Oxyethira (Tanytrichia) septentrionalis , De Souza, Wagner Rafael M. & Santos, Allan Paulo Moreira, 2017

De Souza, Wagner Rafael M. & Santos, Allan Paulo Moreira, 2017, Taxonomic study of the genus Oxyethira Eaton 1873 (Trichoptera: Hydroptilidae) from Northeast Brazil: Eleven new species and distributional records, Zootaxa 4236 (3), pp. 484-506: 498

publication ID

https://doi.org/10.11646/zootaxa.4236.3.4

publication LSID

lsid:zoobank.org:pub:C034B77B-BCC0-46FA-9541-12229A053852

persistent identifier

http://treatment.plazi.org/id/4B1B3448-FFA8-AC41-E7E8-02A5FE1D4A68

treatment provided by

Plazi

scientific name

Oxyethira (Tanytrichia) septentrionalis
status

sp. nov.

Oxyethira (Tanytrichia) septentrionalis  sp. nov.

Fig. 9A–9View FIGURE 9 D

Oxyethira  sp. 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, 9View FIGURE 9 C).

Male genitalia: Segment VIII annular, covered with setae; sternum VIII with U-shaped posteromesal incision ( Fig. 9AView FIGURE 9); tergum VIII excavated medially, excavation partially enclosed with two mesolateral lobes with long setae ( Fig. 9View FIGURE 9 B). Segment IX retracted in segment VIII, sternum IX produced anteriorly into anterior area of segment VI, with anterior margin rounded, nearly truncate ( Figs. 9A, 9View FIGURE 9 B); 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. 9AView FIGURE 9); in lateral view, hidden by segment VIII. Subgenital plate inconspicuous; in ventral, dorsal, and lateral views covered by segment VIII ( Figs. 9A, 9View FIGURE 9 B, 9C); in lateral view curved posterodorsad, slender, shorter than inferior appendages ( Fig. 9View FIGURE 9 C). Bilobed process with short processes, each with small apical seta ( Figs. 9A, 9View FIGURE 9 C). 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. 9View FIGURE 9 D).

Remarks. This species is placed in the subgenus Tanytrichia due 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 Loxotrichia species. 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 septentrionalis  is a Latin adjective meaning “northern”.

Material examined. Holotype. BRAZIL: Piauí: Piracuruca, Parque Nacional de Sete Cidades , alojamento, 4°05'57''S, 41°42'34''W, 193 m, 20.vi.2012, DM Takiya col., light trap, 1 ♂ ( CZMA)GoogleMaps  . Paratypes. Same data as holotype, 1 ♂, (CZMA). Same data as holotype except by, Poço da Bananeira , 4°05'56''S, 41°40'34''W, 189 m, 19.iv.2012, 1 ♂ ( DZRJ)GoogleMaps  . Same data as holotype except cachoeira do Riachão , 4°06'58''S, 41°40'13''W, 171 m, 18.iv.2012, 13 ♂ ( DZRJ)GoogleMaps  .

Kingdom

Animalia

Phylum

Arthropoda

Class

Insecta

Order

Trichoptera

Family

Hydroptilidae

Genus

Oxyethira

Loc

Oxyethira (Tanytrichia) septentrionalis

De Souza, Wagner Rafael M. & Santos, Allan Paulo Moreira 2017

2017
Loc

Oxyethira

Takiya 2016: 170

2016