Nothybus lineifer Enderlein

Lonsdale, O. & Marshall, S. A., 2016, Revision of the family Nothybidae (Diptera: Schizophora), Zootaxa 4098 (1), pp. 1-42 : 22-25

publication ID	https://doi.org/ 10.11646/zootaxa.4098.1.1
publication LSID	lsid:zoobank.org:pub:6A79B596-26E0-454B-8830-D69FFCBC4684
DOI	https://doi.org/10.5281/zenodo.6053696
persistent identifier	https://treatment.plazi.org/id/03C387D6-8A2D-2259-EA84-6CC5EDFAFDA9
treatment provided by	Plazi
scientific name	Nothybus lineifer Enderlein
status

Treatment

Nothybus lineifer Enderlein View in CoL

Figures 7, 47–54, 73, 74, 75, 96–101

Nothybus lineifer Enderlein 1922: 176 View in CoL . Aczél 1955: 10 [family revision, key]; Steyskal 1977: 30 [Oriental catalogue]. Nothybus decorus Meijere 1924: 30 View in CoL . Meijere 1924: 30 [illustration of wing]; Aczél 1955: 10 [family revision, key]; Steyskal 1977: 30 [Oriental catalogue]; D.K. McAlpine 1997b: 188 [illustration of antenna, lateral habitus and prosternum]. Syn. nov.

Description. Head: Yellowish-orange in base colour. Frons with faint, transverse, white pruinose band at level of ocellar tubercle; anterolateral velvety patches on frons confluent with dark parafacial, and with inner margins converging anteriorly (diverging in remainder of genus); ocellar tubercle black. Distal half of first flagellomere black. Face with dorsal half microtomentose and minutely setulose with ventral margin brown; ventral half white pruinose with glossy medial dark brown tubercle (confluent with, or narrowly separated from brown region dorsally) that may be paler in specimens that have more orange on thorax. Back of head with white dorsolateral pilosity above one pair of broad dark brown lateral spots. Mouthparts light yellow with prementum brown and labellum with faded black lateromedial spot.

Thorax: Notum mostly brown to dark brown with slight greyish pruinescence; scutum also with matt black patches on anterior margin and anterolaterally adjoining notopleuron; slight orange tint on anterior margin of scutum, on anterolateral margin of postsutural scutum, venter of postpronotum, and notopleural tubercle; sometimes with wide medial orange region anterior to suture (if so, overall pigment paler, and facial tubercle and subscutellum orange with brown tint). Scutellum and subscutellum dark brown with ventroapical margin of scutellum yellowish-orange and venter of subscutellum yellowish-orange in CNC male (Figs 52, 54). Metanotum brownish, darker posteriorly on katatergite. Pleuron mostly yellowish-orange; margins of proepisternum dark brown; anepisternum brownish, becoming darker posteriorly before whitish posterior margin; posterodorsal corner of katepisternum whitish. Scutum with four regular, widely spaced rows of presutural acrostichal setulae, including those of additional lateral rows, which are not separated.

Wing: ( Figs 73, 75 View FIGURES 67 – 78 ) Wing length 5.0–6.3. Very lightly infuscated with distal region past transverse band slightly darker. Distal margin with brown mottling apically on R2+3 and R4+5; M1 with pale apical mottling and darker subapical cloud. Brown transverse stripe (barely or not reaching costa) fading posteriorly to CuA1 at dm-cu; stripe slightly more basal in position relative to congeners, not following dm-cu posteriorly, but only touching that vein along its posterior margin; stripe narrow and of equal width along length (approximately equal to width of cell dm at level of r-m); not extending into apex of cell r1. Three clear, iridescent, subapical spots elongate and irregular, with middle spot displaced apically. Apical cloud on CuA1 absent. Vein dm-cu and r-m surrounded by narrow brown cloud. Base of R4+5 with one very small setula ventrally.

Legs: Yellowish-orange base colour. Apices of femora dark brown with pigment more extensive on posterior surface. Tibiae dark brown. Fore tarsus white, sometimes with apical segment faintly brownish, and mid and hind tarsi dark brown.

Abdomen: Yellowish-orange base colour. Tergite 2 black excluding broad yellow patch in anterolateral corner. Tergites 3–5 black, sometimes with orange sublateral tint. Tergite 5 black velvety. Tergite 6 black with lateral surface velvety in female.

Male terminalia: ( Figs 96–101 View FIGURES 96 – 101 ) Sternite 6 ill-defined, slightly wider than long, with two pairs of long lateromedial setae. Sternite 7 not evident. Sternite 8 large, well developed, setose posterolaterally. Epandrium well developed, fused to surstylus with suture slightly evident at anterior margin. Surstylus slightly shorter than epandrium, subtriangular, attenuating slightly less on basal third, and with apex narrowly truncated and oblique. Cercus broad, flat, setose on inner half. Subepandrial sclerite well developed, confluent with inner surface of surstylus, minutely tuberculate apically. Hypandrium with small patch of short setae on recessed inner-distal section; posteroventral margin produced into one pair of prominent, setose, rounded lobes with one pronounced seta basally and apically. Pregonite narrow, base slightly widened, comparatively slender; slightly arched and tapered apically (seen laterally), with clear, minutely spinulose apex, one strong basal seta and one irregular row of small lateral setae. Basiphallus sclerotized dorsally and dorsolaterally; with separate lateroventral sclerotized section bearing thin, slightly raised ridges and minutely textured apex. Distiphallus with long, ribbon-like basal section with surface minutely textured, with midline desclerotized but with regular transverse ridges, and more than three times wider than abruptly narrowed apical section; apex of phallus terminating in one pair of clear flagellae, one short, one long. Ejaculatory apodeme well developed with blade mostly clear, base and sperm pump narrow.

Variation: Sometimes as described above except as follows: wing pigment pronounced and more extensive, with larger, more distinct apical brown spots on R2+3 and R4+5, and subapically on M1 ( Fig. 74 View FIGURES 67 – 78 ); with thicker transverse brown stripe, which is broader than apex of cell dm and nearly confluent with apical spot on R2+3. Abdominal tergites 3 and 4 with orange sublateral tint.

Distribution. Indonesia (Java, Sumatra, Borneo), Malaysia (Pahang, Sabah, Sarawak, Selangor), Thailand.

Syntypes [ lineifer ]: INDONESIA. Sumatra: Ober-Langkat, Deli, Sumatra (1♀, ZMHU), N.O. Sumatra, Deli, Dr. Martin S.G. (1♂, ZMHU).

Syntype [ decorus ]: INDONESIA. Balun, Pad[ang]., Bov[enland]., Edw. Jacobson, “Sum. VI.1914 ”, Type No. DIPT.0748.1 (1♀, ZMAN).

Additional material examined. INDONESIA. Java: Roban, F. Muir (1♀, BPBM), W Borneo: Mowong, F. Muir, viii.1907 (2♀, BPBM). MALAYSIA. Pahang: Genting Highlands, Road Junction, 15.vi.1973, D.K. McAlpine (1♂, CNC), Genting Highlands, Road Junction, 15.vi.1973, D.K. McAlpine (1♂ 4♀, AMSA), Sabah: British N Borneo, Sandakan Residency, Gomantong Caves, 20mi S Sandakan, 22–26.xi.1958, T.C. Maa (1♂, BPBM), N. Borneo, Samawang, nr. Sandakan, 4.viii.1927 (1♀, BMNH), jungle, 9.vii.1927 (1♀, BMNH), Sarawak: Foot of Mt. Dulit, Junction of rivers Tinjar & Lejok, 5.x.1932, old secondary forest, “ Nothybus ? lineifer End. ” [handwritten] Examined & det. By W. Hennig, 1937 (1♀, BMNH), 20.ix.1932 (1♂, BMNH), Sabah (Borneo): Penampang Distr., Crocker Range, Kipandi Butterfly Park, 720m, 5˚52′20ʺN, 116˚14′53ʺE, 2.iii.2013, S. Gaimari & M. Hauser (1♂, CSCA), Sabah: Penampang Distr., Crocker Range, Moyog, Moyog River, 300m, 5˚53′02ʺN, 116˚14′48ʺE, 11.iii.2013, M. Hauser (2♂, CSCA), 6.iii.2013 (3♀, CSCA), Sarawak: 3rd Division, Kapit Distr., Sg. Mengion (nr.) Ng. Tekalit, 1:37ʹN, 113:35ʹE, viii–ix.1971, K.L. Frogner (4♂ 2♀, BPBM), Sarawak: Semongok Forest Res., 24km S of Kuching, 15–20.iii.1968, D.E. Hardy (1♂, BPBM; 1♂, CNC), Sarawak: Sungei Menjuau, nr Sungei Tekalit, viii–ix.1971, K.J. Frogner (1♀, CNC), Sarawak: foot of Mt. Dulit, junction of rivers Tinjar & Lejok, 13.ix.1932, Oxford Univ. Exp., B.M. Hobby & A.W. Moore, B.M.1933-254 (1♂, BMNH), Selangor: Templer Park near Kuala Lumpur, 14.vi.1973, D.K. McAlpine (1♂, AMSA). THAILAND. “ Siam ”, Talum, 20.i.1902, H.C. Robinson & N. Annandale, 1916-21 (1♂, BMNH).

Comments. The only feature that appears to differentiate the type specimen of Nothybus decorus from those of N. lineifer is degree of pigmentation, especially on the wing. The male and female syntypes of N. lineifer appear particularly pale on both the wing ( Fig. 73 View FIGURES 67 – 78 ) and thorax (Fig. 51), although at least some of this may be an artifact of poor preservation and/or light bleaching. The wing of the N. decorus syntype ( Fig. 74 View FIGURES 67 – 78 ) is bolder—the pigment is darker brown and more extensive, the brown (sub)apical spots on R2+3, R4+5 and M1 are distinct, and the transverse stripe is dark, broad and nearly connected to the apical spot on R2+3.

Most non-type specimens appear to have a darker thorax (Figs 52, 54), as in the type of N. decorus ( Figs. 47– 49 View FIGURES 47 – 49 ), but the wing ( Fig. 75 View FIGURES 67 – 78 ) is only slightly more broadly pigmented on the transverse band and apically on R4+5, M1 and sometimes R2+3. Recent collections from Malaysia (CSCA), however, include specimens with the extreme wing pattern seen in the N. decorus type as well as specimens with less pigmented wings. The type specimens of these two species probably represent the extreme ends of within-species variation.

Nothybus lineifer is here recorded from Java, Malaysia and Thailand for the first time.