Phylloicus elektoros, Prather, 2003

PRATHER, AYSHA L., 2003, Revision of the Neotropical caddisfly genus Phylloicus (Trichoptera: Calamoceratidae), Zootaxa 275 (1), pp. 1-214 : 48-50

Phylloicus elektoros , new species

Figs. 45 , 46

The forewings of P. elektoros are a golden ochre color, with stripes of pale tan setae between the wing veins. This species is most similar to P. auratus and brevior ; P. elektoros differs from the first two in wing coloring, the lack of coremata or tergal modifications, and in the long digitate dorsal process of the phallic endotheca. Tergum X is entire, posteriorly ( Fig. 45B )

Adult. Forewing length 9.6­10.5 mm, n = 32.

Head golden, darker anteriorly, setae on warts golden. Maxillary palps golden, covered with dark brown setae. Antenna twice forewing length; anterior surface chestnut brown, posterior surface golden, with narrow patches of pale sensilla on anteromesal surface of each flagellomere. Dorsal pterothorax golden brown, lateral margins darker; ventrolateral thorax golden. Femora golden; foretibiae golden; mesotibiae chestnut brown; metatibiae chestnut brown; foretarsi golden; mesotarsi chestnut brown; metatarsi chestnut brown. Metathoracic leg of male with posterior fringe of long setae. Tibial spur formula 2,4,4. Forewing flat; golden ochre; with longitudinal stripes; stripes pale tan. Hind wing basal brush present in male.

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 enclosing base of elongate sternum IX; posteromesal process absent and posterior margin irregular ( Fig. 45A, C ). Tergum IX without mesal ridge; posterior margin smoothly rounded; thinly sclerotized anteromesally, anterior ridge obsolete mesally ( Fig. 45B ); lateral ridge present; dorsal pleural setae approximately 10, ventral pleural setae approximately 5 ( Fig. 45A ). Preanal appendage less than 2/3 length of tergum X, of uniform diameter throughout length, setae long, but not filamentous or longer than appendage ( Fig. 45A, B ). Tergum X without basal lobes; basodorsal process absent; basolateral processes absent; apex, in lateral view, truncate, in dorsal view, entire; covered with short setae dorsally ( Fig. 45A, B ). Harpago slightly tapered; peglike setae few, apical ( Fig. 45A, C ). Phallic endotheca with single long apical lobe and paired basolateral lobes, basolateral lobes multilobed; phallotremal sclerites average size, longest dimension less than diameter of phallobase; dorsal sclerite rectangular, width greater than height ( Fig. 45D, E ).

Female. Preterminal abdominal terga with anteromesal notch. Sternum VII with short pointed anteromesal process. Tergum VIII without posterolateral brush; sternum VIII with shallow posteromesal notch, or posterior margin entire; sternum VIII ( Fig. 46C ). Tergum IX without mesal ridge ( Fig. 46B ). Sternum IX anterior and posterior lobes darkly sclerotized and striate, with patch of lightly sclerotized cuticle laterally ( Fig. 46A ). Tergum X appendage shorter than mesal lobe, base indistinct, apex oblique; mesal lobe lightly sclerotized; digitate lateral processes absent ( Fig. 46B ). Sternum X with patches of short fine setae posterolaterally to anal opening ( Fig. 46A ). 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. 46A ).

Holotype male: VENEZUELA: Amazonas: Cerro de la Neblina, Basecamp, in rainforest, 00°51'N 66°10'W, 140 m, 19.ii.1985, Spangler, Faitoute, & Steiner ( NMNH).

Paratypes: BRAZIL: Amazonas: 60 km N Manaus , 22.xi.1976, Penny — 1 female ( INPA) ; Am. 010, km 246, 20 km W Itacoatiara, 12­15.vii.1979, Arias et al. — 1 female ( NMNH) ; Res. Ducke , 26 km E Manaus, 1.x.1976, Penny — 1 female ( INPA) ; 30.ix.1986, Luis — 1 female ( NMNH) ; PERU: Loreto: Callicebus Research Station, Mishana, Río Nanay , 25 km SW Iquitos, 120 m, 10­17.i.1980, Heppner — 1 male ( NMNH) ; Madre de Dios: Río Tambopata Res., 30 km (air) SW Pto. Maldonado , 12°50'00”S, 69°17'00"W, 290 m, 2.iii.1984, Erwin et al. — 1 male ( NMNH) ; VENEZUELA: Amazonas: San Carlos de Río Negro , 6­12.xii.1984, Brown — 2 males ( NMNH) ; 13­17.xii.1984, Brown — 1 female ( NMNH) ; Cerro de la Neblina, Agua Blanca , 00°49'00”N, 66°08'00"W, 160 m, 20­ 21.iii.1984, Flint & Louton — 2 females, 2 males ( NMNH) ; Basecamp , 00°51'N 66°10'W, 140 m, 4­12.ii.1984, Davis & McCabe 1 male ( IZAM) ; — 1 female, 2 males ( NMNH) ; 13­ 20.ii.1984, Davis & McCabe — 1 female ( IZAM) ; — 1 female, 1 male ( NMNH) ; — 1 female ( UMSP) ; 1­10.iii.1984, Davis & McCabe — 1 female, 2 males ( NMNH) ; 10.ii.1985, Steiner — 1 female ( NMNH) ; 21­28.ii.1985, Spangler, Faitoute, & Steiner — 1 male ( IZAM) ; — 1 male ( NMNH) ; — 1 male ( UMSP) ; in rainforest, 00°51'N 66°10'W, 140 m, 20.ii.1985, Spangler, Faitoute, & Steiner — 1 male ( NMNH) ; nr. Río Baria , 00°51'N 66°10'W, 140 m, 17.ii.1985, Cocroft & Steiner — 1 female ( NMNH) ; small stream in rainforest, 00°51'N 66°10'W, 140 m, 8.ii.1985, Steiner — 1 male ( NMNH) ; — 1 male ( UMSP) ; 9.ii.1985, Steiner — 1 male ( NMNH) .

Distribution. Brazil, Peru, Venezuela.

Etymology. “ Elektoros,” from the Greek, meaning “the beaming sun,” referring to the sunburst­like pattern of the forewings.

Figures

FIGURE 45. Phylloicus elektoros. Male (UMSP000067705): A—lateral view; B—dorsal view; C—sterna VIII, IX, and inferior appendages, ventral view; D—phallus, lateral view; E—phallus, ventral view.

FIGURE 46. Phylloicus elektoros. Female (UMSP000067706): A—sterna IX, X and vaginal apparatus, ventral view; B—terga IX and X, dorsal view; C—sternum VIII, ventral view.