Ochrotrichia buenosoria, 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 : 256-259

Ochrotrichia buenosoria sp. nov.

( Figures 5A–5C , 6A–6B , 7A–7H )

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: BRAZIL: Amazonas : Manaus , Reserva Ducke, Igarapé do Ipiranga, 02°58’53.6”S, 59°54’24.4”W, el. 95 m a.s.l., 1 male ( INPA), 03–17.vii.2015, A.M.O. Pes, G. R. Desidério, P. Barcelos-Silva, W. Xavier legs., Malaise trap .

Diagnosis. The new species shares the ellipsoid shape of the inferior appendages (in lateral view) and the apex of tergum X produced on the left side (in dorsal and lateral views) with O. manuensis being the most similar species. However, the new species has a robust tergum X, but O. manuensis has a narrow, triangular tergum X, tapering toward the apex. Also, the new species has each inferior appendage with a row of 3 or 4 long, basal spines on the inner margin, but these spines are absent in O. manuensis (see Flint & Bueno-Soria 1999).

The new species can be distinguished from all other species in the genus by having a robust tergum X, with each side of the base having an obliquely pointed lateral process in dorsal view, and the inferior appendages each having a row of 3–4 long, stout basal spines on the inner margin.

Description. Male adult (n = 2). Total body length 2.46–2.52 mm; length of each forewing 2.10–2.18 mm. General color dark brown (in 80% alcohol) ( Fig. 5A ). Head with three ocelli; dorsally with two pairs of setal warts; ocellar pair closely appressed on midline, each subtriangular; posterolateral pair large, ellipsoid ( Fig. 5B ). Metascutellum subpentagonal ( Fig. 5C ). Wing venation nearly identical to that of O. belodes sp. nov. except that r and r-m crossveins present in forewings and apparent r-m crossvein (actual base of M 1+2) present in hind wings of this species ( Figs 6A, 6B ). Tibial spur formula 0, 3, 4. Abdominal sternum VII with triangular mesoventral process ( Fig. 7B ).

Genitalia. Segment IX, in lateral view, with upper anterolateral margins concave, mesoventrally produced; upper posterolateral margins produced posterad, apically blunt, each side with small, claw-shaped lobe below this process ( Figs 7A 1 , 7C ); in dorsal view, with deep U-shaped cleft posteriorly, dorsolateral lobes large, almost as long as tergum X ( Fig. 7E ); in ventral view, subrectangular ( Figs 7G, 7H ). Tergum X in lateral view long, apex obliquely truncate, dorsally sclerotized, mesoventrally membranous ( Fig. 7A 1 , 7A 2 ); in dorsal view, not divided, with each side of base having obliquely pointed and triangular lateral process, broad sub-hexagonal base ( Fig. 7E ); apex setoff from basal portion, produced on left side and semi-membranous on right side ( Fig. 7E ). Inferior appendages in lateral view ellipsoid; long (2.5× as long as wide), apically round ( Figs 7A 1 , 7C ); in dorsal view, surpassing tergum X, each with inner surface bearing numerous long, spine-like setae around apex and on mid-basal ridge ( Fig. 7E ); in ventral view, with row of 3 or 4 long, thicker basal spines on inner margin ( Figs 7G, 7H ). Phallus simple, tubular, elongate, 3.6× longer than inferior appendages, and thread-like ( Figs 7D, 7F ).

Female and immature stages. Unknown.

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

Etymology. This new species is named in honor of Dr. Joaquín Bueno-Soria (Universidad Nacional Autónoma de México - Mexico) in recognition of his contributions to the knowledge of Neotropical caddisflies, especially to the study of the microcaddisflies.

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 5. Ochrotrichia buenosoria sp. nov., holotype male. 5A, dorsal habitus. 5B, head, dorsal. 5C, head and thorax, dorsal. Scale bars in mm: 5A = 0.5; 5B = 0.1; 5C = 0.2.

FIGURE 6. Ochrotrichia buenosoria sp. nov., wings (holotype), with longitudinal veins highlighted in colors. 6A, venation of the right forewing, dorsal. 6B, venation of the right hind wing, dorsal. Scale bar = 0.3 mm.

FIGURE 7. Ochrotrichia buenosoria sp. nov., male genitalia (holotype). 7A1, genitalia, left lateral; 7A2,tergum X, left lateral. 7B, mesoventral process of segment VII, left lateral. 7C, genitalia, left lateral. 7D, phallus, left lateral. 7E, genitalia, dorsal. 7F, apex of phallus, ventral. 7G, genitalia, ventral. 7H, genitalia, ventral. Scale bars = 0.05 mm.