Species of Cirratulus (Polychaeta: Cirratulidae) from the Argentinean coast

SARACHO BOTTERO MARÍA ANDREA; RODOLFO ELIAS; WAGNER MAGALHÃES

Wales

Conferencia; 12th International Polychaete Conference; 2016

National Museum Wales, Cardiff

The taxonomy of the family Cirratulidae is not an easy task and a revision of the cirratulids from the Southern regions is ongoing.Among the multitentaculates, Cirratulus jucundus (Kinberg, 1866), Cirratulus patagonicus (Kinberg, 1866) and Cirriformia nasutaEhlers, 1897 were described from Argentina and are all currently considered as valid. An examination of both deposited material and specimens collected from recent surveys have revealed two species of the multitentaculate genus Cirratulus. Coastal localities of the southern region of Argentina (Patagonia) showed the presence of C. jucundus. This species was previously mentioned in some expeditions to Antarctica and surrounding waters, including some coastal localities of Argentina. On the other hand, a new species to science is described for subtidal areas off Peninsula Valdes (42° S). This species has the characteristics of the genus, such as a prostomium with one row of black eyespots and peristomium with three rings and unique features such as the tentacular filaments and first pair of branchiae placed between the peristomium and first chaetiger near notopodial base; subsequent branchial filaments have a small dorsal displacement from notopodial base.