Habritella mandibulata, Mitroiu, 2022

Mitroiu, Mircea-Dan, 2022, The Afrotropical species of Habritella Girault & Dodd (Hymenoptera: Pteromalidae), European Journal of Taxonomy 813 (1), pp. 155-172 : 162-165

Habritella mandibulata sp. nov.

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Fig. 2

Diagnosis

Both sexes

Gena with large hollow at mouth corner ( Fig. 2C ). Clypeus reticulate, well delimited laterally. Clypeal margin without any median incision ( Fig. 2C ). Mandibles very large ( Fig. 2C ). Pronotal collar with anterior margin rounded, not carinate ( Fig. 2A ). Scutellum about equal to mesoscutum. Toruli above centre of face, although not very high ( Fig. 2C ). Fore wing ( Fig. 2F ) densely setose, speculum smaller, not reaching stigmal vein thus admarginal setae on ventral side of wing not easily visible. Stigma very large, its height at least equal to minimum distance from stigma to PMV. Fore and mid coxae not metallic ( Fig. 2A–B ). Hind femur yellowish-brown.

Female

Clava with a terminal spicula ( Fig. 2G ). All gastral tergites normally developed, each with posterior margin entire ( Fig. 2E ). Head in frontal view without contrasting colours, gradually becoming darker above toruli ( Fig. 2C ). Metasoma mostly dark brown ( Fig. 2E ). Body setation dirty white, conspicuous ( Fig. 2A, C ).

Male

Flagellar setae erect ( Fig. 2H ). Clava with very short spike-like terminal process ( Fig. 2H ). Metasoma dark, with a dorsal pale spot.

Etymology

The specific epithet is an indication to the unusually large mandibles of this species.

Type material

Holotype SOUTH AFRICA • ♀; “S. Africa. R. E. Turner. Brit. Mus. 1921-476”; “ Mossel Bay , Cape Province. 1-14.xi.1921 ”; NHMUK.

Allotype SOUTH AFRICA • ♂; “S. Africa. R. E. Turner. Brit. Mus. 1922-67”; “ Mossel Bay , Cape Province. January 1922 ”; NHMUK.

Additional paratypes SOUTH AFRICA • 1 ♀; same collection data as for holotype; NHMUK • 1 ♀; “S. Africa. R. E. Turner. Brit. Mus. 1922-2”; “ Mossel Bay , Cape Province. 18-30.xi.1921 ”; “ Stiloclava nov. gen. ” [Bouček’s handwriting]; NHMUK .

Description

Female holotype

BODY LENGTH. 2.3 mm.

COLOUR. Head ( Fig. 2C ) olive green getting blackish above toruli, including vertex and occiput. Eyes and ocelli dark brown. Antenna ( Fig. 2G ) with scape reddish-brown except whitish base, pedicel and flagellum reddish-brown except dark brown clava. Mandibles reddish-brown, teeth darker. Mesosoma dorsally dark olive green, laterally bluish-black ( Fig. 2A, D ). Coxae reddish-brown, hind coxa slightly darker on dorsal side. Trochanters, femora, tibiae and tarsi reddish-brown, except distal tarsal segment darker ( Fig. 2A ). Wings hyaline ( Fig. 2F ). Tegula reddish brown, venation brown. Metasoma dark brown, with some bluish reflections on gt1 ( Fig. 1E ). Body setation dirty white, conspicuous ( Fig. 2A, C ).

HEAD. Reticulate except clypeal region. Gena hollowed at mouth corner ( Fig. 2C ). Clypeus reticulate, not well delimited in upper part, but very well delimited laterally. Clypeal margin medially slightly produced and virtually straight ( Fig. 2C ). Mandibles very large, 3:3 ( Fig. 2C ). Toruli higher than centre of face. Scrobes fairly deep. Scape reaching level of vertex ( Fig. 2C ). Anelli transverse, all five funicular segments longer than wide, with moderately long setae. Claval apex with spicula ( Fig. 2G ). Relative measurements: head L: 26, W: 62, H: 50; eye H: 24, L: 19; POL: 10; OOL: 13; malar space: 21; scape L: 22, W: 4; pedicel L: 5.5, W: 3.5; pedicel plus flagellum L: 55; fu1 L: 6.5, W: 5; fu5 L: 5, W: 5; clava L (without spicula): 11, W: 6.5.

MESOSOMA. Pronotal collar uniformly reticulate, anterior margin rounded ( Fig. 2A ). Mesoscutum reticulate. Notauli clearly visible, occupying about half the length of mesoscutum. Scutellum as coarsely reticulate as mesoscutum, frenal area not delimited ( Fig. 2D ). Dorsellum very short, groovelike ( Fig. 2D ). Propodeal median area about as coarsely reticulate as scutellum, laterally delimited by sinuate plicae reaching nucha. Posterior part of nucha reticulate ( Fig. 2D ). Central part of prepectus finely reticulate. Mesopleuron finely reticulate except for smooth triangular area under hind wing base ( Fig. 2A ). Mesepisternum with small depression before mid coxa. Metapleuron finely reticulate, with small depression in lower part, separated from propodeal callus by deep groove. Fore wing ( Fig. 2F ) with basal cell, including basal vein, bare. Costal cell with two irregular lines of setae. Disc densely setose. Speculum moderate, reaching to proximal end of marginal vein. Admarginal setae on ventral side of wing in three irregular rows under marginal vein. Stigmal height much longer than minimum distance from stigma to PMV ( Fig. 2F ). Relative measurements: mesosoma L: 65, W: 43, H: 42; mesoscutum L: 23, W: 43; scutellum L: 25, W: 26; propodeum L: 15; fore wing L: 127, W: 57; MV: 30; SV: 14; PMV: 19; stigma height: 8; distance from stigma to PMV: 5.5.

METASOMA ( Fig. 2E ). Lanceolate, dorsally collapsing. Gt1 slightly produced posteriorly, none of the other gastral tergites enlarged or medially incised. Relative measurements: metasoma L: 100, W: 39; gt1 L: 22, W: 30; gt2 L: 6, W: 36; gt3 L: 12, W: 39; gt4 L: 10, W: 38; gt5 L: 15, W: 34; gt6 L: 18, W: 26; syntergum L: 11, W: 11.

Male allotype

Differs from the female holotype mainly in the following. Body length: 2.1 mm. Metasoma with pale spot in basal half. Antenna 11263, fu1 distinctly smaller than fu2. Flagellar setae longer, denser and more erect ( Fig. 2H ). Clava with very short spike-like terminal process ( Fig. 2H ). Metasoma oval, distinctly shorter than head plus mesosoma, distal tergites partly retracted. Metasoma L: 70, W: 32.

Variation

Females

Body length: 2.30–2.75 mm. MV 2.10–2.25 × SV. Metasoma length 2.5–3.5× width. The metasoma is slightly distorted in the holotype hence appearing wider than normal.

Distribution

South Africa.

Hosts

Unknown.

Figures

Fig. 2. Habritella mandibulata sp. nov. A, C, G. Holotype, ♀ (NHMUK). B, H. Allotype, ♂ (NHMUK). D–F. Paratype, ♀ (NHMUK). A. Habitus in lateral view. B. Habitus in lateral view. C. Head in frontal view. D. Detail of mesosoma in dorsal view. E. Metasoma in dorsal view. F. Fore wing in dorsal view. G. Antenna in lateral view.H. Antenna in lateral view (inset: detail of clava indicating the terminal process).

Fig. 1. Habritella africana sp. nov. A, C–G. Holotype, ♀ (NHMUK). B, H. Allotype, ♂ (NHMUK). A. Habitus in lateral view. B. Habitus in lateral view. C. Head in frontal view. D. Detail of mesosoma in dorsal view. E. Metasoma in dorsal view. F. Fore wing in dorsal view. G. Antenna in lateral view. H. Antenna in lateral view (inset: detail of clava indicating the terminal process).