Teuchophorus chaetifemoratus, Pollet, Marc A. A. & Kechev, Mihail, 2007

Pollet, Marc A. A. & Kechev, Mihail, 2007, A review of Palaearctic Teuchophorus, with a new species from Bulgaria (Diptera: Dolichopodidae), Zootaxa 1592, pp. 45-56 : 47-49

Teuchophorus chaetifemoratus sp.n.

Description. Male. Head. Face with upper 2/5 of epistoma bluish green and lower 3/5 and clypeus silvery white; distinctly narrowing towards clypeus, not reaching lower eye margin; at clypeus 0.5 x as wide as 1st flagellomere is long. Frons shining dark metallic blue (bluish green in wet specimens, similar to T. monacanthus ), sides slightly dusted. Occiput convex, metallic bronze green. Uppermost 6 postocular bristles dark brown, lower 8 yellowish. Postvertical bristles indistinct, equal-sized as postoculars, in line and not separated from latter. External vertical bristles strong, converging, inserted at level of posterior edge of ocellar tubercle. One pair of strong intraocellar bristles. One pair of minute postocellar bristles. Palp very small, blackish brown, with brown pubescence and one strong apical brown bristle. Proboscis, blunt, 1/6 of eye, brown. Antenna almost entirely blackish brown, scape entirely, and 1st flagellomere paler on apical 1/2; scape bare, pedicel with medial ring of bristles; 1st flagellomere with rather blunt apex, 3/4 as long as wide, and 2/3 as long as scape and pedicel combined; arista dorsal, with short pubescence, 3.6 x as long as the first three antennal segments combined ( Fig. 2 ).

Thorax. Mesonotum including scutellum shining dark bluish green. Pleura and postnotum dark green, slightly dusted greyish. Metaepimera mainly dark green, with lower apex pale yellow. All bristles blackish brown. Upper propleura with 1–2 minute dark setae, lower propleura with 3 small yellow prothoracic setae; 5 ac, rather strong, irregularly biserial; 6 dc, equal-sized; 1 strong and 1 minute humeral, 1 strong presutural, 1 sutural, 2 notopleural, 2 supraalar, and 1 strong and 1 minute postalar bristle; only medial pair of strong scutellar bristles present; scutellum with sparse marginal fringe of minute, white setae.

Abdomen. Tergites and sternites concolorous, shining dark green, with 6 pubescent segments, with black pubescence and bristles. Sternites complete (without caudal invagination). Hypopygium ( Figs 3–4 ) enclosed; genital capsule concolorous with abdomen. Hypandrium brown, triangular in ventral view; surstylus dark brown, bilobate; ventral lobe of surstylus with rather equal width along entire length, bearing two large epandrial setae; dorsal lobe of surstylus triangular, partly covered by ventral lobe and bearing one strong subapical bristle; cercus small, roundish, white.

Wing ( Fig. 1 ) transparent, 3.1 x as long as wide; with dark veins and distinct basal costal swelling (MSSC). Proximal section of vein M1 0.8 x as long as apical section. Proximal section of vein CuA1 1.9 x as long as apical section. CuA x ratio 2.2. Veins R4+5 and M1 parallel, very slight diverging at wing apex. Wing length 1.9–2.1 mm (n = 2).

Legs ( Figs 5–7 ) including coxae and trochanters largely pale yellow; with coxa II and III pale yellow with brownish tinge; femur III infuscated dorsally, especially in apical 1/2; tibia III infuscated brownish along entire length; tarsus in all legs brown from apex of 1st tarsomere onwards (in wet specimens, only tarsomeres I–III3-5 apparently brown). Coxa I with sparse brown pubescence and 5 pale brown apical bristles. Femur I with two small av and one larger pv preapical bristles. Tibia I simple, without dorsal bristles and with yellow apicoventral comb. Tarsus I with tarsomere I1 with distinct ventral serration of inclined bristles, bristles not as long as tarsomere is deep (MSSC). Length ratios of leg I: 6.9/7.0/3.9/1.7/1.3/1/1.1. Coxa II with yellowish bristles on anterior face. Femur II with one (two in paratype) thin basoventral bristle at basal 1/6, nearly as long as femur is deep (MSSC); with sparse row of small strongly inclined pv bristles along entire length; with one strong av and one strong pv preapical bristle. Tibia II with two strong ad and one strong pd bristles, 2.7 x as long as tibia is wide; ad bristles inserted at about basal 1/4 and basal 3/5; with 3 ap bristles. Length ratios of leg II: 8.5/9.2/4.4/1.9/1.5/1.1/1. Coxa III with dark brown bristle, inserted at basal 1/3 and posterior 1/3. Femur III with one vt and one pv row of strong pale brown bristles on apical 4/5 (MSSC); basal bristles strongest, 1.7 x as long as femur is deep; vt bristles decreasing in length towards apex, pv bristles shortest in middle; with one strong ad and one indistinct pv preapical bristle. Tibia III slightly swollen towards apex, with two pd bristles inserted beyond basal 1/4 and basal 3/5 amid pd serration on apical 2/3; with apical pv yellow comb, and three strong and one small ap bristles. Tarsus III with tarsomere III1 with one vt bristle at basal 3/5, about as long as tarsomere is deep (not considered a MSSC, as 1–3 similar vt bristles were present in all 44 Teuchophorus female specimens of the Bulgarian sample); with preapical pv yellow comb. Length ratios of leg III: 9.2/10.3/2.7/2.9/1.9/1.3/1.

Body length 1.2 mm (dry specimen) – 1.7 mm (wet specimen).

Female. Unknown (although a sample of female Teuchophorus collected at the type locality was at our disposal, it appeared impossible to distinguish T. chaetifemoratus females from among the T. simplex specimens).

Etymology. The species name refers to the ventral and posteroventral row of strong bristles of femur III in the male.

Type material. Holotype: 1 ď, BULGARIA: Plovdiv province, Rhodopes Mountains, Markovo, 300 m, humid grassy habitat within cool deciduous forest with clean shallow streams at the foot of the mountains, 8.vii.2006, SW, leg. M. Kechev ( SOFM; D).

Paratypes: 1 ď, same data (University of Plovdiv, D); 1 ď, same data ( IRSNB; D); 1 ď, same data (Pollet, pers. collection; W – with one antenna, wing, leg I, II and III, and hypopygium mounted on microscopic slide).

Figures

FIGURES 1 – 7. Teuchophorus chaetifemoratus sp. n. (male paratype): 1, wing; 2, antenna; 3, hypopygium (lateral view, left); 4, hypopygium (ventral view); 5, leg I; 6, leg II; 7, leg III; cer, cercus; dsur, dorsal lobe of surstylus; eps, epandrial setae; hyp, hypandrium; ph, phallus; vsur, ventral lobe of surstylus.