Nectopsyche froehlichi, Assunção & Quinteiro, 2023

Assunção, Otávio Trindade & Quinteiro, Fábio Batagini, 2023, Two new species and new records of the genus Nectopsyche Müller, 1879 (Trichoptera: Leptoceridae) from Pará state, Brazil, Revista Brasileira de Entomologia (e 20230049) 67, pp. 1-9 : 5-6

Nectopsyche froehlichi , new species urn:lsid:zoobank.org:act:18D932BD-56F7-40F5-B1E8-DFE5D7A75FF3

( Figures 2; 5A–G ; 6A–C)

Diagnosis. Nectopsyche froehlichi n. sp. is similar toN. diminuta andN. separata ( Banks, 1920) due to the presence of a short and narrow segment IX ( Figs. 5D ; 6A), elongate preanal appendage, slightly bent ventrally ( Figs. 5E, D ; 6A, B), the tergum X thin, with acute apex ( Figs. 5D ; 6A), the presence of periphalic process ( Figs. 5G ; 6A) and especially due to the slightly sinuous inferior appendage with somewhat rounded apex ( Figs.5D ; 6A). However, the presence of a strongly constricted basal half of the preanal appendage ( Figs. 5D ; 6A), the periphalic process with a distinctly enlarged and wrinkled apex ( Figs. 5G ; 6A), and the absence of a setose basoventral lobe on the inferior appendage ( Figs. 5D ; 6A) are very distinctive characteristics of N. froehlichi n. sp.

Description. Adult male (alcohol). Length of forewing 5.5–6.5 mm (mean 5.7 mm,n = 5).Head pale-yellow,with small dark brown setae near the eyes; antennae pale-yellow,scape stout, with short, dark brown setae; labial and maxillary palps pale brown; eyes large,black,width around0.3x interocular distance. Thorax pale-yellow, with few dorsal setae, two or three pairs of setal warts;legs yellow; forewing hyaline,light brown setae over wing, yellow and dark brown scales distally (specimens preserved in alcohol; Fig. 5A ); hind wing hyaline ( Fig. 5B ). Male genitalia. Segment abdominal IX narrow, rectangular, about 3x as high as long,posterolateral margin ventrally produced, with acute apex in dorsal view, rounded in lateral view, setose ( Figs. 5D ; 6A); without mesodorsal protuberance. Preanal appendage setose, elongate, cylindrical, strongly enlarged distally, with apical setae. Tergum X lateral process narrow, rounded apex, with short apical and subapical setae, dorsal view ( Figs. 5E ; 6B, C). Inferior appendage cylindrical, constricted at midlength,with irregular margin at dorsal distal 1/3rd and along ventral length, prominent long ventral and apical setae ( Figs 5D, F ; 6A), with ventral rounded hump at base,projected ventrally,apex slightly enlarged, ventral view ( Figs.5F ; 6C); posterolateral lobe rounded, flat in ventral view ( Figs. 5F ; 6B), basoventral lobe absent. Phallic apparatus sclerotized,distinct periphalic process,with apex curved, globose, rugose; phallobase narrow basally, gradually widening along its length; endotheca membranous, distended; one phalotremal sclerite present, horseshoe-shaped ( Figs. 5G ; 6C).

Material examined. Holotype. Male : Brazil: Pará : Barcarena, Mucuruçá basin, 01º34’24”S, 48º42’35”W, alt 24 m, 19. ii.19, light trap, Andrade, A.L, Bastos, R.C, Rocha, T.S, Cruz, G.M ( MZSP) . Paratypes: same data as holotype, except 01º34’43”S, 48º41’35”W, alt 18 m, 1 male ( MPEG); same, except 01º34’10”S, 48º41’25”W, alt 24 m, 3 males ( UFBA) .

Etymology. The species name honors Prof.Dr. Claudio G. Froehlich, FBQ’s first advisor in Faculdade e Filosofia, Ciências e Letras (Universidade de São Paulo), for his outstanding contributions to aquatic insect studies, especially in the Neotropics.

Taxonomic notes: The holotype and paratypes of this species are stored in alcohol,hence scales and setae color are not fully addressed here. Although some wing setae and scales were lost, color differences may be observed between N. froehlichi n. sp. and the similar species, N. separata and N. diminuta . They act complementarily to the genital characters previously pointed out. Nectopsyche froehlichi n. sp. presents darker scales on the forewing than inN. separata . The scales are mostly brown or dark brown in the new species, while they are described as mostly white, with some black strips on veins, black spots in the wings’ apical third, and three yellowish oblique bands ( Banks, 1920) in N. separata . The scales on the forewing of N. froehlichi n. sp. are similar to those in N. diminuta (considering the descriptions ofN. diminuta inBanks (1920) and pictures provided by Flint (1974)). Both share long scale stripes in different tones of brown interspaced by narrow white stripes.

Figures

Figure 5 Nectopsyche froehlichi, new species. Male. A, photo of the forewing of alcohol preserved specimen; B, forewing; C, hind wing; D, genitalia, lateral view; E, genitalia, dorsal view; F, inferior appendage, ventral view; G, phallic apparatus, lateral view.