Atopsyche cedroi, Rázuri-Gonzales & Holzenthal, 2025

Atopsyche cedroi sp. nov.

Figs 2 View Figure 2 , 3 View Figure 3

Type material.

Holotype. Peru • 1 ♂; Pasco, Yanachaga-Chemillén NP, Quebrada San Alberto at Refugio El Cedro ; 10.5452°S, 75.3578°W, 2421 m a. s. l.; 27 Aug. 2015; E. Rázuri, L. Figueroa and B. Portuguez leg.; light trap; UMSP 000220106 View Materials ( MUSM) GoogleMaps . Paratype. Peru • 1 ♀; same data as the holotype ( MUSM) GoogleMaps .

Diagnosis.

Atopsyche cedroi belongs to the bicolorata species group of Schmid (1989), characterized by having short inferior appendages and a broad notch apically on the first segment of these appendages. The second segment is reduced and inserted at the posterodorsal corner of or in the notch of the first segment. Among the species in this group, A. cedroi most closely resembles A. unicolorata Schmid, 1989 ( Bolivia). In both species, the first segment of the inferior appendage is apically notched, with the second segment inserted at the posterodorsal corner of the first segment. However, A. cedroi differs in several key features. The apical notch is broad, and the posteroventral corner is rectangular, while in A. unicolorata , the apical notch is narrower, and the posteroventral corner is digitate. Additionally, the second segment of the inferior appendage in A. cedroi is elongated and downturned, whereas in A. unicolorata , it is subtriangular and directed posterad. Although both species have a simple phallic apparatus, the base of the phallotheca is broad in A. cedroi and narrowly rounded in A. unicolorata . Finally, while the parapods are similarly shaped in both species, in A. cedroi , they are broader mesally and feature a pair of prominent spine-like setae on their lateral surface, which are absent in A. unicolorata .

Description.

Adult. Forewing length: male ( 9.5 mm, n = 1), female ( 13.5 mm, n = 1). Body and wings mostly pale brown, head and thorax dark brown. Forewing with scattered brown setae and longer, erect straw-colored setae along major longitudinal veins; with irregular patch of dark brown setae delimited by the posterior margin, the stem of Cu 1, the apical stem of 1 A + 2 A + 3 A, and the base of the wing (corresponds with darker wing membrane) and adjacent much smaller patch of black setae on fork V; pterostigma slightly coriaceous. Wing venation as in Fig. 2 View Figure 2 . Sterna III and IV without glands; sternum V with a pair of long, membranous glands; process on sternum VI slightly shorter than its segment, digitate, bearing short setae on basal third and spine-like setae on apical two-thirds; process on sternum VII very short, digitate, bare.

Male genitalia (Fig. 3 View Figure 3 ). Segment IX, in lateral view, subtriangular, slightly longer than high (Fig. 3 A View Figure 3 ). Parapod, in lateral view, shorter than inferior appendage, broader mesally, tapering towards apex, directed slightly posteroventrad, with setae on apical half and a pair of peg-like setae on mesoventral surface, apex rounded (Fig. 3 A View Figure 3 ); in dorsal view, digitate, lateral margin slightly sinuous, mesal margin straight, with setae apically, apex rounded (Fig. 3 B View Figure 3 ). Filipod digitate, shorter than parapods, setose, apex acute (Fig. 3 A View Figure 3 ). Preanal appendage short, rounded, setose (Fig. 3 A View Figure 3 ). First segment of inferior appendage, in lateral view, roughly quadrangular, ventral margin slightly sinuous, dorsal margin slightly convex apically, posteroventral corner produced into quadrate process, posterodorsal corner produced posterad, broadly notched apically, with long setae on ventral margin, short setae on lateral surface, and pair of peg-like setae subapically on mesal surface (three peg-like setae on opposite side) (Fig. 3 A View Figure 3 ); in ventral view, mitten-shaped, setose, lateral margin convex, mesal margin slightly sinuous with a quadrate process medially (Fig. 3 C View Figure 3 ); second segment of inferior appendage, in lateral view, digitate, with a few very short setae basally, slightly curved posteroventrad (Fig. 3 A View Figure 3 ); in ventral view, digitate, slightly curved mesad, apex narrowly rounded (Fig. 3 C View Figure 3 ). Proctiger, in lateral view, broadly widened apically, with truncate apical margin, covered with small setae (visible at 100 ×) (Fig. 3 A View Figure 3 ); in dorsal view, tapering apically. Phallic apparatus simple; phallotheca broadly rounded basally, phallic apodeme indiscernible; with ventral process articulating with inferior appendages, broad, constricted mesally; ventrolateral branches of phallotheca absent; dorsal process of phallotheca absent; posterior section of the phallotheca, in lateral view, broad basally, tapering towards apex, directed posterad, apex acute, membranous apically (Fig. 3 D View Figure 3 ); in dorsal view, with a notch mesally, apex directed posterad (Fig. 3 E View Figure 3 ); phallic spine elongate, stout, with a slight curvature near the base (Fig. 3 D View Figure 3 ); in dorsal view, with four erect setae on small, lateral bulges, apex acute (Fig. 3 E View Figure 3 ).

Distribution.

Peru: Pasco Department.

Etymology.

This new species is named after the locality where the type was collected, Refugio El Cedro (Yanachaga-Chemillén NP, Pasco Department, Peru).