A new species of the genus Petersenidia Lelej (Hymenoptera: Mutillidae) from Indonesia, eastward of Wallace’s line Author Lelej, Arkady S. text Zootaxa 2021 2021-07-29 5006 1 101 105 journal article 10.11646/zootaxa.5006.1.13 1175-5326 5157074 CFC5D524-A125-4D0B-8B61-943C01B2109F Petersenidia mikhailovi Lelej , sp. nov. Figs 5–8 Material examined. Holotype , ♀ , Indonesia : Sulawesi , Kotamobagu , Modoinding , Gn. Ambang , 12.XII.1999 , 1200–1450 m , leg. A. Riedel [ SMNK , temporary deposited in IBSS ] . Paratypes : 2 ♀ , with the same labels as holo- type [ IBSS ] . Etymology . I am happy to name this species for Mikhailov Kirill Glebovich, spider-man and publisher of sci- entific journals and many books on biology, for his 60 years jubilee. Various spider groups ( Corinnidae , Salticidae , Gnaphosidae ) are shown to be Batesian mimics of mutillids ( Edwards 1984 , Nentwig 1985 , Haddad, 2004 ). Diagnosis . FEMALE. The following combination of characters is diagnostic: humeral angle not produced, pronotum slightly broader than propodeum, mesosoma uniform orange, legs orange, metasoma entirely black, T2 sculpture dense, basal third of T2 with median longitudinal carina, T2 disc spots oval and separated by ~2 × spot diameter, T2 with black apical fringe, T3 band interrupted medially, and pygidium apically smooth, basally weakly sculptured. Body length 8.0– 9.6 mm . MALE. Unknown. Description . FEMALE. Body length 8.0– 9.6 mm . Coloration . Head black, except, mandible, scape and venter of flagellum largely red-brown. Mesosoma, coxae, tibiae, and femoral bases orange-brown, femoral apices and tarsi blackish. Metasoma black, except T6 largely red-brown. Body setae generally sparse and whitish, except frons, vertex and mesosomal dorsum with sub-erect blackish and red-brown setae; T2 disc, T4, and T5 setae dense black; T2 disc lateral spots, T3 interrupted band, and T6 basal tuft with dense whitish-silver setae; T2 lateral spot diam- eter 0.6 × distance between spots, T2 with apical fringe of black setae, and T3 band interrupted medially. Head . Width behind eye 1.1 × mesosoma width. Frons, vertex, and gena punctures dense to confluent. Mandible apex unidentate. Clypeus apically bidentate, teeth connected by transverse carina; basomedial portion with tubercle. An- tennal scrobe with arcuate dorsal carina and straight lateral carina. Antennal tubercle with scattered micropunctures. Genal carina weak, forming small tooth at hypostomal carina and extending posteriorly to occipital carina. F1 2.5 × pedicel length, F2 1.4 × pedicel length. Mesosoma . Length 1.5 × width. Dorsum of mesosoma with coarse confluent punctures; obscure interrupted carina separating dorsal and lateral faces of pronotum and mesonotum. Side of me- sosoma with dense micropunctures and short setae. Mesopleural lamella an obscure carina. Humeral carina weak, obscure. Ratio of width at humeral angle, anterior spiracle, narrowest point of mesonotum, propodeal spiracle, and midlength of propodeum 90:100:90:92:93. Scutellar scale rounded posteriorly, ~2 punctures wide. Posterior propo- deal face reticulate with many interspaces obliterated, leaving apparent striae. Lateral and posterior propodeal faces separated by wavy carina with few short teeth. Metatibio-tarsal ratio 110:45:30:25:15:15. Metasoma . T1 anterior face with sparse punctures, posterior with confluent punctures. T2 disc with moderate separated pits, interspaces micropunctate and setose; basal third of T2 with median longitudinal carina, apical half with obscure transverse de- pression. T3–5 and S3–5 with small dense punctures. S1 with longitudinal lamella, notched sub-anteriorly, highest posteriorly. S2 with sparse punctures, interspaces smooth. T2 felt line 0.2 × T2 total length. T6 with long sub-ovate pygidium, widest medially with lateral carina obliterated in posterior half; smooth on apical half, weakly sculptured on basal half. S6 posterior margin emarginate. FIGURES 1–8. Petersenidia spp. , ♀. 1–4 P. macassarica (Zavattari) (1–2, 4, lectotype); 5–8 P. mikhailovi sp. nov. (6–8, holo- type, 5, paratype). 1, 6–7 Habitus, dorsal (1, 7) and lateral (6) view; 2, 5 Metasoma, dorso-lateral view; 3, 8 Pygidial plate; 4 Labels. 1–2, 4 Photos by R. Poggi. 3, 6–8 Photos by V. Loktionov. Distribution . Indonesia : Sulawesi . Remarks . In Mickel’s (1935) key to the females of Timulla , this species keys to Petersenidia macassarica , having T2 with a high, median longitudinal carina on the basal half (by this character the new species and P. macassarica differ from other congeners), but the new species differs from P. macassarica in the much shorter and smaller carina on T2, the lack of a posterior interrupted pale fringe on T2 and the smooth pygidium.