Campeprosopa longispina ( Brunetti, 1913 )

Mason, Franco & Nÿ, Rudolf Rozko Š, 2008, A review of the Oriental Campeprosopa species (Diptera: Stratiomyidae), Zootaxa 1794, pp. 49-64 : 59-63

Campeprosopa longispina ( Brunetti, 1913)

( Figs 23–43 )

Ampsalis longispinus Brunetti, 1913: 264

Type material: This species was originally based on 7 syntypes (2 males and 5 females) from northern India. The examined male is labelled as follows: Lord Carmichael’s collection Darjiiling dist. Singla alt. 1500 ft. April 1913, SYNTYPE Ampsalis longispinus Brunetti det. J.E. Chainey 1982, LECTOTYPUS Ampsalis longispinus Brunetti, 1913: 264 , F. Mason & R. Rozkošný des. 2006. In good condition, male terminalia in a microvial on the same pin. The lectotype is designated here to fix the present concept of the species.

The second specimen examined, a paralectotype, is a female with the same locality label but elevation only 1500 ft and a date April 1913. Additional labels are Ψ, Brun. Cotype (in Brunetti´s handwriting), Pres. By E. Brunetti Brit. Mus. 1927-184, SYNTYPE Ampsalis longispinus Brunetti det. J.E. Chainey 1982, PARALECTOTYPUS Ampsalis longispinus Brunetti 1913: 264 , F. Mason & R. Rozkošný des. 2007.

Diagnosis: The male eyes are touching, the subantennal protuberance is swollen and densely haired ventrally, the scutellar spines are at least three times longer than the scutellum and the females possess a prominent wartlike projection in the middle of sternite 2.

Description: Male ( Figs 23–33 ). Body length 9.6–11.8 mm, wing length 9.3–11.8 mm. Head almost hemispherical but distinctly longer than high ( Fig. 23 ). Ocellar tubercle conspicuously prominent. Bare eyes contiguous for a long distance starting abruptly in front of anterior ocellus and ending at base of subantennal prominence ( Fig. 24 ). Postocular rim not developed, also lower postocular area only slightly swollen. Subantennal prominence dark brown to black, bare and shining dorsally with a distinct longitudinal midline, swollen and densely black haired ventrally. Antenna ( Fig. 29 ) long, scape only slighhtly longer than pedicel, flagellum 3.0–3.3 times longer than both basal antennal segments combined; flagellar segments cylindrical but slightly flattened laterally, last two flagellomeres with short but dense fringe of hairs on dorsal and ventral margin. Last flagellomere unusually long, twice as long as last but one, not as expressively compressed laterally as in other species. Compared with other species the face is unusually broad and even broadened toward basis of proboscis, dark but predominantly yellow in lower half. Labellum and palpi bright yellow. Two-segmented palpus slender, slightly overreaching half length of labellum. Head pile limited to some black hairs on ocellar tubercle and especially beyond it, longer black hairs developed on lower side of subantenal prominence and basal segments of antenna. Face with fine erect hairs black and brown in upper part and pale yellow in lower half. Long and erect yellow hairs distinct on posterolateral angle of head. Proboscis with sparse but long yellow hairs.

Thorax ( Fig. 25 ) predominantly subshinig black, scutum and scutellum often with dark metallic bluish shade. Pronotum with transverse yellow band in distal half, postpronotal callus, narrow upper margin of anepisternum, postalar callus and upper posterior corner of anepisternum reddish yellow to reddish brown, also upper half of anepimeron often more yellow. Scutellum black, only very narrow lower posterior margin as well as space between spines yellowish. Scutellar spines ( Figs 27–28 ) unusually long, about 4.0 times longer than scutellum, diverging and usually only slightly upturned. Thoracic pile on scutum and scutellum consisting of short and appressed golden yellow hairs and long, fairly sparse and erect hairs. Pile on pleura predominantly yellow and semi-appressed, generally longer than in other species.

Wing ( Fig. 25 ) hyaline, densely covered with microtrichia but central area around discal cell and middle part of basal half predominantly bare. Stigma and veins dark brown. Last section of costa distinctly longer than last but one. Anterior crossvein oblique, distance between anterior crossvein and arising of R2+3 at least twice as long as anterior crossvein. Discal cell broadened in basal half, vein M3 arising in middle (or nearly so) between M2 and Cu1A, alula somewhat broader than in males of other two species. Narrow squamae pale brown, halteres pale yellow.

Legs ( Fig. 26 ) yellow with brown to black pattern. All coxae, femora and fore and mid tibiae yellow, hind tibia and basal 2/3 of hind basitarsus black, other tarsomeres yellow, only fore tarsomeres beginning of tips of basitarsi darkened. Pile on legs fine, inconspicuous, yellow, only posteroventral margin of fore and mid femur with some fine and long hairs. Black parts of hind leg covered with deeply black and dense hairs, less conspicous dark brown hairs also on darkened part of fore tarsus. Pale parts of hind tarsi almost white and densely whitish yellow.

Abdomen ( Fig. 24 ) usually relatively broader than in other species, suboval to slightly broadened towards the last third, yellow with brown to black pattern occupying greater part of tergite 1 (except for posterior corners), subtriangular posterolateral patches on tergite 2, similar but somewhat enlarged patches on tergite 3, broad transverse band leaving all lateral margin or at least corners yellow on tergite 4 and a transverse band in proximal half of tergite 5. Venter yellow, only sternite 1, posterior half of sternite 3 and almost all surface of tergites 4 and 5 (except for margins) brownish. Abdominal pile very shorth, dense, appressed and predominantly black dorsally, yellow and erect on lateral margin and venter, especially long at sides of tergites 1 and 2 and sternite 1, short and semierect on other sternites.

Male terminalia ( Figs 30–33 ) ochre yellow. Proctiger unusually long, epandrium transversely bandshaped, much shorter than broad ( Fig. 31 ). Genital capsule ( Fig. 30 ) with almost straight posterior margin but inner structures of three lobes distinct. Middle lobe slender and pointed, both lateral more rounded. Gonostylus with massive and dilated distal part, without any inner lobe or projection in middle of inner side. Phallic complex ( Figs 32–33 ) bipartite, each part only slightly globose apically, slender, proximal half only slightly dilated.

Female ( Figs 34–43 ). Body length 10.2–14.9 mm, wing length 10.2–14.5 mm. Head longer than high ( Fig.34 ), bare eyes almost circular in lateral view, only ocellar tubercle, upper part of postocular rim, subantennal prominence and very narrow and small lower postocular area prominent above eye outline. Frontal vitta ( Fig. 35 ) unusually wide, about 3.0 times as broad as ocellar tubercle, frontal index 1.3–1.4. Postocular rim beyond eye at least twice as broad as lateral ocellus with a distinct posterior ridge but abruptly reduced towards lateral end of upper third. Frons and upper postocular area black with a slight bluish shade, frons slightly arched in middle. Subantennal prominence and antennae as in male, face chiefly black, only large central area in lower half yellow, antennal index about 3.7. Facial margins of eye margined with a narrow silvery white stripe which gradually dilated at sides of subantennal prominence and pointed at inner end lying in a groove between subantennal prominence and lower frons. Head pile predominantly short, erect and white, only below ocellar tubercle on subantennal prominence and basal antennal segments black.

Thorax ( Fig. 36 ) similar as in male, pleura often darker, pale parts of anepimeron and katepisternum usually smaller, scutellar spines about 3.5 times longer than scutellum. Legs ( Fig. 39 ) as in male including constrastingly white hind tarsi beginning from distal third of basitarsus. Abdominal pattern ( Fig. 36 ) usually darker than in male, tergite 1, 4 and 5 with black transverse band and tergites 3 and 4 with paired blackish spots being extented innerward and subpointed on inner corners. Venter as in male but sternite 2 with a central wart-like or sometimes even short tube-like projection ( Figs 37–38 ) with unknown function.

Female terminalia ( Figs 40–43 ): Two-segmented cerci relatively long, both segments subequal ( Fig. 40 ). Genital furca ( Figs 41–43 ) pointed proximally and mostly with rounded lateral lobes distally. Posterolateral projections slender and relatively long. Central aperture apparently varies in its extent.

Variation: In one male from Shillong we found a tendency to a yellowish transverse submedian band on the hind tibia as in the typical specimens of C. flavipes . Some other colour characters also varies to a cetain extent: the pale spot on the postalar callus may be partly reduced or darkened to reddish-brown, the pleural pale spots may be reduced. The area between scutellar spines may be yellow or dark. Also the position of the scutellum and scutellar spines may be somewhat different, forming with the level of the scutum an angle between 15°–30°.

Remarks. Campeprosopa longispina is apparently the most apomorphic species from all three species of the genus. Autapomorphies are represented especially by the touching male eyes, a very broad female frontal vitta and face, a relatively broad and carinate upper postocular rim in the females, the long last flagellomere, the considerably long scutellar spines, some characters in the wing venation (the long last costal section, arising vein R 2+3 far beyond the anterior crossvein, the starting point of vein M 3 in the middle of the relatively narrow discal cell), the mid ventral projection on female sternite 2 and the shape of terminalia in both sexes.

Additional material examined:

India, Calcutta, 1 Ψ, Ekland, in FSMU. Meghalaya, Shillong, Botanical Gardens (about 1500 m a.s.l.), 20. iv.1980 4 ɗ 1 Ψ; Nongpoh-Forest, 25–28. iv.1980 5 ɗ, 2 Ψ, (half way between Shillong and Guwahati, at 700 m, a.s.l., in a tropical forest including bamboo), all A. Freidberg, in USNM. Thailand, Chiangmai, Fang, 500 m, 12–19. iv.1958 1 ɗ, T. C. Maa, in BPBM. Doi Inthanon, Bang Khun Klang, 18°32'N, 98°32'E, 1200 m, light trap, 13–20.viii.1988, 1 Ψ, Chantaramongkol & H. Malicky, in FSMU. Laos, 17 km NEE of Oudomxai, 20°45' N, 102°09' E, 1100 m, 1–9.v.2002, 1 Ψ; Louangphrabang, Thong Khan, 19°55'N, 101°58'E, 750 m, 11– 21.5 .2002 2 Ψ; Phongsaly env., 21°41'N, 102°06'E, 1500 m, 28.v. –20. vi.2003 3 ɗ, 1 Ψ; all V. Kubáň, in MMB.

Geographical distribution ( Fig. 44 ): India: West Bengal, Darjeeling District and Singla in the same District ( Brunetti 1913), Shillong ( Brunetti 1920), Darjeeling District, Gopaldhara; Assam, Khasi Hills ( Brunetti 1923) and material examined (see above). Thailand and Laos, see material examined.

Figures

FIGURE 44. Distributional map of the Campeprosopa species: C. borneensis, C. flavipes (some markings in the areas with accumulated collecting sites may represent 3 – 5 closely placed localities), C. longispina.

FIGURES 23 – 33. Campeprosopa longispina, male. 23. Head in lateral view. 24. Head in frontal view. 25. Body and wing in dorsal view. 26. Left hind leg. 27. Scutellum in lateral view. 28. Scutellum in dorsal view. 29. Antenna. 30. Genital capsule. 31. Dorsal part of male terminalia. 32. Phallic complex in lateral view. 33. Phallic complex in dorsal view. Scales: 1.0 mm (Figs 23 – 29), 0.1 mm (Figs 30 – 33).

FIGURES 34 – 43. Campeprosopa longispina, female. 34. Head and anterior part of thorax in lateral view. 35. Head in frontal view. 36. Body and wing in dorsal view. 37. Posterior part of thorax and abdomen in lateral view. 38. Sternite 2 in ventral view. 39. Left hind leg. 40. Female terminalia in ventral view. 41 - 43. Genital furca of paralectotype from India (41), female from Laos (42) and female from Calcutta (43). Scales: 1.0 mm (Figs 34 – 39), 0.1 mm (Figs 40 – 43).