Hecabolus chrisaxeli, Castañeda-Osorio & Belokobylskij & Zaldívar-Riverón, 2022

Castañeda-Osorio, Rubén, Belokobylskij, Sergey A. & Zaldívar-Riverón, Alejandro, 2022, Four new species of Hecabolus Curtis, 1834 (Braconidae, Doryctinae) from south and southwestern Brazil, with notes on the morphological variation and geographic distribution of H. mexicanus ZaldívarRiverón & Belokobylskij, 2009, European Journal of Taxonomy 846, pp. 126-151 : 133-136

Hecabolus chrisaxeli sp. nov.

urn:lsid:zoobank.org:act:435E2C4D-E1BE-4740-B41C-152570AE1C11

Fig. 2

Diagnosis

Hecabolus chrisaxeli sp. nov. is morphologically similar to H. costaricensis by having mesoscutal lobes coriaceous, forewing with wide pterostigma, and mesopleuron almost entirely smooth, longitudinally striate on posterior third. It can be morphologically distinguished from the remaining species of Hecabolus by having the second metasomal tergite with two distinctively striate subparallel anterior depressions (without subparallel anterior depressions in the remaining species); hindwing with r-m very short (medium in the remaining species), and veins RS and cu-a weakly defined, almost spectral (absent in the remaining species).

Etymology

The specific epithet of this species is dedicated to the first author’s life partner.

Material examined

Holotype BRAZIL • ♀; Nova Teutonia ; 9 Nov. 1941; F. Plaumann leg.; B.M. 1957–341; DNA voucher no. CNIN4369; NHMUK.

Paratypes BRAZIL • 1 ♀; same collection data as for holotype; 3 Apr. 1941; NHMUK • 1 ♀; same collection data as for holotype; 9 Apr. 1941; NHMUK • 1 ♀; same collection data as for holotype; 10 Apr. 1941; CNINIBUNAM • 2 ♀♀; same collection data as for holotype; 12 Apr. 1941; CNIN-IBUNAM .

Description

Female

MEASUREMENTS. Body length 3.6–4.3 mm; fore wing length 2.2–2.9 mm; ovipositor length 3.1–4.2 mm.

HEAD ( Fig. 2B ). Width 1.4–1.6 × median length (dorsal view), 1.4 × width of mesoscutum. Head behind eyes (dorsal view) convex in anterior half, and weakly, roundly narrowed in posterior half. Transverse diameter of eye 0.9–1.0 × as long as temple. Ocelli rather small, arranged in an equilateral triangle; POL 0.1 × Od, 0.5–0.6 × OOL. Eyes glabrous, with a distinct emargination opposite antennal sockets, 1.1–1.2 × as high as broad. Malar space 0.5–0.6 × height of eye, 1.0–1.1 × basal width of mandible. Face convex, its width 1.4–1.5 × height of eye and 1.1–1.2 × height of face and clypeus combined. Malar suture absent. Clypeus high, with a distinct lower flange. Hypoclypeal depression small and elliptical, 0.3–0.4 × as long as wide. Occipital carina wide, complete, ventrally joined with hypostomal carina. Hypostomal flange wide. Antennae with 16 flagellomeres. Scapus 2.5 × as long as its maximum width. First flagellomere slightly curved, slightly widened medially, 2.5 as long as its maximum width; 0.9–1.0 × as long as second flagellomere; the last flagellomere pointed apically.

MESOSOMA ( Fig. 2C–D ). Length of mesosoma 2.1–2.2 × its height. Pronotum short, dorsally weakly convex, without distinct submedian pronotal carina. Mesoscutum (lateral view) highly and roundly elevated above pronotum; its length (dorsal view) 2.5 × maximum width. Median lobe of mesoscutum shortly protruding forward, without anterolateral corners. Notauli wide, shallow, scrobiculate anteriorly and striate posteriorly. Prescutellar depression rather shallow, long, with 7–8 carinae, 0.4 × as long as scutellum. Scutellum weakly convex and with fine lateral carinae. Precoxal sulcus distinct, rather shallow, distinctly crenulate anteriorly and striate posteriorly, running along 0.6–0.7 of lower length of mesopleuron. Metanotal tooth blunt, almost indistinct. Metapleural lobe long and narrow, rounded apically. Propodeum with very small and blunt lateral tubercles.

WINGS ( Fig. 2E–F ). Fore wing 3.5–3.6 × as long as its maximum width. Pterostigma 3.0 × as long as wide. Vein r arising in the middle of pterostigma. Marginal cell long, its length 2.6–2.7 × maximum width. Vein R1 1.5–1.6 as long as pterostigma. Vein r 0.9–1.0 × as long as maximum width of pterostigma. Vein 3RSa slightly curved towards posterior margin of wing, 5.3–5.4 × as long as vein r, 2.6–2.7 × as long as vein 2RS. Vein 2RS 2.0 × as long as vein r and 3.0 × as long as vein m-cu. Vein m-cu interstitial to vein 2RS. Vein (RS+M)a slightly curved medially. First discal cell long, 2.0–2.5 × as long as wide. Veins 1M and m-cu parallel. Vein cu-a postfurcal to vein 1M. Vein 1M 1.7–1.8 × as long as vein 1RS, 1.8 × as long as vein m-cu. Vein cu-a short and straight, vein 1M 3.5 × cu-a length. Vein M+CU distinctly sinuate. Vein 2CU interstitial to vein 1CU. Hind wing 4.6–4.7 × as long as wide. Vein C+Sc+R 1.6–1.7 × as long as than Sc+R. Vein r-m very short, almost indistinguishable. Basal cell considerably narrow, its length 15.0–16.0 × its maximum width, 0.2–0.3 × length of wing. Vein M+CU 0.8–0.9 × as long as vein 1M. Vein cu-a poorly defined, almost spectral. Vein m-cu unsclerotized, almost straight, weakly oblique toward base of wing. Vein RS poorly defined, almost spectral. Vein 2M unsclerotized, slightly curved anteriorly, almost straight towards apex of wing.

LEGS ( Fig. 2A, C ). Fore tibia with few slender spines arranged in a narrow row. Hind coxa protruding forwards in ventro-anterior corner, 1.5–1.6 × as long as maximum width. Hind femur moderately wide, 2.8 × as long as its maximum width. Hind tibia slightly wide. Hind tarsus 0.9 × as long as hind tibia. Basitarsus about 0.8× as long as second–fifth segments combined. Second segment of hind tarsus 0.3– 0.4 × as long as basitarsus, 1.0–1.1 × as long as fifth segment (without pretarsus).

METASOMA ( Fig. 2G ). Metasoma 1.2–1.3 × as long as head and mesosoma combined. First segment with basal sternal plate moderately long, 0.4–0.5 × as long as first tergite; with distinct dorsope, with small spiracle in basal 0.3. Maximum width of first tergite 3.5 × its minimum width; length equal to its apical width, 1.4–1.6 × length of propodeum. Second tergite with wide and shallow lateral subparallel depressions (furrows) not delineated by carinae. Median length of second tergite 1.3 × its basal width, 1.5–1.6 × length of third tergite. Combined length of second and third tergites 1.1 × their maximum width. Ovipositor sheaths slender, 1.5–1.6 × as long as metasoma, 0.8–0.9 × as long as mesosoma, 1.2–1.3 × as long as body, 1.1–1.2 × as long as fore wing.

SCULPTURE AND PUBESCENCE. Vertex finely striate posteriorly, smooth medially; frons smooth below ocelli, emargination opposite antennal sockets densely rugose. Face entirely, distinctly, and densely rugose; densely striate near malar space below eyes; temple smooth and polished. Sides of pronotum distinctly longitudinally striate in upper half and transversely striate in lower half. Mesoscutum densely and finely coriaceous, lateral lobes finely coriaceous. Scutellum entirely smooth. Mesopleuron almost entirely smooth, longitudinally striate in upper third; precoxal sulcus scrobiculate anteriorly, striate posteriorly. Metapleuron entirely and coarsely reticulate-striate. Propodeum entirely and densely rugose with dense rugulose microsculpture, without areas delineated by carinae. Hind coxae smooth medially, slightly striate dorsally, and slightly rugose ventrally. Hind femur smooth. First metasomal tergite densely and longitudinally striate with rugose microsculpture medially; second metasomal tergite with short lateral subparallel depressions densely and longitudinally striate, its remaining area smooth and polished; remaining metasomal tergites smooth and polished. Vertex with very sparse and short setae; frons with dense long setae. Pronotum and mesosctutum scarcely with long and pale setae, with narrow median glabrous areas on lateral lobes. Mesopleuron, metapleuron and propodeum almost glabrous. Both wings with dense short setae, especially on wing margins. Hind coxae with scarce semi-erect setae. Hind femur with scarce setae. Hind tibia dorsally and laterally with dense setae; tarsus with short and very dense setae. Metasoma glabrous, hypopygium apically with scarce, more or less long pale setae.

COLOUR. Body brown or dark reddish brown, anterior half of metasoma dark reddish brown. Antenna brown to light brown. Palpi light brown or almost yellow. Legs brown or light brown, hind coxa dark, hind tibiae yellowish or pale in basal third. Fore wing infuscate basally, hyaline in apical third; pterostigma dark brown. Hind wing entirely hyaline.

Male

Unknown.

Distribution

The locality of the six specimens, including holotype, is Nova Teutonia in the state of Santa Catarina in southern Brazil.

Hosts

Unknown.

Figures

Fig. 2. Hecabolus chrisaxeli sp. nov., ♀, holotype (NHMUK). A. Habitus, lateral view. B. Head, frontal view. C. Mesosoma, lateral view. D. Mesosoma, dorsal view. E. Fore wing. F. Hind wing. G. Metasoma, dorsal view.