Erythropompilus venterisetalis Wu & Ma, 2023

Wu, Haiying, Li, Qiang & Ma, Li, 2023, The spider wasp genus Erythropompilus Shimizu & Pitts, 2021 (Hymenoptera Pompilidae) in China, with description of two new species and an updated key to world species, Zootaxa 5244 (2), pp. 160-172 : 162-164

Erythropompilus venterisetalis Wu & Ma , sp. nov.

Figs 1 , 4 (A–C)

urn:lsid:zoobank.org:act:10A825F9-9A88-49C2-BEB5-D9A44684CB96

Material examined. Holotype: CHINA, Yunnan, Xishuangbanna, Mengla, Xishuangbanna Tropical Botanical Garden , teak plantation, ♁, 21°54′N 101°16′E, 508 m, Malaise trap, 13.VII–13.VIII.2021, coll. Yong-sheng Pu (YNAU) . Paratypes: CHINA, Yunnan, 13♁, same locality as holotype, 14.VII–14.VIII.2020 (5♁), coll. Yongsheng Pu, 24.IV–31.V.2019 (7♁), coll. Ling Zhao, 14.IX–14.X.2019 (1♁), coll. Ling Zhao; 2♁, Xishuangbanna Prefecture, Wild Elephant Valley , 22°6′N 100°51′E, 783 m, 15.VII.2016, coll. Qing-xia Zhou (YNAU) .

Diagnosis. The male of the new species is similar to E. thailandensis Pitts & Shimizu, 2021 in having the following characteristics: body black, mesosoma partly orange-red ( Figs 1A , 5A ), clypeus as broad as LID ( Figs 1D , 5D ), mid and hind femora with small spines set in pits apicodorsally, and exposed portion of SGP flat, mostly parallel-sided ( Fig. 1K ); but markedly differs by the characters given in the Table 1.

Description. Male. (Measurements of the holotype are given in parentheses). Length: body 4.3–6.3 (5.8) mm; forewing 4.1–5.6 (4.6) mm. Body black; mandible reddish brown at apical 1/4, sometimes subapical yellow brown, basal of mandible with 2–5 (3) brown long setae ( Fig. 1D ); the following yellow brown to fulvous: palpi, scape, pedicel, F1–F4 beneath, apical 1/7 of fore femora ventrally, fore tibia ventrally, fore tarsus ( Figs 1A, 1D ); the following orange: posterior margin of pronotum, sides of mesoscutum and posterior margin, mesopleuron, scutellum, metanotum, postnotum, upper half of mesopleuron and posterior rim of propodeum ( Figs 1A, 1E ).

Head: Mandible with one inner tooth, clypeus slightly convex in lateral view, anterior margin nearly straight ( Figs 1C, 1D ). In frontal view, head 1.19–1.25 (1.25) × as broad as long; vertex slightly convex between eye tops, frontal line fine and inconspicuous; MID large, 0.58–0.62 (0.6) × as broad as TFD; UID: MID: LID = 8.0–9.0 (8): 10: 7.5–8.0 (7.5); clypeus 2.3–2.7 (2.5) × as broad as long, clypeus equal to LID ( Fig. 1D ). In dorsal view, ocellar area with several sparse punctures, ocelli in obtuse triangle, POD: OOD = 1: 0.7–0.8 (0.73); antennocular line distinctly inclined from antennal base toward eye ( Fig. 1B ); antenna pointed at apex, F1 2.5–3.1 (3) × as long as thick, 0.5–0.67 (0.61) × as long as UID, length ratios of scape, pedicel, F1–F3 = 11–12 (12): 4: 14–15(15): 15: 14–15 (15) ( Figs 1G, 1H ). In lateral view, gena short, 0.2–0.3 (0.2) × eye width ( Fig. 1C ).

Mesosoma: Lateral margin of pronotal dorsum, in dorsal view, slightly narrowing anteriorly, pronotum posterior margin slightly arcuate, and conspicuously shorter than mesoscutum ( Fig. 1E ); in dorsal view, mesoscutum slightly raised, notaulus fine and short anteriorly and medially, parapsidal sulcus reaching nearly 5/6 of mesoscutum; scutellum disc slightly raised, convex above level of mesoscutum; metanotum posterior margin extending at middle and covering postnotum partly; postnotum nearly 1/10 as long as metanotum, depressed medially and narrower than laterally; propodeum, in dorsal view, parallel-sided at anterior half, strongly narrowing at posterior half; in lateral view, gently convex, posterior slope at apical 1/3; propodeal enclosure irregularly reticulate-rugose, and with a pair of subparallel longitudinal carinae medially.

Wing: Pterostigma long, 5–6.5 (6) × as long as 2r-rs; marginal cell removed from wing tip by 0.4 × its own length; SMC2: SMC3 = 1: 1.3–1.6 (1.3) on vein M, 1: 0.4–0.6 (0.5) on vein RS, SMC2 broad on vein RS by 1: 0.9–1 (0.9) × its length on vein M, receiving crossvein 1m-cu at basal 0.35–0.55 (0.5); SMC3 narrowed on vein RS by 0.3–0.4 (0.4) × its length on vein M, receiving crossvein 2m-cu at basal 0.5–0.6 (0.55), removed from outer wing margin by 1.4–1.9 (1.5) × its own length. FW crossvein cu-a originating at or slightly beyond fork of vein M+CuA; HW crossvein cu-a arc-like, originating anterior to fork of vein M+CuA (fig. 1F).

Legs: Mid and hind femora with 1–2 small spines set in pits apicodorsally; mid tibia dorsally with 3–5 (5) stout brown spines externally and 1–3 (3) brown spines internally, mid tibia ventrally with 0–2 (0) small brown spines externally and 0–2 (1) small brown spines internally; hind tibia dorsally with 5–6 (6) stout brown spines externally and 4–5 (5) stout brown spines internally, hind tibia ventrally with 1–3 (2) small brown spines externally and 1–3 (2) small brown spines internally. Longer spur of hind tibia 0.68–0.72 (0.7) × hind tarsomere 1.

Metasoma: Side of S4 and S5, each with tuft of dense, erect and black bristles ( Fig. 1J ); S6 flat ventrally, posterior margin with arcuate emargination ( Fig. 1I ); S6 with long blade-like longitudinal keel medially, almost reaching posterior margin ( Fig. 1I ).

SGP and genitalia: SGP, in ventral view, exposed part broad and parallel-sided, translucent and rounded apically, basal sides with weak carina; in lateral view, SGP flat, slightly thickened basally and medially, and with sparse, oblique backward setae, subapically ones long ( Fig. 1K ). Paramere very short, oval-like ( Fig. 4A ); volsella narrow in basal 1/3, gradually broadened towards apex, rounded apically, with numerous long setae in apical 1/2 ( Fig. 4B ); parapenial lobe conspicuously extending apex of volsella, inner margin in apical 1/3 with fine and irregular serrate ( Fig. 4C ); aedeagus conspicuously longer than parapenial lobe, mostly parallel-sided, apical margin slightly emarginated medially ( Fig. 4B ).

Female. Unknown.

Distribution. China (Yunnan).

Etymology. The specific name venterisetalis originates from the Latin "venter" (=ventral) and "setalis" (=setae), referring to S4 and S5 of the male with a dense tuft of bristles on the sides.

Figures

FIGURE 1. Erythropompilus venterisetalis Wu & Ma, sp. nov., male.A, B, E-J, L Holotype; C, D, K Paratype. A habitus, lateral view; B head, dorsal view; C mesosoma, lateral view; D head, frontal view; E pronotum, dorsal view; F fore and hind wings; G left flagellomeres 1–11, external side; H left flagellomeres 1–11, inner side; I S5, S6, ventral view; J metasoma, lateral view; K SGP, ventral view; L left fore tarsus, lateral view. Scale bars: 1.0 mm.

FIGURE 4. A–C. Erythropompilus venterisetalis Wu & Ma, sp. nov., male. Paratype. A genitalia, lateral view; B genitalia, ventral view; C genitalia, dorsal view; D–F Erythropompilus macroplacoideus Wu & Ma, sp. nov., male. Paratype. D genitalia, lateral view; E genitalia, ventral view; F genitalia, dorsal view. Scale bar: 1.0 mm.

FIGURE 5. A–E. Erythropompilus thailandensis Pitts & Shimizu, 2021. female; A habitus, lateral view; B head, pronotum and mesoscutum, dorsal view; C head and mesosoma, lateral view; D head, frontal view; E right mid femur (right) and right hind femur (left), dorsal view. Scale bars: 1.0 mm.

Tables

TABLE 1. Structural differences between E. venterisetalis and E. thailandensis, males.

E. venterisetalis Wu & Ma , sp. nov.	E. thailandensis Pitts & Shimizu, 2021
a Placoid sensilla small, no more than 1/2 of each flagel-	flagellomere ( Figs 1G, 1H ).	Placoid sensilla large, much longer than 1/2 of each flagellomere ( Figs 1G, 1H ). lomere.	lomere.
flagellomere ( Figs 1G, 1H ).	lomere.
b Frons spherically convex in profile ( Fig. 1C ).	Frons gently convex in profile.
c Side of S4 and S5, each with tuft of dense, erect and	Side of S4 and S5 without tuft of dense, erect and black
black bristles ( Fig. 1J ); S6 with long blade-like longitudinal	medikeel medially, almost reaching posterior margin, posteriorly	bristles; S6 without long blade-like longitudinal keel medikeel medially, almost reaching posterior margin, posteriorly ally, posteriorly with inverted-V-shaped emargination.	ally, posteriorly with inverted-V-shaped emargination.
medikeel medially, almost reaching posterior margin, posteriorly	ally, posteriorly with inverted-V-shaped emargination.
with arcuate emargination ( Fig. 1I ).
d SGP broad ( Fig. 1K ).	SGP narrow.
e Inner margin of parapenial lobe with fine and irregular	Inner margin of parapenial lobe smooth, without serrate.
serrate in apical 1/3 ( Fig. 4C ).
f Volsella broadened at apical 2/3, apical 1/2 with numer-	Volsella broadened at apical 1/3, apex with short setae.
ous long setae ( Fig. 4B ).