Grotiusomyia septentrionalis, Hansson, 2023

Hansson, Christer, 2023, Review of Grotiusomyia Girault (Chalcidoidea: Eulophidae), an exclusively New World genus, including 17 new species, Zootaxa 5278 (1), pp. 39-77 : 59-76

Grotiusomyia septentrionalis sp. nov.

Figs 17 , 45 , 71, 72 , 93 , 110

Diagnosis. Mandibles yellowish-brown with base dark brown, with a row of small teeth at apex (as in Fig 112 ); antenna dark brown, flagellum 0.6× as long as width of mesoscutum, F4 0.7× as long as wide, apex of clava pointed ( Figs 17 , 71 ); frons between scrobes and eyes and vertex with strong reticulation ( Figs 93 , 110 ); occipital margin with an edge behind ocellar triangle ( Fig. 93 ); mesoscutum and mesoscutellum with same colour ( Fig. 45 ); mesoscutellum convex and with weaker reticulation than mesoscutum; dorsellum convex, smooth and shiny, posterior margin ±smoothly curved with medio-posterior part slightly protruding; fore wing with four setae in apico-dorsal part of costal cell, completely hyaline ( Fig. 17 ); fore and mid coxae black ( Fig. 17 ); gaster ( Fig. 45 ) 1.7× as long as wide; Gt 1 0.4× as long as length of gaster, dorsal surface smooth and shiny, posterior margin straight; Gt 6 0.1× as long as length of gaster with anterior part 1.6× as wide as width of posterior part, posterior margin straight with sharp edge.

Description (female holotype). Length 1.9 mm. Frons between scrobes and eyes and vertex with strong reticulation, scrobes smooth. Mandibles with a row of small teeth at apex. Occipital margin with an edge behind ocellar triangle. Dorsellum convex, smooth and shiny, posterior margin ±smoothly curved with medio-posterior part slightly protruding. Propodeal callus with 20 setae. Fore wing with seven setae on dorsal surface of submarginal vein; with 12 admarginal setae; costal cell with 12 setae in a single row on ventral surface, apico-dorsal margin with four setae; speculum large and closed below. Gaster ovate; Gt 1 smooth and shiny, remaining tergites with weak reticulation; Gt 1 and Gt 6 with posterior margin straight.

Colour. Head black and shiny. Mandibles yellowish-brown with base dark brown. Entire antenna dark brown. Mesosoma black and shiny. Coxae black and shiny, remaining parts of legs dark brown. Gaster black and shiny.

Relative measurements: head length, dorsal view 19; head length, frontal view 34; head width 44.5; POL 12; OOL 5.5; mouth width 18; malar space 8.5; eye length 21; lateral ocellus diameter 4; scape length 16.5; scape width 4; pedicel length 5; pedicel width. dorsal view 3.5; flagellum length 27.5; F1 length 5; F1 width 4.5; F2 length 4; F2 width 5; F3 length 4; F3 width 5.5; F4 length 4; F4 width 6; clava length 11; clava width 6; pronotum length 19; pronotum width 35; mesosoma length 65; mesosoma width 44; midlobe of mesoscutum length 19; mesoscutellum length 22; mesoscutellum width 22; propodeum length 12; hind tibia length 39; hind tibial spur1 length 4.5; hind tibial spur2 length 3; hind tarsus length 29; hind basitarsus length 9; fore wing length 118; fore wing width 51; costal cell length 38; costal cell width 4; marginal vein length 32; postmarginal vein length 17.5; stigmal vein length 11.5; Gt 1 length 25; Gt 6 length 10; Gt 6 width at base 26; Gt 6 width at apex 16; gaster length 69; gaster width 40.

Variation. Length of body 1.7–2.0 mm. Costal cell with 3–4 setae in apico-dorsal part. Propodeal callus with 19–22 setae. Mesosoma in paratypes with very weak metallic blue or golden tinges.

Male. Length 1.9 mm. Very similar to the female.

Relative measurements: head length, dorsal view 19; head width 43; eye length 19.5; scape length 17.5; scape width 4.5; flagellum length 28; F1 length 5.5; F1 width 4.5; F2 length 4.5; F2 width 5; F3 length 4; F3 width 5.5; F4 length 4; F4 width 5.5; clava length 9.5; clava width 5.5; Gt 1 length 25; gaster length 57; gaster width 38.

Distribution. Canada (Ontario, Quebec, Saskatchewan).

Hosts. Reared from an unidentified leaf roller on Populus sp.

Etymology. From the Latin septentrionalis = northern, referring to the northern distribution of this species.

Material. Holotype female: CANADA, Ontario, Ottawa , Nepean , 12.vi.1989, Z. Bouček ( NHMUK). Paratypes (2♀ 1♁, in NHMUK): 1♀ CANADA, Saskatchewan, White Fox , 1.vii.1941, O. Peck; 1♀ 1♁ CANADA, Quebec, Parke Reserve , Belleville Lab., 27.iii.1944, ex leaf roller on Poplar.

Figures

FIGURES 13–18. Grotiusomyia spp. nov., body in lateral view, females; 13 G. noyesi, paratype; 14 G. phalaros, paratype; 15 G. pilosa, paratype; 16 G. reticulata, paratype; 17 G. septentrionalis, holotype; 18 G. rubii, holotype.

FIGURES 44–50. Grotiusomyia spp.; 44–45. Body in dorsal view; 44 G. rubii sp. nov., female holotype; 45 G. septentrionalis sp. nov., female paratype; 46–50. Head+antenna in lateral view; 46 G. flavicornis Girault, female non-type; 47–48. G. nigricans, non-types; 47 female; 48 male; 49–50. G. albiclava sp. nov.; 49 female paratype; 50 male paratype.

FIGURES 71–75. Grotiusomyia spp. nov.; 71–72. G. septentrionalis, head+antenna in lateral view; 71 female holotype; 72 male paratype; 73 G. pilosa, base of fore wing, female holotype; 74–75. G. annesmithae, female paratype; 74 head in frontal view; 75 mesosoma in dorsal view.

FIGURES 92–102. Grotiusomyia spp., females; 92–93. Vertex; 92 G. rubii sp. nov., holotype; 93 G. septentrionalis sp. nov., holotype; 94–102. Head in frontal view; 94 G. nigricans (Howard), non-type specimen; 95 G. albiclava sp. nov., holotype; 96 G. annesmithae sp. nov., holotype; 97 G. azofeifai sp. nov., paratype; 98 G. flavimacula sp. nov., holotype; 99 G. guanacastensis sp. nov., paratype; 100 G. hansoni sp. nov., holotype; 101 G. lascrucensis sp. nov., holotype; 102 G. jimenezi sp. nov., holotype.

FIGURES 103–112. Grotiusomyia spp. nov., females; 103–110. Head in frontal view; 103 G. leucaena, paratype; 104 G. nicoyae, paratype; 105 G. noyesi, holotype; 106 G. phalaros, paratype; 107 G. pilosa, paratype; 108 G. reticulata, paratype; 109 G. rubii, holotype; 110 G. septentrionalis, paratype; 111–112. Mandibles; 111 G. phalaros, paratype; 112 G. lascrucensis, holotype.