Acostatrichia darda 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 : 221-223

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.3812819

persistent identifier

https://treatment.plazi.org/id/D40B8780-CA51-FFF5-D7F1-FC1AFD1BFC2F

treatment provided by

Carolina

scientific name

Acostatrichia darda Oláh & Flint 2012
status

 

Acostatrichia darda Oláh & Flint 2012

Figs. 12 View FIGURE 12 , 15A View FIGURE 15 , 16 View FIGURE 16

Acostatrichia darda Oláh & Flint 2012: 145 , figs. 8–11, male; type locality: Peru: Cusco Department, Pilcopata, premontane moist forest, 600 m; type depository: NMNH.

Acostatrichia hosulaba Oláh & Flint 2012: 147 figs. 16–18, male; type locality: Ecuador: Pastaza Province, Puyo (1.5 km South); type depository: NMNH. NEW SYNONYM.

Acostatrichia pika Oláh & Flint 2012: 151 , figs. 26-28, male; type locality: Ecuador: Pichincha Province, Santo Domingo de los Colorados, 14 km East; type depository: NMNH. NEW SYNONYM.

Redescription. Length from front of head to tips of folded forewings 3.5–4.0 mm (n = 2). General color, in alcohol, brown. Pinned specimen brown, with spots of green setae on head, thorax, and wings ( Fig. 15A 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. 12A, 12C View FIGURE 12 ). Segment VIII shorter dorsally than ventrally ( Fig. 12C View FIGURE 12 ); in ventral view, posterior margin of sternum with two lobes forming deep U-shaped incision medially surrounded by short setae ( Fig. 12A View FIGURE 12 ); without lateral processes, but with apicoventral margin projecting in lateral view ( Fig. 12C View FIGURE 12 ); tergum with scattered setae ( Fig. 12B View FIGURE 12 ). Segment IX mostly within segment VIII, ventrally open; with pair of long digitiform dorsolateral processes with small projection on apex, slightly curved inwards in ventral and dorsal views ( Figs. 12A, 12B View FIGURE 12 ), upturned in lateral view ( Fig. 12C View FIGURE 12 ); each with strong geniculate apical spine ( Fig. 12A View FIGURE 12 ). Preanal processes absent ( Fig. 12B View FIGURE 12 ). Inferior appendages fused with each other only basally, distal portion free, each club-shaped, apically rounded with acute internal corner ( Fig. 12A View FIGURE 12 ); with pair of very long rod-like lateral processes rising from basal area ( Fig. 12A View FIGURE 12 ); in lateral view, upturned ( Fig. 12C View FIGURE 12 ). Subgenital plate, in ventral view, broad, with V-shaped incision on posterior margin ( Fig. 12A View FIGURE 12 ); in lateral view, directed posterad and obliquely truncate at apex ( Fig. 12C View FIGURE 12 ). Tergum X membranous, pentagonal in dorsal view ( Fig. 12B View FIGURE 12 ). Phallus tubular basally, bearing midlength complex, with dorsal window and basal loop as long as basal portion ( Fig. 12D View FIGURE 12 ); apical portion with conspicuous, median sclerite downturned at apex ( Fig. 12E View FIGURE 12 ), and a pair of long curved internal spines forming forceps in dorsal view ( Fig. 12D View FIGURE 12 ).

Material examined. HOLOTYPE male: Peru, Cusco, Pilcopata , premontane moist forest, 600 m, 8– 10.XII.1979, J.B. Heppner leg. ( NMNH); PARATYPE: Ecuador, Past., Puyo , 18May1977, blacklight, P.J. Spangler & D. R. Givens leg., #56, 1 male (only the abdomen) ( NMNH).

Acostatrichia hosulaba specimens: HOLOTYPE male: Ecuador, Past., Puyo , 14May1977, blacklight, P.J. Spangler & D. R. Givens leg. #44 ( NMNH); PARATYPE: Ecuador, Past., Puyo , 9May1977, blacklight, P.J. Spangler & D. R. Givens leg. #23, 1 male ( NMNH).

Acostatrichia pika specimens: HOLOTYPE male: Ecuador, Pich., Sto. Domingo de los Colorados , 14 Km E, 5July1975, Langley & Cohen leg. ( NMNH); PARATYPE: same data, 1 male pinned ( NMNH).

Remarks. The subjective synonymy of Acostatrichia darda , A. hosulaba , and A. pika is proposed here based on the examination of the type material of these three nominal species. In the original description, Oláh & Flint (2012) presented differences between A. darda and A. pika , but those differences are not evident in the specimens. Nothing is mentioned about similarities among A. hosulaba and these other two species. Since these 3 names were proposed in the same paper, in accordance to the Article 24.2 of the International Code of Zoological Nomenclature (ICZN), the precedence of the name Acostatrichia darda is fixed here over the other two names.

Acostatrichia darda can be distinguished from A. cerna and A. ujasa by the dorsolateral processes of segment IX each having only one apical spine ( Fig. 12A View FIGURE 12 )—with four spines in these other two species—and by the phallus with 2 long and curved internal spines ( Fig. 12D View FIGURE 12 )—four in A. cerna and several smaller spines in A. ujasa . In the A. cerna Group, A. darda is more similar to A. kihara , but can be distinguished from that species by the dorsolateral processes of segment IX, with a geniculate apical spine and a small spine-like projection in A. darda ( Fig. 12A View FIGURE 12 ) and only a straight apical spine in A. kihara ( Fig. 13A View FIGURE 13 ), and by the lateral processes of the inferior appendages slightly lanceolate at apex in A. darda ( Fig. 12A View FIGURE 12 ) and more digitiform in A. kihara ( Fig. 13A View FIGURE 13 ).

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

R

Departamento de Geologia, Universidad de Chile

Kingdom

Animalia

Phylum

Arthropoda

Class

Insecta

Order

Trichoptera

Family

Hydroptilidae

Genus

Acostatrichia

Loc

Acostatrichia darda Oláh & Flint 2012

Santos, Allan Paulo Moreira 2020
2020
Loc

Acostatrichia darda Oláh & Flint 2012: 145

Olah, J. & Flint, O. S. Jr. 2012: 145
2012
Loc

Acostatrichia hosulaba Oláh & Flint 2012: 147

Olah, J. & Flint, O. S. Jr. 2012: 147
2012
Loc

Acostatrichia pika Oláh & Flint 2012: 151

Olah, J. & Flint, O. S. Jr. 2012: 151
2012