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

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Oxyethira (Dactylotrichia) iannuzzae

sp. nov.

Oxyethira (Dactylotrichia) iannuzzae sp. nov.

Fig 2A–2 View 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, 2 View FIGURE 2 C).

Male genitalia: Segment VIII annular, covered with setae; sternum with deep, U-shaped posteromesal incision ( Fig. 2A View FIGURE 2 ); tergum subrectangular with posterior margin slightly concave ( Fig. 2 View FIGURE 2 B). Segment IX retracted in segment VIII; anterior margin truncate and reaching anterior area of segment VI ( Figs. 2A, 2 View FIGURE 2 B); with pair of small midlateral processes projecting posterodorsad ( Fig. 2 View FIGURE 2 B), tergum reduced. Inferior appendages elongate; in ventral view, curved posterolaterad, with apices diverging, truncate, and darkened ( Fig. 2A View FIGURE 2 ); in lateral view, curved upward ( Fig. 2 View 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, 2 View 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, 2 View FIGURE 2 B). Tergum X membranous. Phallus simple, subapically with elongate, sinuous, and acute process; apex with small hook ( Fig. 2 View 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 .


Algonquin Provincial Park