Cremnomymar nahuelbutae Triapitsyn, 2024

Triapitsyn, Serguei V., 2024, Review of Cremnomymar species (Hymenoptera: Mymaridae) in mainland South America, with a new generic synonymy, Zootaxa 5463 (1), pp. 25-46 : 33

Cremnomymar nahuelbutae Triapitsyn , sp. n.

( Figs 15–22 )

Type material. Holotype female [ MNNC], on slide labeled as in Fig. 15 : CHILE. Araucanía: Parque Nacional Nahuelbuta , 37°48’58’’S 73°00’36’’W, 1323 m, 9–10.ii.2005, UCR Expedition (J.M. Heraty et al.), yellow pan trap in mature Nothofagus forest . Paratype: CHILE. Araucanía: Parque Nacional Nahuelbuta, Centro de Informaciones , 37°49’S 73°00’W, 8.xii.1994, S.L. Heydon, E. Arias [1 ♀ on slide, UCDC] .

Diagnosis. Females of this species are distinguished from those of all mainland South American species of Cremnomymar by the smooth scutellum (with reticulate mesh-like sculpture in other species).

Description. FEMALE (holotype [not photographed prior to slide-mounting]). Head and mesosoma dark brown, petiole light brown, gaster brown; scape and pedicel light brown, F1–F5 brown, F6 and clava dark brown; legs light brown except procoxa dark brown. Head ( Fig. 17 ) a little wider than high; face with fine, inconspicuous mesh-like sculpture above toruli. Antenna ( Fig. 16 ) with scape, excluding short radicle (fused with the rest of scape), 4.0× as long as wide; pedicel longer than any funicle segment (except F2) and 2.1× as long as wide; F1 the shortest and F2 the longest funicle segments, F6 the widest funicle segment, length to width ratios of funicle segments as follows: F1: 3.1, F2: 5.5; F3: 4.0; F4: 2.4; F5: 2.2; F6: 2.1; F6 with 1 mps; clava 2.9× as long as wide, as long as the 3 preceding segments, with all mps but one in apical half. Mesosoma ( Fig. 19 ) about 1.6× as long as wide; pronotum without distinct sculpture; mesoscutum with reticulate mesh-like sculpture; prosternum as in Fig. 18 ; mesoscutum much wider than long, with notauli distinct and complete; scutellum about as long as mesoscutum; propodeum mostly smooth, with median carina complete. Fore wing ( Fig. 21 ) 3.6× as long as wide; venation with apical process about as long as marginal + stigmal vein; disc with 2 transverse bands beyond venation, the proximal band narrow and the distal one wide, densely setose beyond venation, discal setae modified only on the dark bands; proximal (short) fringe setae on anterior margin thickened, subapical (long) slightly thickened while apical fringe setae normal; the longest marginal seta about equal to greatest width of wing. Hind wing ( Fig. 22 ) about 25× as long as wide, with disc almost hyaline (slightly infumate subapically) and sparsely setose beyond venation; the longest marginal seta 7.1× greatest width of wing. Metacoxa smooth. Petiole ( Fig. 20 ) cylindrical, 3.9× as long as wide, with inconspicuous wrinkles dorsally. Ovipositor about 0.8 length of gaster ( Fig. 20 ), barely exserted beyond gastral apex, and about 1.1× length of metatibia.

Measurements of the holotype (µm). Mesosoma: 303; petiole: 124; gaster: 357; ovipositor: 300. Scape (excluding radicle): 97; pedicel: 63; F1: 33; F2: 67; F3: 48; F4: 37; F5: 37; F6: 52; clava: 133. Fore wing: 867:239; longest marginal seta: 242. Hind wing: 606:24; longest marginal seta: 170.

Variation (paratype). Scape, excluding radicle, 3.7× as long as wide, clava 3.1× as long as wide; fore wing 4.1× as long as wide, the longest marginal seta 1.3× greatest width of wing; hind wing about 28× as long as wide, the longest marginal seta 8.3× greatest width of wing.

MALE. Unknown.

Distribution. Chile.

Etymology. This species is named after Nahuelbuta National Park (Parque Nacional Nahuelbuta) where the two type specimens were collected.

Figures

FIGURES 15–20. Cremnomymar nahuelbutae sp. n., female (holotype). 15. Slide. 16. Antenna. 17. Head, frontal. 18. Prosternum (seen through mesosoma). 19. Mesosoma, dorsal. 20. Metasoma, lateral.

FIGURES 21–24. 21–22. Cremnomymar nahuelbutae sp. n., female (holotype). 21. Fore wing. 22. Hind wing. 23–24. Cremnomymar sagittifer, female (paratype of Parapolynema sagittifer, José C. Paz, Buenos Aires, Argentina). 23. Slide. 24. Habitus.