Zeugomutilla angkorensis Williams

Lelej, Arkady S., Williams, Kevin A., Loktionov, Valery M., Pang, Hong & Xu, Zai-Fu, 2017, Review of the genus Zeugomutilla Chen, 1957 (Hymenoptera, Mutillidae, Mutillini), with description of two new species, Zootaxa 4247 (1), pp. 1-15 : 4-5

Zeugomutilla angkorensis Williams , sp. nov.

( Figs 37–42 )

Diagnosis. Male. Body length 8.8–10.6 mm. Flagellomere 1 0.48–0.51 × flagellomere 2. POL:OOL=0.51. Distance between outer ocellar margins 0.81 × distance between posterior ocelli and dorsoposterior occipital border. Metanotum densely punctate, with median glabrous narrow area. Female. Unknown.

Material examined. Holotype, ♂, pinned, Vietnam : "S[outh] VIETNAM: Dông Nai / Cát Tiên N.P., c 100 m / 1–9.x.2005, Ficus trail, Mal. / trap 1–8, C.v. Achterberg / & R. de Vries, RMNH’05 // Zeugomutilla / angkorensis / Williams in / Lelej et al. 2017 / HOLOTYPE " [ RMNH] . Paratypes: Cambodia: Siem Reap, Preah Khan Temple , 8–16.vi.2005 (I. Var), Malaise trap, 1♂ [ RBINS] ; Thailand: Phetchabun, Khao Kho NP office, 16o39.55''N 101o8.123'E, 230 m, 19–26.VII.2006 (Somchai Chatchumnan & Sa-ink Singtong), Malaise trap, T170, 2♂ [ EMUS, QSBG] ; Vietnam: Dông Nai, Cát Tiên N.P., c 100 m, (C.v. Achterberg & R. de Vries), Ficus trail: Malaise traps 14–19: 13–20.v.2005, 1♂ [ RMNH] ; Malaise traps 1–8, 1–9.x.2005, 2♂ [RMNH], 2♂ [CDFA].

Description. Male. Body length 8.8–10.6 mm. Black with metasomal terga 1–5 and sterna 1–3 ferruginous. Frons, lateral area of clypeus, and base of mandible with pale grayish, dense, subappressed setae; gena with pale grayish, dense, erect setae; vertex with whitish, sparse setae; pronotum, propleuron and mesoscutum with whitishyellow, dense, recumbent setae (posterior pronotal margin densely fringed); mesopleuron, lateral area of metanotum and dorsum of propodeum with grayish, dense, appressed setae; posterior propodeal slope with grayish, sparse, erect setae; mesoscutellum and lateral propodeal slope with sparse setae; legs with grayish, dense, suberect setae. Metasomal terga with appressed golden setae, becoming darker brown apically, sterna with sparse subappressed yellow-gray setae. Metasomal tergum 2 with lateral felt line, sternum 2 without lateral felt line.

Relation of head width and mesosoma width including tegula about 144:169. Mandible bidentate at apex, with strong subbasal tooth on inner border and dorsal carina extending from base to subapical tooth; outer margin simple beneath, but emarginate and broadened basally. Clypeus with median subtriangular area raised, and with anterior margin slightly notched. Scape bicarinate beneath, flagellomere 1 0.48–0.51 × flagellomere 2; antennal scrobe obscurely carinate. Ocelli small, POL:OOL=0.51. Distance between outer ocellar margins 0.81 × distance between posterior ocelli and dorsoposterior occipital border. Frons and vertex with fine, well separated punctures, frons with interspaces micropunctate and setose, vertex with interspaces simple; gena with fine, dense punctures.

Notauli well developed and touching anterior border of mesoscutum. Parapsids poorly defined. Tegula large, blackish, with smooth and shining outer margin. Mesoscutellum evenly convex. Metanotum densely punctate, with median glabrous narrow area. Pronotum and mesopleuron with moderately fine, confluent punctures; mesoscutum with moderately coarse, more or less separated punctures; mesoscutellum with moderately coarse, somewhat confluent punctures; propleuron obscurely punctate; inferior portions of metapleuron glabrous and shining. Propodeum reticulate, with larger cells laterally and dorsomedially.

Forewings fuscous, submarginal cell 1 large, subtriangular, acute apically, approximately equal in length to marginal cell; submarginal cell 2 receiving recurrent vein at midpoint; submarginal cell 3 less distinct than submarginal cell 2 and receiving recurrent vein at midpoint.

Longitudinal carina on metasomal sternum 1 well developed, ¾ × as long as sternum 1 in profile, straight; sternum 2 with posterior fifth replaced by strong, roundish elevation. Terga 1–6 and posterior halves of sterna 3–6 with moderately fine, well separated punctures; sterna 1–2 with moderately coarse, separated punctures; sternum 8 (hypopygium) and basal half of tergum 7 with moderately coarse, dense punctures. Apical half of pygidial plate on tergum 7 narrowly glabrous medially. Genitalia see Figs 39–42 .

Female. Unknown.

Distribution. Cambodia (Siem Reap), Thailand (Phetchabun), and Vietnam (Dông Nai).

Remarks. This species is similar to Zeugomutilla pycnopya and Z. pangi Lelej , sp. nov., but is immediately recognized by the short flagellomere 1 (flagellomere 1 at least 0.75 × flagellomere 2 in Z. pycnopyga and Z. pangi ). The species has an overlapping range with Z. pycnopyga in Thailand, but the full distribution of these species is uncertain. The female is not yet recognized, but one female of Z. saepes that was collected in Cambodia has the metasomal tergum 2 setal spots larger than typical Z. saepes (Figs 6, 36) and may actually belong to Z. angkorensis .

Etymology. This species is named after Angkor, capital of the ancient Khmer Empire (c. 802–1431), which at various points in history encompassed the range of this species in modern Cambodia, Thailand, and Vietnam.

Figures

FIGURES 37 – 42. Zeugomutilla angkorensis, sp. nov. (37 – 38, ♂, holotype; 39 – 42, ♂, paratype). 37. Head, anterior view; 38. Habitus, lateral view; 39 – 42. Genitalia (39, dorsal, 40, ventral, 41, lateral view, 42, lateral view, penis valve). Scale bars for 37 = 1.0 mm, 38 = 2.0 mm, 39 – 41 = 0.2 mm.