Phylloicus nigripennis (Banks)

PRATHER, AYSHA L., 2003, Revision of the Neotropical caddisfly genus Phylloicus (Trichoptera: Calamoceratidae), Zootaxa 275 (1), pp. 1-214 : 77-79

Phylloicus nigripennis (Banks)

Figs. 76 , 77

Phylloicus nigripennis ( Banks, 1900:256) [Type locality: Mexico, Puebla, Santa Maria ; MCZ; female; in Heteroplectron ]. — Flint 1967:17 [illustration of male, as synonym of aeneus ]. latus ( Navás, 1924:83) [Type locality: Costa Rica; MNHNP; male; as Macronema latum ]. — Holzenthal 1988:53, 71 [as synonym of aeneus ]. NEW SYNONYM sagittosa ( Ross, 1951:72) [Type locality: Mexico, Lower California, Todos Santos; CAS; male; in Notiomyia ]. — Flint 1967:17 [as synonym of aeneus ]. NEW SYNONYM

Although Banks described Heteroplectron nigripennis from a female type, a male apparently from the same series, collected in Puebla, Mexico, exists. Both these specimens are in good condition, and have very dark, uniformly colored wings. Tergum VIII of the female type is bare of setal tufts. Although the male terminalia of P. aeneus and P. nigripennis are very similar, coremata are not present in P. nigripennis . As in P. aeneus , the apical third of the P. nigripennis forewing folds obliquely toward the midline (as in Fig. 2 ). The head and thorax of these specimens is orange and the abdomen is black. In males of P. nigripennis abdominal tergites II and III have a distinctive papillate surface, which is absent in the other species. Based on these differences, I am resurrecting nigripennis from synonymy with aeneus .

The holotypes of Macronema latum and Notiomyia sagittosa are males, the former from Costa Rica; the latter from Baja California. The wings of both are quite faded, but in size, body coloration, and abdominal morphology, they are consistent with the males of P. nigripennis . I have examined many additional specimens from Costa Rica and am confident that those populations are conspecific with P. nigripennis populations in central/eastern Mexico. However, the only specimens from Baja I have been able to examine are the type and paratypes of Notiomyia sagittosa , all of which are badly faded. Because color cannot be accurately assessed, and because of the seemingly disjunct distribution, I am less confident that these are conspecific with P. nigripennis . Nonetheless, in the specimens available to me, there are no characters other than distribution with which to discriminate a Baja species.

The male illustrated is a specimen from the MCZ, with collection labels identical to those on the female type of P. nigripennis .

Adult. Forewing length 8.2­ 10 mm, n = 66.

Head orange. Maxillary palps dark brown or black. Antenna twice forewing length; black, with narrow patches of pale sensilla on anteromesal surface of each flagellomere, with longer setae proximally. Prothorax orange; dorsal pterothorax orange; ventrolateral thorax dark brown, or black. Legs dark brown, or black. Metathoracic leg of male without posterior fringe. Tibial spur formula 2,4,3. Forewing apical third folded obliquely toward midline; dark brown, or black; without colored markings. Hind wing basal brush present in male.

Male. Preterminalic abdominal terga with anteromesal notch. Terga II and III with papillate sculpturing of surface. 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 without mesal ridge; posterior margin with irregular mesal projection; dorsal surface covered with fine pilosity ( Fig. 76B ); lateral ridge absent; dorsal pleural setae approximately 10, ventral pleural setae approximately 5 ( Fig. 76A ); sternum IX with paired mesolateral ridges; sternum IX ( Fig. 76C ). Preanal appendage shorter than tergum X, but greater than 2/3 length, narrowly elliptic, setae long, but not filamentous or longer than appendage ( Fig. 76A, B ). Tergum X sagittate basally; basodorsal process broad and setose; basolateral processes absent; apex, in lateral view, acute, in dorsal view, notched, notch triangular; with paired setose lateral processes ( Fig. 76A, B ). Harpago slightly tapered; peglike setae few, apical ( Fig. 76A, C ). Phallic endotheca with paired basolateral lobes, basolateral lobes digitate; phallotremal sclerites average size, longest dimension less than diameter of phallobase; dorsal sclerite ovoid, in dorsal view horseshoe­shaped ( Fig. 76D, 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. 77C ). Tergum IX with very short mesal ridge ( Fig. 77B ). Sternum IX anterior and posterior lobes darkly sclerotized and striate, with deep sublateral invaginations ( Fig. 77A ). Tergum X appendage longer than mesal lobe, base marked by faint suture line, apex triangular; mesal lobe lightly sclerotized; digitate lateral processes absent ( Fig. 77B ). Sternum X without setae in membrane ( Fig. 77A ). Vaginal apparatus anterior and posterior sclerites equal in length; anterior sclerite truncate anteriorly, posterolateral projections acute; posterior sclerite ovoid; posterior end of spermatheca a sclerotized sphere with posteroventral notch ( Fig. 77A ).

Material examined. COSTA RICA: 1920, Serre — P. latus holotype male ( MNHNP) ; Cartago: Paraiso , 1.xi.1965, Krauss — 2 males ( NMNH) ; Río Aquiares, Turrialba , 20.vi.1967, Flint & Ortiz — 2 males ( UMSP) ; Reserva Tapantí, Río Grande de Orosí , 09°41'10”N, 83°45'22"W, 1650 m, 23­25.vi.1967, Flint & Ortiz — 2 males ( NMNH) ; Límon: Río General, Pacuare , 1.vii.1967, Flint & Ortiz — 2 males ( NMNH) ; San José: Paso Ancho de San Sebastian , 25.x.1936, Ballou — 2 males ( NMNH) ; Pedregoso , 640 m, 21.ii., Rounds — 1 male ( MCZ) ; San José , Alfaro — 2 males ( MCZ) ; GUATEMALA: Jutiapa: San Jerónimo, 1879­1881, Champion — 4 males ( BMNH) ; HONDURAS: Minas de Oro , Comayagua, 2.vi., Edwards — 1 female ( MCZ) ; Tegucigalpa , 28.vii.1918, Dyer — 1 male ( MCZ) ; MEXICO: 3048 m, Sallé — 1 male ( CNC) ; — 1 male ( NRS) ; Deppe — 2 males, 1 female ( ZMHU) ; 1871, Bilimek — 4 males ( NMW) ; Baja California Sur: Todos Santos , 10.xi.1941, Ross & Bohart — P. sagittossa holotype male, 2 male paratypes ( CAS) ; Chiapas: Teopisca , 9.vii.1966, Flint & Ortiz — 2 males ( NMNH) ; Jalisco: Guadalajara , 22.vii.1903, Banks — 1 male ( MCZ) ; Michoacán: Presa Couitzio, Morelia , 30.v.1963, Pacheco — 1 male, 2 females ( UMSP) ; San Lorenzo, Rt. 15, km 206, 14­15.vii.1966, Flint & Ortiz — 2 males, 1 female ( NMNH) ; Mórelos: Balnearia Las Estacas , 28.iv.1963, Pacheco — 1 male, 1 female ( NMNH) ; Cuernavaca , 1871, Bilimek — 1 male ( NMW) ; nr. Xochitepec, Rt. 95, km 91, 1.viii.1965, Flint — 1 male ( CNC) ; — 1 male, 3 females ( NMNH) ; Puebla: 1911, Gineste — 1 female ( MNHNP) ; Santa Maria, Banks — 1 male, P. nigripennis holotype female ( MCZ) ; Sonora: Nogales, Arroyo Canaveral , 15.vii.1955, Malkin — 1 male ( CAS) ; Veracruz: Dos Rios, Rt. 140, km 347, 1.viii.1966, Flint & Ortiz — 2 males ( CNC) ; — 2 males ( NMNH); nr. El Encero, Rt. 140, km 347, 22.vii.1965, Flint & Ortiz — 5 males, 1 female ( NMNH) ; — 1 male, 1 female ( UMSP) ; NICARAGUA: Matagalpa: Selva Negra , 2.v.1993, Novelo & Maes — 1 male ( NMNH).

Distribution. Costa Rica, Guatemala, Honduras, Mexico, Nicaragua.

Figures

FIGURE 76. Phylloicus nigripennis. Male (A­C, UMSP000010239; D­E, UMSP000068233): A— lateral view; B—dorsal view; C—sternum IX and inferior appendages, ventral view; D—phallus, lateral view; E—phallus, ventral view; F—terga I­III, dorsal view.

FIGURE 77. Phylloicus nigripennis. Female (holotype): A—sterna IX, X and vaginal apparatus, ventral view; B—terga VIII­X, dorsal view; C—sternum VIII, ventral view.

FIGURES 1­3. —1, Phylloicus aeneus (UMSP000034901). Head, lateral. —2, Phylloicus mexicanus (UMSP000041378). Head, dorsal; — 3, Phylloicus mexicanus (UMSP000041378) Pro­ and mesothorax, dorsal.