Taeniogonalos eurysoma Chen & van Achterberg, 2020

Femi, Ezhuthupallickal Benny, Ranjith, Avunjikkattu Parambil & Priyadarsanan, Dharma Rajan, 2024, Additions to the trigonalyid (Hymenoptera: Trigonalyidae) fauna of India with the description of a new species from south India, Zootaxa 5419 (2), pp. 265-274 : 269-272

Taeniogonalos eurysoma Chen & van Achterberg, 2020

( Figs. 3–4 )

Material examined. Male, India: Arunachal Pradesh, Yemsing , 28°7'39.72" N and 94°57'50.8" E 1259 m.a.s.l., 28.iv.2022, coll. A.P. Ranjith ( AIMB) .

Diagnosis. Supra-antennal elevations medium-sized, about 0.4 × as long as scape (approximately 0.2 × as long as scape in female) and their outer side oblique ( Fig. 3C ); mandibles ( Fig. 3C ) yellow except apical margin (black in female with a basal yellow patch); occipital carina narrow, non lamelliform, smooth ( Fig. 3D ); head anteriorly and posteriorly, and pronotum laterally entirely black ( Figs 3 B, D–E ); vertex reticulate-punctate behind stemmaticum and near eyes, becoming spaced punctate (with interspaces much wider than width of punctures posteriorly) ( Fig. 3D ); mesoscutum coarsely rugose punctate (coarsely sculptured in female) ( Fig. 3F ), with yellow spot on the postero-lateral margin (absent in female); notauli wide and crenulate ( Fig. 3F ); scutellum similarly sculptured as mesoscutum, convex laterally and shallowly concave medially ( Fig. 3F ); metanotum slightly convex, rugose, heavily setose, ivory band of metanotum continuous (discontinuous and less setose in female) ( Fig. 4B ); posterior propodeal carina distinctly arched, narrow lamelliform, foramen comparatively narrow; posterior margin of tergites, 1st and 2nd sternites with yellow stripes (ivory in female) ( Figs 4C–D ); first metasomal tergite 1.1 × as wide as long (0.4 × as long as apically wide in female), yellow apical band of second metasomal tergite laterally widened and narrowed medially, black spot in the middle of yellow posterior band of second tergite narrow (very wide in female), second sternite slightly convex ( Fig. 4D ); third sternite without depression ( Fig. 4D ); Fore wing with length of vein 1-M 1.3 × as long as vein 1-SR (1.1 × in female), second submarginal cell 1.4 × as long as third cell (1.3 × in female).

Description. Male. length of body 6.75 mm; fore wing 6.1 mm.

Head. Head 1.8, 1.5 × as wide as long anteriorly (except mandibles) and dorsally respectively; antenna with 19 flagellomeres ( Fig. 3A ); tyloids present on flagellomeres 8–13 ( Fig. 4A ); frons ( Fig. 3B ) reticulate-punctate posteriorly; vertex reticulate- punctate behind stemmaticum and near eyes, becoming spaced punctate posteriorly ( Fig. 3D ); OOD 2.6 × POD ( Fig. 3D ); OOD 3.0 × OD; occipital carina narrow, non-lamelliform, smooth ( Fig. 2D ); supra-antennal elevation medium-sized, about 0.4 × as long as scape ( Fig. 3C ), outer margin oblique; temple largely smooth with few punctures at orbita and densely punctate near mandible ( Fig. 3A ); clypeus distinctly concave and thick medio-ventrally ( Fig. 3C ). eye in dorsal view 1.1 × as wide as temple; interocular distance at middle of face 4.3 × distance between antennal toruli.

Mesosoma. Mesosoma 1.4 × as long as high ( Fig. 3E ); mesopleuron largely punctate-rugose, becoming densely punctate posteriorly; transverse mesopleural groove narrow, crenulate ( Fig. 3E ); notauli wide, deep and coarsely crenulate ( Fig. 3F ); middle lobe of mesoscutum transversely punctate-rugose, lateral lobes densely punctate anteriorly, becoming punctate-rugose posteriorly ( Fig. 3F ); scutellar sulcus complete, moderately narrow and crenulate; scutellum coarsely rugose, convex laterally and shallowly concave medially, anteriorly distinctly above level of mesoscutum; metanotum slightly convex, highly setose ( Fig. 3F ); propodeum largely punctate-rugose, becoming smooth posteriorly ( Fig. 4B ); posterior propodeal carina distinctly arched, narrow lamelliform, foramen comparatively narrow and as high as wide basally.

Wings. Fore wing with length of vein 1-M 1.3 × as long as vein 1-SR, vein 1-M curved and vein 1-SR straight; subdiscal and discal cells less setose ( Fig. 4F ); second submarginal cell sessile anteriorly, 1.4 × as long as third cell, connecting with discal cell by forming a vertical vein.

Metasoma. First metasomal tergite 1.1 × as wide as long, smooth and with shallow but wide depression medially ( Fig. 4C ); second tergite narrowly smooth and shiny medially, moderately punctate laterally; following tergites moderately punctate ( Fig. 4C ), black spot in the middle of yellow posterior band of second tergite narrow; second sternite slightly convex, densely punctate ( Fig. 4D ); third sternite without depression, densely punctate; following sternites densely punctate; visible part of third sternite 0.2 × as long as second sternite.

Colour. Same as female except mandibles largely yellow with apical black margin, posterior margin of tergites, 1st and 2nd sternites with yellow stripes; yellow spot on the postero-lateral margin of mesoscutum and a more or less continuous ivory band on metanotum.

Biology. Unknown

Distribution. India (Arunachal Pradesh).

Figures

FIGURE 2. Taeniogonalos deepaki Femi & Ranjith sp. nov., holotype, femaleA) propodeum, dorsal view; B) metasoma, dorsal view; C) metasoma, lateral view; D) metasoma, ventral view; E) wings.

FIGURE 3. Taeniogonalos eurysoma Chen & van Achterberg, 2020, male A) habitus, lateral view; B) head, anterior view; C) head, antero-ventral view; D) head, dorsal view; E) mesosoma, lateral view; F) mesosoma, dorsal view.

FIGURE 4. Taeniogonalos eurysoma Chen & vanAchterberg, 2020, male A) tyloids; B) propodeum, dorsal view; C) metasoma, dorsal view; D) metasoma, ventral view; E) apical metasomal segments, dorsal view; F) fore wing.