Eotrogaspidia melanopleura Okayasu, Lelej & Williams, 2021

Okayasu, Juriya, Lelej, Arkady S. & Williams, Kevin A., 2021, Review of Eotrogaspidia Lelej (Hymenoptera: Mutillidae: Trogaspidiini), Zootaxa 4920 (1), pp. 56-90 : 76-78

Eotrogaspidia melanopleura Okayasu, Lelej & Williams , sp. nov.

( Figs 2D, 2H , 12D )

Diagnosis. FEMALE. Head with large coarse punctures. Mesosoma dark reddish brown, mesopleuron, metapleuron, antero-dorsal angle of lateral propodeal face and ventral half of posterior propodeal face blackish ( Fig. 2H ); thoracic dorsum with larger coarser punctures than on head, giving foveate-alveolate appearance ( Fig. 2D ); posterolateral propodeal margin distinctly dentate. T2 pale setal spots small, distance between them 1.43 × spot diameter ( Fig. 2D ); T3–4 with a pair of small lateral pale setal spots, distance between spots and that between spot and lateral margin of tergum approximately equal to spot diameter ( Fig. 2D ); pygidial plate irregularly rugose on anterior 1/2 and smooth posteriorly ( Fig. 12D ). MALE. Unknown.

Description. FEMALE. Body length: 6.72 mm.

Color and setae. Black with antennal tubercle, mandible on basal 2/3 yellowish brown, clypeus, postgenal bridge, scape, pedicel and metasomal sterna reddish brown, flagellum ventrally and legs dark brown, palpi yellow, mesosoma dark reddish brown except pronotal collar, meso- and metapleuron, antero-dorsal angle of lateral propodeal face and ventral half of posterior propodeal face black, tibial spurs yellow. Head entirely covered with sparse long erect golden setae; frons, postgenal bridge, scape, prementum and stipes with sparse short recumbent golden setae; vertex and gena with dense short appressed golden setae; antennal scrobe with sparse long appressed golden setae; clypeus and mandible with sparse long erect pale golden setae; pedicel, flagellum and palpi with dense extremely short recumbent pale golden setae. Mesosoma dorsally with sparse long golden setae; thoracic dorsum with sparse short recumbent golden setae; lateral face of mesosoma with short appressed pale golden setae, sparse on pronotum, dorsal half of meso- and metapleuron and propodeum, and dense on ventral half of meso- and metapleuron, with few long erect pale golden setae on propodeum. Legs entirely covered with sparse long pale golden setae, erect on procoxa, trochanters, femora and tibiae, recumbent on meso- and metacoxa and tarsi; procoxa with dense short appressed pale golden setae; femora and tibiae with sparse short recumbent pale golden setae. T1, T3–5 laterally, T6 and S1–2 with sparse long erect pale golden setae; T2 disc and T3–5 with dense short recumbent black setae; T2 laterally with sparse long recumbent and sparser long erect pale golden setae; S3–6 with sparse short erect pale golden setae; T1 with posterior sparse fringe of black setae; T2 with two transversely aligned small spots of dense appressed pale golden setae, with distance between spots 1.43 × spot diameter; T2 laterally with golden felt line 0.4 × T2 length; T3 and T4 with lateral spot of dense appressed pale golden setae, separated from lateral margin of terga; T6 with sparse lateral pygidial fringe of pale golden setae; S2–S6 with posterior sparse fringe of pale golden setae.

Structure. Head 1.41 × wider than long; posterior margin truncate in dorsal view; gena wide; minimum distance between eyes 1.31 × eye height; eye height 2.03 × malar distance; frons and vertex with large confluent punctures, intervals smooth; gena with large dense punctures, intervals densely micropunctate; post genal bridge with large sparse punctures; genal carina sharp, reaching ventral half of gena; hypostomal tooth dentiform; antennal scrobe with distinct dorsal carina and dense micropunctures; antennal tubercle transversely wrinkled; eye oval, slightly protruding from head capsule. Clypeus with subapical transverse ridge and medial longitudinal ridge; transverse ridge medially interrupted and laterally connected with clypeus itself as large tooth; longitudinal ridge apically forming wide truncate tubercle; surface of clypeus with dense micropuntures. Mandible slender, apically pointed with one subapical inner denticle; ventral margin straight. Scape medially bending with small sparse punctures; surface of pedicel with minute sparse punctures; ration between length and width of pedicel, F1 and F2 = 1.00:1.71:3.14:2.29:2.14:2.14; F2–9 almost same in length and width; F10 slightly longer than F9, conical; surface of flagellum with minute dense punctures. Prementum flattened; prementum and stipes with dense micropunctures.

Mesosoma broadest at propodeum in dorsal view; ration between head width:humeral width:pronotal width: mesonotal width:propdeal width:metasomal width = 100:74:82:78:83:118; dorsal thoracic length 1.00 × pronotal width; anterior margin of dorsum of pronotum strongly arcuate, without dorsal tooth; pronotum laterally weakly projecting, forming weak rounded angle at pronotal spiracle; lateral margin of mesosoma weakly crenulate, divergent posteriorly; posterolateral margin of propodeum dentate; humeral angle rounded, with humeral carina weak, reaching dorsum of pronotum; mesopleuron concave; scutellar scale small, well defined with posterior margin truncate; scutellar scale width 1.33 × its length, 0.13 × propodeal width, and approximately 1.5 × diameter of nearby punctures; prescutellar scales absent; metanoto-propodeal suture obliterated; pronotal collar transversely wrinkled; thoracic dorsum with large confluent punctures, giving foveate-alveolate appearance; posterior propodeal face coarsely reticulate; propleuron and lateral face of mesosoma with dense micropunctures.

Procoxa with dense micropunctures; meso- and metacoxa, trochanters, femora, tibiae and tarsi with small sparse punctures; protarsus with weak outer spines; metacoxa with weak inner carina throughout; meso- and metatibiae with two rows of 4–5 longitudinal spines; claws simple, without inner denticle.

T1 without distinct dorsum; T2 evenly convex, dorsal T2 length 0.83 × T2 width; S1 with medial straight longitudinal carina with its outer margin slightly bi-notched; S2 evenly convex, without basomedial carina; T1, T2 laterally and S1 with mixed small and minute sparse punctures; T2 disc with small sparse and minute dense punctures; T3–5, T6 laterally and S3–6 with minute dense punctures; S2 with sparse large punctures; pygidial plate subconvex, laterally well defined by carina on posterior half; surface of pygidial plate coarsely irregularly rugose on anterior half and smooth on posterior half.

MALE. Unknown.

Type material. 1♀. Holotype, ♀, China: GUANGDONG: Lofoushan [= Mt. Luofushan], 18.VII.1937, T.C. Maa leg. [ TARI].

Distribution. China: Guangdong.

Etymology. The specific epithet melanopleura is a combination of a Greek adjective μελαν (black, brown), and a Greek noun πλευρον, pl. πλευρα (pleuron, pleura) with reference to the blackish mesopleuron and metapleuron of this new species. Treat as a noun in apposition.

Remarks. This species is readily separated from females of the three East Asian species, E. auroguttata , E. amans and E. oryzae by having the T2 pale setal spots small and T3–4 with a pair of lateral pale setal spots. Eotrogaspidia buddha , E. rubripes and E. saussurei have similarly maculated metasomal terga, but this new species is recognized by having the frons and vertex punctures large and confluent (smaller and separated in others), the mesosoma dark reddish brown with partially blackish markings (uniformly yellowish red in others), the thoracic dorsum with large confluent punctures (with finer punctation in others), the lateral margin of posterior propodeal face dentate (at most tuberculate in E. rubripes ), the width of pale spots on T3 and T4 equal to the distance between them and that between the spot and lateral margin of the terga (twice larger in E. rubripes ), and the pygidial plate irregularly rugose on the anterior half and smooth on the posterior half (irregularly rugose on anterior 1/ 3 in E. buddha ; transversely rugose throughout in E. saussurei ).

Figures

FIGURE 2. Eotrogaspidia spp., ♀, habitus. A, E. E. amans (André); B, F. E. auroguttata (Smith); C, G. E. buddha sp. nov., paratype; D, H. E. melanopleura sp. nov., holotype; A–D. dorsal view; E–H. lateral view.

FIGURE 12. Eotrogaspidia spp., ♀, pygidial plate. A. E. amans (André); B. E. auroguttata (Smith); C. E. buddha sp. nov., paratype; D. E. melanopleura sp. nov., holotype; E. E. oryzae (Pagden); F. E. rubripes (André); G. E. saussurei (Lelej); H. Trogaspidia vallicola Tsuneki, holotype.