Acostatrichia ujasa Olah & Flint 2012
Creators: name: Santos, Allan Paulo Moreira
Publisher: name: Zenodo
Year: 2020
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Trichoptera
Hydroptilidae
Acostatrichia
Acostatrichia ujasa

description: Acostatrichia ujasa Oláh & Flint 2012
Figs. 14, 15C, 16
Acostatrichia ujasa Oláh & Flint 2012: 158, figs. 41–43, male; type locality: Ecuador: Pastaza Province, Puyo (27 km North), Estacion Fluviometrica; type depository: NMNH.
Leucotrichiinae genus B Santos et al. 2016: 462, figs. 4, 5; phylogenetic placement.
Redescription. Length from front of head to tips of folded forewings 4.0– 4.5 mm (n = 6). General color, in alcohol, brown. Pinned specimen brown, with spots of green setae on head, thorax, and wings (Fig. 15C). Head unmodified. Ocelli 3. Antennae each 21-articulated; scape cylindrical, twice as long as wide, inner margin not produced; pedicel cylindrical; flagellomeres cylindrical, unmodified. Forewings each with costal vein simple, unmodified. Abdominal segment VII bearing long ventromesal process, with acute apex (Figs. 14A, 14C). Segment VIII shorter dorsally than ventrally (Fig. 14C); in ventral view, posterior margin of sternum with two lobes forming deep median U-shaped incision surrounded by short setae (Fig. 14A); without lateral processes, but with apicoventral margin projecting in lateral view (Fig. 14C); tergum with transverse row of long setae (Fig. 14B). Segment IX mostly within segment VIII, ventrally open, with pair of long digitiform dorsolateral processes with slightly dilated apices, slightly curved gradually laterad except apices curved slightly inwards in ventral and dorsal views (Figs. 14A, 14B), slightly upturned in lateral view (Fig. 14C); each with four very long, strong, and curved apical spines (Figs. 14 A–14C). Preanal process absent (Fig. 14B). Inferior appendages fused with each other only basally, distal portions free, each short, apically rounded and with subapical incision on inner margin (Fig. 14A); with pair of very long rod-like lateral processes rising from basal area, dilatated at apices (Fig. 14A); in lateral view, upturned (Fig. 14C). Subgenital plate, in ventral view, broad, with sclerotized belt basally and with V-shaped incision on posterior margin (Fig. 14A); in lateral view, directed posterad and rounded apically (Fig. 14C). Tergum X membranous, bilobed, dorsal lobe quadrangular, ventral lobe pentagonal in dorsal view (Fig. 14B). Phallus tubular basally, bearing midlength complex, with dorsal window and basal loop as long as basal portion (Fig. 14D); apical portion with plate-like sclerite and more than eight internal spines (Figs. 14D, 14E).
Material examined. HOLOTYPE male: Ecuador, Past., Puyo (27 Kms. N.) Est. Fluv. Metrica, 4 February 1976, Spangler et al. leg. (NMNH); PARATYPE: same data, 1 male pinned (NMNH).
Additional material. Peru, Cusco, Quincemil, stream, S 13°13’03” W 73°43’40”, el. 633 m, 20.viii.2012, light trap, APM Santos & DM Takiya leg., 3 males (DZRJ).
Remarks. This species shares with A. cerna similarities in the general aspect of the male genitalia, particularly, the presence of three or four conspicuous apical spines on each dorsolateral process of segment IX (Figs. 11A, 14A). However, these two species can be distinguished from each other by those apical spines, much longer in A. ujasa, and also by phallus, in A. ujasa with more than eight internal spines (Fig. 14D), whereas in A. cerna the phallus has four long internal spines (Fig. 11D).
Distribution. Ecuador and Peru (Fig. 16).
description: Published as part of Santos, Allan Paulo Moreira, 2020, A review of the Neotropical microcaddisfly genus Acostatrichia Mosely, 1939 with description of a new species from Brazil (Trichoptera: Hydroptilidae: Leucotrichiinae), pp. 201-230 in Zootaxa 4755 (2) on page 225, DOI: 10.11646/zootaxa.4755.2.1, http://zenodo.org/record/3731414