Phylloicus angustior Ulmer, 1905

PRATHER, AYSHA L., 2003, Revision of the Neotropical caddisfly genus Phylloicus (Trichoptera: Calamoceratidae), Zootaxa 275 (1), pp. 1-214 : 27-29

Phylloicus angustior Ulmer

Figs. 19 , 20

Phylloicus angustior Ulmer, 1905a:78 [Type locality: Brazil, Rio Gr. do Sul [sic]; NMW; male]. — Flint 1966:11 [lectotype male]. — Botosaneanu & Alkins­Koo 1993:38 [distribution].

I was unable to locate a specimen with Flint’s lectotype label; it is not possible to determine if the specimens from Vienna I examined are those examined by Flint; the label data are the same. Phylloicus angustior is distinguished by the acute apex of tergum X (in lateral view; Fig. 19A ) and the unpatterned forewings.

Adult. Forewing length 12.1­14.4 mm, n = 105.

Head dark brown, with dorsomesal crest of chestnut brown setae. Maxillary palps chestnut brown. Antenna twice forewing length; dark brown, with narrow patches of pale sensilla on anteromesal surface of each flagellomere. Dorsal pterothorax dark brown; ventrolateral thorax golden. Femora golden; tibiae dark brown; foretarsi dark brown; mesotarsi pale tan; metatarsi dark brown. Metathoracic leg of male with posterior fringe of long setae, setae dark. Tibial spur formula 2,4,4. Forewing flat; dark brown; with golden bands and dark patches; with single basal stripe, golden; darker setae surrounding thyridial spot, extending to posterior margin; two short dark bands in anterodistal portion of wing; with small golden spot marking thyridium. Hind wing basal brush absent.

Male. Preterminalic abdominal terga with anteromesal notch. Corematic structures absent, terga III­V unmodified, without membranous lobes or sclerotized processes. Sternum VII without anteromesal process. Sternum VIII enclosing base of elongate sternum IX; posteromesal process notched, notch deep and round or narrow and parallel­sided ( Fig. 19A, C ). Tergum IX deeply notched anteriorly, margins of notch ridged; posterior margin with acute mesal projection ( Fig. 19B ); lateral ridge absent; dorsal pleural setae approximately 10, ventral pleural setae absent ( Fig. 19A ). Preanal appendage longer than tergum X, but less than 11/2 times length, widest apically, setae filamentous, longer than appendage ( Fig. 19A, B ). Tergum X without basal lobes; basodorsal process short and digitate; basolateral processes of varying length and often asymmetrical; apex, in lateral view, acute, in dorsal view, notched, notch round; with row of short setae on lateral surfaces and apicodorsally ( Fig. 19A, B ). Harpago rounded; peglike setae many, apical ( Fig. 19A, C ). Phallotremal sclerites average size, longest dimension less than diameter of phallobase; dorsal sclerite ovoid, in dorsal view horseshoe­shaped ( Fig. 19D, E ).

Female. Preterminal abdominal terga with anteromesal notch. Sternum VII without anteromesal process. Tergum VIII without posterolateral brush; sternum VIII with shallow posteromesal notch; sternum VIII ( Fig. 20C ). Tergum IX with very short mesal ridge ( Fig. 20B ). Sternum IX anterior and posterior lobes darkly sclerotized and striate, punctate, with patch of lightly sclerotized cuticle lateral to vaginal opening ( Fig. 20A ). Tergum X appendage length equal to mesal lobe, base indistinct, apex triangular; mesal lobe lightly sclerotized; digitate lateral processes length approximately equal diameter and often asymmetrical ( Fig. 20B ). Sternum X with patches of short fine setae posterolaterally to anal opening ( Fig. 20A ). Vaginal apparatus anterior and posterior sclerites equal in length; anterior sclerite rounded anteriorly, posterolateral projections absent; posterior sclerite triangular; posterior end of spermatheca a sclerotized expanded tube ( Fig. 20A ).

Material examined. ARGENTINA: Misiones: 10.xi.1909, Jørgensen — 1 male ( MCZ) ; 20.xii.1909, Jørgensen — 1 female ( MCZ) ; 6 km E El Dorado , 22.xi.1973, Flint — 1 female ( NMNH) ; Ao. Coati , 15 km E San Jose, 18­19.xi.1973, Flint — 2 males ( NMNH) ; Ao. Piray Mini W, Dos Hermanas, 23.xi.1973, Flint — 2 males ( NMNH) ; Ao. Saura, 9 km N, L.N. Alem, 20.xi.1973, Flint — 3 males ( NMNH) ; San Pedro, Arroyo Piray­Guazú, 22.xi.1973, Flint — 2 males ( NMNH) ; BRAZIL: Goiás: Goiás , 7.vii.1984, Becker — 1 male ( UMSP) ; Minas Gerais: Aldeia de Cachoeira das Pedras , 20°06'49”S, 44°01'25"W, 925 m, 28­29.ix.2000, Paprocki & Braga — 3 males, 3 females ( MZUSP) ; — 1 male, 1 female ( NMNH) ; — 16 males, 10 females ( UMSP) ; 9.x. Paprocki & Isaac — 5 males, 7 females ( UMSP) ; Cachoeira do Abacaxi, Vale do Tropeiro , 20°12'16”S, 43°38'10"W, 1120 m, 30.ix.2000 — 1 male ( UMSP) ; Ibitipoca, Sitio of Anestis Papadopolous , 21°43'14”S, 43°54'33"W, 1200 m, 23.x.2000, Paprocki — 1 female ( UMSP) ; Rio das Velhas, upstream from São Bartolomeu , 20°18'39”S, 43°33'57"W, 18.ix.1998, Paprocki & Amarante — 8 males ( UMSP) ; Rio Mainarte, bridge on Cibrão road, 20°27'15”S, 43°24'06"W, 700 m, 19.ix.1998, Paprocki & Amarante — 3 females ( UMSP) ; trib. of Rio Parauninha, Serra do Breu, Faz. do Zé da Mata , 19°07'55”S, 43°37'24"W, 15.ii.1999, Paprocki & Braga — 3 males, 4 females ( UMSP) ; Estação Ecológica de Tripuí, Córrego Botafogo , 20°22'54”S, 43°33'37"W, 1100 m, 16.xii.1998, Paprocki & Amarante — 1 female ( UMSP) ; 23.i.1999, Amarante — 1 male ( UMSP) ; Estação Ecológica do Tripuí, Córrego Tripuí , 20°23'22”S, 43°32'32"W, 1070 m, 21.ii.1999 — 1 female ( UMSP) ; Serra do Cipó, Capão da Mata , 19°19'21”S, 43°32'15"W, 1170 m, 10.iii.1996, Holzenthal, Rochetti, & Oliveira — 2 females ( UMSP) ; km 126, 15.xii.1973, Froehlich — 2 males ( NMNH) ; Parana: Rio Cascata, Graciosa, road to Morretes , 25°20'13”S, 48°53'58"W, 750 m, 10.i.1998, Holzenthal, Melo, & Almeida — 1 male ( UMSP) ; Rio Grande do Sul: Staudinger & Bang­Haas — 1 male ( DEI) ; Stieglmayr — 1 male, lectotype male ( NMW) ; Pelotas , 20.iv.1958, Biezanko — 1 male ( BMNH) ; Santa Catarina: Seara ( Nova Teutônia ), 27°11'00”S, 52°23'00"W, 300­500 m, 11.x.1936, Plaumann — 1 male ( BMNH) ; 7.ix.1937, Plaumann — 1 male ( BMNH) ; 1.x.1964, Plaumann — 1 male ( NMNH) ; Urubici, Morro da Igreja, Cachoeira Veu da Noiva , 28°04'36”S, 49°31'05"W, 1300 m, 5.iii.1998, Holzenthal, Froehlich, & Paprocki — 1 male ( UMSP) ; PARAGUAY: Itapua: Pirapo , 28­31.xii.1971, Peña G. — 5 males ( NMNH) ; Paraguari: Parque Nacional Ybycui, Arroyo Mina , 5.x.1984, Bonace — 1 male ( NMNH) ; URUGUAY: Cerro Largo: Arroyo Quebrache , 1.iii.1959, Carbonell — 3 males ( NMNH) .

Distribution. Argentina, Brazil, Paraguay, Uruguay.

Figures

FIGURE 19. Phylloicus angustior. Male (holotype): A—lateral view; B—dorsal view; C— sterna VIII, IX, and inferior appendages, ventral view; D—phallus, lateral view; E—phallotremal sclerites, dorsal view.

FIGURE 20. Phylloicus angustior. Female (UMSP000067554): A—sterna IX, X and vaginal apparatus, ventral view; B—terga IX and X, dorsal view; C—sternum VIII, ventral view.