Phylloicus bicarinatus, Prather, 2003

PRATHER, AYSHA L., 2003, Revision of the Neotropical caddisfly genus Phylloicus (Trichoptera: Calamoceratidae), Zootaxa 275 (1), pp. 1-214 : 32-34

Phylloicus bicarinatus , new species

Figs. 25 , 26 , 107

This species can be distinguished by the double keel or carinae of tergum X ( Fig. 25B ). The forewing pattern is similar to that of P. elegans and lituratus and maculatus , but in P. bicarinatus the setae forming the pattern are bright white, forming a crescent­shaped proximal band, in contrast to the ivory­yellow setae and the V­shaped proximal band of the other three species.

Adult. Forewing length 9­9.9 mm, n = 28.

Head chestnut brown. Maxillary palps dark brown. Antenna twice forewing length; dark 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 dark brown; mesotibiae dark brown; metatibiae dark brown; foretarsi chestnut brown; mesotarsi dark brown; metatarsi dark brown. Metathoracic leg of male with posterior fringe of long setae, setae dark. Tibial spur formula 2,4,4. Forewing flat; black; with two transverse bands; proximal band white, extending from anterior to posterior wing margin; distal band white, beginning at anterior wing margin, at least 1/2 width of wing, widest and densest anteriorly; with single basal stripe, white ( Fig. 107 ). Hind wing basal brush present in male, dark brown.

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 notched, notch deep and round ( Fig. 25A, C ). Tergum IX without mesal ridge; posterior margin smoothly rounded; thinly sclerotized anteromesally ( Fig. 25B ); lateral ridge present; dorsal pleural setae approximately 8, ventral pleural setae absent ( Fig. 25A ). Preanal appendage less than 2/3 length of tergum X, narrowly elliptic, setae long, but not filamentous or longer than appendage ( Fig. 25A, B ). Tergum X without basal lobes; basodorsal process short and bifid; basolateral processes short, length less than or equal to diameter; apex, in lateral view, rounded, in dorsal view, notched, notch shallow; with paired mesal carinae ( Fig. 25A, B ). Harpago slightly tapered; peglike setae few, apical ( Fig. 25A, C ). Phallic endotheca with paired basolateral lobes, basolateral lobes tapered apically; phallotremal sclerites average size, longest dimension less than diameter of phallobase; dorsal sclerite ovoid, in dorsal view horseshoe­shaped ( Fig. 25D, 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. 26C ). Tergum IX with very short mesal ridge ( Fig. 26B ). Sternum IX anterior and posterior lobes darkly sclerotized and striate, with patch of lightly sclerotized cuticle lateral to vaginal opening ( Fig. 26A ). Tergum X appendage shorter than mesal lobe, base indistinct, apex oblique; mesal lobe lightly sclerotized; digitate lateral processes long, at least twice diameter and often asymmetrical ( Fig. 26B ). Sternum X with patches of short fine setae posterolaterally to anal opening ( Fig. 26A ). Vaginal apparatus anterior and posterior sclerites equal in length; anterior sclerite truncate anteriorly, posterolateral projections absent; posterior sclerite ovoid ( Fig. 26A ).

Holotype male: PERU: Madre de Dios: Manu Biosphere Res., Pakitza Bio. Sta., Quebrada Trompetero , trail 2, marker 15, 11°56'39”S, 71°16'59"W, 350 m, 3.vii.1993, Blahnik & Pescador ( MHNJP).

Paratypes: BOLIVIA: La Paz: Río Alto Beni, Palos Blancos , 600 m, 11­15.i.1976, Peña G. — 1 male ( NMNH) ; Santa Cruz: Sara , 450 m, Steinbach — 1 male ( CMNH) ; PERU: Cuzco: Quincemil , xi.1962, Peña G. — 1 male ( CNC) ; — 2 males ( NMNH) ; Madre de Dios: Toma del Agua, Amazonia Lodge , 12°52'13”S, 71°22'34"W, 415 m, 29.vi.1993, Blahnik & Pescador — 1 male ( NMNH) ; — 1 male ( UMSP) ; Manu Biosphere Res., Pakitza Bio. Sta. , 11°56'00”S, 71°18'00"W, 350 m, 30.ix.1987, Pogue — 1 male ( NMNH) ; 01­13­03­99, 11°56'00”S, 71°18'00"W, 350 m, 2.x.1987, Pogue — 1 male ( NMNH) ; Aquajal , 11°56'00”S, 71°18'00"W, 250 m, 12.ix.1988, Pogue — 2 males ( NMNH) ; trail 1, marker 14 (1st stream), 11°56'00”S, 71°18'00"W, 250 m, 19­23.ix.1989, Adams et al. — 1 male ( NMNH) ; trail 1, marker 4 (near tents), 11°56'00”S, 71°18'00"W, 250 m, 8­22.ix.1989, Adams et al. — 1 female, 3 males ( NMNH) ; — 1 male ( MHNJP) ; — 1 male ( UMSP) ; trail 2, marker 18, 11°56'00”S, 71°18'00"W, 250 m, 12­23.ix.1989, Adams et al. — 1 male ( MHNJP) ; — 5 males ( NMNH) ; Quebrada Paujil­Picoflor , trail 1, marker 13, 11°56'39”S, 71°16'59"W, 350 m, 2.vii.1993, Blahnik & Pescador — 1 female ( NMNH) ; 4­6.vii.1993, Blahnik & Pescador — 1 female ( MHNJP) ; — 1 female ( NMNH) ; Quebrada Trompetero , trail 2, marker 15, 11°56'39”S, 71°16'59"W, 350 m, 3.vii.1993, Blahnik & Pescador — 1 male ( MHNJP) ; — 1 female, 2 males ( NMNH) ; — 2 females ( UMSP) .

Distribution. Bolivia, Peru.

Etymology. Bicarinatus, from the Latin bi­, “two” and carinatus, “keeled,” referring to the double keel of tergum X.

Figures

FIGURE 25. Phylloicus bicarinatus. Male (BIOLAT/TRIC000000057): A—lateral view; B— dorsal view; C—caudal view; D—phallus, lateral view; E—phallus, ventral view; G—sternum VIII, ventral view.

FIGURE 26. Phylloicus bidigitatus. Female (UMSP000067598): 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.