Anacroneuria lineata ( Navás, 1924 ), Navas, 1924

Gutiérrez-Fonseca, Pablo E. & Springer, Monika, 2011, Description of the final instar nymphs of seven species from Anacroneuria Klapálek (Plecoptera: Perlidae) in Costa Rica, and first record for an additional genus in Central America, Zootaxa 2965, pp. 16-38 : 26-29

Anacroneuria lineata ( Navás, 1924)

Figs. 13–14

Neoperla lineata Navás, 1924

Description. Body length: 6–10 mm. Head ( Fig. 13 ): brown forward of ocelli with well defined m- line and pale anterior frontoclypeus. Pronotum: rectangular, widest anteriorly; brown laterally with pale rugosities extending to near lateral margin, indistinct medial pale stripe present. Margins completely fringed with short thick bristles, somewhat variable in length. Meso- and Metanotum: pale midline; wing pads dark or pale when well developed, but often with teardrop-shaped pale areas. Dorsal surfaces covered with fine short setae, and scattered thick bristles; well-defined anterior and lateral lines of thick bristles. Margins completely fringed with thick bristles, somewhat variable in length. Foreleg ( Fig. 14 ): dorsal surfaces covered with fine short setae, except for hairless median bar and basal posterior triangle-shaped area on femur. Femur dorsally with well-defined transverse row of ≥10 long, thick spines; scattered short and medium-sized spines on dorsal surface; basal posterior patch of very small spines along margin, reaching transverse row of long spines.

Distribution. Belize, Costa Rica, Guatemala, Honduras, México.

Local distribution ( Fig. 15 ): Lowland and middle elevation streams on both Pacific and Caribbean slopes, and highlands up to 1800 m asl.

Reared specimens. Alajuela : Río Niño, Upala, 300 m, 9.xi.2008, Gutiérrez, 3 3; Trib. Río Pizote, 280 m, 24.viii.2008, Gutiérrez, 1 3; Quebr. Catarata, Los Chiles Crucitas, 80 m, 2.iii.2007, Gutiérrez, 1 3; Río San Lorencito, San Ramón, Res. Biol. Alberto Manuel Brenes, 860 m, 22.ii.2008, Gutiérrez, 1 3; Limón: Guápiles, Río Dos Novillos, 441 m, several months 2006, Gutiérrez, 18 3, 21 Ƥ; Puntarenas: Esparza, Quebrada Beneficio, 600 m, 17.i.2007, Gutiérrez, 1 Ƥ; Río Barranca, Esparza, 450 m, 17.i.2007, Gutiérrez, 2 3, 3 Ƥ.

Additional material examined. San José: Finca El Rodeo, 4.xi.2000, D. Vásquez, 1 3, 1 Ƥ; Alajuela : Río Peñas Blancas, San Carlos, 260 m, 8.xii.1998, Springer & P. Paaby, 1 3; Río San Lorencito, San Ramón, Res. Biol. Alberto Manuel Brenes, 860 m, 15.x.2005, J. Ortiz, 1 Ƥ; same, 10.x.1998, UCR students, 1 3; same, 1.iv.1998, UCR students, 1 3; same, 2.iii.2002, R. Acosta, 1 Ƥ; Cartago: Tres Ríos, Quebrada La Chirraca, Cerros La Carpintera, Istarú, 1550 m, 6.ix.1999, S. Johannes, 2 3, 1 Ƥ; Heredia: San Isidro, 1800 m, 10.xi.1998, M. Bermúdez, 2 Ƥ; Est. Biol. La Selva, Pto. Viejo, Sarapiquí, 50 m, vi.1998, Springer & OTS students, 1 3; Río Chorreras, Los Cartagos, 1800 m, 3.xii.2000, L. López, 1 Ƥ; Quebrada El Tigre, Rara Avis, Est. Biol. “El Plástico", 560 m, i.1999, Springer & OTS students, 2 3, 3 Ƥ; Río Yerba Buena, P.N. Braulio Carrillo, 1350 m, iv.1995, C. Flores, 1 3; Limón: Río Santa Clara, Guápiles, 550 m, 5.ix.1998, L. Fernández, 1 3, 1Ƥ; Río Santa Clara, Guápiles, 550 m, 28.xi.1998, L. Fernández, 1 3, 1Ƥ; Guanacaste: Quebrada La Cascada, P.N. Barra Honda, 180 m, 8.i.2005, F. Ruiz, 1 Ƥ; Río La Caña, P. N. Barra Honda, 225 m, 15.i.2005, F. Ruiz, 4 3, 4 Ƥ; Quebrada Carbón, 100 m, 23.iv.2000, ANAI, 2 3, 2 Ƥ; Puntarenas: Río Jaba, below dam, San Vito, 1070 m, iv.1997, N. Powell, 1 3; Río Jaba, abajo matadero, San Vito, 1070 m, iv.1997, N. Powell, 1 3; Río Jaba, Finca Gamboa, San Vito, iii.1997, N. Powell, 1 Ƥ; Quebr. Naranjal, below waterfall, Golfito, v– iv.1999, J. Hansen, 30 3, 21 Ƥ; same, 21.i.2000, Springer & UCR students, 5 3, 11 Ƥ; Río Cañaza, Golfito, 10 m, v.1999, T. Hermanson & J. Steffen, 1 3; Río La Gamba, upstream, Golfito, 75 m, v.1999, J. Hansen, 2 3, 1 Ƥ; Quebrada Finca Loma Bonita, San Vito Coto Brus, 6.viii.1999, Springer, 1 Ƥ; Quebrada Junco, Pérez Zeledón, 590 m, 7.x.2005, F. Ruiz, 1 Ƥ; Río Lagarto, Chomes, 4.xi.2000, A. Loría, 1 Ƥ; Río Caracol, Interamericana, 50 m, 19.vii.1996, G. Umaña, 2 Ƥ; Río Esquinas, pared de la catarata, Finca la Esperanza, 100 m, 9.vi.1995, L. Vik, 1 3.

Habitat and substratum. Submerged leaf litter packs in strong current; medium sized streams and small rivers, mainly in forested areas; but this species was also found in one medium sized, slow flowing low elevation stream.

Diagnosis. Anacroneuria lineata is very similar to A. holzenthali and A. benedettoi in the amount and arrangements of spines on the foreleg, but differs clearly from these two species in the color pattern on the head and thorax ( Fig. 13 ). Anacroneuria varilla is somewhat similar in this color pattern, but with fewer spines on the foreleg ( Fig. 14 ), similar to A. divisa .

Figures

FIGURE 15. Map of Costa Rica showing distribution of Anacroneuria lineata.

FIGURES 13 − 14. Anacroneuria lineata, 13. Head and thorax (pro, meso and meta notum); 14. Foreleg.