Leluthia ( Leluthia ) brevitergum, Belokobylskij, 2020

Leluthia ( Leluthia) brevitergum sp. nov.

( Figs 3, 4)

Holotype. Female , Yemen, “Yemen (3901), Al Kowd, vii 1999, light-trap, A. v. Harten & S. Al Haruri. RMNH’00” ( RMNH).

Paratypes. 2 males, “ Yemen (3901), Al Kowd , VII 1999, light-trap, A. v. Harten & S. Al Haruri. RMNH’00” ( RMNH, ZISP) ; 2 females, “ Yemen (4054), Al Kowd , viii 1999, light-trap, A.v. Harten & S. Al Haruri, RMNH’00” ( RMNH, ZISP) ; 1 male, “ Yemen, Al Kowd , ii.2000, light tr., no 4431, A. v. Harten & S. Al Haruri. RMNH’01” ( RMNH) ; 2 females, 1 male, “ Yemen, Al Kowd , v–vi.2000, light tr., no. 4719, A.v. Harten & S. Al Haruri. RMNH’01” ( RMNH) ; 1 male, “ Yemen (8136), Al Kowd , ix.2003, light trap, A. v. Harten, S. Al Haruri, RMNH’03” ( RMNH) ; 1 female, 1 male, “ Yemen (5404), Hammam ‘ Ali, from coffee-berries (with Ceratitis capitata ?), 14.iii.2001, A.v. Harten, RMNH’02” ( RMNH) .

Description. Female. Body length 2.5–3.2 mm; fore wing length 1.5–2.0 mm.

Head width (dorsal view) 1.6–1.8 times its median length, 1.1 times width of mesoscutum. Head behind eyes (dorsal view) distinctly roundly narrowed. Transverse diameter of eye 2.7–2.9 times longer than temple. Ocelli arranged in triangle with base 1.15–1.25 times its side; POL 1.3–1.6 times OD, 0.8–1.0 times OOL. Eye large, glabrous, 1.1–1.2 times as high as broad, almost not concave opposite antennal socket. Malar space 0.20–0.25 times eye height, 0.6–0.8 times basal width of mandible. Face width 0.6–0.8 times eye height and 1.0–1.1 times height of face and clypeus combined. Malar suture absent. Clypeus rather narrow and high. Hypoclypeal depression subcircular, its width 0.9–1.0 times distance from edge of depression to eye, 0.4 times width of face. Occipital carina not joining hypostomal carina, being obliterated ventrally a short distance above base of mandible. Hypostomal flange very narrow.

Antennae rather thick, filiform, 20–23-segmented, 0.8–0.9 times as long as body. Scape 1.3–1.5 times longer than maximum width, 1.5– 1.8 times longer than pedicel. First flagellar segment 3.3–3.8 times longer than its apical width, 1.00–1.05 times longer than second segment. Penultimate segment about 2.0 times longer than its width, 0.6–0.7 times as long as first segment, 0.80–0.85 times as long as apical segment; the latter acuminate apically and with short spine.

Mesosoma almost not depressed dorsoventrally, it length 2.0–2.1 times maximum height. Neck of prothorax elongate, with distinct pronotal keel in anterior 0.3. Mesoscutum (lateral view) distinctly and curvingly elevated above pronotum; its width (dorsal view) 1.10–1.15 times median length. Notauli complete, shallow to very shallow in posterior third, rather wide, crenulate-rugose. Median lobe of mesoscutum (dorsal view) distinctly convex anteriorly, without median longitudinal furrow. Prescutellar depression (scutal sulcus) rather shallow, with five–seven curved carinae, very finely rugulose to almost smooth between carinae, 0.3–0.4 times as long as scutellum. Scutellum with distinct carinae laterally, 1.2–1.3 times wider anteriorly than its median length. Subalar depression rather shallow and rather wide, crenulate-striate with fine reticulation. Sternaulus shallow, straight, finely reticulate, sometimes with fine crenulation, running along anterior 0.7 of lower part of mesopleuron. Metapleural flange narrow, rather short and rounded apically. Propodeum without lateral tubercles.

Wings. Length of fore wing 3.0–3.1 times its width. Metacarp (1-R1) 1.0–1.1 times as long as pterostigma. Radial vein (r) arising before middle of pterostigma, from its basal 0.35–0.40. First radial abscissa (r) 0.20–0.25 times as long as the weakly evenly curved second abscissa (3-SR + SR1), 0.7–0.8 times as long as first radiomedial vein (2-SR). Second radiomedial vein (r-m) always absent. First medial abscissa (1-SR+M) distinctly sinuate. Recurrent vein (m-cu) weakly antefurcal, 3.5–4.5 times longer than second abscissa of medial vein (2-SR+M). Distance from nervulus (cu-a) to basal vein (1-M) 1.3–1.5 times nervulus (cu-a) length. Hind wing 4.0–4.5 times longer than wide. First abscissa of costal vein (C+SC+R) 0.8–1.0 times as long as second abscissa (1-SC+R). Basal vein (1r-m) 1.1–1.4 times longer than third costal abscissa (2-SC+R). Medial (basal) cell narrow, weakly widened posteriorly, 7.0–9.0 times longer than wide. First abscissa of mediocubital vein (M+CU) 2.0–2.3 times longer than second and third abscissae combined (1-M). Recurrent vein (m-cu) weakly and evenly curved towards base of wing, interstitial or weakly postfurcal, unsclerotised.

Legs. Hind femur 2.8–3.0 times longer than wide. Hind tibia distinctly thickened. Hind tarsus 0.9 times as long as hind tibia. Hind basitarsus weakly thickened, 0.45–0.50 times as long as second–fifth segments combined. Second segment of hind tarsus 0.6–0.7 times as long as basitarsus, almost as long as fifth segment (without pretarsus).

Metasoma 1.2–1.3 times longer than mesosoma and head combined. First metasomal tergite short and wide, without spiracular protuberances, distinctly and almost linearly widened from base to subapex and then weakly narrowed towards apex. Length of first tergite 0.75–0.80 times its maximum subapical width; apical width 0.90– 0.95 times its subapical width, 1.8–2.0 times its minimum anterior width. Second tergite short, with shallow and strongly oblique sublateral depressions. Median length of second tergite 3.0– 5.0 times its minimum sublateral length, 0.2–0.3 times its basal width, 0.5–0.9 times length of third tergite. Second suture distinct, distinctly sinuate and with deep sublateral breaks. Third tergite with very shallow and weakly curved submedi- an transverse furrow. Ovipositor sheath 0.4–0.5 times as long as metasoma, 0.75–0.85 times as long as mesosoma, 0.45–0.50 times as long as fore wing.

Sculpture and pubescence. Vertex and frons entirely densely granulate; face almost entirely finely transverse and sinuate striate with dense rugulosity between striae, laterally almost smooth below; temple finely coriaceous to smooth below. Mesoscutum distinctly densely granulate, rugulose and undulately striate in a rather wide area in medio-posterior third or half. Scutellum distinctly densely granulate. Mesopleuron mostly densely granulate with reticulation, becoming finer below. Metapleuron entirely densely rugose-reticulate with fine granulation. Propodeum without areas delineated by carinae, entirely rugose-reticulate. Hind coxa mainly reticulate-coriaceous, dorsally rather distinctly rugose-striate. Hind femur distinctly reticulate-coriaceous. First metasomal tergite entirely distinctly undulatingly striate, with dense rugulosity between striae, and with two distinct, complete and subparallel dorsal carinae. Second tergite entirely and third tergite mainly (except smooth narrow posterior strip) densely striate and with dense and fine rugulosity between striae. Fourth to sixth tergites mainly densely and finely reticulate-areolate, smooth at distal margins, fourth tergite additionally striate basally. Vertex with sparse, short and semi-erect whitish setae. Mesoscutum widely glabrous, with sparse, medium length and semi-erect white setae arranged rather widely along notauli and narrowly laterally. Mesopleuron medially widely glabrous. Hind tibia dorsally with medium length and rath- er sparse semi-erect pale setae, their length 0.6– 0.7 times maximum width of tibia.

Colour. Body light reddish brown to partly yellowish brown, partly faintly infuscate dorsally. Antenna dark brown to black in distal half, scapus reddish brown, five–ten basal segments yellow to brownish yellow. Palpi pale yellow. Legs mainly yellow to pale yellow. Ovipositor sheath black. Fore wing hyaline. Pterostigma pale brown, sometimes weakly infuscate medially.

Male. Body length 1.7–2.8 mm; fore wing length 1.1–1.7 mm. Transverse diameter of eye sometimes up to 3.5 times longer than temple. Antenna weakly thickened, 17–23-segmented. Mesosoma sometimes weakly depressed dorsoventrally, it length only 2.1–2.2 times height. Hind wing with large sclerotised brown stigma-like enlargement, its length 1.4–1.6 times distance from base of wing to base of enlargement. First metasomal tergite usually narrow, its length 0.8–1.0 times maximum width. Second tergite without oblique lateral furrows, long, 0.5–0.6 times as long as basal width, 0.8–0.9 times as long as third tergite. Second suture almost straight or weakly curved, without or with weak sublateral breaks. Third tergite without transverse furrow. Otherwise similar to female.

Comparative diagnosis. The new species is similar to the Palaearctic L. ( L.) disrupta (Belokobylskij, 1994) , but differs in having the first and second metasomal tergites and ovipositor short ( vs distinctly longer), sublateral furrows on second tergite strongly oblique ( vs weakly oblique to subparallel), pterostigma mainly pale brown ( vs entirely dark brown) and legs pale reddish brown to reddish brown ( vs mainly yellow).

Etymology. Named from Latin “brevis” (short) and “tergum” (tergite) because its second metasomal tergite is very short.

Distribution. Yemen.

Key to Arabian species of the genus Leluthia View in CoL

1. Transverse diameter of eye 2.0–2.2 times longer than temple. Notauli on dorsal part of mesoscutum subparallel posteriorly. Suture between second and third metasomal tergites strongly evenly curved forwards and without sublateral breaks. Second metasomal tergite without oblique sublateral furrows. Body length 1.6–3.1 mm. Yemen................................. L. ( L.) abnormis sp. nov.

– Transverse diameter of eye 2.7–2.9 times longer than temple. Notauli on dorsal part of mesoscutum convergent posteriorly. Suture between second and third metasomal tergites medially curved backwards and with distinct sublateral breaks. Second metasomal tergite with strongly oblique sublateral furrows. Body length 1.7–3.3 mm. Yemen........................... L. ( L.) brevitergum sp. nov.