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

Dyscritobaeus tanzaniensis Tortorici et Caleca sp. nov.

( Figs 30 , 40f , 106, 107, 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. 106 ). 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. 106 ). 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. 108 ); mesosoma in lateral view light brown ( Fig. 107 ). In dorsal view mesoscutum and mesoscutellum imbricate ( Fig. 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. 107 ); metapleural carina with one posterior pointed projection. Metascutellum not protruding, not visible in dorsal view, metanotal spine absent ( Fig. 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. 40f . Legs light brown.

Metasoma. Metasoma brown; laterotergites yellow; Coriaceous. On T1 pair of longitudinal submedial carinae absent ( Figs 107, 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. 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. 40f ).

Figures

FIGURE 30. Dyscritobaeus tanzaniensis Tortorici et Caleca sp. nov. Ƌ holotype: metascutellum not protruding, metanotal spine absent; FIGURE 31. D. sulawensis Ƌ: metascutellum (a) protruding, triangular; large metanotal spine; FIGURE 32. D. flavus Tortorici et Caleca sp. nov. Ƌ from Central African Republic: metascutellum (b) protruding, wide with posterior margin subparallel to mesoscutellum margin; small metanotal spine.

FIGURE 109. Distribution of Dyscritobaeus tanzaniensis Tortorici et Caleca sp. nov.

FIGURES 40 a – f. Fore wings: a — Dyscritobaeus. parvipennis ♀, from Western Australia; b — D. parvipennis Ƌ, from Zimbabwe; c — D. orientalis holotype ♀; d — D. parvipennis Ƌ, from Queensland; e — D. kilimanjarensis Tortorici et Caleca sp. nov. holotype Ƌ; f — D. tanzaniensis Tortorici et Caleca sp. nov. holotype Ƌ.

FIGURES 106 – 108. Dyscritobaeus tanzaniensis Tortorici et Caleca sp. nov. Ƌ, holotype [SAM-HYM-P 018754]: 106 — head, frontal view; 107 — head, mesosoma and metasoma, lateral view; 108 — head, mesosoma and metasoma, dorsal view.