New species and new geographical record of Ochrotrichia Mosely 1934 (Trichoptera: Hydroptilidae) from Rio de Janeiro state, Brazil
Cavalcante, Bruna Maria Silva
Dumas, Leandro Lourenço
Nessimian, Jorge Luiz
Zootaxa
2018
2018-08-27
4462
2
229
236
5B
33310
Cavalcante & Dumas & Nessimian, 2018
Cavalcante & Dumas & Nessimian
2018
[151,498,1048,1074]
Insecta
Hydroptilidae
Ochrotrichia
GBIF
Animalia
Trichoptera
1
230
Arthropoda
species
nematomorpha
sp. nov.
Diagnosis: Ochrotrichia nematomorpha sp. nov.can be placed in the O. xenaGroup of Flint (1972)as indicated by the overall arrangement of male genital structures, especially by segment X occurring as a single, broad, elongated plate. The new species is most similar to O. igrapiuna Souza, Santos & Takiya 2014in the long subtriangular tergum X with its projected posterior margin. However, O. nematomorpha sp. nov.can be easily distinguished from O. igrapiunaby the membranous right side and the median membranous handle-like process of tergum X, by the robust and diamond-shaped inferior appendages with apical and posteroventral clusters of peglike setae, and the phallus being extremely slender, long and acute apically.
Description: Male.General color uniform brown (in alcohol). Body length from tip of head to ends of folded wings: 3.0 mm; length of each forewing: 2.3 mm( holotypemale). Tibial spur formula 1,3,4. Wing venation typical for the genus. Metascutellum subpentagonal. Abdomen without visible modifications. Male genitalia. Segment IX in lateral view subquadrangular, anterior margins dorsally and ventrally produced anterad and anterolateral margins concave at midheight, posterior margins dorsally produced posterad ( Fig. 1A); dorsum IX with deeply U-shaped cleft posteriorly, almost entirely divided into two lobes ( Fig. 1B); venter IX subpentagonal ( Fig. 1C). Tergum X in lateral view long, not divided, broad at base and tapering to acute apex from about midlength ( Fig. 1A); in dorsal view subtriangular, narrow, with biconcave base, left side slightly sclerotized, right side membranous and bearing mesal, membranous handle-like projection ( Fig. 1B). Inferior appendages, in lateral view, robust, short, diamond-shaped, anterodorsal, posterodorsal, and posteroventral margins rounded, with long setae covering surfaces ( Fig. 1A); in dorsal view wide basally with dorsolateral fold ( Fig. 1B); in ventral view tapering, with clusters of dark, peg-like setae apically and subapically on inner edges ( Fig. 1C). Phallus tubular, long, extremely slender, very acute at apex; ejaculatory duct not protruding apically ( Fig. 1D).
Holotypemale: BRAZIL: Rio de Janeiro: Rio de Janeiro, Parque Nacional da Tijuca, Rio Tijuca, Cascatinha Taunay, 22°57’33.7”S, 43°16’40.2”W, 407 m, 11.iv.2014, JL Nessimian, LL Dumas, CC Gonçalves, BM Silva& SP Gomes leg. ( DZRJ).
Distribution. Brazil( Rio de Janeiro).
Etymology.The specific epithet, nematomorpha(Greek, nema, thread; morpha, shape), refers to the slender, long phallus, which resembles the body shape of horsehair worms (Phylum Nematomorpha).
1913892248
2014-04-11
DZRJ
Nessimian & Dumas & Goncalves & Silva & SP Gomes
Brazil
Parque Nacional da Tijuca
407
-22.959362
Cascatinha Taunay
1
-43.277832
Rio Tijuca
1
230
1
Rio de Janeiro
holotype