Chimarrhodella paria, Blahnik, Roger J., 2004

Blahnik, Roger J., 2004, New species of Chimarrhodella from Venezuela and Ecuador (Trichoptera: Philopotamidae), Zootaxa 552, pp. 1-7 : 4-6

Chimarrhodella paria , new species

( Fig. 2 A–D)

This species is a very close sister species to Chimarrhodella nigra Flint. The male shares with that species an elongate narrow tergum X with an upturned dorsomesal spinelike process, and like both C. nigra and C. tobagoensis (and also C. ornata , n. sp.) lacks phallic spines. It can be distinguished from C. nigra by the position of the spine on tergum X, which emerges from the middle of the segment, rather than the base, and by the shape of the hooklike posterodorsal processes of tergum IX, which are basally enlarged and narrow apically. Additionally, it differs from C. nigra in coloration. Chimarrhodella nigra is uniformly black in color, whereas C. paria , while being generally black or blackish overall, has the antennae and legs paler. No structural differences were observed to separate females of C. paria from either C. nigra or C. tobagoensis , and consequently the female of C. paria was not figured. The female of C. tobagoensis was figured by Blahnik and Holzenthal, 1992, figs. 16A, B. All of these species, however, are separable by their coloration, black overall in C. nigra , black with paler antennae and legs in C. paria , and pale stramineous overall in C. tobagoensis . Specimens of Chimarrhodella tobagoensis also differ in being considerably smaller in size.

Adult. Forewing length: male 5.2­6.8 mm, female 6.0­ 7.2 mm. General color, dark brown, head blackish; frontal setal wart, palps and femora yellowish, associated setae yellowish­brown or golden; crossveins of forewing chord white; head elongate, flattened, ocelli distinct.

Male. Segment IX very short ventrally; anterolateral margin slightly concave; posterior margin with subacute, setose dorsolateral expansions, extending nearly linearly to ventral margin; Posterodorsal margin with paired, hooklike processes, each with basal part enlarged and apex much narrowed; ventral process absent. Tergum X narrow, elongate, divided apically, lateral margins sensillate; tergum mesally with upturned spinelike process emerging near middle of segment. Preanal appendages narrow, elongate, subequal in length to tergum X. Inferior appendage elongate, linear; as viewed ventrally, narrowed and slightly mesally curved in distal half. Phallic apparatus: phallobase tubular with basodorsal expansion, apicoventral margin acute and downcurved; endotheca without spines, membranous hoodlike apicodorsal expansion present; internally with short pleated membrane basally and moderately distinct apicoventral phallotremal sclerite.

Female. Genitalia diagnostically indistinguishable from C. tobagoensis ( Blahnik and Holzenthal, 1992, figs. 16A, B).

Holotype male ( UMSP 000048319): VENEZUELA: Sucre: Peninsula de Paria , Santa Isabel, Río Santa Isabel, 10°44.294'N, 62°38.954'W, el 20 m, 4.iv.1995, Holzenthal, Flint, Cressa ( UMSP).

Paratypes: VENEZUELA: Sucre: same data as holotype— 3 males, 5 females ( UMSP); Peninsula de Paria , Puerto Viejo, "Río el Pozo", 10°43.073'N, 62°28.569'W, el 20 m, 3.iv.1995, Holzenthal, Flint, Cressa— 2 males, 5 females ( UMSP); Peninsula de Paria , Puerto Viejo, Río Puerto Viejo, 10°43.137'N, 62°28.743'W, el 15 m, 2.iv.1995, Holzenthal, Flint, Cressa— 12 males, 2 females ( UMSP, NMNH, IZAM).

Etymology. This species is named paria for the Peninsula de Paria in Venezuela where the type series was collected.

Figures

FIGURE 2. Chimarrhodella paria, new species. Male genitalia: 2 A—lateral view; 2 B—dorsal view, segments IX and X; 2 C—ventral view; 2 D—phallic apparatus, lateral view.