Alisotrichia ubatuba, Santos, Allan Paulo Moreira, 2011

Santos, Allan Paulo Moreira, 2011, Four new species of the microcaddisfly genus Alisotrichia Flint (Trichoptera: Hydroptilidae) from southeastern Brazil, Zootaxa 3112, pp. 59-68 : 62-64

Alisotrichia ubatuba sp. nov.

( Figs. 9–15 )

Diagnosis. Although this new species lacks the lateral sclerites on male segment X, it is tentatively placed in the A. hirudopsis Group based on other male genitalia features, particularly the pair of apical spine-like processes on the posterior margin of segment VIII. This new species is more similar to A. viuda Harris & Flint, 2002 , but it differs by bearing only 1 pair of straight spine-like processes on the posterior margin of segment VIII ( A. viuda has 2 pairs of sclerotized processes) and by the short phallus, with a median constriction, and the apical portion with sclerotized lateral edges (in A. viuda , the phallus is slender and elongate with subapical spines).

Description. Male body. Length 1.7 mm (n=2). General color in ethanol light brown. Antennae each with 18 articles; scape enlarged, semicircular in anterior view ( Fig. 9 ); pedicel slightly longer than broad; flagellomeres short and setose; apical article tapering ( Fig. 9 ). Ocelli 2. Maxillary palpi each 5-articulated; labial palpi each 3- articulated. Mesoscutellum with transverse suture. Metascutellum approximately rectangular. Tibial spurs 0,2,4. Fore- and hind wings with long brown setae. Abdominal segment VII with ventromesal process ( Figs. 10, 12 ).

Male genitalia. Segment VIII, in ventral view, with pair of stout spine-like processes on posterior margin ( Fig. 10 ). Segment IX fused with segment X in dorsal view ( Fig. 11 ); reduced ventrally; pair of slender apodemes from anterolateral margins reaching segment VII internally ( Fig. 10 ). Segment X short, almost quadrangular in dorsal view ( Fig. 11 ). Subgenital plate short, mesally with several short spines; posterior margin rounded ( Fig. 10 ). Inferior appendages absent. Phallus short, constricted mesally; apical half with lateral edges more sclerotized, mesal area membranous with tubular internal structure, and with ejaculatory duct protruding subapically ( Fig. 13 ).

Female body. Length 1.8 mm (n=1). General color in alcohol light brown. Antennae each with 17; scape simple. Ocelli 3. Other features of head and thorax as in male. Abdominal segment VI with short mesal process. Segment VII with elongate and setose mesal process dorsally; with plumose setae on ventral surface.

Female genitalia. Segment VIII with ring of setae ( Fig. 14 ); pair of elongate and slender apodemes from anterolateral margins reaching anterior portion of segment VI internally ( Fig. 14 ). Segment IX short; pair of elongate apodemes from anterolateral margins reaching posterior portion of segment VI internally ( Fig. 14 ). Segment X short, rounded, with pair of apical papillae ( Fig. 14 ). Bursa copulatrix with anterior portion wide, lateral margins emarginated; posterior portion long and slender ( Fig. 15 ).

Material examined. Holotype male. BRAZIL, São Paulo State, Ubatuba municipality, Rio Canoas, 23°20’18,7”S 44°50’ 16,8W, 475 m, 18.vi.2004, A.A. Huamantinco & J.L. Nessimian leg., light trap ( DZRJ). Paratypes. Same data except: 1 female ( DZRJ); same data except: Rio da Fazenda, 23°20’19.7”S 44°50’14.8”W, 31 m, 19.iv.2004, 1 male ( DZRJ).

Etymology. The species name refers to the municipality where the specimens were collected. Ubatuba means ‘canoe place’ in Tupi-guarani (Brazilian indigenous language).

Distribution. Brazil: São Paulo State.

Figures

FIGURES 9 – 13. Alisotrichia ubatuba sp. nov., 9: right male antenna, right lateral view; 10 – 13: male genitalia. 10: ventral view; 11: dorsal view; 12: left lateral view; 13: phallus, dorsal view.

FIGURES 14 – 15. Alisotrichia ubatuba sp. nov., female genitalia. 14: ventral view; 15: bursa copulatrix, ventral view.