Oecetis protrusa, Blahnik, Roger J. & Holzenthal, Ralph W., 2014

Blahnik, Roger J. & Holzenthal, Ralph W., 2014, Review and redescription of species in the Oecetis avara group, with the description of 15 new species (Trichoptera, Leptoceridae), ZooKeys 376, pp. 1-83 : 49-54

Oecetis protrusa sp. n. Figs 22, 55, Map 1

Diagnosis.

Oecetis protrusa sp. n. is most reliably diagnosed by its size, yellowish color, large, conspicuous forewing spots (often with those at the base of the discal and thyridial cells larger than those in Fig. 55), and particularly by the shape of its phallobase, which has its apex protruding and its ventral margin somewhat convexly bulged preapically, often with the extreme apex slightly recurrent. This is a subtle character, but evident once it is recognized. Additionally, the inferior appendages have the ventral lobe prominent and acutely angled with respect to the dorsal lobe. Oecetis protrusa is perhaps most likely to be confused with Oecetis verrucula sp. n., or Oecetis mexicana sp. n., which are similar in size and frequently co-occur with Oecetis protrusa . Like Oecetis verrucula , the ventral lobes of the inferior appendages are acutely angled, but unlike Oecetis verrucula , these are very distinctly, angularly diverging basally, as viewed ventrally (compare Figs 22E and 26E). Oecetis verrucula additionally differs by having a differently shaped, shorter phallobase with a small ventral “wart,” and is also slightly darker in color, with smaller, usually somewhat oval, forewing spots. Oecetis mexicana is very similar in color, particularly in having large, rounded forewing spots, but differs in that the ventral lobe of the inferior appendages is either obtusely angled or nearly at a right angle and is less divergently bent at its base, as well as in having a phallobase that is merely arched ventrally, without a convex bulge. In sorted, sympatric series, it is evident (on comparison) that Oecetis mexicana is very slightly darker in color and larger in size than Oecetis protrusa , but the differences are admittedly subtle. In a large series from Guácimo, Limón, Costa Rica (Escuela de Agricultura de la Región Tropical Húmeda), where Oecetis protrusa and Oecetis mexicana occurred sympatrically and were about equally abundant, the length of the phallobase in Oecetis protrusa was somewhat shorter than usual and the convex ventral bulge less distinctively developed. Cleared specimens, however, were easily sorted and the inferior appendages were typical of the 2 species. On account of the slightly shorter phallic length of these specimens, and preapical bulge on the phallobase, they could possibly be confused with Oecetis tumida sp. n. However, the inferior appendage of that species is quite different in form, with the ventral lobe much shorter and less angularly projecting.

Adult.

Forewing length: male (7.0-8.0 mm), female (6.0-6.5 mm). Color pale yellowish (paler than Oecetis mexicana ). Antennae pale yellow with indistinct, narrow annulations at intersection of antennomeres. Forewing spots very large and distinct; spots at base of discal and thyridial cells largest, that of discal cell nearly round, spot at base of fork V nearly as large; veins of forewing chord widely and usually nearly evenly spaced, with crossveins nearly perpendicular, or s and r-m veins slightly closer; chord with distinct spots at juncture of major veins, those at opposite ends of chord larger; apical spots, at apices of major veins prominent, pigmentation extending beyond veins. Setae along veins in apical part of forewing elongate, semi-prostrate, laterally diverging. Fringe of setae along costal margin of forewing moderately dense, suberect.

Male genitalia.

Segment IX very short, with elongate setae along posterolateral margin. Tergum X with narrow, deflexed mesal lobe, lobe relatively elongate, uniform in width or somewhat lobulate apically, apex with small sensilla; lobe continuous basoventrally with short, paired lateral membranous projections. Preanal appendage moderately elongate, length about 3 times maximum width, simple in structure, apical setae elongate. Inferior appendage with prominent dorsal lobe, usually somewhat narrowed and rounded apically, and angularly projecting ventral lobe; ventral lobe distinctly projecting, forming acute angle with dorsal lobe; mesal margin of ventral lobe, as viewed ventrally (Fig. 22E), with distinctly angular bend near base; basomesal projection moderately developed, forming small rounded projection with short, stiff setae; dorsal lobe with stout, mesally-curved setae on dorsal margin and stout, ventrally-curved setae on mesal surface. Phallobase, as viewed laterally, moderately elongate, ventral margin distinctly protruding, with noticeable preapical convex bulge, apex usually slightly ridged or burred; as viewed caudally, with apex narrowly U-shaped, not keeled ventrally. Phallotremal sclerite prominent, basally forming short tubular collar, ventral margin projecting, apex acute; asymmetrical lateral sclerite probably always present, but only slightly protruding and not very evident, located on right side.

Holotype.

Male (pinned), COSTA RICA: Heredia: Parque Nacional Braulio Carrillo, Est. Magsasay, Río Peje, 10°24.120'N, 84°3.000'W, el 130 m, 25-26.viii.1990, Holzenthal, Blahnik, Huisman (UMSP) (UMSP000207778).

Paratypes.

MEXICO: Chiapas: 7.8 mi E Pichucalco, 27-28.vii.1966, Flint & Ortiz, 4 males, 3 females (pinned) (NMNH); same location, 7.xii.1975, C.M. & O.S. Flint, Jr., 6 males (pinned) (NMNH); Río Lacanja, 22 km N Ocosingo, 19.v.1981, C.M. & O.S. Flint, Jr., 2 males (pinned) (NMNH); Cascada Misolja, 20 km S Palenque, 17-18.v.1981, C.M. & O.S. Flint, Jr., 5 males, 2 females (pinned), 8 males, 34 females (alcohol) (NMNH); Río Tulija, 48 km S Palenque, 17.v.1981, C.M. & O.S. Flint, Jr., 2 males (pinned), 5 males, 2 females (alcohol) (NMNH); Tabasco: Río Puyacatengo, E Teapa, 28-29.vii.1966, Flint & Ortiz, 15 males, 6 females (alcohol) (NMNH); Veracruz: Los Tuxtlas area, "Los Tuxtlas" Biological Station, 31 km NE Catemaco, Río Palma, above LaPalma, 7-14.v.1981, C.M. & O.S. Flint, Jr., 3 males, 3 females (pinned) (NMNH); Los Tuxtlas area, "Los Tuxtlas" Biological Station, 31 km NE Catemaco, Río Palma, below LaPalma, 5.v.1981, C.M. & O.S. Flint, Jr., 4 males (pinned), 4 males, 12 females (alcohol) (NMNH); Río Tacolapan, Rt. 180, km 551, 25-26.vii.1966, Flint & Ortiz, 2 males (alcohol) (NMNH); GUATEMALA: Alta Verapaz, Río Cahabon, Chibite, 3.i.1989, B. C. Kondratieff, 7 males (alcohol) (NMNH); NICARAGUA: Puente Quinama, E Villa Somoza, 29.vii.1967, O. S. Flint, Jr., 1 male (pinned) (NMNH); COSTA RICA: Las Canas, Río Cordobicí, 26.vii.1967, O. S. Flint, Jr., 2 males (pinned), 1 male, 1 female (alcohol) (NMNH); Las Canas, 13.vii.1965, P. J. Spangler, 7 males (alcohol) (NMNH); 10 mi NW Liberia, 25.vii.1965, P. J. Spangler, 32 males, 12 females (pinned), 1 male, 2 females (alcohol) (NMNH); Pacuare, Río General, 1.vii.1967, Flint & Ortiz, 8 males, 2 females (pinned) (NMNH); 9 mi NW Esparta, 22.vii.1965, P. J. Spangler, 2 males, 1 female (alcohol) (NMNH); Alajuela: Río Pizote, ca 5 km (air) S Brasilia, 10°58.320'N, 85°20.700'W, el 390 m, 12.iii.1986, Holzenthal & Fasth, 2 males (pinned), 20 males, 15 females (alcohol) (UMSP); Río Pizote, ca 5 km N Dos Ríos, 10°56.880'N, 85°17.460'W, el 470 m, 9.iii.1986, Holzenthal & Fasth, 2 males, 1 female (pinned), 64 males, 116 females (alcohol) (UMSP); Reserva Forestal San Ramon, Río San Lorencito and tribs., 10°12.960'N, 84°36.420'W, el 980 m, 30.iii.-i.iv.1987, Holzenthal, Hamilton, Heyn, 1 male (alcohol) (UMSP); Laguna Río Cuarto & trib., 2.8 km (road) N Río Cuarto, 10°21.420'N, 84°12.900'W, el 400 m, 13.ii.1992, Holzenthal, Muñoz, Kjer, 1 male, 3 females (pinned) (UMSP); Cartago: Reserva Tapantí, Quebrada Seg unda @ admin. Building, 9°45.660'N, 83°47.220'W, el 1250 m, 9-10.v.1990, Holzenthal & Blahnik, 2 males (alcohol) (UMSP); Guanacaste: Colorado, 31.iii.1988, W. E. Steiner, J. M. Hill J. M. Swearingen, & J. M. Mitchell, 2 males, 2 females (NMNH); Río Tizate, 7.2 km NE Canas Dulces, 10°46.380'N, 85°26.940'W, el 275 m, 28.vi.1986, Holzenthal, Heyn, Armitage, 2 males (pinned), 50 males, 75 females (alcohol) (UMSP); Río Mena, 4.2 km W Santa Cecelia, 11°3.540'N, 85°26.880'W, el 260 m, 11.iii.1986, Holzenthal & Fasth, 1 male (pinned), 9 males, 11 females (alcohol) (UMSP); Quebrada Garcia, ENE Quebrada Grande, 10°51.720'N, 85°25.680'W, el 470 m, 8.iii.1986, Holzenthal & Fasth, 7 males (pinned), 7 males, 8 females (alcohol) (UMSP); Río Los Ahogados, 11.3 km ENE Quebrada Grande, 10°51.900'N, 85°25.380'W, el 470 m, 7.iii.1986, Holzenthal & Fasth, 1 male (pinned), 7 males, 3 females (alcohol) (UMSP); Parque Nacional Guanacaste, Maritza, Río Tempisquito Sur, 10°57.000'N, 85°28.800'W, el 600 m, 30.viii.1990, Huisman & Quesada, 6 males, 10 females (alcohol) (UMSP); Río Tempisquito, ca 3 km S route 1, 10°47.400'N, 85°33.120'W, el 75 m, 6.iii.1986, Holzenthal & Fasth, 9 males, 2 females (alcohol) (UMSP); Río Aguacate, 0.5 km E Aguacate, 10°33.900'N, 84°56.340'W, el 590 m, 16.ii.1992, Holzenthal, Muñoz, Kjer, 1 male (pinned) (UMSP); Heredia: same data as holotype, 10 males, 36 females (pinned), 5 males, 7 females (alcohol) (UMSP); Río Bijagual, on road to Magsasay, 10°24.480'N, 84°4.560'W, el 140 m, 12.ii.1986, Holzenthal, Morse, Fasth, 2 males, 1 female (alcohol) (UMSP); Río Bijagual, 3.5 km S Chilamate, 10°26.160'N, 84°3.600'W, el 40 m, 1.vii.1992, F. Muñoz, 9 males (pinned) (UMSP); Río Sarapiquí, 300 m S Chilamate, 10°27.060'N, 84°3.840'W, el 40 m, 30.vi.1992, F. Muñoz, 11 males, 1 female (pinned) (UMSP); Est. Biol. La Selva, Río Puerto Viejo, 10°26.400'N, 84°0.720'W, el 30 m, 10-11.ii.1986, Holzenthal, 3 males, 1 female (pinned) (UMSP); same location, 19.vi.1986, Holzenthal, Heyn, Armitage, 4 males, 6 females (alcohol) (UMSP); Est. Biol. La Selva, Quebrada El Salto, 10°25.620'N, 84°0.300'W, el 50m, 10.ii.1986, Holzenthal, 2 males (pinned) (UMSP); Est. Biol. La Selva, Quebrada Sura, 10°26.220'N, 84°0.600'W, el 50 m, 20-21.vi.1986, Holzenthal, Heyn, Armitage, 5 males (alcohol) (UMSP); Río Sarapiquí, 7 km W Puerto Viejo, 10°27.120'N, 84°4.020'W, el 50 m, 11.ii.1986, Morse & Fasth, 16 males, 2 females (pinned), 29 males, 14 females (alcohol) (UMSP); Quebrada Ceibo, 6 km E Cháves, 10°22.920'N, 83°55.320'W, el 50 m, 2.vii.1992, F. Muñoz, 1 male (pinned) (UMSP); Limón: Reserva Biol. Hitoy-Cerere, Río Cerere, 9°40.260'N, 83°1.680'W, el 90 m, 23-24.iii.1987, Holzenthal, Hamilton, Heyn, 1 male, 1 female (pinned) (UMSP); E.A.R.T.H., Río Parismina, 10°14.880'N, 83°34.200'W, el 5 m, 4.ii.1992, Holzenthal, Muñoz, Kjer, 55 males, 5 females (pinned), 12 males, 3 females (alcohol) (UMSP) (INBIO); E.A.R.T.H., Río Destierra, Pozo Azul, 10°12.480'N, 83°34.440'W, el 15 m, 5.ii.1992, Holzenthal, Muñoz, Kjer, 23 males, 13 females (pinned), 6 males, 11 females (alcohol) (UMSP); same location, 27.vi.1992, F. Muñoz, 5 males, 1 female (pinned) (INBIO); E.A.R.T.H., Río Dos Novillos, 10°13.200'N, 83°35.460'W, el 20 m, 3.ii.1992, Holzenthal, Muñoz, Kjer, 19 males, 10 females (pinned) (UMSP); Res. Biol. Barbilla, Río Dantas, 15 km (road) S Pacuarito, 9°59.640'N, 83°26.580'W, el 300 m, 27-30.i.1992, Holzenthal, Muñoz, Kjer, 2 males (pinned) (UMSP); Puntarenas: Río Jaba at rock quarry, 1.4 km (air) W Las Cruces, 8°47.400'N, 82°58.200'W, el 1150 m, 15.iii.1991, Holzenthal, Muñoz, Huisman, 3 males, 4 females (pinned) (UMSP); Río Jaba, 2.4 km (air) NW San Vito, 8°49.920'N, 82°59.460'W, el 970 m, 13.vi.1986, Holzenthal, Heyn, Armitage, 1 male, 7 females (alcohol) (UMSP); Río Negro, ca 10 km (air) SSW Las Alturas, 8°57.000'N, 82°51.060'W, el 1035 m, 17.ii.1986, Holzenthal, Morse, Fasth, 5 males, 1 females (pinned) (UMSP); Río Guineal, ca. 1 km (air) E Finca Helechales, 9°4.560'N, 83°5.520'W, el 840 m, 4.viii.1987, Holzenthal, Morse, Clausen, 2 males (alcohol) (UMSP); Río Singri, ca. 2 km (air) S Finca Helechales, 9°3.420'N, 83°4.920'W, el 720 m, 21.ii.1986, Holzenthal, Morse, Fasth, 2 males (alcohol) (UMSP); Río Rincón, 6.5 km (air) S Rincón, 8°38.280'N, 83°28.800'W, el 20 m, 7.iv.1987, Holzenthal, Hamilton, Heyn, 1 male (alcohol) (UMSP); Río Cotón in Las Alturas, 8°56.280'N, 82°49.560'W, el 1360 m, 12.viii.1990, Holzenthal, Blahnik, Muñoz, 2 males, 3 females (pinned) (UMSP); Río Bellavista, ca 1.5 km NW Las Alturas, 8°57.060'N, 82°50.760'W, el 1400 m, 10-11.viii.1990, Holzenthal, Blahnik, Muñoz, 1 male, 1 female (pinned) (UMSP); Río Ceibo, route 2, ca 6 km W rd to Buenos Aires, 9°8.940'N, 83°22.620'W, el 250 m, 20.ii.1986, Holzenthal, Morse, Fasth, 1 male (pinned), 114 males, 116 females (alcohol) (UMSP); Res Biol. Carara, Río Carara, 4.3 km (rd) E Costanera Sur, 9°48.600'N, 84°34.320'W, el 20 m, 12.iii.1991, Holzenthal, Muñoz, Huisman, 1 male, 1 female (alcohol) (UMSP); Río Cataracta, 5.5 km S Brujo (Carara Zona Sur), 9°3.840'N, 83°16.320'W, el 120 m, 6-7.vii.1992, F. Muñoz, 4 males, 1 female (pinned) (UMSP); Río Platanar, Salitre, 6.5 km NE Buenos Aires, 9°11.700'N, 83°16.860'W, el 450 m, 8-9.vii.1992, F. Muñoz, 17 males, 13 females (pinned) (UMSP); San José: P. N. Braulio Carrillo, Est. Carrillo, Quebrada El Molinete, 10°9.600'N, 83°57.780'W, el 700 m, 22-28. viii.1986, I. & A. Chacón, 21 males, 7 females (pinned) (UMSP); Res. Biol., Carara, Río Carara in Carara, 9°46.680'N, 84°31.860'W, el 200 m, 14.iii.1991, Holzenthal, Muñoz, Huisman, 3 males (alcohol) (UMSP); Res. Biol. Carara, Río del Sur, 1.5 km (rd) S Carara, 9°46.140'N, 84°31.860'W, el 160 m, 13.iii.1991, Holzenthal, Muñoz, Huisman, 3 males (pinned), 1 male (alcohol) (UMSP); Río Negro, 3.5 km SE jct. route 239, 9°40.800'N, 84°23.640'W, el 230 m, 21.iii.1986, Holzenthal & Fasth, 14 males, 10 females (alcohol) (UMSP); Río General, 1 mi S San Isidro, 1.vii.1967, P.J. Spangler, 1 male (alcohol) (NMNH); PANAMA: El Valle, 15.vii.1967, O.S. Flint, Jr., 1 male (pinned) (NMNH); Canal Zone: Pipeline Rd., Río Agua Salud, 8-12.vii.1967, Flint & Ortiz, 4 males (pinned) (NMNH); Gamboa, Río Agua Salud, --vii.1967, W.W. Wirth, 1 male (alcohol) (NMNH); Río Agua Salud, 30.iii.1965, S. & W.D. Duckworth, 1 male, 3 females (alcohol) (NMNH); San Blas: Río Carti Grande, 2 km W Nusagandi, 5.iii.1985, Flint & Louton, 1 male (pinned) (NMNH); COLOMBIA: Magdalena: Municipio de Santa Marta, Río Minca en Minca, 11°8.584'N, 74°6.967'W, el 570 m, 9.xii.1997, F. Muñoz-Q, et al., 3 males, 1 female (pinned) (UMSP); Tolima: Armero, nr Guayabal, 2-10.ii.1977, E.L. Peyton, 7 males, 3 females (pinned), 42 males, 18 females (alcohol) (NMNH); Valle: Municipio de Buenaventura, Río Escalerte, frente a casa de “AcuaValle”, ca. 15 km SE Cordoba, 3 °49.633'N, 76°52.250'W, el 200 m, 1.xii.1997, F. Muñoz-Q. et al., 1 male, 1 female (pinned) (UMSP); ECUADOR: Loja: Macara, 13.viii.1977, L.E. Peña G., 1 male (pinned) (NMNH); Río Puyango, el 300 m, 17-18.viii.1977, L.E. Peña G., 1 male (pinned), 1 male (alcohol) (NMNH); Pichincha: Santo Domingo de los Colorados, 14 km E, 5.vii.1975, Langley & Cohen, 1 male, 1 female (pinned) (NMNH).

Etymology.

This species is named Oecetis protrusa for the protruding ventral apex of the phallobase in this species.