Phylloicus amazonas, Prather, 2003

PRATHER, AYSHA L., 2003, Revision of the Neotropical caddisfly genus Phylloicus (Trichoptera: Calamoceratidae), Zootaxa 275 (1), pp. 1-214 : 26-27

Phylloicus amazonas , new species

Figs. 17 , 18 , 106

The male genitalia of P. amazonas are most similar to those of P. chalybeus , but these two species differ in the distinctive wing pattern of P. amazonas . The wing pattern ( Fig. 106 ) is similar to P. paprockii ( Fig. 112 ), but differs in the black border of the large white patch.

Adult. Forewing length 8.2­ 9 mm, n = 9.

Head golden brown. Maxillary palps golden brown, covered with dark brown setae. Antenna twice forewing length; golden brown. Dorsal pterothorax golden brown; ventrolateral thorax golden brown. Legs golden brown. Metathoracic leg of male without posterior fringe. Tibial spur formula 2,4,2. Forewing flat; dark brown; with single transverse band; distal band white, not reaching either wing margin, 1/2 width of wing or less, oval, bordered with black; with single basal stripe, golden; sparse patches of white or ivory setae in basal cells; large dark patch and sparse white setae at location of proximal band ( Fig. 106 ). Hind wing basal brush present in female.

Male. Preterminalic abdominal terga without anteromesal notches. 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 without mesal ridge; posterior margin smoothly rounded ( Fig. 17B ); lateral ridge absent; dorsal pleural setae approximately 4, ventral pleural setae approximately 2 ( Fig. 17A ); sternum IX without mesolateral ridges; sternum IX ( Fig. 17C ). Preanal appendage approximately length of tergum X, of uniform diameter throughout length, setae long, but not filamentous or longer than appendage ( Fig. 17A, B ). Tergum X without basal lobes; basodorsal process long and digitate; basolateral processes long, length at least twice diameter; apex, in lateral view, rounded, in dorsal view, notched, notch round; apicodorsal and dorsolateral margins bearing single row of short fine setae ( Fig. 17A, B ). Harpago long, curving mesally and tapering apically; peglike setae absent ( Fig. 17A, C ). Phallic endotheca with single long apical lobe and paired basolateral lobes, basolateral lobes multilobed; phallotremal sclerites very large, longest dimension twice diameter of phallobase; dorsal sclerite two­armed, in lateral view U­shaped ( Fig. 17D, E ).

Female. Preterminal abdominal terga without anteromesal notches. Sternum VII with short pointed anteromesal process. Tergum VIII without posterolateral brush; sternum VIII cleft posteromesally to anterior ridge; sternum VIII ( Fig. 18C ). Tergum IX without mesal ridge ( Fig. 18B ). Sternum IX anterior and posterior lobes darkly sclerotized and striate, with deep sublateral invaginations ( Fig. 18A ). Tergum X appendage shorter than mesal lobe, base indistinct, apex triangular; mesal lobe lightly sclerotized; digitate lateral processes absent ( Fig. 18B ). Sternum X with patches of short fine setae posterolaterally to anal opening ( Fig. 18A ). Vaginal apparatus anterior and posterior sclerites equal in length; anterior sclerite truncate anteriorly, posterolateral projections acute; posterior sclerite ovoid; posterior end of spermatheca a sclerotized ovoid ( Fig. 18A ).

Holotype male: VENEZUELA: Amazonas: Cerro de la Neblina, Basecamp, 00°51'N 66°10'W, 140 m, 10­20.ii.1985, Spangler, Faitoute, & Steiner ( NMNH).

Paratypes: BRAZIL: Amazonas: Manaus, Ponta Negra , 19.xi.1976, Penny — 1 male ( INPA) ; Res. Ducke , 26 km E Manaus, 29.x.1976 — 1 female ( INPA) ; GUYANA: Nouveau Chantier, May, Le Moult — 1 male ( MCZ) ; Warniabo Cr., Dubulay Ranch, 05°39'48”N, 57°53'24"E, 10­11.iv.1994, Flint — 2 females ( NMNH) ; 14­19.iv.1995, Flint — 1 male ( NMNH) ; PERU: Loreto: Callicebus Research Station, Mishana, Río Nanay , 25 km SW Iquitos, 120 m, 10­17.i. 1980, Heppner — 1 female, 1 male ( NMNH) .

Distribution. Brazil, Guyana, Peru, Venezuela.

Etymology. This species is named for the Brazilian and Venezuelan states of Amazonas, where it was collected.

Figures

FIGURE 17. Phylloicus amazonas. Male (holotype): A—lateral view; B—dorsal view; C—ventral view; D—phallus, lateral view; E—phallus, caudoventral view.

FIGURE 18. Phylloicus amazonas. Female (UMSP000068387): A—sterna IX, X and vaginal apparatus, ventral view; B—terga IX and X, dorsal view; C—sternum VIII, ventral view.

FIGURES 105-108. — 105. Phylloicus aeneus (composite of UMSP000068398, UMSP000068399, UMSP000068400). Forewing. — 106. Phylloicus amazonas (composite of UMSP000005724-5, UMSP000068383-9). Forewing. — 107. Phylloicus bicarinatus (composite of UMSP000068393 and UMSP000068394). Forewing. — 108. Phylloicus cubanus (composite of UMSP000009806 and UMSP000009807). Forewing.

FIGURES 109-112. — 109. Phylloicus elegans (composite of UMSP000000172 and UMSP000022365). Forewing. — 110. Phylloicus flinti (UMSP000010104). Forewing. — 111. Phylloicus iridescens (composite of UMSP000009750 and UMSP000009751). Forewing. — 112. Phylloicus paprockii (composite of UMSP000068390-2). Forewing.