Five new species of Polycentropodidae (Trichoptera) from Ecuador and Venezuela Author Hamilton, Steven W. Author Holzenthal, Ralph W. text Zootaxa 2005 810 1 14 journal article 10.5281/zenodo.170590 22b7f18d-d80f-41c9-a21b-7d4114bd504a 1175­5326 170590 Polyplectropus beccus Hamilton and Holzenthal , new species Fig. 5 , 6 While wing venation indicates affinities to the New World Polyplectropus ( Fig. 5 ), the male genitalia resemble no known New or Old World species of this genus ( Fig. 6 ). The shape of the preanal appendage ( Fig. 6 A, B & D) is unique among Polyplectropus , and to our knowledge all known polycentropodids. The 4, heavy and truncate setae on the dorsal lobe and the bifurcate posterior process of the preanal appendage ( Fig. 6 A & B) are diagnostic. The phallus has a pair of large, symmetrical spines in the phallic membranes ( Fig. 6 E), an elongate phallic sclerite ( Fig. 6 E & F), and a bluntly forked process in the apicodorsal phallic membranes ( Fig. 6 G). The inferior appendages ( Fig. 6 A, C & D) resemble New World Polycentropus in the medial connection more than they resemble those of Polyplectropus , which are often broadly joined. Adult. Length of forewing: male 5.5–6.5 mm (n=3). Body pale brown to yellow, legs stramineous, dorsum of head and thorax brown, clothed with long, dark setae; general vestiture of forewing with fine brown to dark brown setae, with many small patches of golden setae, base of forewing with long, erect setae. Male. Genitalia as in Fig. 6 . Posteromesal region of tergum VIII produced posteriad, shelf­like, with apical patch of microsetae. Sternum IX in lateral view subquadrate, in ventral view quadrate; anterior margin emarginate, posterior margin slightly produced medially. Tergum IX and X membranous, very reduced. Intermediate appendage absent. Preanal appendage very short, densely setose, with patch of stout, blunt setae apically, rounded, broad basally; mesoventral process triangular, directed ventrad, apex bifurcate, beak­like, with sclerotized dorsal branch and more slender, less sclerotized, closely appressed ventral branch. Inferior appendage densely setose, elongate, dorsoventral height less than length; dorsolateral flange an elongate lobe; ventrally with short, lobate projection. Phallobase moderately elongate; apicoventral projection absent; phallic membranes with single pair of long, curved spines; phallic sclerite oval, moderately elongate, apicolateral corners acute. Subphallic sclerite absent, but subphallic semisclerotized band connecting bases of preanal appendages beneath phallus. FIGURE 5. Polycentropus beccus , new species . Wings: A—forewing; B—hind wing. Holotype male: VENEZUELA : T. F. Amazonas [=Estado Amazonas]: Puerto Ayacucho ( 40 km S), El Tobogan, Caño Coromoto, 24 January 1989 , malaise, P.J. Spangler, R.A. Faitoute, C.B. Barr ( NMNH ). Paratypes : VENEZUELA : T. F. Amazonas [=Estado Amazonas]: Puerto Ayacucho ( 29 km S), Río Agua Blanca, 17 November 1987 , P.J. Spangler, R.A. Faitoute— 1 male ( NMNH ); same data as holotype— 1 male ( UMSP ). Etymology. From beccus , Latin for beak or bill, referring to the bifurcate process of the preanal appendage that resembles a birds beak in lateral aspect.