Acostatrichia ujasa Oláh & Flint 2012

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), Zootaxa 4755 (2), pp. 201-230 : 225

publication ID

https://doi.org/ 10.11646/zootaxa.4755.2.1

publication LSID

lsid:zoobank.org:pub:urn:lsid:zoobank.org:pub:CAD4295B-2456-48EE-98F6-723FDEF5C0EB

DOI

https://doi.org/10.5281/zenodo.3812833

persistent identifier

https://treatment.plazi.org/id/D40B8780-CA5D-FFFB-D7F1-FE3AFD1BF965

treatment provided by

Carolina

scientific name

Acostatrichia ujasa Oláh & Flint 2012
status

 

Acostatrichia ujasa Oláh & Flint 2012

Figs. 14 View FIGURE 14 , 15C View FIGURE 15 , 16 View FIGURE 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 View FIGURE 15 ). 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 View FIGURE 14 ). Segment VIII shorter dorsally than ventrally ( Fig. 14C View FIGURE 14 ); in ventral view, posterior margin of sternum with two lobes forming deep median U-shaped incision surrounded by short setae ( Fig. 14A View FIGURE 14 ); without lateral processes, but with apicoventral margin projecting in lateral view ( Fig. 14C View FIGURE 14 ); tergum with transverse row of long setae ( Fig. 14B View FIGURE 14 ). 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 View FIGURE 14 ), slightly upturned in lateral view ( Fig. 14C View FIGURE 14 ); each with four very long, strong, and curved apical spines ( Figs. 14 View FIGURE 14 A–14C). Preanal process absent ( Fig. 14B View FIGURE 14 ). Inferior appendages fused with each other only basally, distal portions free, each short, apically rounded and with subapical incision on inner margin ( Fig. 14A View FIGURE 14 ); with pair of very long rod-like lateral processes rising from basal area, dilatated at apices ( Fig. 14A View FIGURE 14 ); in lateral view, upturned ( Fig. 14C View FIGURE 14 ). Subgenital plate, in ventral view, broad, with sclerotized belt basally and with V-shaped incision on posterior margin ( Fig. 14A View FIGURE 14 ); in lateral view, directed posterad and rounded apically ( Fig. 14C View FIGURE 14 ). Tergum X membranous, bilobed, dorsal lobe quadrangular, ventral lobe pentagonal in dorsal view ( Fig. 14B View FIGURE 14 ). Phallus tubular basally, bearing midlength complex, with dorsal window and basal loop as long as basal portion ( Fig. 14D View FIGURE 14 ); apical portion with plate-like sclerite and more than eight internal spines ( Figs. 14D, 14E View FIGURE 14 ).

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 View FIGURE 11 , 14A View FIGURE 14 ). 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 View FIGURE 14 ), whereas in A. cerna the phallus has four long internal spines ( Fig. 11D View FIGURE 11 ).

Distribution. Ecuador and Peru ( Fig. 16 View FIGURE 16 ).

NMNH

USA, Washington D.C., National Museum of Natural History, [formerly, United States National Museum]

NMNH

Smithsonian Institution, National Museum of Natural History

DM

Dominion Museum

Kingdom

Animalia

Phylum

Arthropoda

Class

Insecta

Order

Trichoptera

Family

Hydroptilidae

Genus

Acostatrichia

Loc

Acostatrichia ujasa Oláh & Flint 2012

Santos, Allan Paulo Moreira 2020
2020
Loc

Leucotrichiinae

Santos, A. P. M. & Nessimian, J. L. & Takiya, D. M. 2016: 462
2016
Loc

Acostatrichia ujasa Oláh & Flint 2012: 158

Olah, J. & Flint, O. S. Jr. 2012: 158
2012