Studies of Parydrinae (Diptera: Ephydridae), II: A Revision of the Shore Fly Genus Pelinoides Cresson

Abstract

The genus Pelinoides Cresson is revised for the first time and is divided into three species groups, with the following species: the pallipes group (P. andinus, cyclocerus, new species and P. pallipes, new species); the cyclocerus group (P. cyclocerus, new species); and the sulcatus group (P. sulcatus Cresson; P. pullus, new species; P. amblys, new species; P. chiloensis, new species; P. nigrihalteratus, new species; P. phaeopleurus, new species; P. australis, new species; P. chilensis, new species; P. colerus, new species; P. flavipalpus, new species; P. flinti, new species; P. phaeonotus, new species; P. fuscus, new species; P. obscurus, new species; P. opacus, new species; P. penai, new species; P. unctus Cresson; and P. pruinosus, new species). Of the three species groups, the pallipes group is structurally the most divergent, and from the standpoint of distribution the pallipes group is also the exception. Pelinoides generally has a temperate distribution, with species occurring at southern latitudes (Argentina and Chile) or at high elevation at latitudes closer to the Equator. The pallipes group, however, occurs in tropical lowlands on either side of the Andes. To provide perspective to this revision, an annotated key to the neotropical genera of Parydrinae, followed by a brief discussion, is provided. In that key and discussion the tribe Philygriini is tranferred from the subfamily Notiphilinae to Parydrinae. Keys to species groups and species, illustrations, and distribution maps are provided.