Dissomphalus magnetus Mugrabi & Azevedo

MUGRABI, DANIELE F. & AZEVEDO, CELSO O., 2013, Revision of Thai Dissomphalus Ashmead, 1893 (Hymenoptera, Bethylidae), with description of twenty four new species, Zootaxa 3662 (1), pp. 1-73 : 54-56

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https://doi.org/ 10.11646/zootaxa.3662.1.1

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Dissomphalus magnetus Mugrabi & Azevedo

sp. nov.

Dissomphalus magnetus Mugrabi & Azevedo , sp. nov.

( Figs 83–85, 123, 214–215)

Description. MALE. Body length 1.82 mm. LFW 1.37 mm. Maximum wing width 0.61 mm. Color. Head and mesosoma black; metasoma dark castaneous.

Head. Mandible with three apical teeth. Clypeus with median lobe ill-defined; with one tooth, median tooth rounded; median carina absent. Ratio of first four antennal segments about 8:4:3:3. Frons weakly coriaceous, punctures small. LH 1.03 × WH, WF 0.65 × WH, WF 1.33 × HE, OOL 1.1 × WOT, DAO 0.33 × WOT, posterior

Mesosoma. Pronotal disc strongly coriaceous, anterior margin ecarinate. Notauli deep, complete, evenly narrow, converging posterad. Propodeal disc 0.78 × as long as wide; basal triangle rugulose, posterolateral area imbricate; median carina posteriorly incomplete; lateral margins weakly convex, parallel; posterior carina welldefined, convex. Lateral of propodeum mostly imbricate. Propodeal declivity mostly imbricate.

Metasoma. Tergal process with shallow, longitudinally elliptical and sublateral pair of depressions; depressions 0.67 × as long as tergite II, diverging posterad, distant each other 2.5 × maximum transverse diameter, with setae long and lateroposterad on lateral area; small and low pair of tubercles placed on anterior area of depression, margin angular; lateral stalk of hypopygium 0.13 × as long as median stalk; posterior margin weakly concave; corner rounded ( Fig. 123).

Genitalia ( Figs 214–215). Genital ring produced, each half straight in dorsal view. Basiparamere with dorsal surface rectangular, much narrower than ventral surface. Paramere with basal area wider than basiparamere apex; apex angulate; apical margin strongly concave in ventral view, angled mesad. Basivolsella setose, with three thick, short, median and apical setae. Aedeagus 1.94 × as long as wide; dorsal body of aedeagus narrower apically, narrowing progressively apicad, lateral margin straight, parallel, wholly much curved dorsad, apex with one pair of outer lobe; base of dorsal body of aedeagus weakly sclerotized, triangular, with median region angulate; ventral ramus of aedeagus almost as high as dorsal body, lateral margin of ventral ramus sinuous, wider medially and apex much narrower than base. Apodeme extending beyond genital ring.

FEMALE unknown.

Material examined. Holotype, ♂. THAILAND. Chiang Mai: Doi Inthanon NP, Vachiratharn Falls , 18°32.311’N 98°36.048’E, 700 m, Malaise trap, 15–22.vii.2006, Y. Areeluck leg., T68 GoogleMaps . Paratypes: THAILAND. Malaise trap, Chiang Mai: Songkrant Jagsu & Apichat Watwanich leg., Doi Chiang Dao WS , 1 ♂ behind water reservior, 19°24.328’N 98°55.237’E, 549 m, 31.vii–7.viii.2007, T2806 GoogleMaps ; 3 ♂ Nature Trail, 19°24.187’N 98°55.312’E, 491 m, 28.viii–4.ix.2007, T2831 GoogleMaps ; Doi Inthanon NP, Vachiratharn Falls , 18°32.311’N 98°36.048’E, 700 m, 2–8.vii.2006, Y. Areeluck leg. GoogleMaps , 1 ♂ T51 , 1 ♂ T116 . Lampang: Bunruen Kwunnui & Acharaporn Sukpeng leg., Chae Son NP, 1 ♂ entrance the Mea Khun-Mae Mon 18°49.989’N 99°28.445’E, 452 m, 1–8.viii.2007 T2848 GoogleMaps ; 2 ♂ Campground #3, 18°49.757’N 99°28.266’E, 487 m, 1–8.x.2007, T2814 GoogleMaps . Sakon Nakhon: 1 ♂ Phu Pha Yon NP, Channel , 16°55.639’N 104°10.748’E, 295 m, 17–23.vii.2006, Manop Ngoyjansri & Chatree Cheaukamjan leg., T295 GoogleMaps . Phitsanulok: Thung Salaeng Luang NP, Mix deciduous forest, 16°50.319’N 100°51.792’E, 479 m, Pongpitak Pranee leg. GoogleMaps , 2 ♂ 11–18.viii.2006, T568 , 2 ♂ 1–8.ix.2006, T577 .

Variations. Body length between 1.71 and 2.50 mm; LFW between 1.37 and 1.63 mm; maximum wing width between 0.61 and 0.76 mm.

Remarks. Dissomphalus magnetus sp. nov. is similar to D. thaianus and D. barbus sp. nov. because of the following characteristics: basiparamere and paramere narrow in dorsal view, aedeagal dorsal body wide and ventral ramus wider medially. However, dorsal body of D. magnetus sp. nov. is entirely wide, and its apex has wide exposure of inner lobes; the aedeagal ventral ramus is as long as dorsal body and narrow with abrupt widening between apex of basal region and base of median region; the aedeagal apodeme is long and with apex turned mesad.

Distribution. Thailand (Chiang Mai, Lampang, Sakon Nakhon and Phitsanulok).