Acostatrichia kihara 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 : 223-225

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.3812821

persistent identifier

https://treatment.plazi.org/id/D40B8780-CA53-FFFB-D7F1-FC37FD5BFE27

treatment provided by

Carolina

scientific name

Acostatrichia kihara Oláh & Flint 2012
status

 

Acostatrichia kihara Oláh & Flint 2012

Figs. 13 View FIGURE 13 , 15B View FIGURE 15 , 16 View FIGURE 16

Acostatrichia kihara Oláh & Flint 2012: 150 , figs. 22–25, male; type locality: Ecuador: Napo Province, Pano, at stream, 580 m; type depository: NMNH.

Redescription. Length 3.3–3.5 mm (n = 2). General color, in alcohol, brown. Pinned specimen brown, with spots of green setae on head, thorax, and wings ( Fig. 15B View FIGURE 15 ). Head unmodified. Ocelli 3. Antennae each 20-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. 13A, 13C View FIGURE 13 ). Segment VIII shorter dorsally than ventrally ( Fig. 13C View FIGURE 13 ); in ventral view, posterior margin of sternum with two lobes forming a median deep V-shaped incision surrounded by short setae ( Fig. 13A View FIGURE 13 ); without lateral processes, but with apicoventral margin projecting in lateral view ( Fig. 13C View FIGURE 13 ); tergum with scattered setae ( Fig. 13B View FIGURE 13 ). Segment IX mostly within segment VIII, ventrally open, with pair of long digitiform dorsolateral processes, slightly curved inward in ventral and dorsal views ( Figs. 13A, 13B View FIGURE 13 ), slightly upturned in lateral view ( Fig. 13C View FIGURE 13 ); each with strong apical spine ( Fig. 13C View FIGURE 13 ). Preanal process absent ( Fig. 13B View FIGURE 13 ). Inferior appendages fused with each other only basally, each distal portion free, club-shaped, apically rounded with acute internal corner ( Fig. 13A View FIGURE 13 ); with pair of very long rod-like lateral processes rising from basal area ( Fig. 13A View FIGURE 13 ); in lateral view, straight and posteriorly directed ( Fig. 13C View FIGURE 13 ). Subgenital plate, in ventral view, broad and concave at apex ( Fig. 13A View FIGURE 13 ); in lateral view, directed posterad and rounded apically ( Fig. 13C View FIGURE 13 ). Tergum X membranous, bilobed, dorsal lobe quadrangular, ventral lobe pentagonal in dorsal view ( Fig. 13B View FIGURE 13 ). Phallus tubular basally, bearing midlength complex, with dorsal window and basal loop as long as basal portion ( Fig. 13D View FIGURE 13 ); apical portion with conspicuous sclerite having U-shaped incision at apex, several short internal spines ( Figs. 13D, 13E View FIGURE 13 ), and pair of long curved internal spines, forming forceps in dorsal view ( Fig. 13D View FIGURE 13 ).

Material examined. HOLOTYPE male: Ecuador, Napo, Pano , 580 m, 12 Sep 1990, blacklight at stream, P.J. Spangler leg., colln#19 ( NMNH); PARATYPES: Venezuela, BA., Rio Sto. Domingo, Barinas, 17 February 1976, C.M. & O.S. Flint, Jr. leg., 1 male pinned, 1 male alcohol ( NMNH).

Remarks. As mentioned before, within the A. cerna Group, this and the preceding species share several features of male genitalia, for example, the presence of an apical spine on each dorsolateral process of segment IX ( Figs. 12A View FIGURE 12 , 13A View FIGURE 13 ), the general aspect of inferior appendages ( Figs. 12A View FIGURE 12 , 13A View FIGURE 13 ), and the phallus with a pair of long and curved internal spines ( Figs. 12D View FIGURE 12 , 13D View FIGURE 13 ). However, A. kihara can be recognized by the spines of the dorsolateral processes of segment IX being straight ( Fig. 13A View FIGURE 13 ), not geniculate ( Fig. 12A View FIGURE 12 ), by the lateral processes of the inferior appendages being more digitiform in ventral ( Fig. 13A View FIGURE 13 ) and lateral views ( Fig. 13C View FIGURE 13 ), and by the presence of several short spines in the phallus near the base of the internal sclerite ( Fig. 13D View FIGURE 13 ).

Distribution. Ecuador and Venezuela ( 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

Kingdom

Animalia

Phylum

Arthropoda

Class

Insecta

Order

Trichoptera

Family

Hydroptilidae

Genus

Acostatrichia

Loc

Acostatrichia kihara Oláh & Flint 2012

Santos, Allan Paulo Moreira 2020
2020
Loc

Acostatrichia kihara Oláh & Flint 2012: 150

Olah, J. & Flint, O. S. Jr. 2012: 150
2012