Phylloicus plaumanni Flint

PRATHER, AYSHA L., 2003, Revision of the Neotropical caddisfly genus Phylloicus (Trichoptera: Calamoceratidae), Zootaxa 275 (1), pp. 1-214 : 88-90

Phylloicus plaumanni Flint

Figs. 92 , 93

Phylloicus plaumanni Flint, 1983:76 [Type locality: Brazil, Edo. Santa Catarina, Seara (27°09'S, 52°15'W); NMNH; male].

Phylloicus plaumanni is similar to P. bidigitatus and obliquus . The forewings of P. plaumanni are a uniform dark brown.

Adult. Forewing length 8.6­10.9 mm, n = 30.

Head dark brown or black. Maxillary palps dark brown. Antenna twice forewing length; chestnut brown, with narrow patches of pale sensilla on anteromesal surface of each flagellomere. Dorsal pterothorax dark brown; ventrolateral thorax dark brown. Femora dark brown; tibiae dark brown; foretarsi dark brown; mesotarsi golden brown; metatarsi dark brown. Metathoracic leg of male without posterior fringe. Tibial spur formula 2,4,4. Forewing flat; dark brown; without colored markings. 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 similar to anterior sterna, sternum IX not elongate. Tergum IX with paired mesal ridges extending 1/2 length of segment; posterior margin not distinct from base of tergum X; thinly sclerotized anteromesally ( Fig. 92B ); lateral ridge present; dorsal pleural setae approximately 10, ventral pleural setae absent ( Fig. 92A ); sternum IX with paired mesolateral ridges; sternum IX ( Fig. 92C ). Preanal appendage approximately length of tergum X, narrowly elliptic, setae long, but not filamentous or longer than appendage ( Fig. 92A, B ). Tergum X without basal lobes; basodorsal process absent; basolateral processes absent; apex, in lateral view, acute, in dorsal view, notched, notch deep and round; setose dorsally ( Fig. 92A, B ). Harpago sharply tapered; peglike setae few, apical ( Fig. 92A, C ). Phallic endotheca with paired apicolateral lobes and paired basolateral lobes, basolateral lobes multilobed, apicolateral lobes small and rounded; phallotremal sclerites average size, longest dimension less than diameter of phallobase; dorsal sclerite narrow, width less than height ( Fig. 92D, 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. 93C ). Tergum IX without mesal ridge; covered with short fine pilosity ( Fig. 93B ). Sternum IX anterior lobes smooth and indistinct, posterior lobes striate, with shallow pockets lateral to vaginal opening ( Fig. 93A ). Tergum X appendage longer than mesal lobe, base marked by faint suture line, apex triangular; mesal lobe lightly sclerotized; digitate lateral processes absent ( Fig. 93B ). Sternum X without setae in membrane ( Fig. 93A ). Vaginal apparatus posterior sclerite elongate; anterior sclerite tapered anteriorly, posterolateral projections rounded; posterior sclerite triangular; posterior end of spermatheca a sclerotized ovoid ( Fig. 93A ).

Material examined. ARGENTINA: Misiones: San Ignacio, Haute Parana, ii., Wagner — 1 male paratype (NMNH); Apr, Wagner — 1 male paratype ( NMNH) ; BRAZIL: Santa Catarina: Seara ( Nova Teutônia ), 27°11'00”S, 52°23'00"W, 300­500 m, 31.v.1938, Plaumann — 1 male ( BMNH) ; 10.ix.1939, Plaumann — 1 male paratype ( MCZ) ; 25.iv.1963, Plaumann — holotype male, 3 male, 1 female paratypes ( NMNH) ; 1.v.1963, Plaumann — 5 male, 1 female paratypes ( UMSP) ; 1.xi.1963, Plaumann — 4 male, 4 female paratypes ( NMNH) ; 6.x.1964, Plaumann — 3 male, 1 female paratypes ( NMNH) ; — 1 male paratype ( UMSP) .

Distribution. Argentina, Brazil.

Figures

FIGURE 92. Phylloicus plaumanni. Male (holotype): A—lateral view; B—dorsal view; C—sternum IX and inferior appendages, ventral view; D—phallus, lateral view; E—phallus, ventral view.

FIGURE 93. Phylloicus plaumanni. Female (UMSP000068270): A—sterna IX, X and vaginal apparatus, ventral view; B—terga IX and X, dorsal view; C—sternum VIII, ventral view.