Anacroneuria marca Stark, 1998

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 : 29-30

Anacroneuria marca Stark, 1998

Figs. 16–17

Description. Body length: 12–14 mm. Head ( Fig. 16 ): brown forward of ocelli, with exception of pale m-line and pale anterior frontclypeus; often with clear spots on the outer side of the ocelli. Pronotum: oval, narrower than mesonotum; brown with pale, indistinct longitudinal areas forming a median stripe. Surface covered with fine short setae, lacking bristles. Margins completely fringed with thick bristles, somewhat variable in length. Meso- and Metanotum: pale irregular spots around midline; wing pads brown. 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. 17 ): dorsal surfaces covered with fine, short setae, except for hairless median bar. Posterior margin with very dense fringe of long setae. Femur dorsally without welldefined transverse row of thick bristles; short and medium-sized spines on dorsal surface, forming an arch that extends to 2/3 length of femur; basal posterior patch of very small spines along margin.

Distribution. Costa Rica.

Local distribution ( Fig. 18 ): Lowland and middle elevation streams on both Pacific and Caribbean slopes. Inhabits streams across a wide range of altitudes, reaching up to 2700 masl. Together with A. holzenthali , this species has one of the most widespread local distributions of all Costa Rican species.

Reared specimens. San José: Río Savegre, San Gerardo de Dota, 2700 m, 25.v.2008, Gutiérrez, 1 Ƥ; Quebrada sin nombre, Cerro de la Muerte, Santa María de Dota, 2200 m, 6.iv.2008, Gutiérrez, 1 3; Quebrada sin nombre, Santa María de Dota, 2700 m, 6.iv.2008, Gutiérrez, 1 3; Quebrada Cascada Bromelia, Cerro de la Muerte, Paraíso de los Quetzales, 2700 m, 22.xii.2008, Gutiérrez, 3 3; Alajuela : Río Niño, Upala, 9.xi.2008, Gutiérrez, 1 3, 1 Ƥ; Quebrada Rugama, Nuevo Arenal, Tilarán, 550 m, 20.ix.2008, Gutiérrez, 1 3; Río La Vieja, PH Chocosuela above dam, San Carlos, 730 m, 9.iii.2001, Gutiérrez, 8 3, 3 Ƥ; Río San Lorencito, Res. Biol. Alberto Manuel Brenes, San Ramón, 860 m, x.2008, Gutiérrez, 4 Ƥ; Heredia: Río Sarapiquí, Res. Biol. La Tirimbina, 180 m, 11.vii.2008, Gutiérrez, 3 3; Limón: Río Dos Novillos, Guápiles, several months 2006, Gutiérrez, 24 3, 25 Ƥ; Puntarenas: Río Barranca, Esparza, 450 m, 17.i.2007, Gutiérrez, 3 3, 2 Ƥ.

Additional material examined. San José: Quebrada Cascajal, primary forest, Coronado, 1750 m, 28.ix.2003, S. Amador, 3 3, 4 Ƥ; Bajo la Hondura, 1200 m, 30.iii.1990, W. Flowers, 3 Ƥ; Alajuela : Río San Lorencito, San Ramón, Res. Biol. Alberto Manuel Brenes, 850 m, 18.x.2003, F. Ruiz, 1 3; same, 15.x.2005, M.J. Quesada, 1 Ƥ; same, 10.x.1998, UCR students, 1 Ƥ; same, 24.ix.2005, M. Alfaro, 3 Ƥ; same, 30.xii.2000, PennState Univ students, 1 3; same, 11.iii.1990, W. Flowers, 2 3, 1 Ƥ; Río Chachagua, San Carlos, 200 m, 19.ix.2003, R. Lara, 1 3; Río Peñas Blancas, San Carlos, 260 m, 8.xii.1998, Springer & P. Paaby, 4 3, 10 Ƥ; Río La Vieja, PH Chocosuela, San Carlos, 730 m, 4.xii.2001, Springer, 4 3, 4 Ƥ; same, 15.vi.2002, R. Acosta, 1 3, 2 Ƥ; same, 9.xi.2002, Springer, 2 3, 7 Ƥ; same, downstream, 325 m, 4.viii.2001, Springer, 1 Ƥ; Cartago: Río Grande de Orosí, Paraíso, 1200 m, 28.viii.2005, A.M. Glavas, 1 Ƥ; Río Tausito, antes Trapiche, Pejibaye, Jiménez, 18.ix.2005, C. Lizano, 1 Ƥ; Río Purisil, Paraíso, 1200 m, 28.viii.2005, A.M. Glavas, 1 3; Heredia: Río Poza Azul, Sarapiquí, 275 m, iii.1998, P. Paaby, 1 3; Río Sarapiquí, Sarapiquí, 275 m, iii.1998, P. Paaby, 3 3, 6 Ƥ; same, 200 m, iii.1998, P. Paaby, 2 3; Limón: Río Dos Novillos, Los Manantiales, 500 m, 20.viii.2005, M. Montero-Guzman, 3 3, 2 Ƥ; Río Costa Rica, Est. INBio, Sarapiquí, 5.xi.2002, A. Y. Jimenéz, 1 3, 2 Ƥ; Río Bris, 500 m, arriba de la boca, 27.iii.2000, ANAI, 1 3, 1 Ƥ; Río Estrella, Boca cuen, 200 m, 29.iv.2000, ANAI, 6 3, 5 Ƥ; Río Yorkin, arriba desembocadura Río Brai, 500 m, 27.iii.2000, V Salgado, 2 3; Río Tsui, 200 m, 15.iv.2000, ANAI, 1 3; Río Yorkin, Puerto Yorkin, 100 m, 16.iv.2000, ANAI, 1 3, 2 Ƥ; Puntarenas: Río Convento, secondary forest, coffee plantation, Buenos Aires, 950 m, 23.vii.1998, A. Nunn, 1 3; same, 23.v.1998, A. Nunn, 2 3, 5 Ƥ; Río Sonador, Longo Mai, secondary forest, coffee plantation, Buenos Aires, 1050 m, 24.ix.1998, A. Nunn, 3 3; Quebr. Naranjal, below waterfall, Golfito, 10 m, iv–v.2009, J. Hansen, 5 3, 5 Ƥ; Quebr. Naranjal, Golfito, 10 m, 21.i.2000, Springer & UCR students, 2 3, 1 Ƥ; Quebr. Cañaza, Golfito, 10 m, v.1999, T. Hermanson & J. Steffen, 1 3; Río San Luis, zona abierta, San Luis Monteverde, 1200 m, 23.vi.1995, Springer & OTS students, 1 Ƥ; Quebr. La Alondra, San Luis Monteverde, 1200 m, 23.vi.1995, Springer & OTS students, 3 3.

Habitat and substratum. Submerged leaf litter packs and roots of riverine plants in strong current, in medium sized rivers and streams with forest cover.

Diagnosis. Anacroneuria marca can be distinguished from all other associated species by the oval pronotum that is narrower than the mesonotum ( Fig. 16 ); also it is the largest species described within this study and lacks the well defined line of transverse, thick bristles dorsally on the foreleg ( Fig. 17 ).

Figures

FIGURE 18. Map of Costa Rica showing distribution of Anacroneuria marca.

FIGURES 16 − 17. Anacroneuria marca, 16. Head and thorax (pro, meso and meta notum); 17. Foreleg.