Eight new species of marine dolichopodid flies of Thinophilus Wahlberg, 1844 (Diptera: Dolichopodidae) from peninsular Thailand Author Samoh, Abdulloh A18861BF-9717-4661-94AD-2599CEE6E9B7 Entomology Research Unit, Department of Biology, Faculty of Science, Prince of Songkla University (PSU), Kho Hong, Hat Yai, Songkhla, Thailand, 90110. & Princess Maha Chakri Sirindhon Natural History Museum of the Prince of Songkla University (NHM-PSU), Hat Yai, Songkhla, Thailand, 90110. & Email: flywizme @ gmail. com & urn: lsid: zoobank. org: author: A 18861 BF- 9717 - 4661 - 94 AD- 2599 CEE 6 E 9 B 7 flywizme@gmail.com Author Satasook, Chutamas 97FDD929-CC25-400F-88B5-48D695662D75 Princess Maha Chakri Sirindhon Natural History Museum of the Prince of Songkla University (NHM-PSU), Hat Yai, Songkhla, Thailand, 90110. & Email: Chutamas. p @ psu. ac. th & urn: lsid: zoobank. org: author: 97 FDD 929 - CC 25 - 400 F- 88 B 5 - 48 D 695662 D 75 hutamas.p@psu.ac.th Author Grootaert, Patrick B80BC556-9087-4D0D-9D69-7FA9BE5779C4 Department of Entomology, Royal Belgian Institute of Natural Sciences (RBINS), Vautierstraat 29, 1000 Brussels, Belgium. & urn: lsid: zoobank. org: author: B 80 BC 556 - 9087 - 4 D 0 D- 9 D 69 - 7 FA 9 BE 5779 C 4 & Corresponding author: Patrick. Grootaert @ naturalsciences. be rootaert@naturalsciences.be text European Journal of Taxonomy 2017 2017-06-12 329 1 40 journal article 22095 10.5852/ejt.2017.329 a1384ecd-d70a-40ce-a26e-04b03329db4c 2118-9773 3829427 1B76ED6D-6AD8-4C13-9F1E-63E16A617DBE Thinophilus spinatoides sp. nov. urn:lsid:zoobank.org:act: 6B1C7B5E-A676-4A5D-A67A-07CF3E6356D1 Figs 25–29 Diagnosis A medium-sized species with very long yellow legs. Both male and female with a set of 4–5 long, stiff brown ventral bristles on fore femur. Fore femur spindle-shaped, basal quarter much dilated. Fore tarsomere 1 very long and slender, twice as long as fore tibia. Tarsomere 3 contrastingly yellowish white, tarsomeres 4 and 5 widened, black. Etymology The specific epithet refers to the resemblance with T. spinatus sp. nov. , also described from southern Thailand . Type material Holotype THAILAND : ♂ , Bakan Tohtid , Langu , Satun Province , 6°47′29.8 ″ N , 99°48 ′ 53.5 ″ E , sweep netting, 3 Jun. 2015 , A. Samoh leg. ( NHM-PSU ). Paratypes THAILAND : 2 ♂♂ , 1 ♀ , same collection data as for holotype . Description Male ( Fig. 25 ) LENGTH. Body 4.5 mm ; wing 3.8 mm . HEAD. Frons and face with shiny dark metallic green ground colour. 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 postoculars uniseriate, short, black; with a few yellow lower postoculars. Antenna yellowish. 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. 2 short black propleural bristles. LEGS. Yellow, with apical 2 tarsomeres of all legs black. Fore coxa with basal quarter darkened; mid and hind coxae black, tip yellow. Coxa anteriorly with a short bristle near base and a long bristle at basal third. Trochanter with short white bristles. Fore femur club-shaped, very thickened in basal quarter; apical ¾ very thin. Ventrally with 4 long black bristles; longest bristle nearly twice as long as femur is wide; others shorter. Fore tibia much longer than femur, without ventral bristling. Fore tarsomere 1 very long and slender, twice as long as fore tibia. Tarsomere 3 contrastingly yellowish white, tarsomeres 4 and 5 widened, black. Mid coxa with a short black exterior bristle above middle; anterior bristles short, black. Mid femur ventrally without bristles; no preapical av. Mid tibia longer than mid femur, with a crown of short apical bristles and 2 minute ad. Mid tarsomere 1 almost twice as long as following tarsomeres. Hind coxa without exterior bristle. Hind femur without ventral bristles; no preapical anterodorsal bristles. Hind tibia with 2 short ad and crown of apical bristles. Hind tarsomere 1 a little longer than tarsomere 2. WINGS. Uniformly yellowish tinged, without spots. Tp straight, apical part of M 3+4 1.5 times as long as Tp. Anal vein not reaching wing margin. Fig. 25. Thinophilus spinatoides sp. nov. , ♂, habitus. ABDOMEN. Shining dark metallic green. Hairs and hind-marginal bristles on tergites short, black. Sternites without bristles, except sternite 4 with tuft of short black bristles. TERMINALIA ( Figs 27–29 ). Phallus long, strap-shaped. Cerci pale brownish, with pale hairs, dorsally fused ( Fig. 29 ). Female ( Fig. 26 ) LENGTH. Body 4.5 mm long, wing 4.2 mm long. Fig. 26. Thinophilus spinatoides sp. nov. , ♀, habitus. BODY. Similar to male except for following characters: fore femur basally not so strongly swollen as in male and with 5 strong black ventral bristles up to 3 times as long as femur is wide; tarsomere 1 of fore and mid legs more than twice as long as following tarsomeres together; sternites 3, 4, and 5 with pale bristles. Figs 27–29. Thinophilus spinatoides sp. nov. , ♂, terminalia. 27 . Genital capsule, ventral view. 28 . Genital capsule, lateral view. 29 . Genital capsule, dorsal view. Distribution Southern Thailand (Andaman Sea coast). Remarks Thinophilus spinatoides sp. nov. is particular in that it has the fore femur with the basal quarter very spindle-shaped and dilated. It is less dilated in T. spinatus sp. nov. Fore tibia much longer than fore femur; shorter in T. spinatus sp. nov. Fore tibia slender and without ad in male, present in female; fore tibia stouter and with 2 long ad in T. spinatus sp. nov. Fore tarsomere 3 contrastingly yellowish white, tarsomeres 4 and 5 much widened, black. Fore tarsomere 3 has the same pale yellowish colour as tarsomeres 1 and 2. Tarsomeres 4 and 5 black, not widened in T. spinatus sp. nov. Only base of fore coxa brown; basal ⅔ of fore coxa brown in T. spinatus sp. nov. Lower postocular bristles yellow; black in T. spinatus sp. nov. Anal vein distinct in basal ⅔; anal vein not distinct at all in T. spinatus sp. nov.