Chremylus pomonellae (Atanasov) Belokobylskij & Kula, 2012

Belokobylskij, Sergey A. & Kula, Robert R., 2012, Review of the brachypterous, micropterous, and apterous Braconidae of the cyclostome lineage (Hymenoptera: Ichneumonoidea) from the Palearctic Region 3240, Zootaxa 3240 (1), pp. 1-62 : 15-19

Chremylus pomonellae (Atanasov) , comb. n.

( Figs 11–23 , 116 )

Rhysallus pomonellae Atanasov, 1996: 5 [original description].

Examined material. Bulgaria: 4 females and 1 male (paratypes; brachypterous) , 3 females (paratypes; macropterous) “Bulgaria: Plovdiv Dist., env. of Rogosh village , coll. 5.VI.1990, reared 18-20.VIII.1990, A. Atanasov ”, “Host: Larva of Cydia (Laspeyresia) pomonella (L.) ( Tortricidae )” ( ZISP) .

Description of brachypterous form. Female. Body length 2.20–2.30 mm.

Head (dorsal view) 1.45–1.55 times as wide as median length, 1.40 times as wide as mesosoma at level of tegulae. Head behind eyes distinctly, regularly, and weakly roundly narrowed. Transverse diameter of eye 2.00–2.30 times longer than temple (dorsal view). Ocelli in triangle with base 1.10–1.30 times sides. POL 1.50–2.00 times Od, 0.70– 0.85 times OOL. Antennal sockets situated close to each other, diameter of socket 1.70–2.00 times distance between sockets, 0.70–1.30 times distance between socket and eye. Eye with very short and sparse setae, without emargination opposite antennal socket, 1.20 times as high as broad. Malar space 0.50–0.55 times as high as eye, 1.20–1.40 times as high as basal width of mandible. Malar suture absent. Face convex, width 1.00–1.10 times eye height and 1.20–1.30 times height of face and clypeus combined. Width of hypoclypeal depression 0.70–0.80 times distance from depression to eye, 0.40–0.45 times width of face. Occipital carina coarse, complete dorsally, joined ventrally with hypostomal carina above base of mandible. Hypostomal flange rather wide. Mandible rather thick. Head below eyes distinctly and roundly narrowed (frontal view). Maxillary palpi long and with 6 palpomeres, labial palpi short and with 4 palpomeres.

Antenna rather slender, filiform, with 17 flagellomeres, 0.80 times as long as body. Scape with excavation in apical and outer margin, 1.60–1.80 times longer than maximum width. First flagellomere 3.20–3.50 times longer than apical width, almost as long as second flagellomere. Penultimate flagellomere 2.00–2.30 times longer than wide, 0.55 times as long as first flagellomere, 0.80–0.85 times as long as apical flagellomere; the latter obtuse apically and without spine.

Mesosoma weakly reduced in size, length 1.80–2.00 times maximum height. Pronotum rather long, anterior margin almost straight or weakly convex (dorsal view), pronotal keel rather distinct and situated submedially. Mesoscutum weakly and roundly elevated above pronotum, 0.70 times as long as wide. Notauli very shallow, rather narrow, complete, weakly granulate with sparse and fine crenulation. Prescutellar depression relatively deep, short, with four to five wrinkles, finely or very finely granulate. Scutellum separated, with distinct lateral carinae. Subalar depression shallow and densely granulate with crenulation on narrow area. Mesopleuron without oblique submedian furrow. Precoxal suture present, rather distinct, sparsely and distinctly crenulate, running along anterior 0.50–0.60 of lower part of mesopleuron; additional shallow and narrow furrow covered by coarse sublongitudinal or oblique striae situated between end of precoxal suture and middle coxa. Prepectal carina distinct. Postpectal carina at least partly present. Metapleural lower lobe short, wide basally and narrow toward apex, rounded apically. Propodeum regularly convex- roundly narrowed posteriorly (lateral view), with distinct, wide, flat, apically rounded lateral processes in posterior 0.25. In dorsal view, mesonotum about 5.00 times longer than pronotum, 1.40–1.60 times longer than propodeum. Tegulae present.

Wings. Size of wings distinctly reduced, narrow, rounded apically, reaching almost middle of metasoma. Medial, submedial, discoidal, and usually brachial cells of fore wing closed. Pterostigma present but small. Radial vein present closing radial cell. Sometimes both radiomedial veins present and small second radiomedial cell delineated by distinct veins. Parallel vein interstitial. Nervulus distinctly antefurcal. In hind wing, medial and submedial cells closed by veins.

Legs. Fore tibia without spines. Femora rather slender, without dorsal protuberance. Hind femur weakly curved in basal 0.30, 3.70–4.20 times longer than maximum width. Hind tarsus 0.75–0.85 times as long as hind tibia. Hind tibia weakly widened posteriorly. Hind basitarsus 0.60–0.65 times as long as second through fifth tarsomeres combined. Second tarsomere of hind tarsus 0.45–0.55 times as long as basitarsus, 1.25–1.45 times longer than fifth tarsomere (without pretarsus). Claws weakly curved.

Metasoma 1.40–1.50 times longer than maximum width, 0.85–0.90 times as long as head and mesosoma combined. First tergum distinctly widened toward apex, with weakly convex and rather narrow median area, with dorsal carinae not widely separated and weakly convergent posteriorly; length of tergum 0.70–0.80 times apical width, almost equal to length of propodeum; apical width of tergum 2.10–2.30 times basal width. Groove between second and third terga present, but shallow and weakly curved. Median length of second tergum 0.65–0.70 times as long as basal width, 1.80–2.00 times length of third tergum. Median length of second and third terga combined 1.10 times basal width of second tergum, 0.75–0.80 times maximum width. Apical terga rather shortly protruding behind third tergum. Ovipositor straight, rather slender, sheath 0.50–0.70 times as long as hind tibia, 0.40–0.50 times as long as metasoma, 0.50–0.60 times as long as mesosoma.

Sculpture and pubescence. Vertex very densely and distinctly granulate, frons densely granulate, with fine or distinct rugulosity at least laterally or entirely; face almost entirely and distinctly densely granulate, partly with fine areolation; temple entirely distinctly and densely granulate. Mesoscutum distinctly and densely granulate, with rugosity medioposteriorly. Scutellum densely granulate. Mesopleuron finely granulate-coriaceous, almost smooth medially. Propodeum almost entirely rugose-strigate, with transverse strigation in posterior half, with fine additional granulation anteriorly; areas distinctly delineated; areola long, narrow, elongate-oval, connected anteriorly with base of propodeum, 2.50–3.30 times longer than wide; petiolate area narrow, long, distinctly separated. Hind coxa in dorsal half at least partly or entirely rugulose or rugose, smooth in lower half. Hind femur entirely and densely granulate, partly or entirely with rugulosity. First tergum entirely distinctly and densely carinate, without additional microsculpture. Second tergum smooth. Terga posterior to second tergum entirely smooth. Vertex entirely with rather dense, short, and semi-erect pale setae. Mesonotum with dense, short, and semi-erect pale setae spaced rather narrowly along notauli and laterally. Fourth through sixth metasomal terga with single row of short semi-erect setae. Hind tibia dorsally with dense, short or very short, and semi-erect setae, length of those setae 0.25–0.30 times as long as maximum width of hind tibia.

Color. Body brownish yellow except head slightly darker, metasoma behind first tergum yellowish, but dark brown apically. Basal 0.70 of antenna yellow, rest of antenna yellowish brown or brown. Palpi yellow. Legs brownish yellow. Ovipositor sheath brown, dark brown apically.

Male. Body length 1.80 mm. Head (dorsal view) 1.40 times as wide as median length. Transverse diameter of eye 2.00 times longer than temple (dorsal view). Diameter of antennal socket 3.00 times distance between sockets. Malar space 1.10 times as high as basal width of mandible. Width of hypoclypeal depression 0.90 times distance from depression to eye. Head below eyes strongly and convex-roundly narrowed (frontal view). Vertex and frons finely granulate and partly with rugulosity; face narrow medially almost smooth. Basal segment of maxillary palpus very strongly enlarged. Scape 1.50 times longer than wide. Mesosoma length 1.70 times height. Mesoscutum 0.75 times as long as wide. Precoxal suture shallow. Mesoscutum with fine rugosity in narrow medioposterior area. Mesopleuron finely rugulose along margins, widely smooth medially. In dorsal view, mesonotum 4.20 times longer than pronotum, 2.00 times longer than propodeum. Size of wings strongly reduced, reaching end of propodeum, only with medial and submedial cells. Hind femur 3.60 times longer than maximum width. First tergum with indistinct median area, dorsal carinae distinct only basally; length of tergum 0.85 times apical width, 1.20 times length of propodeum. Groove between second and third terga very fine. Median length of second tergum 1.60 times length of third tergum. Median length of second and third terga combined 1.15 times basal width of second tergum, 0.70 times maximum width. Body yellow except metasoma brownish yellow. Otherwise similar to female.

Description of macropterous form. Female. Body length 2.30 mm; fore wing length 1.70 mm.

Head (dorsal view) 1.40 times as wide as median length, 1.30 times as wide as mesosoma at level of tegulae. POL 0.70 times OOL. Eye with very weak emargination opposite antennal socket.

Mesosoma. Mesoscutum 0.80 times as long as wide. In dorsal view, mesonotum 5.50–6.00 times longer than pronotum, 1.80–2.00 times longer than propodeum.

Wings. Length of fore wing 3.10–3.20 times maximum width. Radial cell weakly shortened; metacarp almost as long as pterostigma. Pterostigma narrow, 5.00–5.50 times longer than maximum width. Radial vein arising behind middle of pterostigma. First radial abscissa forming obtuse angle with second abscissa, 1.20–1.60 times longer than maximum width of pterostigma. Second radial abscissa 1.50–2.00 times longer than first abscissa, 0.45–0.50 times as long as weakly curved third abscissa, 1.10 times longer than first radiomedial vein. Second radiomedial cell short, weakly narrowed distally, 2.20–2.30 times longer than wide, 1.10 times longer than brachial cell. First medial abscissa very weakly sinuate. Recurrent vein more or less postfurcal. Mediocubital vein not curved to anal vein. Nervulus interstitial to basal vein, sometimes weakly postfurcal. Brachial cell gradually and evenly closed before recurrent vein; posterior abscissa of anal vein (behind brachial vein) present but unsclerotized. Parallel vein interstitial. Hind wing 3.80–4.00 times longer than maximum width. First costal abscissa 0.50–0.60 times as long as second abscissa. First abscissa of mediocubital vein 0.65–0.70 times as long as second abscissa. Recurrent vein present, very strongly desclerotized, weakly curved, weakly antefurcal.

Legs. Hind femur 4.40–4.50 times longer than maximum width. Hind tarsus 0.90 times as long as hind tibia.

Metasoma 0.80 times as long as head and mesosoma combined. First tergum with wide median area; apical width of tergum 2.50–2.60 times basal width. Median length of second and third terga combined 1.20–1.30 times basal width of second tergum. Apical terga shortly protruding behind third tergum. Ovipositor weakly downcurved, sheath 0.25–0.30 times as long as fore wing.

Sculpture and pubescence. Frons entirely densely and more or less distinctly rugose-areolate or rugose-strigate and with fine granulation. Scutellum densely and finely areolate-coriaceous. Mesopleuron finely areolate-coriaceous, almost smooth medially. Propodeum widely rugose-strigate, with transverse strigation in posterior half and with granulation anteriorly; areola 2.00–2.40 times longer than wide.

Color. Metasoma dark brown or dark reddish brown in apical 0.30. Basal half of antenna yellow, apical half light brown or light reddish brown. Palpi pale yellow. Hind femur light reddish brown. Ovipositor sheath pale brown, brown or faintly darkened apically.

Other characters are as in brachypterous form.

Diagnosis. This species, described originally in Rhyssalus ( Atanasov 1996) , is transferred to Chremylus based on examination of several paratypes (both brachypterous and macropterous forms). Besides the characters listed for brachypterous C. planispinus , the macropterous form has wing venation similar to C. elaphus . Chremylus pomonellae is very similar to C. planispinus but differs as follows: mesosoma dorsally wide, face narrow (1.20–1.30 times height of face and clypeus combined), prescutellar depression with strong and numerous wrinkles, mesopleuron without oblique submedian furrow, postero-lateral propodeal processes short and rounded apically, hind femur wide, first tergum wide apically, second tergum smooth basally, and wing much longer.

Distribution. Bulgaria ( Atanasov 1996).

Figures

FIGURES 11–21. Chremylus pomonellae (Atanasov), female (11-16, 18-21) and male (17); brachypterous form. 11. Head, front view. 12. Head, dorsal view. 13. Head, lateral view. 14. Basal and apical segments of antenna. 15. Mesosoma, lateral view. 16. Mesosoma, dorsal view. 17. Head and basal segment of maxillary palps, lateral view. 18. Fore wing. 19. Hind wing. 20. Hind femur, lateral view. 21. Metasoma, dorsal view.

FIGURES 22–23. Chremylus pomonellae (Atanasov), female, macropterous form. 22. Fore wing. 23. Hind wing.

FIGURES 108–116. Habitus photos of brachypterous, micropterous, and apterous cyclostome braconids (108–111, 115–116 [dorsal view]; 112–114 [lateral view]). 108–109. Achaiabracon aenigmatus Belokobylskij (108 – female, holotype; 109 – male, paratype). 110. Heterospilus hemipterus (Thomson) (male). 111. Nipponecphylus matsumurai Belokobylskij & Konishi (male, paratype). 112. Rhaconotus hispanicus Belokobylskij (female, holotype). 113. Spathius maderi Fahringer (female). 114. Spathius pedestris Wesmael (female). 115. Chremylus algecirasus sp. n. (female, holotype). 116. Chremylus pomonellae (Atanasov) (female, paratype).