Acostatrichia simulans Mosely, 1939

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 : 209-210

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.3812817

persistent identifier

https://treatment.plazi.org/id/D40B8780-CA4D-FFEA-D7F1-FB78FCB2FD23

treatment provided by

Carolina

scientific name

Acostatrichia simulans Mosely, 1939
status

 

Acostatrichia simulans Mosely, 1939

Figs. 6 View FIGURE 6 , 16 View FIGURE 16

Acostatrichia simulans Mosely 1939: 229 , figs. 179–182, male; type locality: Brazil, Santa Catarina, Nova Teutonia; type depository: BMNH.

Angrisano (1995), reported from Uruguay.

Angrisano & Sganga (2010) View Cited Treatment , larva, pupa, case, biology, reported from Argentina.

Santos et al. (2016), phylogenetic placement.

Redescription. Length from front of head to tips of folded forewings 2.0–3.0 mm (n = 9). General color, in alcohol, light brown. Head unmodified. Ocelli 3. Antenna 19-articulated; scape cylindrical, twice as long as wide, inner margin not produced; pedicel cylindrical; flagellomeres cylindrical, unmodified. Forewings each with costal vein bearing short basal bulla. Abdominal segment VII bearing two acute ventromesal processes, basal one shorter ( Figs. 6A, 6C View FIGURE 6 ).

Male genitalia. Segment VIII shorter dorsally than ventrally ( Fig. 6C View FIGURE 6 ); in ventral view, posterior margin of sternum with shallow median V-shaped incision ( Fig. 6A View FIGURE 6 ), without lateral processes; tergum with scattered setae. Segment IX mostly within segment VIII, ventrally open; with pair of elongate dorsolateral processes, gradually curved inwards in dorsal and ventral views ( Figs. 6A, 6B View FIGURE 6 ), almost straight in lateral view ( Fig. 6C View FIGURE 6 ), each one with sinuous subapical spine ( Figs. 6A, 6B, 6C View FIGURE 6 ). Preanal processes digitate and each bearing very long seta ( Fig. 6C View FIGURE 6 ). Inferior appendages paired, short and triangular in ventral view, without apical or basal processes ( Fig. 6A View FIGURE 6 ). Subgenital plate, in ventral view broad and concave at apex ( Fig. 6A View FIGURE 6 ); in lateral view, triangular ( Fig. 6C View FIGURE 6 ). Tergum X membranous, posterior margin convex in dorsal view ( Fig. 6B View FIGURE 6 ), slightly bilobed in lateral view ( Fig. 6C View FIGURE 6 ). Phallus tubular basally, bearing midlength complex with dorsal window and basal loop shorter than basal portion of phallus; apical portion with Y-shaped sclerite and internal spine ( Figs. 6D, 6E View FIGURE 6 ).

Material examined. Brazil, Santa Catarina, Nova Teutonia, ix.1963, F Plaumann leg., Flint 1975 det., 1 male ( NMNH); Nova Teutonia, i.1963, F. Plaumann, Flint det., 6 males ( NMNH). Argentina, Província Misiones, Salto Encantado Provincial Park, Arroyo Azul , 23-28.i.2008, Angrisano & Sganga leg., Sganga 2012 det., 1 male ( DZRJ). Uruguay, Artigas, Rio Cuareim, Sepulturas , 15.xii.1952, CS Carbonell , Flint det., 1 male ( NMNH).

Remarks. Acostatrichia simulans shows typical features of the A. plaumanni Species Group, such as the following: (1) a costal bulla in each forewing, (2) a double ventromesal process on segment VII, (3) the inferior appendages short and not fused to each other, and (4) a pair of long dorsolateral processes on segment IX. In the A. plaumanni Group, A. simulans shares more similarities in male genitalia with A. plaumanni and A. fluminensis , but it can be distinguished from those by a shallow median incision on the posterior margin of segment VIII in ventral view ( Fig. 6A View FIGURE 6 ); and by the dorsolateral processes of segment IX curved inwards in ventral and dorsal views, each one with a short sinuous subapical spine ( Figs. 6A, 6B View FIGURE 6 ). This is the only Acostatrichia species with immature stages described ( Angrisano & Sganga 2010). According to Angrisano & Sganga (2010), the larva is similar to those described for other Leucotrichiini genera, in particular to larvae of Zumatrichia Mosely 1937 , but the A. simulans larva differs by having the frontoclypeus with a reticulate sculpturing and each tarsal claw with an enlarged basal seta.

Distribution. Argentina, Brazil, and Uruguay ( Fig. 16 View FIGURE 16 ).

NMNH

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

DZRJ

DZRJ

NMNH

Smithsonian Institution, National Museum of Natural History

CS

Musee des Dinosaures d'Esperaza (Aude)

Kingdom

Animalia

Phylum

Arthropoda

Class

Insecta

Order

Trichoptera

Family

Hydroptilidae

Genus

Acostatrichia

Loc

Acostatrichia simulans Mosely, 1939

Santos, Allan Paulo Moreira 2020
2020
Loc

Acostatrichia simulans

Santos, A. P. M. & Nessimian, J. L. & Takiya, D. M. 2016: 209
Angrisano & Sganga 2010: 209
Angrisano 1995: 209
Mosely, M. E. 1939: 229
1939