Dyscritobaeus tanzaniensis Tortorici et Caleca,

Tortorici, Francesco, Caleca, Virgilio, Noort, Simon Van & Masner, Lubomir, 2016, Revision of Afrotropical Dyscritobaeus Perkins, 1910 (Hymenoptera: Scelionidae), Zootaxa 4178 (1), pp. 1-59: 55-57

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Dyscritobaeus tanzaniensis Tortorici et Caleca

sp. nov.

Dyscritobaeus tanzaniensis Tortorici et Caleca  sp. nov.

( Figs 30View FIGURE 30, 40fView FIGURES 40 a – f, 106, 107, 108View FIGURES 106 – 108)

urn:lsid:zoobank.org:act:15CB2DAA-B68A-4C5F-A9C5-652483D9B4E6 http://hol.osu.edu/index.html?id=410572

Diagnosis. The species is brachypterous; in the Afrotropical region this feature is shared only with D. kilimanjarensis  and D. parvipennis  . On T1 the pair of longitudinal submedial carinae are absent and T1 is homogenously coriaceous; only three brachypterous species, D. aspinosus  , D. carens  (female and male) and D. minoculo  (only male) from Australia have the same character state. The absence of the metanotal spine and the lack of a protruding metascutellum is shared only with D. aspinosus  , from which D. tanzaniensis Tortorici et Caleca  sp. nov. can be easily distinguished by the smaller A2–A3 ratio and darker color of the body.

Description. Male. Length of the body: 0.91 mm.

Head. Color brown. Coriaceous; head covered by short hairs, mandibles yellow. Frontal depression shallow and lightly coriaceous; central keel present ( Fig. 106View FIGURES 106 – 108). Fan-like striation in malar area from oral foramen to eye margin, fan-like striation not visible in genal area. Malar sulcus length: 0.15 mm. Preoccipital lunula present and sculptured ( Fig. 106View FIGURES 106 – 108). Head measures width: height: length = 0.37: 0.36: 0.21 mm. Eye measures width: length = 0.12: 0.16 mm. OOL: LOL: POL = 0.1: 0.1: 0.11 mm. Mandibles bidentate without odontoid process.

Antenna. Radicles and scape dark yellow; A 3  A 12 brown  ; A 1 length: 17  ; A 2 as long as A 3  ; A 11  : A 12 ratio= 1:2. 

Mesosoma. In dorsal view, mesoscutum brown; mesoscutellum brown with posterior margin yellow; propodeum brown to yellow in lateral margin( Fig. 108View FIGURES 106 – 108); mesosoma in lateral view light brown ( Fig. 107View FIGURES 106 – 108). In dorsal view mesoscutum and mesoscutellum imbricate ( Fig. 108View FIGURES 106 – 108); in lateral view speculum with furrow; femoral depression smooth with fan-like striation starting by post-ventral angle; posterior mesepimeral area not well delimitate anteriorly; dorsal and ventral metapleural area with crenulate depression with rugae ( Fig. 107View FIGURES 106 – 108); metapleural carina with one posterior pointed projection. Metascutellum not protruding, not visible in dorsal view, metanotal spine absent ( Fig. 108View FIGURES 106 – 108). Mesonotum length 0.24 mm, width 0.41 mm; mesoscutellum length 0.14 mm, width 0.32 mm.

Wings. Fore wing hyaline, brachypterous, do not reach T1; sm: 0.17 mm; wing width 0.06 mm, length 0.19 mm. as in Fig. 40fView FIGURES 40 a – f. Legs light brown.

Metasoma. Metasoma brown; laterotergites yellow; Coriaceous. On T1 pair of longitudinal submedial carinae absent ( Figs 107, 108View FIGURES 106 – 108).

Female: unknown

Comment and variability. The description of this species is based on only a single specimen, which, however, possesses uniquely diagnostic character states: brachypterous with the rare character state where the metascutellum is not visible in dorsal view.

Distribution. ( Fig. 109View FIGURE 109)

Etymology. The species is named after the country where the specimen was collected, Tanzania. Material examined. Holotype. Ƌ: AFRICA: Tanzania: West Usambara Forests - Site 4, Forest - montane - disturbed, 420m, 1996/05/13, Robertson, Winkler Bag, ( SAMC), [SAM-HYM-P018754] (wings on slide, in Fig. 40fView FIGURES 40 a – f).


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