Ochrotrichia ducke, Moreno & Desidério & Pes & Hamada, 2021

Moreno, Lucas, Desidério, Gleison Robson, Pes, Ana Maria & Hamada, Neusa, 2021, Novelties in centralAmazonian microcaddisflies: Three new species of Ochrotrichia Mosely (Trichoptera: Hydroptilidae), Zootaxa 5060 (2), pp. 250-264 : 260-262

Ochrotrichia ducke sp. nov.

( Figures 8A–8C , 9A, 9B , 10A–10H )

Material examined. Holotype male ( INPA). BRAZIL: Amazonas : Manaus , Reserva Ducke, Igarapé do Ipiranga, 02°58’53.6”S, 59°54’24.4”W, el. 95 m a.s.l., 07–19.iv.2017, A.M.O. Pes, G. R. Desidério, P. Barcelos-Silva legs., Malaise trap.

Paratypes: Same data as holotype, except 5 males ( INPA) ; same data, except Igarapé Barro Branco, 02°55’48.95”S, 59°58’26.14”W, el. 69 m, 1 male ( INPA), 15–25.x.2018 , E.B. Pereira, G. R . Desidério legs., Malaise trap.

Diagnosis. The new species has the inferior appendages each with a series of long peg-like setae subapicomesally and a row of long, thin spines mesally at mid-length. Segment IX has a pointed flap directed ventrad on the posterolateral margin in lateral view; tergum X has an inverted Y-shaped apodeme arising from midlength in dorsal view; and the phallus has a triangular subapicolateral process. Ochrotrichia ducke sp. nov. is most similar to O. concha based on the convex basoventral curvature and the row of mesal spines on the internal faces of the inferior appendages. These two species can be distinguished by tergum X, which is comparatively simple in O. ducke sp. nov., but in O. concha has two plates on the left side and a long, slightly sinuous process on the right side.

Description. Male adult. Total body length 2.03–2.53 mm (mean = 2.38, SD = 0.20, n = 5); length of each forewing 1.78–2.13 mm (mean = 2.09, SD = 0.18, n = 5). General color brown (in alcohol) ( Fig. 8A ). Head with three ocelli; dorsally with two pairs of setal warts; ocellar pair closely appressed on midline, each triangular; posterolateral pair large, ellipsoid ( Fig. 8B ). Metascutellum subpentagonal ( Fig. 8C ). Forewings each with forks I, II, and III present; M 1 vein partially fused with basal 1/3 of R 5 vein and ending on wing margin almost at level of end of R 5; M 2 vein completely independent of R 4+5 and ending on wing margin almost at level of end of R 4; M 1+2 and M 3+4 veins branching from each other near origin of independent R 3 vein; r-m, m-cu, cu, and cu-a crossveins closely aligned near r crossvein before middle of wing, another r-m crossvein in middle of wing ( Fig. 9A ). Hind wings each with forks II and V present; C with row of short spines on proximal region; R 2+3 vein originating midway between origins of R 1 and R 4+5; M 1+2 vein not fused to R veins, branching from M 3+4 vein near middle of wing; and Cu 1 vein subdivided apically into 2 branches ( Fig. 9B ). Tibial spur formula 0, 3, 4. Abdominal sternum VII with pointed mesoventral process ( Fig. 10B ).

Genitalia. Segment IX in lateral view with upper anterolateral margin slightly concave, mesoventrally produced; upper posterolateral margins produced posterad, with folded cleft at mid-height forming two lobes ( Figs 10A 1 , 10C ); in dorsal view, with deeply subquadrangular cleft posteriorly ( Fig. 10E ); in ventral view, subrectangular ( Figs 10G, 10H ). Tergum X in lateral view long, surpassing inferior appendages, with slight ventral projection at midlength and with obliquely truncate apex ( Figs 10A 1 , 10A 2 ); in dorsal view, not divided, goblet-shaped, slightly sclerotized base with inverted, Y-shaped apodeme arising from midlength ( Fig. 10E ); apex semi-membranous, with broadly V-shaped concavity and lateral, rounded lobes ( Fig. 10E ). Inferior appendages in lateral view S-shaped, excavated posteroventrally; 2× as long as wide, apically obliquely rounded ( Figs 10A 1 , 10C ); in dorsal view, not surpassing tergum X, with inner surfaces bearing numerous dark, peg-like setae grouped subapically ( Fig. 10E ); in ventral view, each with row of long, slender mesal spines on inner margin ( Figs 10G, 10H ). Phallus simple, tubular, elongate, 2.7× longer than inferior appendages, thread-like, with triangular, subapicolateral process ( Figs 10D, 10F, 10H ).

Female and immature stages. Unknown.

Distribution. BRAZIL (Amazon: Amazonas state) ( Fig. 1 ).

Etymology. The new species name is a noun in apposition, with unchanging gender, referring to the Ducke Forest Reserve, where the type material was collected.

Figures

FIGURE 1. Distribution of Brazilian species of Ochrotrichia (Trichoptera: Hydroptilidae).

FIGURE 2. Ochrotrichia belodes sp. nov., holotype male. 2A, dorsal habitus. 2B, head, dorsal. 2C, head and thorax, dorsal. Scale bars in mm: 2A = 0.6; 2B = 0.1; 2C = 0.2.

FIGURE 8. Ochrotrichia ducke sp. nov., paratype male. 8A, dorsal habitus. 8B, head, dorsal. 8C, head and thorax, dorsal. Scale bars in mm: 8A = 0.5; 8B = 0.1; 8C = 0.2.

FIGURE 9. Ochrotrichia ducke sp. nov., wings (paratype), with longitudinal veins highlighted in colors. 9A, venation of the right forewing, dorsal. 9B, venation of the right hind wing, dorsal. Scale bar = 0.2 mm.

FIGURE 10. Ochrotrichia ducke sp. nov., male genitalia (holotype). 10A1, genitalia, left lateral. 10A2, tergum X, left lateral. 10B, mesoventral process of segment VII, left lateral. 10C, genitalia, left lateral. 10D, phallus, left lateral. 10E, genitalia, dorsal. 10F, apex of phallus, ventral. 10G, genitalia, ventral. 10H, genitalia, ventral. Scale bars = 0.05 mm.