Phylloicus elegans Hogue and Denning

PRATHER, AYSHA L., 2003, Revision of the Neotropical caddisfly genus Phylloicus (Trichoptera: Calamoceratidae), Zootaxa 275 (1), pp. 1-214 : 46-48

Phylloicus elegans Hogue and Denning

Figs. 43 , 44 , 109

Phylloicus elegans Hogue and Denning, 1983 in Denning et al. 1983:184 [Type locality: Panama, Canal Zone, Barro Colorado Island; WSU; male]. — Flint 1991:98 [male, distribution].

The wing pattern of P. elegans ( Fig. 109 ) is identical to that of P. lituratus . However, the male abdomen of P. elegans is very distinctive: tergum IV has distinctively shaped posteriorly projecting lateral sclerites and multilobed lateral coremata ( Fig. 43F ). The females of the two species are indistinguishable, and as several series from different localities contain males of both P. elegans and P. lituratus , all determinations of females are tentative. Hybrids may occur; this is discussed under P. lituratus .

Adult. Forewing length 10.4­12.1 mm, n = 106.

Head chestnut brown. Maxillary palps dark brown. Antenna twice forewing length; chestnut brown, with narrow patches of pale sensilla on anteromesal surface of each flagellomere. Dorsal pterothorax chestnut brown; ventrolateral thorax golden. Femora golden; foretibiae dark brown; mesotibiae dark brown; metatibiae dark brown; foretarsi dark brown; mesotarsi white proximally, dark distally; 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 two transverse bands; proximal band ivory, reaching posterior wing margin, at least 1/2 width of wing, an inverted V­shape; distal band ivory, beginning at anterior wing margin, at least 1/2 width of wing; with two basal stripes, ivory ( Fig. 109 ). Hind wing basal brush present in male and female; male brush light brown; female brush dark brown.

Male. Preterminalic abdominal terga with anteromesal notch. Corematic structures present. Tergum IV with paired posterior processes and paired lateral sclerites, lateral coremata; posterior process truncate; lateral sclerite spatulate, directed laterally; lateral coremata with basal globose lobes. Tergum V without sclerotized modifications ( Fig. 43F ). Sternum VII with short, acute anteromesal process. Sternum VIII enclosing base of elongate sternum IX; posteromesal process notched, notch deep and round ( Fig. 43A, C ). Tergum IX with mesal ridge extending full length of segment; posterior margin with round narrow mesal projection ( Fig. 43B ); lateral ridge present; dorsal pleural setae approximately 4, ventral pleural setae approximately 2 ( Fig. 43A ). Preanal appendage at least 11/2 times length of tergum X, widest apically, setae filamentous, longer than appendage ( Fig. 43A, B ). Tergum X without basal lobes; basodorsal process short and digitate; basolateral processes short, length less than or equal to diameter; apex, in lateral view, truncate, in dorsal view, entire or notched, notch shallow; with paired dorsolateral ridges ( Fig. 43A, B ). Harpago rounded; peglike setae many, apical ( Fig. 43A, C ). Phallotremal sclerites average size, longest dimension less than diameter of phallobase; dorsal sclerite ovoid, in dorsal view horseshoe­shaped ( Fig. 43D, E ).

Female. Preterminal abdominal terga with anteromesal notch. 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. 44C ). Tergum IX without mesal ridge ( Fig. 44B ). Sternum IX anterior and posterior lobes darkly sclerotized and striate, with patch of lightly sclerotized cuticle lateral to vaginal opening ( Fig. 44A ). Tergum X appendage shorter than mesal lobe, base indistinct, apex oblique; mesal lobe lightly sclerotized; digitate lateral processes absent ( Fig. 44B ). Sternum X with patches of short fine setae posterolaterally to anal opening ( Fig. 44A ). Vaginal apparatus anterior and posterior sclerites equal in length; anterior sclerite truncate anteriorly, posterolateral projections absent; posterior sclerite triangular; posterior end of spermatheca a sclerotized cone ( Fig. 44A ).

Material examined. COLOMBIA: Antioquia: Quebrada Honda, 12 km SW Fredonia, 1450 m, 22.ii.1983, Flint — 3 males, 1 female ( NMNH) ; Quebrada La Jimenez , Mun. Sopetran, trap C , 780 m, 22.v.1983, Matthias — 1 male ( NMNH) ; COSTA RICA: Alajuela: 20 km S Upala , 15.vii.1990, Parker — 2 males ( EMUS) ; 6.i.1991, Parker — 1 male ( EMUS) ; 30.v.1991, Parker — 1 male ( EMUS) ; 1­15.vii.1991, Parker — 1 male ( EMUS) ; 1­10.viii.1991, Parker — 1 male ( EMUS) ; 21­31.viii.1991, Parker — 1 male, 1 female ( EMUS) ; unnamed river, Cerro Campana ca. 6 km (air) NW Dos Rios, 10°54'00”N, 85°24'00"W , 640 m, 22­23.vii.1987, Holzenthal, Morse, & Clausen — 1 male ( UMSP) ; Guanacaste: Maritza, Quebrada Marilin , 10°57'04”N, 85°29'24"W , 600 m, 12.i.1992, Sweeney, MacLeod, & Villalobos — 3 males ( NMNH) ; 9.xi.1992, de la Rosa — 1 male ( UMSP) ; Río Los Ahogados, Río Los Ahogados , 11.3 km ENE Quebrada Grande, 10°51'54”N, 85°25'23"W , 470 m, 7.iii.1986, Holzenthal & Fasth — 1 male ( UMSP) ; Parque Nacional Guanacaste, Río Orosí, Estación Pitilla , 10°59'28”N, 85°25'41"W , 700 m, 22­25.v.1990, Holzenthal & Blahnik — 1 male ( UMSP) ; Límon: Río Uatsi , ca. 8 km (air) W Bribri, 09°37'12”N, 82°54'00"W , 60 m, 25.v.1987, Holzenthal, Hamilton, & Heyn — 1 male ( UMSP) ; Puntarenas: Río Singrí , ca 2 km (air) S Finca Helechales, 09°03'25”N, 83°04'55"W , 720 m, 21.ii.1986, Holzenthal, Morse, & Fasth — 1 male ( UMSP) ; San José: Escazu , 11­18.iv.1988, Parker — 2 males ( EMUS) ; 15.iv.1988, Parker — 2 males ( EMUS) ; 15­21.v.1988, Parker — 1 male, 1 female ( EMUS) ; Reserva Biológica Carara, Río Carara, Carara , 09°46'41”N, 84°31'52"W , 200 m, 14.iii.1991, Holzenthal, Muñoz, & Huisman — 1 male ( UMSP) ; Río del Sur , 1.5 km (rd) S Carara, 09°46'08”N, 84°31'52"W , 160 m, 13.iii.1991, Holzenthal, Muñoz, & Huisman — 1 male ( UMSP) ; ECUADOR: Pichincha: Río Palenque Biological Station, Río Palenque , Santo Domingo (47 km) , 229 m, 29.vii.1976, Cohen — 1 male ( NMNH) ; NICARAGUA: Chontales: Rt. 7, km 206 E of Villa Somosa , 29.vii.1967, Flint & Ortiz — 1 male ( NMNH) ; Jinotega: Cerro Mazú , 14°33'00”N, 85°07'00"W , 220 m, 7­10.ix.1997, Maes & Hernández — 2 males, 1 female ( UMSP) ; Zelaya: Cerro Saslaya , 13°44'00”N, 85°01'00"W , 700 m, 1.iv.1996, Maes & Hernández — 1 male, 1 female ( NMNH) ; PANAMA: Darien: Río Tacarcuna , 579 m, 11.vii.1963, Fairchild — 1 male ( MCZ) ; Panama: Canal Zone, Barro Colorado Island , 28­ 30.iv.1964, S & W Duckworth — 1 male ( NMNH) ; 10­17.v.1964, S & W Duckworth — 1 male ( NMNH) ; 21.ii.1967, Akre — 12 male, 21 female paratypes ( CAS) ; 22­24.ii.1967, Akre — holotype male ( WSU) ; 12.iii.1967, Akre — allotype female ( WSU) ; 18.iii.1967, Akre — 10 male, 14 female paratypes ( CAS) ; 24­25.ii.1969, Akre — 8 male, 9 female paratypes ( CAS) ; 12.iii.1969, Akre — 1 male, 2 female paratypes ( CAS) ; 8.v.1977, Silberglied & Aiello — 1 male ( NMNH) ; 25.vi.1978, Silberglied & Aiello — 1 male ( NMNH) ; Snyder­Molino trail, marker 3 , 28.ix.1988 ­ 3.i.1989, Wolda 7 males ( NMNH) ; 13.xii.1989 ­ 13.ii.1990, Wolda — 6 males ( UMSP) ; 12.xii.1990 ­ 5.ii.1991, Wolda — 5 males ( NMNH) ; Windowpane trap­4A , 31.i.­5.ii.1986, Wolda — 1 male ( NMNH) .

Distribution. Colombia, Costa Rica, Ecuador, Nicaragua, Panama.

Figures

FIGURE 43. Phylloicus elegans. 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; F—tergum IV, dorsal view.

FIGURE 44. Phylloicus elegans. Female (UMSP000066071): A—sterna IX, X and vaginal apparatus, ventral view; B—terga IX and X, dorsal view; C—sternum VIII, ventral view.

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.