1 as long as tarsomere 2.
WINGS. Uniformly brownish tinged, without spots. Tp straight, apical part of M 3+4 almost twice as long as Tp. Anal vein not reaching wing margin.
ABDOMEN. Shining dark metallic green. Hairs and hind-marginal bristles on tergites short, black. Sternites without bristles, except sternite 4 with a tuft of short black bristles in apical half.
TERMINALIA (Figs 32–35). Phallus long, strap-shaped (Fig. 34 phallus folded). Cerci pale brownish with pale hairs, dorsally fused (Fig. 33).
Female (Fig. 31)
LENGTH. Body 3.5 mm long, wing 3.1 mm long.
BODY. Similar to male except for following characters: clypeus ⅓ length of face, bulging; fore femur with 5 strong black ventral bristles up to 3 times as long as femur is wide.
Distribution
Southern Thailand (Andaman Sea) and Singapore.
Remarks
The femora are spindle-shaped and the fore femur in male as well as in female bears long, brown stiff bristles as in T. spinatoides sp. nov. The main difference is that the fore femur in males of T. spinatoides sp. nov. is much more inflated than in T. spinatus sp. nov. For further differences, see under Remarks in T. spinatoides sp. nov.
description: Published as part of Samoh, Abdulloh, Satasook, Chutamas & Grootaert, Patrick, 2017, Eight new species of marine dolichopodid flies of Thinophilus Wahlberg, 1844 (Diptera: Dolichopodidae) from peninsular Thailand, pp. 1-40 in European Journal of Taxonomy 329 on pages 27-29, DOI: 10.5852/ejt.2017.329, http://zenodo.org/record/3829427