Neotrichia baja Ramírez-Carmona & Thomson, 2025

Neotrichia baja Ramírez-Carmona & Thomson sp. nov.

Fig. 2 View Figure 2

Diagnosis.

This species is placed in the canixa group based on the sclerotized horns of segment X, forked bracteoles, and bifid inferior appendages outlined in Keth et al. (2015). This species is most similar to Neotrichia canixa ( Mosely, 1937) . The phallus is very similar, bearing a long paramere, and ending in two sclerotized hooks (Fig. 2 D, E View Figure 2 ). However, the anterolateral margin of segment IX is convex (Fig. 2 A View Figure 2 ), while it is tapered in N. canixa ; the apicolateral projection is serrate and digitate (Fig. 2 A, B View Figure 2 ), while it is setose in N. canixa ; and the bracteole is sparsely setose, with only long apical seta in N. canixa . Also, the horns in segment X are wider and thicker than those of N. canixa (Fig. 2 B View Figure 2 ).

Description.

Male. Forewing length 1.7–2.1 mm ( N = 4). Head unmodified, with 3 ocelli; antennae unmodified. Tibial spur formula 0, 2, 3. Sternum VII and VIII unmodified, annular. Genitalia. Segment IX anterior margin convex, in lateral view, with prominent lateral seta, segment fused dorsally with tergum X; apicolateral projection digitate, serrate; bifid bracteole with upper and lower arms slender and digitate, upper arm sparsely setose with prominent apical seta in ventral view, lower arm sparsely setose with prominent apical seta (Fig. 2 A View Figure 2 ). Tergum X extended posteriorly, in dorsal view approximately pentagonal with apical emargination; robust sclerotized horns curving mesally (Fig. 2 B View Figure 2 ). Subgenital plate with hooked apex, dorsally with pair of preapical setae, in lateral view basally membranous (Fig. 2 A, B View Figure 2 ). Inferior appendage bifid, upper arm setose, lower arm with single apical seta (Fig. 2 C View Figure 2 ). Phallus tubular with medial constriction, elongate paramere arising from constriction and extending to apex; apex with pair of slightly sclerotized hooks (Fig. 2 D, E View Figure 2 ).

Material examined.

Holotype: Mexico • ♂; Baja California Sur: Mulegé, San José de Magdalena River ; 27°03.717'N, 112°14.020'W; el. 211 m; 06.vii.2022; A. Contreras, A. Gómez, Y. Marquez, A. Ramírez & M. Ramírez leg.; UV light (in alcohol) ( UMSP 000281124 View Materials ) GoogleMaps . Paratypes: Mexico • 2 ♂; Baja California Sur, Los Cabos, Sierra de la Laguna, Rancho Ecológico Sol de Mayo; La Zorra Canyon waterfall ; 23°29.829'N, 109°47.592'W; el. 232 m; 14.viii.2021; R. Barba, A. Contreras, M. Luna, Y. Marquez & M. Ramírez leg.; UV light (in alcohol) ( CNIN) GoogleMaps • 1 ♂ Baja California Sur, Los Cabos, Sierra de la Laguna, Rancho Ecológico Sol de Mayo; La Zorra Canyon waterfall ; 23°29.890'N, 109°47.592'W; el. 232 m; 11.vii.2022; A. Contreras, A. Gómez, Y. Marquez, A. Ramírez & M. Ramírez leg.; UV light (in alcohol) ( UMSP) GoogleMaps .

Etymology.

Named for the Baja California peninsula, where the specimens were collected.