Gastrotrypes carinatus Sunita et Rajmohana, 2022

Sunita, Patra, Rajmohana, Keloth, Manoj, Kandoth & Anjana, Madathil, 2022, Two New Species Of The Rare Genus Gastrotrypes Brues (Hymenoptera: Platygastridae) From India, Acta Zoologica Academiae Scientiarum Hungaricae 68 (3), pp. 239-246 : 242-244

Gastrotrypes carinatus Sunita et Rajmohana sp. n.

( Figs 7–11 )

Material examined: Holotype (Reg. No. 27898/H3), female on card labelled INDIA: Kerala, Kasaragod, Cheemeni (12°14.501’, 75°14.216’); 08.01.17, coll. Manoj K. Paratype (Reg. No. 27899/H3): 1 female, with the same collection data as that of the holotype .

Diagnosis: Frons, vertex and occiput finely reticulate. Hyperoccipital carina present; OOL subequal to OD; A7–A10 nearly subequal in length; T5 elongate,>2.5× as long as wide.

Description: Female (holotype) body length = 0.90 mm.

Body shiny black; A1–A2 and legs except coxae, yellowish brown; coxae dark brown; A3–A10 brown; last segment of tarsi slightly darkened.

Head: FCI = 1.1, LCI = 1.5 ( Fig. 9 ); head 1.1× as wide as mesosoma, rounded. Frons, gena, vertex and occiput finely reticulate, sculpture effaced on lower frons ( Fig. 10 ); inner orbits bordered by a row of sparse white setae; upper and lower frons with sparse setae; hyperoccipital carina distinct; occiput without any sculpture below hyperoccipital carina, but with a concave carina medially; eyes with extremely sparse micropilosity, visible only in high magnifications; ( Fig. 9 ); ocellar triangle finely reticulate; OOL:OD:POL:LOL = 2:2:15:6; OOL subequal to OD; IOS 1.3× eye height and 0.68 of head width; antenna with 10 segments; proportion of length to width of antennomeres A1–A10 being 14:3; 3:2; 0.45:0.7; 4.9:2.4; 3.66:2.1; 1:0.8; 4.2:2.8; 4.2:2.8; 4.2:2.8; 4.9:2.45 respectively, A7 to A9 subequal, 1.5× as long as wide; ( Fig. 11 ). A10, not as wide as A9, 1.16× as long as A9.

Mesosoma: Smooth and shiny; 1.5× as long as wide; lateral pronotal area with a few white scattered setae; mesoscutum without notauli, sparsely setose, with a small patch of reticulation on either side anterolaterally; 0.9× as long as wide; hind margin with a mid-lobe extending 0.4× of mesoscutellum (Fig. 8,10); median lobe as long as wide; pronotum visible as a wide zone, not angular at sides; cervical area with transverse irregular striae; pronotum smooth and shiny, setose; scutoscutellar sulcus not distinct; mesoscutellum slightly wider than long, densely setose; median and lateral propodeal carina slightly raised; anterolateral propodeal area coarse, posterolateral propodeal area densely setose; lateral pronotal area with a few white scattered setae; mesopleura and anterior margin of metapleura smooth, rest with dense yellow recumbent setae ( Fig. 11 ). Forewing 0.82× length of body and 2.2× longer than wide, with fine and dense microtrichia; marginal cilia well developed, 0.25× forewing width ( Fig. 7 ), hindwing marginal fringe 0.6× as maximum width of wing.

Metasoma: 2.2× as long as wide and 0.9× of head and mesosoma combined; T5 elongate and tubular; length and width of T1–T5 being 10: 24; 38: 44; 11:30; 12: 15 and 27:11 respectively; T1 with one median carina and two adpressed submedian carinae; T2 submedially striate longitudinally at its anterior one-fourth, rest smooth; T3 and T4 smooth and shiny; T5 2.5× as long as wide with white setae; basal half of T5 densely and finely striolate ( Fig. 10 ).

Male: Unknown.

Etymology: The species is named carinatus , after their distinct hyperoccipital carina as well as the emarginated carina below it.

Comments: Gastrotrypes carinatus sp. n. can be easily distinguished from other species by the presence of a median longitudinal carina on T1. The species resembles G. manii in the presence of a hyperoccipital carina and also an elongate T5. However, the finely reticulate sculpture on the frons, vertex and occiput in G. carinatus (smooth in G. manii ), and a combination of several characters like differences in length to width ratio of the claval segments and much smaller marginal fringe of wings serve to separate the two species.

Figures

Figs 7–11. Gastrotrypes carinatus Rajmohana et Sunita sp. n.: 7 = habitus; 8 = head and anterior mesosoma, dorsal view; 9 = head frontal view; 10 = habitus, dorsal view; 11 = antenna, head and mesosoma in lateral view