Maaserphus bunun Abe, 2024

Abe, Junta, 2024, Two new species of the genus Maaserphus Lin, 1988 (Hymenoptera: Proctotrupidae) from Japan and Taiwan, Zootaxa 5523 (4), pp. 494-500 : 497-498

Maaserphus bunun Abe sp. nov. ( Figs 13–19 )

Diagnosis. Length of face 1.17 times as long as middle inner distance between compound eyes; ventral margin of clypeus with wrinkles ( Fig. 14 ). Anterior part of scrobe wrinkled; carina on antero-dorsal part of lateral pronotal area short and weak; pronotal corner with one pit; posterior margin of mesopleural horizontal groove without oblique wrinkles ( Fig. 15 ); mesopleural suture foveolate completely; mesodiscrimen strongly foveolate completely ( Fig. 16 ); postero-ventral part of metapleural smooth area with hairs ( Fig. 17 ); longitudinal carina of posterior part of propodeum incomplete, transverse carina absent ( Fig. 18 ). Ovipositor sheath hooked ( Fig. 19 ), 0.54 times as long as hind tibia, 9.18 times as long as its maximum width.

Description. Female. Body 7.3 mm ( Fig. 13 ). Color. Flagellum black-brown; body and apical part of mandible black; scape, pedicel, and leg yellow-brown.

Antenna. Length to width of F9–F11 as follows: 1.6: 1; 1.49: 1; 2.12: 1.

Head. Length of face 1.17 times as long as inner minimum distance between compound eyes ( Fig. 14 ); upper part of gena 0.46 times as wide as compound eye laterally; compound eye with sparse hairs, 2.3 times as long as diameter of ommatidium. POL: OOL=0.75: 1. Clypeus sparsely punctate; ventral margin of clypeus with two wrinkles, 0.68 times as long as inner distance of compound eyes ( Fig. 14 ); labrum punctate; mandible without inner teeth, basally punctate, medially costate, apically smooth; diameter of antennal socket 0.2 times as long as inner distance of compound eyes, inner margin of antennal socket with some wrinkles; small projection between antennal socket present. Occipital carina sculptured dorso-laterally.

Mesosoma. Ventral part of propleuron densely punctate, with hairs; pronotal neck with longitudinal wrinkles; area between pronotal shoulders smooth; dorso-lateral margin of pronotum punctuate, with hairs, carina on antero-dorsal part of lateral pronotal area short and weak; lateral margin of pronotal shoulder developed, postero-dorsal part of pronotal shoulder weakly rugose; dorsal half of scrobe wrinkled; pronotal groove with fine wrinkles, posterior margin with depressions; epomia separated from pronotal shoulder, weakly foveolate antero-dorsally ( Fig. 15 ). Dorsal and ventral part of mesopleuron with hairs, postero-dorsal corner with wrinkles; mesopleural hair band incomplete, antero-dorsal margin of mesopleuron smooth; horizontal groove curved, weakly wrinkled, anterior margin with a lobe, posterior margin without some oblique wrinkles ( Fig. 15 ); mesodiscrimen strongly foveolate, with a deep pit anteriorly ( Fig. 16 ); mesoscutum covered with hairs; notaular ridge antero-lateral to notaulus present; notaulus short, 1.12 times as long as length of tegula; prescutellar groove (scutellar fovea) smooth; scutellum with sparse hairs, 1.09 times as long as its width; posterior margin of scutellum foveolate; postscutellum with four longitudinal carinae. Metapleural carina present; groove on metapleural smooth area almost complete, postero-ventral part of metapleural smooth area with hairs; epicoxial carina incomplete ( Fig. 16 ). Anterior margin of propodeal smooth area with hairs; smooth area on dorsal part of propodeum with longitudinal median carina, random short carinae present around longitudinal median carina; longitudinal carina on posterior part of propodeum incomplete, transverse carina absent ( Fig. 18 ); propodeal spiracle opening oval, 2.95 times as long as wide.

Wing. Fore wing 5.2 mm. Costal part of radial cell (R1) 1.28 times as wide as stigma; intercubitus (Rs+M) almost distinct.

Leg. Middle tibia with two spurs apically, longer spur 1.2 times as long as shorter one; hind tibia with two spurs apically, longer spur 1.4 times as long as shorter one.

Metasoma. Base of syntergite developed, without multiple grooves; longitudinal median groove 1.24 times as long as antero-dorsal margin of syntergite; ovipositor sheath hooked, 0.54 times as long as hind tibia, 9.18 times as long as its maximum width, humped basally ( Fig. 19 ).

Male. Unknown.

Specimen examined. Holotype. Female, “Tattaka, 2 V ’29, K. Sato, Tei Ishii Collection” ( NARO).

Host. Unknown.

Distribution. Oriental region: Taiwan.

Etymology. The specific epithet is derived from the name of traditional ethnic group known as “Bunun people”, who live in the type locality.

Remarks. The type locality ‘Tattaka’ refers to the area around Ren’ai Township, Nantou Country, Taiwan. This species was identified as part of the M. basalis group based on the following morphological characters: median groove on antero-dorsal part of syntergite long; ovipositor sheath without long hairs ventrally. Compared to another species in the M. basalis group, this species has a completely foveolate mesopleural suture (foveolate only in dorsal half in M. basalis species group).

Figures

FIGURES 13–19. Maaserphus bunun Abe sp. nov. from Taiwan, female (holotype). 13, lateral habitus; 14, face, arrow indicate small projection between antennal sockets; 15, lateral part of head, pronotum and mesopleuron, arrow indicate depressions on posterior margin of pronotal groove; 16, ventral part of mesothorax; 17, lateral part of metapleuron; 18, postero-dorsal part of propodeum; 19, lateral part of ovipositor sheath. Scale bars: 13, 2 mm; 14, 16, 18, and 19, 0.2 mm; 15 and 17, 0.5 mm.