Erythropompilus macroplacoideus 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 : 164-169

publication ID	https://doi.org/ 10.11646/zootaxa.5244.2.4
publication LSID	lsid:zoobank.org:pub:B89B5171-3D4D-4FDD-8CCF-94DCE8A56EAE
DOI	https://doi.org/10.5281/zenodo.7670776
persistent identifier	https://treatment.plazi.org/id/1DF79C9F-7F8D-41C7-BDAF-0253B503357F
taxon LSID	lsid:zoobank.org:act:1DF79C9F-7F8D-41C7-BDAF-0253B503357F
treatment provided by	Plazi
scientific name	Erythropompilus macroplacoideus Wu & Ma
status	sp. nov.

Treatment

Erythropompilus macroplacoideus Wu & Ma , sp. nov.

Figs 2 View FIGURE 2 , 3 View FIGURE 3 , 4 View FIGURE 4 (D–F)

urn:lsid:zoobank.org:act:1DF79C9F-7F8D-41C7-BDAF-0253B503357F

Material examined. Holotype: CHINA, Yunnan, Jinghong, Menghai, Bulang Mountain , ♀, 21°45′N 100°26′E, 1683 m, Malaise trap, 17.V–25.VI.2021, coll. Yong-sheng Pu (YNAU) GoogleMaps . Paratypes: CHINA, Yunnan, 1♀ 1♁, same locality as holotype, 17.V–21.VI.2018, coll. Ling Zhao (YNAU) GoogleMaps .

Diagnosis. The new species is similar to E. taiwanensis Pitts & Shimizu, 2021 in having the following characteristics: frons strongly convex in profile ( Figs 2C View FIGURE 2 , 3C View FIGURE 3 ); clypeus less than LID ( Figs 2D View FIGURE 2 , 3D View FIGURE 3 ); ratio of POD/ OOD larger than 0.85; gena, in dorsal view, thickened, roundly receding posteriorly ( Figs 2B View FIGURE 2 , 3B View FIGURE 3 ); mid and hind femora without small spines set in pits apicodorsally; but markedly differs by the characters given in the Table 2. View TABLE 2

Description. Female. (Measurements of the holotype are given in parentheses.) Length: Body 6.0–6.5 (6.5) mm; forewing 5.3–5.6 (5.6) mm. Body black, mandible red-brown at apical 1/3, mandible with 2 brown long setae on basal 2/5 ( Fig. 2D View FIGURE 2 ), the following brown: beneath of scape, apical 1/6 of fore coxa and femur ventrally, fore tibia ventrally; Mesosoma orange-red, expect for collar, anterior margin of pronotum and lower 1/7 of mesopleuron, sometimes propodeum black ( Figs 2A, 2J View FIGURE 2 ).

Head: Mandible with one inner tooth, clypeus slightly convex in lateral view, anterior margin nearly straight ( Fig. 2D View FIGURE 2 ). In frontal view, head 1.25 × as broad as long; vertex distinctly convex between eye tops, frontal line fine and inconspicuous; MID large, 0.63–0.64 (0.64) as broad as TFD, UID: MID: LID = 8.5: 10: 7.5–8 (8); clypeus 2.3 × as broad as long, clypeus width less than LID ( Fig. 2D View FIGURE 2 ). In dorsal view, ocellar area with several sparse punctures, ocelli in obtuse triangle, POD: OOD = 1: 0.9; antennocular line, in dorsal view, distinctly inclined from antennal base toward eye ( Fig. 2B View FIGURE 2 ); F1 4.2 × as long as thick, 0.68 × as long as UID; length ratios of scape, pedicel, F1–F3 = 12: 5: 18: 16: 15. Flagellomeres with placoid sensilla on inner and external surfaces, external sensilla more than 3/4 each flagellomere, internal F1–F6 less than half of each flagellomere, apical 4 segments less than half of each flagellomere, gena slightly thickened, 0.3 × eye width ( Fig. 2C View FIGURE 2 ).

Mesosoma: Lateral margin of pronotal dorsum, in dorsal view, anteriorly slightly narrower than posterior area, pronotum posterior margin slightly arcuate ( Fig. 2E View FIGURE 2 ), pronotum conspicuously shorter than mesoscutum; in dorsal view, mesoscutum flat, slightly inclined towards posteriorly, parapsidal sulcus reaching nearly 5/6 of mesoscutum; scutellum disc raised, but not convex above level of mesoscutum; metanotum posterior margin extending at middle and covering partly postnotum, postnotum nearly 1/10 as long as metanotum, depressed medially and narrower than laterally ( Fig. 2G View FIGURE 2 ). propodeum, in dorsal view, parallel-sided at anterior half, narrowing at posterior half, in lateral view, gently convex, posterior slope at apical 1/3; propodeal enclosure irregularly rugose, and with two longitudinal carinae medially.

Wing: Pterostigma long, about 5 × as long as 2r-rs ( Fig. 2F View FIGURE 2 ); marginal cell removed from wing tip by 0.57 (0.5) × its own length; SMC2: SMC3 = 1: 1.6 on vein M, 1: 0.5 on vein RS; SMC2 broad on vein RS, equal to its length on vein M, receiving crossvein 1m-cu at basal 1/2; SMC3 narrowed on vein RS by 0.3 × its length on vein M, receiving crossvein 2m-cu at basal 0.6, removed from outer wing margin by 1.7 × its own length, crossvein cu-a originating basally to fork of vein M+CuA; HW crossvein cu-a arcute, originating much basal to fork of vein M+CuA.

Legs: Mid femur without small spines set in pits apicodorsally, mid tibia dorsally with 4 long brown spines externally and without spines internally, mid tibia ventrally with 2 small brown spines externally and 1 internally respectively; hind tibia dorsally with 6–7 long brown spines externally and 3–5 long brown spines internally, hind tibia ventrally with 1–3 small brown spines externally and 2 small brown spines internally. Longer spur of hind tibia 0.68 × hind tarsomere 1.

Male. Differs from female as follows: body length 4.0 mm; forewing 3.8 mm; antenna, clypeus, labrum, mandible basally, all legs and metasoma dark rufous; scape and pedicel ventrally, femur and tibia of fore leg pale brown; pronotum largely, mesoscutum and propodeum black ( Fig. 3A View FIGURE 3 ).

Head: In frontal view, head 1.19 × as broad as long ( Fig. 3D View FIGURE 3 ); MID large than female, 0.66 as broad as TFD, UID: MID: LID = 9: 10: 8.3; clypeus 2.5 × as broad as long, F1 2.7 × as long as thick, 0.44 × as long as UID; length ratio of scape, pedicel, F I–III = 10: 4: 12: 12: 13 ( Fig. 3H View FIGURE 3 ), gena narrow, 0.25 × eye width ( Fig. 3C View FIGURE 3 ).

Mesosoma: Notaulus of mesoscutum fine and short anteriorly and medially.

Wing: FW inner fasciae light, narrower than that in female, marginal cell removed from wing tip by 0.38 × its own length; SMC2: SMC3 = 1: 1.8 on vein M.

Legs: Mid tibia dorsally with 3 short brown spines externally, mid tibia ventrally without spine internally; hind tibia dorsally with 3 short brown spines externally and without spine internally.

Metasoma: Side of S4 and S5, each with tuft of sparse, erect and black bristles ( Fig. 3J View FIGURE 3 ); S6 flat in basal 1/4, with oblique declivity in apical 3/4, posterior margin with inverted V-shaped edge ( Fig. 3J View FIGURE 3 ); S6 with blade-like longitudinal keel far from posterior margin ( Fig. 3J View FIGURE 3 ).

SGP and genitalia: Exposed portion of SGP narrowing apically, subbasally widest, rounded and translucent apically ( Fig. 3K View FIGURE 3 ); in lateral view, SGP flat, with clearly triangular-shape ridge basally, and some sparse short setae in basal 2/3 ( Fig. 3J View FIGURE 3 ). Paramere very short, peg-like ( Fig. 4D View FIGURE 4 ); volsella narrow at basal 1/2, gradually broadened towards apex, rounded apically, and with several long setae at apical 1/3 ( Fig. 4E View FIGURE 4 ); parapenial lobe slightly extending apex of volsella, inner margin entirely with fine and irregular serrate ( Fig. 4F View FIGURE 4 ); aedeagus slightly longer than parapenial lobe, mostly parallel-sided, apical margin conspicuously concave medially ( Fig. 4E View FIGURE 4 ).

Distribution. China (Yunnan).

Sex association. Not only were all the female and male specimens collected from the same Malaise trap, but they also have the same pattern and the following common characteristics: ratio of POD: OOD; clypeus <LID; in dorsal view, gena slightly thicken; frons strongly convex; and body color.

Etymology. The name macroplacoideus originates from the Greek word " mac "(=long, large) and " placoideus " (= placoid), referring to the flagellomeres of male with huge placoid sensilla.

E. macroplacoideus Wu & Ma , sp. nov.	E. taiwanensis Pitts & Shimizu, 2021
a Mesosoma partly orange-red ( Fig. 2B View FIGURE 2 ). (♀, ♁)	Mesosoma entirely black (female) or dark rufous. (♁)
b Lateral margin of pronotal dorsum, in dorsal view,	Lateral margin of pronotal dorsum, in dorsal view, not
slightly narrowing anteriorly ( Fig. 2E View FIGURE 2 ). (♀)	narrowing anteriorly. (♀)
c F1/ UID about 0.7 (♀), F1 / UID <0.5. (♁) d Placoid sensilla large, more than 3/4 of each	F1/ UID about 0.8 (♀), F1 /UID> 0.5. (♁) Placoid sensilla small, much shorter than 1/2 of each
flagellomere ( Fig. 3H View FIGURE 3 ). (♁)	flagellomere. (♁)
e Paramere very short ( Fig. 4D View FIGURE 4 ). (♁)	Paramere long. (♁)
f Aedeagus extending beyond apex of parapenial lobe,	Aedeagus not extending beyond apex of parapenial lobe,
and apex conspicuously concave medially ( Fig. 4E View FIGURE 4 ). (♁)	and apical margin not emarginated medially. (♁)