Takiya et al. 2016 : 170
Taxonomic study of the genus Oxyethira Eaton 1873 (Trichoptera: Hydroptilidae) from Northeast Brazil: Eleven new species and distributional records
De Souza, Wagner Rafael M.
Santos, Allan Paulo Moreira
Zootaxa
2017
4236
3
484
506
Takiya et al. 2016 : 170
[151,621,695,721]
Insecta
Hydroptilidae
Oxyethira
Animalia
Trichoptera
14
498
Arthropoda
species
septentrionalis
sp. nov.
Tanytrichia
Oxyethirasp. 1 Takiya et al.2016: 170 Description. Holotype.Length 2.0 mm. General color pale brown (in alcohol). General pattern of Neotropical Oxyethira. Sternum VII with small posterior mesoventral process ( Figs. 9A, 9C). Male genitalia: Segment VIII annular, covered with setae; sternum VIII with U-shaped posteromesal incision ( Fig. 9A); tergum VIII excavated medially, excavation partially enclosed with two mesolateral lobes with long setae ( Fig. 9B). Segment IX retracted in segment VIII, sternum IX produced anteriorly into anterior area of segment VI, with anterior margin rounded, nearly truncate ( Figs. 9A, 9B); in lateral view, produced dorsad near posterior end. Inferior appendages short and square, with darkened apices; fused to sternum IX and to each other basally ( Fig. 9A); in lateral view, hidden by segment VIII. Subgenital plate inconspicuous; in ventral, dorsal, and lateral views covered by segment VIII ( Figs. 9A, 9B, 9C); in lateral view curved posterodorsad, slender, shorter than inferior appendages ( Fig. 9C). Bilobed process with short processes, each with small apical seta ( Figs. 9A, 9C). Tergum X membranous. Phallus divided into basal and distal portions; basal portion tubular, longer than distal portion; distal portion sclerotized on right side, sclerotization subtriangular, with elongate spine-like process arising at mid-length of left side; ejaculatory duct not protruding ( Fig. 9D).
Remarks.This species is placed in the subgenus Tanytrichiadue to segment IX reaching segment IV. However, the short, fused inferior appendages and the general aspect of the segment IX is more similar to the Loxotrichiaspecies. Oxyethira septentrionalis sp. nov.is most similar to O. sencilla Holzenthal & Harris 1992, both having tergum VIII excavated and forming two mesolateral lobes, short inferior appendages, and the subgenital plate inconspicuous and covered by segment VIII. The new species can be distinguished by the phallus being divided into basal and distal portions, with the distal portion having a long spine-like curved process at midlength.
Etymology.The specific name is a reference to the type-locality, one of the most northern region of Brazil. The word septentrionalisis a Latin adjective meaning “northern”.
Materialexamined. Holotype. BRAZIL: Piauí: Piracuruca, Parque Nacional de Sete Cidades, alojamento, 4°05'57''S, 41°42'34''W, 193 m, 20.vi.2012, DM Takiyacol., light trap, 1 ♂( CZMA). Paratypes.Same data as holotype, 1 ♂, (CZMA). Samedata as holotypeexcept by, Poço da Bananeira, 4°05'56''S, 41°40'34''W, 189 m, 19.iv.2012, 1 ♂( DZRJ). Samedata as holotypeexcept cachoeira do Riachão, 4°06'58''S, 41°40'13''W, 171 m, 18.iv.2012, 13 ♂( DZRJ).
1437078920
2012-06-20
CZMA
Parque Nacional de Sete Cidades & DM Takiya
Brazil
Material
193
-4.099167
Parque Nacional de Sete Cidades
21
-41.709446
Piracuruca
14
498
1
1
Piaui
holotype
1437078933
2012-04-19
DZRJ
Poco da Bananeira
Brazil
189
-4.098889
Poco da Bananeira
21
-41.676113
Same
14
498
1
1
Piaui
holotype
1437078944
2012-04-18
DZRJ
Brazil
171
-4.116111
Riachao
21
-41.67028
Same
14
498
13
13
Piaui
holotype