Phylloicus perija, Prather, 2003

PRATHER, AYSHA L., 2003, Revision of the Neotropical caddisfly genus Phylloicus (Trichoptera: Calamoceratidae), Zootaxa 275 (1), pp. 1-214 : 86-87

Phylloicus perija , new species

Figs. 88 , 89

Phylloicus perija is most similar to P. abdominalis and P. pirapo . However, it differs in the contorted shape of the tergum IV lateral sclerite, and the setose posterior process of tergum V ( Fig. 88F ) and in the forewing pattern. The forewing lacks the white spot on the nygma, and the wing bands are golden rather than white or ivory.

Adult. Forewing length 10.1­12.8 mm, n = 24.

Head chestnut brown. Maxillary palps chestnut brown. Antenna twice forewing length; chestnut brown, with narrow patches of pale sensilla on anteromesal surface of each flagellomere. Dorsal pterothorax golden brown; ventrolateral thorax golden brown. Legs golden brown. Tibial spur formula 2,4,4. Forewing flat; chestnut brown; with two transverse bands; proximal band golden, reaching posterior wing margin, at least 1/2 width of wing; distal band golden, beginning at anterior wing margin, at least 1/2 width of wing; with two basal stripes, golden; small patch of golden setae at proximal end of wing coupling hairs. Hind wing basal brush present in male and female.

Male. Preterminalic abdominal terga with anteromesal notch. Corematic structures present. Tergum III with anterolateral flanges. Tergum IV with paired posterior processes and paired lateral sclerites, mesal coremata and lateral coremata; posterior process truncate; lateral sclerite contorted, setose apically; lateral coremata with basal globose lobes and long tubular posterior lobe; mesal coremata bilobed, without setae, capable of inflation greater than length of segment V. Tergum V emarginate posteriorly, with setose posterior processes ( Fig. 88F ). Sternum VII with short, acute anteromesal process. Sternum VIII enclosing base of elongate sternum IX; posteromesal process notched ( Fig. 88A, C ). Tergum IX without mesal ridge; posterior margin obtuse; thinly sclerotized anteromesally, muriculate ( Fig. 88B ); lateral ridge absent; dorsal pleural setae approximately 8, ventral pleural setae absent ( Fig. 88B ). Preanal appendage longer than tergum X, but less than 11/ 2 times length, widest apically, setae filamentous, longer than appendage ( Fig. 88A, B ). Tergum X without basal lobes; basodorsal process short and digitate; basolateral processes absent; apex, in lateral view, rounded, in dorsal view, entire or notched, notch shallow ( Fig. 88A, B ). Harpago rounded; peglike setae few, apical ( Fig. 88A, C ). Phallic endotheca with paired basolateral lobes, basolateral lobes large and round; phallotremal sclerites average size, longest dimension less than diameter of phallobase; dorsal sclerite ovoid, in dorsal view horseshoe­shaped ( Fig. 88D, E ).

Female. Preterminal abdominal terga with anteromesal notch. Sternum VII with short pointed anteromesal process. Tergum VIII without posterolateral brush; sternum VIII posterior margin entire; sternum VIII ( Fig. 89C ). Tergum IX without mesal ridge ( Fig. 89B ). Sternum IX anterior and posterior lobes darkly sclerotized and striate, with patch of lightly sclerotized cuticle lateral to vaginal opening ( Fig. 89A ). Tergum X appendage shorter than mesal lobe, base indistinct, apex oblique; mesal lobe lightly sclerotized; digitate lateral processes length approximately equal diameter ( Fig. 89B ). Sternum X with patches of short fine setae posterolaterally to anal opening ( Fig. 89A ). Vaginal apparatus anterior and posterior sclerites equal in length; anterior sclerite rounded anteriorly, posterolateral projections absent; posterior sclerite ovoid ( Fig. 89A ).

Holotype male: VENEZUELA: Zulia: Parque Nacional Perijá, Río Negro in Toromo , 10°03'04”N, 72°42'43"W, 360 m, 15.i.1994, Holzenthal, Cressa, & Rincón ( UMSP).

Paratypes: VENEZUELA: Zulia: Perijá El Tucuco, Mission El Tucuco, Río del Pelaya , 2­1/ 2 km from church, 26.iv.1981, Townes — 1 male ( NMNH) ; Parque Nacional Perijá, Río Negro in Toromo , 10°03'04”N, 72°42'43"W, 360 m, 15.i.1994, Holzenthal, Cressa, & Rincón — 5 females ( IZAM) ; — 1 female, 1 male ( NMNH) ; — 11 females, 4 males ( UMSP) .

Distribution. Venezuela.

Etymology. Named for the type locality, Perijá National Park, Venezuela.

Figures

FIGURE 88. Phylloicus perija. Male (UMSP000000178): A—lateral view; B—dorsal view; C— sterna VIII, IX, and inferior appendages, ventral view; D—phallus, lateral view; E—phallus, caudoventral view; F—terga III­V, dorsal view.

FIGURE 89. Phylloicus perija. Female (UMSP000217073): A—sterna IX, X and vaginal apparatus, ventral view; B—terga IX and X, dorsal view; C—sternum VIII, ventral view.