Chremylus planispinus Belokobylskij, 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 : 12-15

Chremylus planispinus Belokobylskij , sp. n.

( Figs 1–10 )

Type material. Holotype: female, France, “ Garrigues de Montpellier , H. Lavagne ”, “ Coll. F. Picard (Coll. Lichtenstein), Mus Paris 1939” ( MNHN) . Paratypes: 1 female, same labels as holotype ( ZISP) ; 2 females, “ Coll. F. Picard (Coll. Lichtenstein), Mus Paris 1939” ( MNHN) ; 1 female, Algeria, “Museum Paris, Algerie, Bone, Coll. O. Sichel 1867”, “ Bone , 8.[18]66” [was determined erroneously as Pambolus mirus (Ruthe) ] ( MNHN) ; 1 female, Algeria, “Museum Paris, Coll. O. Sichel 1867”, “ Bone , Mars 67” ( MNHN) .

Etymology. From Latin “ planus ” (flat) and “ spina ” (thorn) because flat processes are present on the propodeum of this species.

Description. Female. Body length 2.10–2.60 mm.

Head (dorsal view) 1.30–1.50 times as wide as median length, 1.60–1.80 times as wide as mesosoma at level of tegulae. Head behind eyes distinctly, regularly, and weakly rounded or almost linearly narrowed. Transverse diameter of eye 2.30–2.80 times longer than temple (dorsal view). Ocelli in equilateral triangle. POL about 1.50 times Od, 0.50–0.60 times OOL. Antennal sockets situated close to each other, diameter of socket 1.50–2.00 times distance between sockets, 0.60–0.80 times distance between socket and eye. Eye glabrous, with very shallow emargination opposite antennal socket, 1.20–1.30 times as high as broad. Malar space 0.45–0.50 times as high as eye, 1.30–1.40 times as high as basal width of mandible. Trace of malar suture present, but mostly absent. Face distinctly convex, width 1.10–1.15 times eye height and 1.40–1.70 times height of face and clypeus combined. Width of hypoclypeal depression 0.75–0.90 times distance from depression to eye, 0.35–0.40 times width of face. Occipital carina complete dorsally, joined ventrally with hypostomal carina above base of mandible. Hypostomal flange wide. Mandible thick. Head below eyes distinctly and weakly roundly narrowed (frontal view). Palpi short, maxillary palpus with 6 palpomeres, labial palpus with 4 palpomeres.

Antenna rather slender, filiform, with 16–17 flagellomeres, 0.70–0.80 times as long as body. Scape with excavation in apical and outer margin, 1.70–2.00 times longer than maximum width. First flagellomere 3.00–3.50 times longer than apical width, almost as long as second flagellomere. Penultimate flagellomere 2.00–2.50 times longer than wide, 0.70 times as long as first flagellomere, 0.85–1.00 times as long as apical flagellomere; the latter weakly pointed apically and without spine.

Mesosoma more or less reduced in size, length 1.80–1.90 times maximum height. Pronotum rather long, anterior margin weakly convex (dorsal view), pronotal keel distinct and situated submedially. Mesoscutum weakly and roundly elevated above pronotum, 0.70–0.75 times as long as wide. Notauli shallow or very shallow, rather wide, complete, sparsely crenulate. Prescutellar depression relatively deep, long, with three to five wrinkles, finely coriaceous or smooth. Scutellum separated, with distinct lateral carinae. Subalar depression shallow and strigose with granulation. Mesopleuron with shallow oblique submedian furrow. Precoxal suture present, distinct, crenulate, running along anterior 0.70–0.80 of lower part of mesopleuron. Prepectal carina distinct. Postpectal carina absent. Metapleural lower lobe rather long, wide basally and narrow toward apex, rounded apically. Propodeum regularly convex-roundly narrowed posteriorly (lateral view), with distinct, wide, more or less flat, apically subpointed lateral processes in posterior 0.30. In dorsal view, mesonotum 3.00–4.00 times longer than pronotum, 1.40–1.70 times longer than propodeum. Tegulae present.

Wings. Size of wings strongly reduced, narrow, rounded apically, with 2 short marginate veins, without sclerotized areas, protruding shortly behind base of propodeum.

Legs. Fore tibia without spines. Femora rather slender, without dorsal protuberance. Hind femur weakly curved in basal third, 4.30–4.90 times longer than maximum width. Hind tarsus 0.80–0.90 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 0.50–0.55 times as long as basitarsus, 1.50–1.60 times longer than fifth tarsomere (without pretarsus). Claws weakly curved.

Metasoma 1.70–2.00 times longer than maximum width, 1.00–1.20 times longer than head and mesosoma combined. First tergum distinctly widened toward small spiracular tubercles in basal 0.35, then less strongly and weakly roundly widened to apex or entirely more or less regularly widened from subbase to apex; with more or less convex and wide median area, with subparallel and widely separated dorsal carinae; length of tergum 0.85–0.95 times apical width, 1.20–1.40 times length of propodeum; apical width of tergum 2.10–2.40 times minimum basal width. Groove between second and third terga present but very shallow and weakly curved, sometimes almost absent medially. Median length of second tergum 0.70–0.80 times as long as basal width, 1.40–1.50 times length of third tergum. Median length of second and third terga combined 1.20–1.30 times basal width of second tergum, 0.75–0.90 times maximum width. Apical terga usually rather distinctly protruding behind third tergum. Ovipositor straight, rather slender, sheath 0.70–0.80 times as long as hind tibia, 0.40–0.50 times as long as metasoma, 0.60– 0.80 times as long as mesosoma.

Sculpture and pubescence. Vertex very densely and distinctly granulate, sometimes additionally finely transversely strigulate; frons densely granulate-rugulose; face almost entirely and distinctly densely granulate; temple entirely distinctly and densely granulate. Mesoscutum finely and densely granulate, sometimes anteriorly with rugosity, posteriorly almost smooth in narrow area. Scutellum distinctly and densely granulate. Mesopleuron finely coriaceous in upper 0.30–0.50, densely and more or less distinctly granulate in lower part, rarely almost entirely granulate. Propodeum almost entirely areolate-rugulose, with sparse transverse strigosity; with distinctly delineated areas; areola long, pentagonal, connected or almost connected anteriorly with base of propodeum, 1.80–2.20 times longer than wide. Hind coxa mostly smooth, rugose-strigate dorsally. Hind femur almost entirely and rather finely granulate. First tergum entirely distinctly and densely carinate, without additional microsculpture. Second tergum shortly or very shortly and sometimes finely carinate mediobasally, smooth on rest part. Terga posterior to second tergum entirely smooth. Vertex entirely with sparse, short and almost recumbent pale setae. Mesonotum with dense, short, semi-erect pale setae spaced widely along notauli and narrowly laterally. Fourth through sixth metasomal terga with single row of rather long semi-erect setae. Hind tibia dorsally with dense, short, and semierect setae, length of those setae 0.30–0.40 times maximum width of hind tibia.

Color. Body predominantly brownish yellow, metasoma behind first or second tergum reddish brown. Basal 0.50–0.60 of antenna yellowish brown, rest of antenna rather distinctly infuscate. Palpi yellow. Legs brownish yellow. Ovipositor sheath dark brown.

Male. Unknown.

Diagnosis. This new species is very similar morphologically to C. elaphus in the following features: shape of hind femur; fine groove usually present between second and third terga; antennal sockets situated much closer to each other than to eye; granulation on head and mesosoma widely spaced; long areola of propodeum; and presence of flat, wide, and obtuse lateral processes. Chremylus planispinus very distinctly differs from C. elaphus in the following features: malar suture present but fine, scape short and with oblique excavation in apico-lateral side, antennae long and with more flagellomeres, antennal flagellomeres long, temple short and distinctly narrowed just behind eyes (dorsal view), mesosoma long and not high, wing size very strongly reduced, and first metasomal tergum long. Chremylus planispinus is also similar morphologically to Chremylus algecirasus Belokobylskij , n. sp., but they differ from one another as detailed below in the diagnosis for C. algecirasus .

Distribution. Algeria, France.

Figures

FIGURES 1–10. Chremylus planispinus Belokobylskij, sp. n., female. 1. Head, dorsal view. 2. Head, lateral view. 3. Basal and apical segments of antenna. 4. Mesosoma and wings, lateral view. 5. Tooth of propodeum, lateral view. 6. Mesosoma and wings, dorsal view. 7. Hind tibia, lateral view. 8. Hind femur, dorsal view. 9. Metasoma, dorsal view. 10. Hind femur, lateral view.