Rhaconotus (Rhaconotus) magniareolus Belokobylskij, 2021

Belokobylskij, Sergey A. & Achterberg, Cornelis Van, 2021, Review of the braconid parasitoid subfamily Doryctinae (Hymenoptera, Braconidae) from the United Arab Emirates and Yemen, European Journal of Taxonomy 765 (1), pp. 1-143 : 114-118

Rhaconotus (Rhaconotus) magniareolus Belokobylskij sp. nov.

urn:lsid:zoobank.org:act:FF51F51C-7589-41E5-9D5E-FAF3BD514C02

Figs 51–52

Comparative diagnosis

This species is very similar to Rhaconotus testaceiceps (Cameron, 1910) from Indonesia ( Belokobylskij 2001b), but differs from the latter by having the posterior lenticular area of the second metasomal tergite medially long (short in Rh. testaceiceps ), first metasomal tergite narrow and long (wide and short in in Rh. testaceiceps ), brachial (second subdiscal) cell distally closed distinctly before recurrent vein (m-cu) (almost on the vein level in Rh. testaceiceps ), propodeum with unclear delineated basolateral areas (with distinctly delineated areas in Rh. testaceiceps ).

Rhaconotus magniareolus sp. nov. is also similar to Rh. arabicus , but differs from it in having the third and fourth metasomal tergites in the distal third without transverse furrows (with a deep and coarsely crenulate transverse curved furrow in Rh. arabicus ), second metasomal suture without a median break (with median break in Rh. arabicus ), fifth metasomal tergite entirely coarsely striate (at least medially widely smooth or almost smooth in Rh. arabicus ); legs mainly yellow (mainly reddish brown to dark reddish brown in Rh. arabicus ); second radiomedial (submarginal) cell longer (short in Rh. arabicus ).

Etymology

This new species is named after the strongly enlarged posterior area of the second metasomal tergite.

Material examined

Holotype YEMEN • ♀; “Yemen (4054), Al Kowd, viii.1999, light-trap, A.v. Harten & S. Al Haruri, RMNH’00”; RMNH.

Paratypes YEMEN • 2 ♀♀; same label data as for holotype; RMNH • 1 ♀, 1 ♂; same label data as for holotype; ZISP • 1 ♀; “Yemen (4055), Al Kowd , ix.1999, light trap, A.v. Harten & S. Al Haruri. RMNH’00”; RMNH • 3 ♀♀; “Yemen (3901), Al Kowd , vii.1999, light-trap, A.v. Harten & S. Al Haruri. RMNH’00”; RMNH • 1 ♀; “Yemen, Al Kowd , xi.2000, light trap, no 4947/5290, A.v. Harten & S. Al Haruri. RMNH’01”; RMNH • 1 ♀; same label data as for preceding; ZISP • 2 ♀♀; “Yemen, Al Kowd , vii.2000, light tr., no 4820, A.v. Harten & S. Al Haruri, RMNH’01”; RMNH • 4 ♀♀, 1 ♂; “Yemen, Al Kowd , v–vi.2000, light tr., No 4719, A.v. Harten & S, Al Haruri, RMNH’01”; RMNH • 1 ♀; same label data as for preceding; ZISP • 1 ♀; “Yemen, Al Kowd , i.2001, light tr., no 5482, A.v. Harten & S. Al Haruri. RMNH’02”; RMNH • 1 ♀; “Yemen (5750), Al Kowd , 8–12.vii.2001, light trap, A.v. Harten & S. Al Haruri. RMNH’02”; RMNH • 1 ♀; “Yemen (6141), Al Kowd , 16–20.viii.2001, light trap, A.v. Harten & S. Al Haruri. RMNH’02”; RMNH • 2 ♀♀; “Yemen (8136), Al Kowd , ix.2003, light trap, A.v. Harten, S. Al Haruri, RMNH’03”; RMNH • 1 ♀; “Yemen (5404), Hammam ‘Ali, from coffee-berries (with Ceratitis capitata ?), 14.iii.2001, A.v. Harten, RMNH’02”; RMNH • 1 ♀; “Yemen (no 2910), Ta’izz, light trap, 5.i–2.ii.1998, A.v. Harten, RMNH’98”; RMNH • 1 ♀; “Yemen (no 2989), Ta’izz, light trap, 1–3.iv.1998, A.v. Harten & Ahmad Ahwad, RMNH’98”; RMNH • 1 ♂; “Yemen, Ta’izz, viii.1999, light tr., no 4056, A.v. Harten & A. Awad, RMNH’01”; RMNH .

Description

Female

MEASUREMENTS. Body length 2.6–3.8 mm; fore wing length 1.9–2.4 mm.

HEAD. Head width 1.4–1.5 times its median length, 1.3–1.4 times width of mesoscutum. Head behind eyes distinctly evenly convex-roundly narrowed; transverse diameter of eye 1.4–1.7 times larger than temple length. Ocelli small, arranged in triangle with base 1.1–1.2 times its sides; POL 1.2–1.7 times Od, 0.4–0.6 times OOL. Eye glabrous, weakly emarginated opposite antennal sockets, 1.2–1.3 times as high as broad. Malar space height 0.5–0.6 times height of eye, almost equal to basal width of mandible. Malar suture absent. Face width 1.1–1.2 times height of eye and 1.15–1.20 times height of face and clypeus combined. Upper margin of clypeus situated on or weakly below than lower level of eyes. Hypoclypeal depression round, its width 0.6–0.7 times distance from edge of depression to eye, 0.3–0.4 times width of face. Occipital carina not fused with hypostomal carina below being obliterated for short or very short distance upper base of mandible but connected with it by additional rugae. Vertex weakly convex.

ANTENNA. Antenna long, slender, weakly setiform, 26–33-segmented, about 1.2 times longer than body. Length of scape 1.5–1.7 times its maximum width. First flagellar segment 4.3–4.8 times longer than its apical width, 0.9–1.0 times as long as second segment. Penultimate segment 3.5–3.7 times longer than wide, about 0.7 times as long as first segment, 0.85–0.90 times as long as apical segment; latter acuminate apically.

MESOSOMA. Length 2.1–2.3 times its height. Pronotum anteriorly almost straight (dorsal view), distinctly convex dorsally in posterior half (lateral view). Pronotal carina rather distinct and situated medially. Mesoscutum not highly and gently-roundly elevated above pronotum. Notauli rather deep, wide, complete and sparse crenulate with dense granulation. Mesoscutum without median longitudinal depression. Prescutellar depression rather long, shallow anteriorly and deeper posteriorly, its posterior side laterally straight and oblique, without or with weak median carina, densely and distinctly rugulose and sometimes with additional undulate striae, 0.4 times as long as convex scutellum. Precoxal sulcus distinct, rather deep, crenulate-reticulate, weakly curved, long, running along almost whole length of lower part of mesopleuron. Prepectal carina distinct, weakly widened below, without lobes opposite fore coxae. Metanotum with short or distinct, distally acuminate and basally wide dorsal process (lateral view). Metapleural lobe distinct, rather narrow, rounded distally.

WINGS. Length of fore wing 4.2–4.4 times its maximum width. Radial (marginal) cell not shortened, 4.0–4.5 times longer than maximum width. Metacarpus (1-R1) 1.0–1.1 times as long as pterostigma. Radial vein (r) arising almost from middle of pterostigma. First radial abscissa (r) forming obtuse angle with second abscissa (3-SR). Second radial abscissa (3-SR) 2.8–3.0 times longer than first abscissa (r), 0.45–0.50 times as long as straight third abscissa (SR1), 1.1–1.4 times longer than first radiomedial vein (2-SR). Second radiomedial (submarginal) cell median-sized, not widened distally, its length 2.6–2.9 times maximum width, 1.2–1.4 times longer than rather narrow brachial (subdiscal) cell. First medial abscissa (1-SR+M) sinuate. Recurrent vein (m-cu) postfurcal. Mediocubital vein (M+CU1) rather distinctly curved to anal vein (1-1A) in distal half. Distance from nervulus (cu-a) to basal vein (1-M) 1.1–1.5 times nervulus (cu-a) length. Brachial (subdiscal) cell gently and roundly closed rather distinctly before level of recurrent vein (m-cu); posterior bulla on brachial vein (CU1b) absent; posterior abscissa of anal vein (2-1A) (behind brachial vein (CU1b)) absent. Hind wing not narrowed basally, 5.2–5.8 times longer than wide. First costal abscissa (C+SC+R) 0.5–0.6 times as long as second abscissa (1- SC+R). First abscissa of mediocubital vein (M+CU) 0.35–0.40 times as long as second abscissa (1-M). Recurrent vein (m-cu) short, unsclerotized, antefurcal, oblique, straight.

LEGS. Hind femur with rather distinct basodorsal protuberance, its length 3.2–3.4 times maximum width. Hind tarsus 0.9–1.0 times as long as hind tibia. Hind tibia posteriorly with four outside spines. Hind basitarsus about 0.5 times combined length of second-fifth segments. Second tarsal segment 0.55–0.60 times as long as basitarsus, 1.2–1.3 times longer than fifth segment (without pretarsus).

METASOMA. Metasoma 1.2–1.3 times longer than head and mesosoma combined, with five dorsally visible hardly sclerotised tergites. Maximum subposterior width of first tergite 2.2–2.6 times its anterior width; its length 1.2–1.4 times posterior width. Second tergite without anterior area, with long posterior area separated anteriorly by deep and evenly curved crenulate transverse furrow. Median length of posterior area 1.3–1.4 times median length of remaining part of second tergite. Median length of second tergite (with posterior area) 0.9 times its anterior width, 2.6–3.3 times length of third tergite. Second suture deep and evenly curved. Third and fourth tergites without posterior transverse furrow; fourth tergite with crenulate deep anterior transverse furrow. Fifth tergite enlarged, on posterior margin distinctly curved, without processes, tubercles or incisure, without tubercles laterally. Fifth tergite 1.7–1.8 times longer than fourth tergite. Ovipositor sheath 0.5–0.6 times as long as metasoma, 0.8–0.9 times longer than mesosoma, 0.4 times as long as fore wing.

SCULPTURE AND PUBESCENCE. Vertex entirely densely undulately-curvedly transversely striate with dense reticulation between striae; frons distinctly reticulate-striate; temple mainly subvertical or oblique undulately striate with reticulation, finely coriaceous to smooth in lower quarter to third. Face densely reticulate-granulate or reticulate-rugulose in upper half or two-thirds, almost smooth to smooth in rather narrow medial vertical area and laterally in lower half to third. Mesoscutum densely granulate-reticulate situated in dense transverse curved lines, with rugosity along notauli, with rugosity in narrow area in medioposterior third. Scutellum densely and rather weakly granulate-reticulate. Mesopleuron mainly densely reticulate-coriaceous, finely and densely granulate to coriaceous below precoxal sulcus. Propodeum without delineated areas, with weakly and sometimes incompletely delineated long basolateral areas; areola absent; basolateral areas sometimes smooth or almost smooth anteriorly, mainly or sometimes entirely rugose-reticulate with fine striation; remaining part of propodeum rugose-striate or rugose-reticulate. Hind coxa densely rugulose-areolate dorsally, reticulate-coriaceous laterally, almost smooth ventrally; hind femur mainly reticulate-coriaceous, almost smooth below. First tergite with distinctly and weakly narrowed complete dorsal carinae. First to fifth tergites coarsely, densely and at least partly curvedly or divergently striate, with distinct and dense rugulosity between striae; striae on posterior half of fifth tergite distinctly curved and without rugosity between striae. Second–fifth tergites laterally with distinct dense striae and rugosity between it. Vertex with short and rather sparse semi-erect white setae directed forwards. Mesoscutum mainly with rather sparse and semi-erect white setae, its medial lobe on medial part glabrous. Metasoma dorsally partly with short and sparse semi-erect white setae. Hind tibia dorsally with semi-erect and rather dense short pale setae, length of these setae 0.6–0.8 times maximum width of hind tibia.

COLOUR. Head mainly yellowish brown, reddish brown dorsally; mesosoma and metasoma dark reddish brown or reddish brown, but sometimes dark reddish brown, metasoma below mainly pale brown or almost yellow. Scape and pedicel of antenna light reddish brown to reddish brown, most basal part of flagellum yellow to yellowish brown, remaining short apical part of flagellum sometimes becoming brownish. Palpi yellow. Legs mainly yellow, hind coxa distinctly infuscate. Ovipositor sheath brown. Fore wing faintly infuscate. Pterostigma brownish yellow in basal half, brown in apical half.

Male

Body length 2.3–2.7 mm; fore wing length 1.6–2.1 mm. Antenna 23–26-segmented; scape wide, its length 1.4 times maximum width. Metasoma 1.1–1.4 times longer than head and mesosoma combined, with six dorsally visible sclerotised tergites; sixth tergite finely reticulate-rugulose and almost smooth in posterior fifth. Median length of second tergite (with posterior area) 1.1 times its anterior width; median length of its posterior area 0.9–1.0 times median length of remaining part of tergite. Fifth tergite on posterior margin almost straight, 1.0–1.2 times as long as sixth tergite, 1.1–1.2 times longer than fourth tergite. Face widely smooth, rugose-reticulate in upper sublateral third.

Distribution

Yemen.

Figures

Fig. 51. Rhaconotus (Rh.) magniareolus Belokobylskij sp. nov., holotype, ♀ (RMNH). A. Habitus, lateral view. B. Head, dorsal view. C. Head, front view. D. Head, lateral view. E. Basal segments of antenna. F. Apical segments of antenna. G. Mesosoma, dorsal view. H. Mesosoma, lateral view. I. Hind leg.

Fig. 52. Rhaconotus (Rh.) magniareolus Belokobylskij sp. nov., holotype, ♀ (RMNH). A. Wings. B. Metasoma, dorsal view. C. Metasoma, lateral view.