Ochrotrichia belodes, 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 : 251-254

publication ID	https://doi.org/ 10.11646/zootaxa.5060.2.6
publication LSID	lsid:zoobank.org:pub:AABD8818-6D30-46E5-B758-21659DD90A4E
DOI	https://doi.org/10.5281/zenodo.5633577
persistent identifier	https://treatment.plazi.org/id/546887A9-FFD4-FFF7-FF38-3BB402CA42B0
treatment provided by	Plazi
scientific name	Ochrotrichia belodes
status	sp. nov.

Treatment

Ochrotrichia belodes sp. nov.

( Figures 2A–2C View FIGURE 2 , 3A–3B View FIGURE 3 , 4A–4H View FIGURE 4 )

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. GoogleMaps

Paratypes: BRAZIL: Amazonas : Manaus , Reserva Ducke, Igarapé Barro Branco, 02°55’48.9”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 GoogleMaps .

Diagnosis. The new species is most similar to O. igrapiuna based on the pointed apex of the tergum X. Ochrotrichia belodes sp. nov. also resembles O. buenosoria sp. nov. by the presence of basal spines on the inferior appendages and the basal processes on tergum X; and O. ducke sp. nov. by the cluster of mesal spines on the inferior appendage. However, in O. igrapiuna the tergum X has a sclerotized, spine-like basal process, which is absent in O. belodes sp. nov. The basal spines of the inferior appendages are short in this new species, whereas they are long in O. buenosoria sp. nov. and absent in O. ducke sp. nov. In addition, in O. belodes sp. nov. the basal process of tergum X is dorsal but dorsolateral in O. buenosoria sp. nov.

The new species can be distinguished from all other similar species by the combination of the sagittate tergum X in dorsal view with a pair of basal processes directed anterad and the three clusters of spines on the inner surfaces of the inferior appendages, one subapical with thinner peg-like setae, one at mid-length with thicker spines, and one on the basal region with thicker spines.

Description. Male adult (n = 2). Total body length 1.83–2.25 mm; length of each forewing 1.60–1.98 mm. General color brown (in alcohol) ( Fig. 2A View FIGURE 2 ). Head with three ocelli; dorsally with two pairs of setal warts; ocellar pair appressed on midline, each subtriangular; posterolateral pair large, ellipsoid ( Fig. 2B View FIGURE 2 ). Metascutellum subpentagonal ( Fig. 2C View FIGURE 2 ). Forewings each with forks I, II, III present; discoidal cell absent; R 3 fused with basal 3/4 of R 4+5; M 1+2 partially fused with subapical portion of R 4+5; M 1 vein distinct from mid-length of R 5 vein; M 2 vein distinct from R 4+5 vein immediately before origin of fork II; fork of M 1+2 and M 3+4 veins near origin of independent R 3 vein; r and r-m crossveins absent ( Fig. 3A View FIGURE 3 ). Hind wings each with forks II and V present; C with row of short spines on proximal region; R 2+3 vein originating near level of apex of M 1+2; base of M 1+2 vein fused with R and R 2-5, becoming independent from basal 1/3 of R 2-5; and Cu 1 vein subdivided apically into 2 branches ( Fig. 3B View FIGURE 3 ). Tibial spur formula 0, 3, 4. Abdominal sternum VII with subtriangular mesoventral process ( Fig. 4B View FIGURE 4 ).

Genitalia. Segment IX in lateral view with upper anterolateral margin concave, ventromesally produced; upper posterolateral margins slightly produced posterad ( Figs 4A View FIGURE 4 1 View FIGURE 1 , 4C View FIGURE 4 ); in dorsal view, with deep U-shaped cleft posteriorly ( Fig. 4E View FIGURE 4 ); in ventral view, subpentagonal ( Figs 4G, 4H View FIGURE 4 ). Tergum X in lateral view long, 2/3 as long as inferior appendages, convex ventrally at midlength and tapering to subacute apex ( Figs 4A View FIGURE 4 1 View FIGURE 1 , 4A View FIGURE 4 2 View FIGURE 2 ); in dorsal view, not divided, sagittate, narrow, with long, semi-membranous base bearing two sclerotized, claw-like basodorsal process directed posterad; pair of triangular lobes at midlength directed anterad; and apex strongly sclerotized, pointed ( Fig. 4E View FIGURE 4 ). Inferior appendages in lateral view oblong; 3.5× as long as wide, apically rounded ( Figs 4A View FIGURE 4 1 View FIGURE 1 , 4C View FIGURE 4 ); in dorsal view, surpassing tergum X, with inner surfaces bearing numerous slender, dark, peg-like setae grouped subapically ( Fig. 4E View FIGURE 4 ); in ventral view, with two additional clusters of thick spines on inner margin: (i) row of 4 or 5 thick spines at midlength; (ii) row of 3 or 4 thick spines basally ( Figs 4G, 4H View FIGURE 4 ). Phallus simple, tubular, elongate, 3.2× longer than inferior appendages and thread-like ( Figs 4D, 4F View FIGURE 4 ).

Female and immature stages. Unknown.

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

Etymology. The specific epithet is an allusion to the sagittate or arrowhead shape of tergum X in dorsal view. Derived from the Greek adjective, belodes meaning “like an arrow”.