Acostatrichia cerna 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 : 219-221

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.3812827

persistent identifier

https://treatment.plazi.org/id/D40B8780-CA57-FFF7-D7F1-F9DAFDB0FC0C

treatment provided by

Carolina

scientific name

Acostatrichia cerna Oláh & Flint 2012
status

 

Acostatrichia cerna Oláh & Flint 2012

Figs. 11 View FIGURE 11 , 16 View FIGURE 16

Acostatrichia cerna Oláh & Flint 2012: 143 , figs. 5–7, male; type locality: Ecuador: Los Rios Province. Quevedo (56 km North), Rio Palenque Biological Station, 250 m; type depository: NMNH.

Redescription. Length from front of head to tips of folded forewings 4 mm (n = 2). Specimens examined completely cleared. General color, in alcohol, according to Oláh & Flint (2012), brown. Head unmodified. Ocelli 3. Antenna broken; scape cylindrical, twice as long as wide, inner margin not produced; pedicel cylindrical. Forewings each with costal vein simple, unmodified. Abdominal segment VII bearing long ventromesal process, with acute apex ( Figs. 11A, 11C View FIGURE 11 ). Segment VIII shorter dorsally than ventrally ( Fig. 11C View FIGURE 11 ); in ventral view, posterior margin of sternum with two lobes forming median deep U-shaped incision surrounded by short setae ( Fig. 11A View FIGURE 11 ); without lateral processes, but with apicoventral margins projecting in lateral view ( Fig. 11C View FIGURE 11 ); tergum with short stout setae ( Fig. 11B View FIGURE 11 ). Segment IX mostly within segment VIII, ventrally open; with pair of long digitiform dorsolateral processes with slightly dilated apices, almost straight in ventral and dorsal views ( Figs. 11A, 11B View FIGURE 11 ), slightly upturned in lateral view ( Fig. 11C View FIGURE 11 ); each with four long, strong, and curved apical spines ( Figs. 11 View FIGURE 11 A–11C). Preanal process absent ( Fig. 11B View FIGURE 11 ). Inferior appendages fused with each other only basally, distal portions free, each short, apically rounded and with incision on inner margin ( Fig. 11A View FIGURE 11 ); with pair of very long rod-like lateral processes rising from basal area, in ventral view slightly dilated at apex ( Fig. 11A View FIGURE 11 ); in lateral view, sinuous and slightly upturned ( Fig. 11C View FIGURE 11 ). Subgenital plate, in ventral view, broad, with a sclerotized belt basally and concave at apex ( Fig. 11A View FIGURE 11 ); in lateral view, directed posterad and rounded apically ( Fig. 11C View FIGURE 11 ). Tergum X membranous, pentagonal in dorsal view ( Fig. 11B View FIGURE 11 ). Phallus tubular basally, bearing midlength complex, with dorsal window and basal loop as long as basal portion ( Fig. 11D View FIGURE 11 ); apical portion with conspicuous sclerite trifid at apex and two pairs of long straight internal spines ( Figs. 11D, 11E View FIGURE 11 ).

Material examined. HOLOTYPE male: Ecuador, Los Rios Prov., Quevedo (56 km N), Rio Palenque Biological Station , 250 m, blacklight at riverbed, 28–29July1976, Jeffrey Cohen leg. ( NMNH); PARATYPE: Ecuador, Cotop. Quevedo (36 km NE), 21.VII.1976, blacklight, Jeffrey Cohen leg., 1 male ( NMNH).

Remarks. Within this species group, Acostatrichia cerna Oláh & Flint 2012 is more similar to A. ujasa , both species having four conspicuous apical spines on each of the dorsolateral processes of segment IX ( Figs. 11A View FIGURE 11 , 14A View FIGURE 14 ), whereas A. darda and A. kihara Oláh & Flint 2012 have only one apical spine on each of these processes ( Figs. 12A View FIGURE 12 , 13A View FIGURE 13 ). Acostatrichia cerna can be distinguished from A. ujasa by the smaller spines on each dorsolateral process of segment IX and by the number and size of internal spines in the phallus: four long spines in A. cerna and several smaller spines in A. ujasa .

Distribution. Ecuador ( 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 cerna Oláh & Flint 2012

Santos, Allan Paulo Moreira 2020
2020
Loc

Acostatrichia cerna Oláh & Flint 2012: 143

Olah, J. & Flint, O. S. Jr. 2012: 143
2012