New species and records of Ulmeritoides (Ephemeroptera: Leptophlebiidae) from Costa Rica

Abstract

Ulmeritoides acosa new species (type locality: La Palma, Costa Rica) and Ulmeritoides chavarriae new species (type locality: Santa Elena, Parque Nacional Santa Rosa, Costa Rica) (Ephemeroptera: Leptophlebiidae) are described from imagos and nymphs. Both species occur along the west coast of Costa Rica, and both are adapted to living in temporary streams. Additional localities are given for Ulmeritoides guanacaste Domínguez and Ulmeritoides tifferae Domínguez, and a key is given for adults and nymphs of the four Costa Rican species of Ulmeritoides.

Comparison of macroinvertebrate communities of intermittent and perennial streams in the dry forest of Guanacaste, Costa Rica

“…Costa Rica is one of a limited number of research focal locations for such streams globally (Pringle and Hamazaki, 1997;Ramirez and Pringle, 1998;Boyero and Bosch, 2004;Boyero et al, 2009). Literature for the dry tropics is less extensive and largely limited to fish and invertebrate assemblages in intermittent streams of Brazil (Nolte et al, 1997;Medeiros and Maltchik, 2001;Maltchik and Medeiros, 2006) and Costa Rica (Chapman and Kramer, 1991a,b;Jackson and Sweeney, 1995;Pritchard, 1996;Avila and Flowers, 2005). In a dry forest region of western Costa Rica, culverts were provided for passage of a series of parallel headwater streams under Canal Oeste, a major irrigation canal from Lake Arenal in the highlands to rice fields of the Guanacaste lowlands, but leakage from both unlined sections of the canal and cracked portions of concrete lined sections was sufficient to change intermittent into perennial streams below the canal.…”

PRIMER REGISTRO DE <i>Ulmeritoides</i> TRAVER (EPHEMEROPTERA: LEPTOPHLEBIIDAE) PARA EL CHOCÓ, COLOMBIA

“…Carvajal (2005) para el Ecuador reporta la presencia del género Ulmeritoides en pequeños remansos o empozamientos con abundante materia orgánica (hojarasca) depositada en el lecho, en la que parece refugiarse y alimentarse, además se ha encontrado junto con algunas plantas acuáticas emergentes y flotantes como Nymphaea sp. Avila y Flowers (2005) en Costa Rica, reportan la presencia regular de Ulmeritoides en paquetes de hojas en áreas de corrientes permanentes y temporales. De acuerdo con Domínguez et al (2006), las poblaciones de este género son relativamente pequeñas y parecen estar asociadas principalmente a corrientes de tierras bajas tropicales y subtropicales, donde se las encuentra en paquetes de hojas y debajo de troncos en áreas de corriente lenta a rápida.…”