Phylloicus paucartambo, Prather, 2003

PRATHER, AYSHA L., 2003, Revision of the Neotropical caddisfly genus Phylloicus (Trichoptera: Calamoceratidae), Zootaxa 275 (1), pp. 1-214 : 84-86

Phylloicus paucartambo , new species

Figs. 86 , 87 , 113

Phylloicus "n. sp. 1" Flint, 1996:424

Phylloicus paucartambo is most similar to P. flinti , from which it is easily distinguished by the very different wing patterns of the two species. The forewing of P. paucartambo has a distinctive pattern of orange on dark brown or black ( Fig. 113 ). None of the male specimens had the phallic endotheca fully everted, so I am unable to describe the membranous lobes.

Adult. Forewing length 9.7­11.4 mm, n = 7.

Head black. Maxillary palps black. Antenna twice forewing length; black, with narrow patches of pale sensilla on anteromesal surface of each flagellomere. Dorsal pterothorax black; ventrolateral thorax golden brown. Femora golden brown; tibiae black; tarsi black. Metathoracic leg of male with posterior fringe of long setae, setae dark. Tibial spur formula 2,4,4. Forewing flat; dark brown, or black; with two transverse bands; proximal band orange, reaching posterior wing margin, at least 1/2 width of wing, an inverted V­shape; distal band orange, not reaching either wing margin, 1/2 width of wing or less; with two basal stripes, orange; with small orange spot marking nygma ( Fig. 113 ).

Male. Preterminalic abdominal terga with anteromesal notch. Corematic structures present. Tergum III with acute anterolateral process and posterolaterally acute lateral sclerites. Tergum IV with paired posterior processes and paired lateral sclerites, mesal coremata and lateral coremata; posterior process short, rounded; lateral sclerite spatulate, directed laterally; lateral coremata with basal globose lobes and long tubular posterior lobe; mesal coremata bilobed and an invaginated setose pouch, pouch enclosing digitate membranous lobes. Tergum V without sclerotized modifications ( Fig. 86F ). Sternum VII with short, acute anteromesal process. Sternum VIII enclosing base of elongate sternum IX; posteromesal process truncate and hollow ( Fig. 86A, C ). Tergum IX without mesal ridge; posterior margin smoothly rounded; anterior ridge obsolete mesally ( Fig. 86B ); lateral ridge present; dorsal pleural setae continuous with ventral pleural setae, dense ( Fig. 86A ). Preanal appendage approximately length of tergum X, of uniform diameter throughout length, setae long, but not filamentous or longer than appendage ( Fig. 86A, B ). Tergum X without basal lobes; basodorsal process broad and setose; basolateral processes long, length at least twice diameter; apex, in lateral view, truncate, in dorsal view, entire or notched, notch round ( Fig. 86A, B ). Harpago rounded; peglike setae few, apical ( Fig. 86A, C ). Phallotremal sclerites average size, longest dimension less than diameter of phallobase; dorsal sclerite ovoid, in dorsal view horseshoe­shaped ( Fig. 86D, E ).

Female. Preterminal abdominal terga without anteromesal notches. 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. 87C ). Tergum IX without mesal ridge ( Fig. 87B ). Sternum IX anterior and posterior lobes darkly sclerotized and striate, with patch of lightly sclerotized cuticle laterally ( Fig. 87A ). Tergum X appendage shorter than mesal lobe, base distinct, apex oblique; mesal lobe lightly sclerotized; digitate lateral processes long, at least twice diameter and often asymmetrical ( Fig. 87B ). Sternum X with patches of short fine setae posterolaterally to anal opening ( Fig. 87A ). Vaginal apparatus posterior sclerite elongate; anterior sclerite emarginate anteriorly, posterolateral projections absent; posterior sclerite triangular; posterior end of spermatheca a sclerotized expanded tube ( Fig. 87A ).

Holotype male: PERU: Cuzco: Paucartambo to Pilcopata rd., Río San Pedro @ Puente San Pedro , 13°03'18”S, 71°32'47"W, 1445 m, 24.vi.1993, Blahnik & Pescador ( MHNJP).

Paratypes: ECUADOR: Napo: Reventador , 1750 m, 3­6.x.1977, Peña G. — 1 female ( NMNH) ; PERU: Cuzco: Paucartambo to Pilcopata rd., river at Puente Unión , 13°04'13”S, 71°34'00"W, 1670 m, 21­23.vi.1993, Blahnik & Pescador — 1 female ( NMNH) ; Paucartambo, Pte. San Pedro , ca. 50 km NW Pilcopata km 152, 13°09'00”S, 71°26'00"W, 1430 m, 2­3.ix.1988, Flint & Adams — 1 female, 1 male ( MHNJP) ; — 1 male ( NMNH) ; 30­31.viii.1989, Adams — 1 male ( NMNH) ; — 1 male ( UMSP) .

Distribution. Peru, Ecuador.

Etymology. Named for the type locality, the town of Paucartambo, Peru.

Figures

FIGURE 86. Phylloicus paucartambo. Male (A­C, holotype; D­E, UMSP000010037): A—lateral view; B—dorsal view; C—sterna VIII, IX, and inferior appendages, ventral view; D—phallus, lateral view; E—phallotremal sclerites, dorsal view; F—terga III­V, dorsal view.

FIGURE 87. Phylloicus paucartambo. Female (UMSP000010032): A—sterna IX, X and vaginal apparatus, ventral view; B—terga IX and X, dorsal view; C—sternum VIII, ventral view.

FIGURES 113-116. — 113. Phylloicus paucartambo (composite of UMSP000010031-8). Forewing. — 114. Phylloicus pulchrus (composite of UMSP000009766 and UMSP000068395). Forewing. — 115. Phylloicus superbus (UMSP000009816 and UMSP000009824). Forewing. — 116. Phylloicus yolandae (holotype). Forewing.