New species of Leptohyphidae (Insecta: Ephemeroptera) from Colombia with evidence of reproductive time segregation

Abstract

Five new species of Leptohyphidae are described, four of them from nymphal and adult stages: Leptohyphes albipennis, L. coconuco, L. nigripennis, and Tricorythodes trifasciatus. Tricorythopsis ticuna is described from male imagines only. Two of the new species, Leptohyphes albipennis and L. nigripennis, represent a distinct group in the genus characterized by the presence of hind wings in the female and T-shaped penes in the male. Both species, very closely related, differ markedly in swarm time activity. SEM photographs of the eggs of L. nigripennis are presented.

Resumen

Se describen cinco especies nuevas de Leptohyphidae, cuatro de ellas a partir de los estados ninfal y adulto: Leptohyphes albipennis, L. coconuco, L. nigripennis y Tricorythodes trifasciatus. Tricorythopsis ticuna, se describe sobre la base de imagos machos. Dos de las nuevas especies descriptas aquí en Leptohyphes (L. albipennis y L. nigripennis) representan un grupo distintivo dentro del género, caracterizado por la presencia de alas posteriores en las hembras y por poseer penes en forma de T en los machos. Ambas especies, muy cercanamente emparentadas, difieren notablemente en el periodo de actividad reproductiva. Se presentan microfotografías de barrido para los huevos de L. nigripennis.

Keywords:

• Leptohyphidae
• Leptohyphes
• Tricorythodes
• Tricorythopsis

Acknowledgments

We are grateful to J. G. Peters (FAMU), E. Domínguez (Universidad Nacional de Tucumán, Argentina) and M. Sartori (Lausanne, Switzerland) for their comments on the manuscript. The following Institutions allowed access to type material: IFML, FAMU, MEUV. Santiago Duque and Instituto de Ivestigaciones Amazónicas- IMANI (Universidad Nacional de Colombia, Sede de Leticia) arranged collecting activities in Leticia; J. Echeverri provided ecological information from RioFrío River. The “Corporacion Autónoma Regional del Cauca- CRC” permitted the inclusion of the hydrological information from Grande river, and the “Corporación Autónoma Regional del Valle del Cauca - CVC” for information on hydrology, precipitation and water quality of Riofrio River. Physico-chemical and bacteriological analyses of both rivers were made at “Laboratorio de Aguas de la Universidad del Valle” and “Laboratorio de Aguas de la CVC”. This study was partially supported by PIP CONICET 02563/99 and PICT ANCyP 01-12529. One of us (CM) belongs to the National Council of Scientific Research of Argentina (CONICET), whose support is greatly acknowledged.