Taxonomic characterization and a new record of Pherusa tumbensis Hartmann-Schroder, 1962 (Polychaeta, Flabelligeriidae) in northern Chile

The polychaete Pherusa tumbensis is recorded from a new locality, and new taxonomic data are presented for this species. Specimens were collected in the intertidal zone of Punta Gruesa, Iquique (20 degree 22'S) and compared with specimens from the type locality. The presence of P. tumbensis in northern Chile represents the first documented record following its original description, extending its' geographical range from 36 degree 40'S to 20 degree 22'S. Present observations showed P. tumbensis as bearing an anterior pair of grooved palps, and more than 50 pairs of irregularly distributed filiform branchiae; this was important data which had not been included in the original description of the species. A taxonomic key is presented to recognize the four species of Pherusa recorded from the coast of Chile.Original Abstract: Se entregan nuevos antecedentes taxonomicos y se senala una nueva localidad de hallazgo de Pherusa tumbensis a partir de ejemplares recolectados en el intermareal de Punta Gruesa, Iquique (20 degree 22'S). Los especimenes fueron comparados con ejemplares de la localidad tipo. La presencia de P. tumbensis en el norte de Chile representa el primer registro documentado, despues de su descripcion original, extendiendo su rango de distribucion geografica desde los 36 degree 40'S a los 20 degree 22'S. La informacion taxonomica obtenida, permite caracterizar a P. tumbensis como una especie provista con un par de palpos anteriores acanalados y mas de 50 pares de branquias filiformes distribuidas irregularmente, antecedentes que habian sido omitidos en la descripcion original. Se incluye una clave taxonomica para reconocer las cuatro especies de Pherusa registradas en la costa de Chile.