Phylloicus fenestratus Flint, 1974

PRATHER, AYSHA L., 2003, Revision of the Neotropical caddisfly genus Phylloicus (Trichoptera: Calamoceratidae), Zootaxa 275 (1), pp. 1-214 : 53-55

Phylloicus fenestratus Flint

Figs. 51 , 52

Phylloicus fenestratus Flint, 1974b:139 [Type locality: Surinam, Nickerie River, Stondansi ; RNH; male]; 1996:425 [distribution].

Phylloicus fenestratus is distinguished by the forewing pattern, which consists of a chestnut brown wing with narrow proximal and distal bands of white, a patch of white in the proximal half of cell Cu 2, and cells R 1, R, thyridial and 1 st M cells clear proximally. The male abdomen is distinguished by the absence of — coremata or tergal modifications, and tergum X is fusiform ( Fig. 51A, B ). The phallus is sharply curved basally, although the curvature varies in degree ( Fig. 51D ).

Adult. Forewing length 7.3­9.2 mm, n = 53.

Head chestnut brown, with dorsomesal crest of chestnut brown setae. Maxillary palps dark brown. Antenna twice forewing length; chestnut brown, with narrow patches of pale sensilla on anteromesal surface of each flagellomere. Dorsal pterothorax chestnut brown; ventrolateral thorax golden brown. Femora golden brown; foretibiae golden brown; mesotibiae dark brown; metatibiae dark brown; foretarsi golden brown; mesotarsi white; metatarsi dark brown. Metathoracic leg of male without posterior fringe. Tibial spur formula 2,4,4. Forewing flat; chestnut brown; with two transverse bands; proximal band white, reaching posterior wing margin, at least 1/2 width of wing, narrow, less than 10 setae wide; distal band white, beginning at anterior wing margin, at least 1/2 width of wing, narrow, less than 10 setae wide; with single basal stripe, white; proximal half of basal cells clear. Hind wing basal brush present in male and female, dark brown; female brush short.

Male. Preterminalic abdominal terga with anteromesal notch. Corematic structures absent, terga III­V unmodified, without membranous lobes or sclerotized processes. Sternum VII with short, acute anteromesal process. Sternum VIII similar to anterior sterna, sternum IX not elongate. Tergum IX with mesal ridge extending full length of segment; posterior margin notched ( Fig. 51B ); lateral ridge present; dorsal pleural setae approximately 15, ventral pleural setae approximately 2 ( Fig. 51A ); sternum IX with paired mesolateral ridges; sternum IX ( Fig. 51C ). Preanal appendage shorter than tergum X, but greater than 2/3 length, of uniform diameter throughout length, setae long, but not filamentous or longer than appendage ( Fig. 51A, B ). Tergum X without basal lobes; basodorsal process absent; basolateral processes absent; apex, in lateral view, acute, in dorsal view, entire; covered with short setae basodorsally ( Fig. 51A, B ). Harpago slightly tapered; peglike setae tiny, mesal ( Fig. 51A, C ). Phallic endotheca with paired apicolateral lobes and paired basolateral lobes, basolateral lobes digitate, apicolateral lobes rounded and setose; phallotremal sclerites average size, longest dimension less than diameter of phallobase; dorsal sclerite ovoid, in dorsal view horseshoe­shaped ( Fig. 51D, E ).

Female. Preterminal abdominal terga with anteromesal notch. Sternum VII with short pointed anteromesal process. Tergum VIII without posterolateral brush; sternum VIII cleft posteromesally to anterior ridge; sternum VIII ( Fig. 52C ). Tergum IX without mesal ridge ( Fig. 52B ). Sternum IX anterior and posterior lobes darkly sclerotized and striate, with deep sublateral invaginations ( Fig. 52A ). Tergum X appendage longer than mesal lobe, base distinct, apex rounded; mesal lobe lightly sclerotized; digitate lateral processes absent ( Fig. 52B ). Sternum X with single pair of fine setae in membrane lateral to anal opening ( Fig. 52A ). Vaginal apparatus anterior and posterior sclerites equal in length; anterior sclerite truncate anteriorly, posterolateral projections absent; posterior sclerite triangular; posterior end of spermatheca a sclerotized cone ( Fig. 52A ).

Material examined. BRAZIL: Amazonas: Am. 010, km 246, 20 km W Itacoatiara, 12­15.vii.1979, Arias et al. — 1 male ( NMNH) ; Hyutanahã, Rio Purus , 1.xii.1921, Klages — 1 male ( CMNH) ; Manaus , 2.vii.1976, Serrano — 1 female ( NMNH) ; Tefe , 26.xii., Parish — 1 male ( MCZ) ; Manaus, Est. Aleixo , 18.v.1976, DeLome — 1 female ( INPA) ; Itacoatiara , km 244, 19.i.1977, Penny — 1 male ( INPA) ; Res. Ducke , 26 km E Manaus, 30.ix.1986, Luis — 3 males, 9 females ( INPA) ; Paraíba: Olivedos , 9.ix., Parish — 1 adult ( MCZ) ; Parana: Rio Xingu , camp ca. 60 km S Altamira, 1st jungle stream trail 1, 03°39'00”S, 52°22'00"W, 2­8.x.1986, Spangler & Flint — 3 males ( NMNH) ; Rondonia: Cacaulândia , 140 m, 1.xi.1994, Becker — 1 male ( NMNH) ; Roraima: Serra Pacaraima , 27.viii.1987, Rafael, Aquino, Vidal, & Binda — 4 males, 1 female ( INPA) ; ECUADOR: Napo: Puerto Montufar , 27.iv.1976, Cohen — 1 female ( NMNH) ; 28.iv.1976, Cohen — 3 males ( NMNH) ; Pastaza: Cononaco , 29.v.1976, Cohen — 3 males ( NMNH) ; — 1 male ( UMSP) ; GUYANA: Warniabo Cr., Dubulay Ranch , 05°39'48”N, 57°53'24"E, 14­ 19.iv.1995, Flint — 1 male ( NMNH) ; Bartica District, Kartabo , 10.iii.1924 — 1 female ( AMNH) ; PERU: Loreto: Iquitos , 6.ii., Parish — 1 female ( MCZ) ; Yurimaguas — 1 male ( BMNH) ; 1.iv., Parish — 1 male ( MCZ) ; Madre de Dios: Río Tambopata Res., 30 km (air) SW Pto. Maldonado , 12°50'00”S, 69°17'00"W, 290 m — 1 female ( NMNH) ; Manu Biosphere Res., Pakitza Bio. Sta. , 11°56'00”S, 71°18'00"W, 350 m, 4.x.1987, Pogue — 1 male ( UMSP) ; trail 1, marker 8, 11°56'00”S, 71°18'00"W, 250 m, 11­13.ix.1989, Adams — 1 male ( NMNH) ; trail 2, marker 18, 11°56'00”S, 71°18'00"W, 250 m, 12­23.ix.1989, Adams et al. — 1 male ( NMNH) ; Quebrada Paujil­Picoflor , 11°56'39”S, 71°16'59"W, 350 m, 5.vii.1993, Blahnik & Pescador — 1 male ( NMNH) ; SURINAME: Sipaliwini: Nickerie River, Blanche Marie , 12.ii.1971, Geijskes — 1 male paratype ( NMNH) ; Nickerie River, Stondansi , 31.i.1971, Geijskes — holotype male ( RNH) ; VENEZUELA: Amazonas: Cerro de la Neblina, Basecamp , 00°51'N 66°10'W, 140 m, 4­12.ii.1984, Davis & McCabe — 1 male ( NMNH) ; 23­29.ii.1984, Davis & McCabe — 1 female ( NMNH) ; 21­ 28.ii.1985, Spangler, Faitoute, & Steiner — 1 female ( NMNH) ; 23.ii.1985, Spangler, Faitoute, & Steiner — 1 male ( NMNH) ; Camp V, 00°49'00”N, 66°00'00"W, 1250 m, 23­ 24.iii.1984, Flint — 1 male ( NMNH) .

Distribution. Brazil, Ecuador, Guyana, Peru, Suriname, Venezuela.

Figures

FIGURE 51. Phylloicus fenestratus. Male (holotype): A—lateral view; B—dorsal view; C— sternum IX and inferior appendages, ventral view; D—phallus, lateral view. E—phallotremal sclerites, dorsal view.

FIGURE 52. Phylloicus fenestratus. Female (UMSP000067850): A—sterna IX, X and vaginal apparatus, ventral view; B—terga IX and X, dorsal view; C—sternum VIII, ventral view.