Hecabolus gavinbroadi, 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 : 137-141

Hecabolus gavinbroadi sp. nov.

urn:lsid:zoobank.org:act:F5EE0C8E-4966-4065-B8AD-A1FE30854430

Figs 3–4

Diagnosis

Hecabolus gavinbroadi sp. nov. is morphologically similar to H. costaricensis and H. transversalis as they have a wide pterostigma; however, it can be distinguished from the latter species by having lateral blunt tubercles on the propodeum (tubercles absent in H. costaricesis and H. transversalis ). Moreover, it can be distinguished from the remaining species of the genus by the combination of its smooth vertex and mesoscutal lobes strongly and densely coriaceous (vertex and mesoscutal lobes smooth in H. semiaridus and H. sulamtogrossensis , vertex partially striate and mesoscutal lobes coriaceous in all the remaining species).

Etymology

This species is named in honour to the principal curator in charge of the insect collection of the Natural History Museum, London, UK, who kindly lent us the entomological material for morphological examination.

Material examined

Holotype BRAZIL • ♀; Mato Grosso, Rio Caraguata; 4 Apr.1953; F. Plaumann leg., B.M. 1957–341; NHMUK.

Paratypes BRAZIL – Mato Grosso • 1 ♀; same collection data as for holotype; Mar. 1953; CNIN-IBUNAM. – Nova Teutonia • 2 ♂♂; 9 Apr. 1941; F. Plaumann leg; B.M.1957–341; NHMUK • 1 ♂; same collection data as for preceding; 10 Apr. 1941; CNIN-IBUNAM .

Description

Female

MEASUREMENTS. Body length 1.8–2.2 mm; fore wing length 1.3–1.4 mm; ovipositor and sheaths length 1.8–2.3 mm.

HEAD ( Fig. 3B ). Head width 1.3–1.4 × median length (dorsal view), 1.2–1.3 × width of mesoscutum. Head behind eyes (dorsal view) convex in anterior half, and weakly, roundly narrowed in posterior half. Transverse diameter of eye 1.2–1.3 × length of temple. Ocelli rather small, arranged in a subequilateral triangle; POL 1.0–1.3 × Od, 0.3–0.4 × OOL. Eyes glabrous, its height 0.6–0.7 × its maximum width. Malar space 1.0–1.1 × height of eye, 0.6–0.7 × basal width of mandible. Face convex, its width 2.0–2.2 × height of eye, and 1.0–1.3 × height of face and clypeus combined. Malar suture absent. Clypeus high, with a distinct lower flange. Hypoclypeal depression small and round, as long as its width. Occipital carina complete, joined with hypostomal carina. Hypostomal flange wide. Antenna with 12–14 flagellomeres. Scapus 2.0–2.2 × as long as its maximum width. First flagellomere slightly curved medially, not widened, 2.2–2.3 × as long as its maximum width; 0.8–0.9 × as long as second flagellomere.

MESOSOMA ( Fig. 3C–D ). Length of mesosoma 2.0–2.3× its height. Pronotum rather short, dorsally convex, without distinct submedian pronotal carina. Mesoscutum (lateral view) highly and roundly elevated above pronotum; its length (dorsal view) 0.7–0.8 × maximum width. Median lobe of mesoscutum protruding forward, without anterolateral corners. Notauli wide, more or less shallow, scrobiculate anteriorly and striate posteriorly. Prescutellar depression moderately shallow, long, with 8 carinae, 1.3–1.4 × as long as scutellum. Scutellum weakly convex and with no lateral carinae. Precoxal sulcus distinct (lateral view), more or less shallow, crenulate anteriorly and rugose posteriorly, incomplete, running along anterior half of lower length of mesopleuron. Metanotal tooth absent. Metapleural lobe relatively short but wide, slightly curved apically. Propodeum with lateral small, blunt tubercles.

WINGS ( Fig. 3E ). Fore wing 3.3–3.5 × as long as its maximum width. Pterostigma wide, 2.5–3.0 × as long as wide. Vein r arising in the middle of pterostigma. Marginal cell long, its length 2.7–3.0 × maximum width. Vein R1 1.1–1.2 × as long as pterostigma. Vein r 0.5–0.6 × maximum width of pterostigma. Vein 3RSa straight, reaching apical margin of wing, 7.5–8.0 × as long as vein r, 2.9–3.2 × as long as vein 2RS. Vein 2RS 2.3–2.8 × as long as vein r, and 2.0–2.8 × as long as vein m-cu. Vein m-cu interstitial to vein 2RS. Vein (RS+M)a slightly curved medially, almost straight. First discal cell considerably short, 1.8– 2.0 × as long as wide. Veins 1M and m-cu divergent posteriorly. Vein cu-a postfurcal to vein 1M. Vein 1M 1.1–1.3 × as long as vein 1RS, 2.0–2.1 × as long as vein m-cu. Vein cu-a rather short and straight, vein 1M 3.3–5.0 × cu-a length. Vein M+CU slightly sinuate. Vein 2CU interstitial to vein 1CU; vein 2M short, not reaching apical margin of wing, 0.5–0.6 × vein 3RS. Hind wing 5.2 × as long as its maximum width. Vein C+Sc+R long, vein SC+R absent. Basal cell long and narrow, its length 5.0 × its maximum width, 0.3–0.4 × length of wing. Vein M+CU and 1M long. Vein cu-a absent. Vein r-m short, 0.2 × length of Vein R. Vein m-cu absent. Vein RS absent. Vein 2M unsclerotized, spectral, slightly curved anteriorly, straight posteriorly, almost reaching the margin of the wing; vein 1A present, considerably short, 0.1 × length of veins M+CU and 1M combined.

LEGS ( Fig. 3A ). Fore tibia with a narrow row of slender spines. Hind coxa protruding forwards in a ventro-anterior corner, 1.2–1.5 × as long as maximum width. Hind femur considerably wide, 2.0 × as long as its maximum width. Hind tibia slightly wide, 1.2–1.3 × length of hind femur. Hind tarsus 1.0 × as long as hind tibia. Basitarsus about 0.4 × as long as second–fifth segments combined. Second segment of hind tarsus 0.6 × length of basitarsus, equal to length of the fifth segment (without pretarsus).

METASOMA ( Fig. 3F ). 0.9–1.0 × as long as head and mesosoma combined. First segment with basal sternal plate distinctly long, 0.5–0.7 × as long as first tergite; with distinct dorsope and laterope. Maximum width of first tergite 2.5–3.0 × its minimum width; length of first tergite 1.0–1.3 × its apical width, 1.0–1.3 × length of propodeum. Second tergite without basal depressions (furrows) nor carinae. Median length of second tergite 0.9–1.0 × its basal width, 1.0–1.1 × length of third tergite. Combined length of second and third tergites 0.9–1.1 × their maximum width. Ovipositor sheaths slender, 2.1–2.3 × as long as metasoma, 2.9–3.0 × as long as mesosoma, 1.0 × as long as the body, 1.4–1.6 × length of the fore wing.

SCULPTURE AND PUBESCENCE. Vertex smooth, sometimes slightly striate posteriorly; frons rugose below ocelli with shallow emargination opposite antennal sockets. Face distinctly, and densely striate near antennal sockets and above clypeus; malar space smooth; temple entirely smooth and polished. Sides of pronotum entirely striate longitudinally; propleuron rugose. Lateral and middle lobes of mesoscutum densely and distinctively coriaceous. Scutellum smooth, scutellar sulcus striate. Mesopleuron almost entirely smooth, longitudinally striate in upper anterior corner; precoxal sulcus scrobiculate anteriorly, striate posteriorly. Metapleuron entirely and coarsely rugose, with a small smooth area anteriorly. Propodeum entirely and densely rugose with dense rugulose microsculpture, with a middle carina. Hind coxae slightly striate dorsally, distinctively striate laterally. Hind femur smooth. First and second metasomal tergites densely and longitudinally striate with rugose microsculpture; third metasomal tergite slightly acinose basally; remaining tergites smooth and polished. Vertex and frons with very scarce and short setae; face with dense setae. Pronotum and mesosctutum with scarce short setae. Mesopleuron, metapleuron and propodeum with scarce setae. Wings with dense short to medium setae, especially on wing margins. Hind coxae with scarce semi-erect setae. Hind femur with sparse setae. Hind tibia dorsally and laterally with dense short setae; tarsus with short and very fine setae. Last tergites with very sparse pale setae.

COLOUR. Head, metasoma and mesosoma brown to dark brown. Antenna brown; scape light brown. Palpi light brown to almost honey yellow. Legs brown; hind coxa light brown to brown; trochanter and trochantellus light brown; hind femur brown; hind tibia brown, its basal quarter yellowish; tarsus light brown, tarsal claw dark brown. Fore and hind wings entirely hyaline, pterostigma brown.

Male

Larger than female ( Fig. 4A ). Body length 2.1–3.0 mm; fore wing length 1.5–2.1 mm. Basal sternal plate of first metasomal segment 0.4–0.5 × as long as first tergite. Hind femur 3.0–4.0 × as long as its maximum width. Fore wing with moderately wide pterostigma, 2.5–3.0 × its maximum width ( Fig. 4E ). Hind wing without stigma-like enlargement, with short r-m, veins RS and m-cu absent; vein 2M not sclerotized, spectral. Both wings with a line of medium-size setae along the margins. Vertex entirely smooth ( Fig. 4D ). Second metasomal tergite striate in anterior two thirds, with irregular striation in posterior third ( Fig. 4F ). Body colour dark brown ( Fig. 4C–D ); antenna brown; all coxae, femora, and tibiae dark brown, trochanters and tarsi brown; tarsal claws brown to dark brown. Forewing hyaline, with an infuscate band in basal half and another infuscate band under pterostigma ( Fig. 4E ).

Distribution

Specimens of this species were recorded from Rio Caraguata in the state of Mato Grosso, and in Nova Teutonia in the state of Santa Catarina, Brazil.

Hosts

Unknown.

Figures

Fig. 3. Hecabolus gavinbroadi sp. nov., ♀, holotype (NHMUK). A. Habitus, lateral view. B. Head, frontal view. C. Mesosoma, lateral view. D. Mesosoma, dorsal view. E. Fore and hind wings, showing the wide pterostigma. F. Metasoma, dorsal view.

Fig. 4. Hecabolus gavinbroadi sp. nov., ♂, paratype (CNIN-IBUNAM). A. Habitus, lateral view. B. Head, frontal view. C. Mesosoma, lateral view. D. Mesosoma, dorsal view. E. Fore wing, showing the moderately wide pterostigma. F. Metasoma, dorsal view.