Twenty new species of Metrichia (Trichoptera: Hydroptilidae) from Costa Rica are described: M. acicula, M. alajuela, M. amplitudinis, M. ancora, M. angulosa, M. decora, M. gordita, M. luna, M. magna, M. mechuda, M. meta, M. picuda, M. prolata, M. pseudopatagonica, M. savegra, M. separata, M. sesquipedalis, M. spica, M. triquetra, and M. truncata. Records of six previously described species occurring in Costa Rica are provided: M. avon (Bueno-Soria), M. biungulata (Flint), M. lemniscata (Flint), M. penicillata (Flint), M. quadrata (Flint), and M. riva (Bueno-Soria). An illustrated key is provided for males of all species occurring in Costa Rica, Nicaragua and Panama. A new species group, the M. patagonica group, is proposed.
Bibliographical noteFunding Information:
We are indebted to Silvia Santiago-Fragoso, Universidad Nacional Autónoma de México; for suggestions on the manuscript and to Rafael Barba-Álvarez, UNAM, for preparation of the material. We are especially grateful to Martha Gabriela Espinosa-Farrera, UNAM, for the illustrations of the male genitalia. Oliver S. Flint Jr., National Museum of Natural History, Smithsonian Institution, kindly lent material for comparative purposes and description. The second author is especially thankful to personnel at the Instituto Nacional de Biodiversidad and the Servicio de Parques Nacionales, Costa Rica, for logistic and other support. Special thanks are extended to all those who helped with fieldwork, but especially F. Muñoz, R. Blahnik, and J. Huisman. We are grateful to Steven C. Harris, Clarion University, for his assessment of the new species and original sorting of the material. This material is based upon work supported by the National Science Foundation under grants 8512368, 8917684, 9400632, and 0117772. This support is gratefully acknowledged.
The present study marks the continuation of a series of papers describing the microcaddisfly fauna of Costa Rica and is based largely on material collected though funding provided to Holzenthal by the U. S. National Science Foundation. A total of 20 new species are described in the present paper and a key is provided to all species in the genus occurring in lower Central America (Nicaragua, Costa Rica, Panama).
- Costa Rica
- New species