Oxyethira (Dactylotrichia) iannuzzae , 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: 485-486

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-FFA7-AC4D-E7E8-06D8FF464EF0

treatment provided by

Plazi

scientific name

Oxyethira (Dactylotrichia) iannuzzae
status

sp. nov.

Oxyethira (Dactylotrichia) iannuzzae  sp. nov.

Fig 2A –2View FIGURE 2 D

Description. Holotype. Length: 2.4 mm. General color pale brown (in alcohol). General pattern of Neotropical Oxyethira  . Sternum VII with posterior mesoventral process ( Figs. 2A, 2View FIGURE 2 C).

Male genitalia: Segment VIII annular, covered with setae; sternum with deep, U-shaped posteromesal incision ( Fig. 2AView FIGURE 2); tergum subrectangular with posterior margin slightly concave ( Fig. 2View FIGURE 2 B). Segment IX retracted in segment VIII; anterior margin truncate and reaching anterior area of segment VI ( Figs. 2A, 2View FIGURE 2 B); with pair of small midlateral processes projecting posterodorsad ( Fig. 2View FIGURE 2 B), tergum reduced. Inferior appendages elongate; in ventral view, curved posterolaterad, with apices diverging, truncate, and darkened ( Fig. 2AView FIGURE 2); in lateral view, curved upward ( Fig. 2View FIGURE 2 C). Subgenital plate conspicuous; in ventral and dorsal views, as two lateral arms projecting obliquely anterolaterad and connected posteriorly with transverse band ( Figs. 2A, 2View FIGURE 2 B); in lateral view lobate, with posterior apex curved downwards. Bilobed process with arms elongate and curved slightly mesad, each with small apical seta ( Figs. 2A, 2View FIGURE 2 B). Tergum X membranous. Phallus simple, subapically with elongate, sinuous, and acute process; apex with small hook ( Fig. 2View FIGURE 2 D); ejaculatory duct indistinguishable.

Remarks. This new species is tentatively placed in Dactylotrichia due to the shape of the segment IX with its anterior margin truncate and reaching the segment VI. However, this new species has apically truncate inferior appendages, whereas they are digitiform in other Dactylotrichia species. Oxyethira iannuzzae  sp. nov. and O. costaricensis Kelley 1983  show a similar process in the posterior region of the phallus, but in the new species this process is subapical and the phallic apex is slightly hooked. In addition, the new species can be distinguished by sternum VIII having a wide and U –shaped posteromesal notch, and by the inferior appendages diverging with truncate apices.

Etymology. The new species is named in honor of Dra. Luciana Iannuzzi, curator of Coleção Entomológia da UFPE who provided many microcaddiflies species for this study.

Material examined. Holotype. BRAZIL: Alagoas: Quebrangulo, Reserva Biológica de Pedra Talhada , Rio Caranguejo , 2 km acima do alojamento, 9°15'03''S, 36°25'56''W, 814 m, 20.vi.2014, APM Santos, DM Takiya, AC Domahovski & WRM Souza cols., light trap, 1 ♂ ( DZRJ)GoogleMaps  . Paratype. Same data as holotype, 1 ♂ ( DZRJ)  . Bahia: Una, Reserva Biológica de Una, riacho de 1ª ordem após a fazenda Piedade , 15°09'36''S, 39°10'31''W, 14.vi.2014, APM Santos, DM Takiya, AC Domahovski, AP Pinto & WRM Souza cols., light trap, 2 ♂ ( DZRJ), 2 ♂ ( CE- UFPE)GoogleMaps  .

APM

Algonquin Provincial Park