Erythropompilus Shimizu & Pitts, 2021

Shimizu, Akira, Pitts, James P., Yoshimura, Jin & Wahis, Raymond, 2021, New genus and species of Pompilinae spider wasps from the Oriental Region (Hymenoptera, Pompilidae), Journal of Hymenoptera Research 84, pp. 339-359 : 339

publication ID	https://dx.doi.org/10.3897/jhr.84.68810
publication LSID	lsid:zoobank.org:pub:8151D0A4-203F-408A-B6BD-E83A91D3F705
persistent identifier	https://treatment.plazi.org/id/B3CC2B64-1F2E-464C-A2C3-7987989822C7
taxon LSID	lsid:zoobank.org:act:B3CC2B64-1F2E-464C-A2C3-7987989822C7
treatment provided by	Journal of Hymenoptera Research by Pensoft
scientific name	Erythropompilus Shimizu & Pitts
status	gen. nov.

Treatment

Erythropompilus Shimizu & Pitts gen. nov.

Type species.

Erythropompilus malaysiensis Pitts & Shimizu, sp. nov. (here designated).

Diagnosis.

This genus differs from other genera of the subfamily Pompilinae by the following combination of features: Both sexes: setae on body sparse; clypeus small, as broad as or slightly narrower than LID (Figs 1A View Figure 1 - 6A View Figure 6 ); labrum well exposed beneath clypeus; ocelli forming obtuse-angled triangle (Figs 1B View Figure 1 - 6B View Figure 6 ); outer orbit sharply grooved (Fig. 1C View Figure 1 ); uppermost portion of occipital carina situated slightly below vertex crest (Fig. 1D View Figure 1 ); propodeum, in dorsal view, parallel-sided at anterior half, strongly narrowing at posterior half, dorsum reticulately rugose with a pair of subparallel longitudinal carinae medially, and declivity slightly pointed posterolaterally (Figs 1E View Figure 1 , 3C View Figure 3 , 5C View Figure 5 ); mid and hind tibial spurs ivory-white (Figs 1F View Figure 1 , 2C View Figure 2 , 3D View Figure 3 , 4C View Figure 4 , 5D View Figure 5 , 6C View Figure 6 ); tarsomere 5 of all legs without ventral spines; all tarsal claws bifid (Figs 1G View Figure 1 , 3E View Figure 3 ); orbicula small (Fig. 1G View Figure 1 ); FW with two dark fasciae (Figs 1H View Figure 1 , 2D View Figure 2 , 3F View Figure 3 , 4D View Figure 4 , 5E View Figure 5 , 6D View Figure 6 ); crossvein 2m-cu meeting vein CuA1 more than half-way out on latter; Male: flagellomeres with placoid sensilla (median elliptic depressed area clothed with silvery minute setae anteroventrally) (Figs 2E View Figure 2 , 4E View Figure 4 , 6E View Figure 6 ); fore tarsal claws asymmetrical due to modification of inner claw (outer ray slender and strongly curved; inner ray long, much stouter than outer ray, rounded at apex); S6 with lateral hook large and rod-like, directed medially (Figs 2F View Figure 2 , 4F View Figure 4 , 6F View Figure 6 ); exposed portion of SGP thin, flattened or concave ventrally, triangular or long and parallel-sided with lateral margin edged (Figs 2F View Figure 2 , 4F View Figure 4 , 6G View Figure 6 ); genitalia with paramere very short, peg-like (Figs 2G, H View Figure 2 , 4G, H View Figure 4 , 6H, I View Figure 6 ); parapenial lobe very broad and sinuate, pointed at apex; and aedoeagus broad, parallel-sided for most part.

Of these features, the very sharply grooved outer orbit in both sexes, placoid sensilla on the flagellomeres, a pair of large, medially directed lateral hooks on S6, the very short, peg-like paramere, and the very broad and sinuate parapenial lobe in the male are unique to this genus. Our preliminary phylogenomics strongly support the close relationship of the genus with Tachypompilus Ashmead, 1902 and Ctenagenia Saussure, 1892.

Description.

Female. Greater part of body and legs with silvery-white pubescence densely. Vertex along inner orbit, labrum, and fore coxa posterobasally with sparse fine setae; S2-S6 with short erect setae, those on S6 dense.

Clypeus slightly convex with lateral margin strongly slanted, apicolateral corner broadly rounded (Figs 1A View Figure 1 , 3A View Figure 3 , 5A View Figure 5 ); apical margin without depressed rim. Mandible short and not stout with inner tooth large and rounded apically (Fig. 1I View Figure 1 ). Maxilla: exogalea 1 completely separated from exogalea 2 (Fig. 5F View Figure 5 ); last three palpomeres longer and thinner than third (Fig. 1J View Figure 1 , 5G View Figure 5 ). Labium: prementum with preapical oval membranous area (Figs 1J View Figure 1 , 5G View Figure 5 , arrows); last palpomere longer than other palpomeres. Malar space very short and practically linear. Inner orbits emarginate above middle, convergent above and below (Figs 1A View Figure 1 , 3A View Figure 3 , 5A View Figure 5 ). Gena, in profile, thin, gradually narrowing above (Figs 1K View Figure 1 , 3G View Figure 3 , 5H View Figure 5 ).

Pronotum with dorsum steeply sloping anteriorly, merging into declivity, latter being short and almost vertical (Figs 1K View Figure 1 , 3G View Figure 3 , 5H View Figure 5 ). Mesoscutum rather flattened except anteriorly, with parapsidal lines very fine and slightly divergent anteriorly. Disc of metanotum declivous. Metapostnotum very short or invaginated medially (Figs 1E View Figure 1 , 3C View Figure 3 , 5C View Figure 5 ). Propodeum, in profile, gently convex (Figs 1K View Figure 1 , 3G View Figure 3 , 5H View Figure 5 ); dorsum merging into declivity; declivity shorter than dorsum, rather flattened, with short, appressed, silvery dense pubescence (Figs 1E View Figure 1 , 3C View Figure 3 , 5C View Figure 5 ).

Fore tibia with several short spines internally. Fore tibial spur pale yellow. Fore tarsus lacking tarsal comb, without spines interiorly and exteriorly (Fig. 1G View Figure 1 ). Dorsal faces of mid and hind tibiae with several spines in exterior and interior rows (Figs 3H View Figure 3 , 5I View Figure 5 ). Hind tibia with apical spines of unequal length and thickness, more or less splayed out and irregularly spaced, lacking integumental serrations dorsally. Orbicular pecten comprising about seven long divergent fine setae (Fig. 1G View Figure 1 ). Tarsal claws with inner ray much broader than outer ray, obliquely truncate (Fig. 3E View Figure 3 ). Longest seta of orbicular pecten much longer than orbicula itself (Fig. 1G View Figure 1 ).

FW inner fascia broad on both sides of second abscissae of veins Rs and M (basal vein) and crossvein cu-a (Figs 1H View Figure 1 , 3F View Figure 3 , 5E View Figure 5 ); outer fascia occupying basal half of marginal, SMCs 2 and 3, apical half of discal cell 2, and basal fourth to third of discal cell 3; outer wing margin infuscate; area between outer fascia and outer infuscate margin somewhat whitish. Pterostigma long, its base being much longer than crossvein 2r-rs. SMC2 shorter than SMC3 on vein M, longer than SMC3 on vein Rs. Crossvein 2rs-m nearly straight, oblique to vein M. Crossveins 3rs-m and 2m-cu curved outward. Vein Cu-A1 slightly deflected posteriorly at its base. Crossvein cu-a at or slightly distal to separation of vein M+CuA. A cluster of basal hamuli strongly proximal to separation of vein C from vein Sc+R+Rs. HW crossvein cu-a originating much basal to fork of vein M+CuA, forming angle with vein A, short and gently curved (Figs 1H View Figure 1 , 3F View Figure 3 , 5E View Figure 5 ). Jugal lobe small and elliptic, about third of subbasal cell in length.

S2 without transverse groove or depression. S6 not compressed laterally without median carina.

Male. Antenna much longer than head and mesosoma combined (Figs 2C View Figure 2 , 4C View Figure 4 , 6C View Figure 6 ), with placoids on each flagellomere (Figs 2E View Figure 2 , 4E View Figure 4 , 6E View Figure 6 ). Inner margin of fore tarsomere 5 not produced internally. S6 with inverted-V-shaped emargination posteriorly (Figs 2F View Figure 2 , 6F View Figure 6 ); with pair of large, medially directed lateral hooks. Genitalia with very short, peg-like parameres, and with very broad and sinuate parapenial lobes (Figs 2G, H View Figure 2 , 4G, H View Figure 4 , 6H, I View Figure 6 ). Otherwise similar to female.