Oscar Díaz-Díaz

Description of two new species of Malacoceros and Rhynchospio spionids (Polychaeta: Spionidae) from the Grand Caribbean region

Se describen dos nuevas especies de espionidos del mar Caribe, Malacoceros cariacoensis n. sp. de Venezuela y Rhynchospio harrisae n. sp. de Guana, Islas Virgenes, Islas Virgenes Britanicas. Malacoceros cariacoensis n. sp. puede diferenciarse por la forma del prostomio, el cual posee dos cuernos frontales cortos, un par de organos nucales se extienden hasta la base del setigero 2, setigero 1 reducido, pigmentacion del cuerpo ausente, y en el numero de dientes apicales de los ganchos cubiertos. Rhynchospio harrisae n. sp. difiere de las otras especies del genero en que el peristomio esta moderadamente desarrollado con pequenas alas laterales, las setas anteriores notopodiales estan arregladas en dos hileras y en la region superior con un mechon de setas capilares. Se proporciona una clave de especies de Malacoceros.

Redescription of two species and five new species of Dispio Hartman, 1951 (Spionidae: Polychaeta) from the eastern Pacific Coast and Caribbean Sea, with a review of the genus

Available type material of Dispio uncinata Hartman, 1951 and D. mororoi Gibbs, 1971, as well as newly collected material from Venezuela and material deposited in the Los Angeles County Museum of Natural History, was examined. Several important differences were found between D. uncinata, D. mororoi, the new material deposited in the museum and the newly collected material from Venezuela, Panama and California. Dispio uncinata and D. mororoi are redescribed and five new species are also identified and described: D. anauncinata sp. nov., D. lenislamellata sp. nov., and D. longibranchiata sp. nov. are from Southern California, D. panamensis sp. nov. from Panama, and D. bescanzae sp. nov. from Venezuela. Morphological differences between species were recorded, particularly in reference to the shape of prostomium, and caruncle, size of peristomium, shape of notopodial and neuropodial postchaetal lamellae, branchiae from anterior chaetigers fused completely or partially to the notopodial lamellae, presence or abscent of accessory branchial pairs, structure of notopodial and neuropodial chaetae, notopodial and neuropodial lamellae overlapping or touching and other consistent characters. Results of the review of the material from Southern California indicates that D. uncinata is not found in this area of the Pacific, and we recommend that the wide distribution of this species should be taken with caution especially for those distant records from the type locality. A key to all species of Dispio is provided.

Poliquetos bentónicos Amphinomida, Phyllodocida y Eunicida (Annelida: Polychaeta) de la región de fiordos y canales australes de Chile recolectados durante los cruceros CIMAR 13 al 20 fiordos

Benthic polychaetes belonging to Amphinomida, Phyllodocida and Eunicida orders collected in the austral Chilean channel and fjord region, in the Magellanic biogeographic province (42oS-56oS), from the Reloncaví estuary (41°25’S) to Obstruction estuary (52°11’S), between 26 and 1173 meters water depth, were identified and characterized. Polychaetes were collected during the research cruises CIMAR 13, 14, 15, 17, 18 and 20 Fjords, between the years 2007 and 2014 (CIMAR; Marine Research Cruises in Remote Areas). One hundred 52 N. ROZBACZYLO et al. and 17 oceanographic stations were analyzed, distributed in each cruise ordered geographycally from north to south as follows: CIMAR 17, 24 sampling stations, from Estero Reloncaví (41°40’S, 72°24’O) to Boca del Guafo (43°49’S, 74°23’O); CIMAR 13, 25 sampling stations, from Boca del Guafo (43°46,40’S) to Estero Elefantes (46°29,00’S); CIMAR 18, 16 sampling stations, from Boca del Guafo (43°46,40’S) to Estero Elefantes (46°29,00’S, 73°49,00’O); CIMAR 20, 26 sampling stations, from Golfo de Penas to Canal Trinidad; CIMAR 14, 15 sampling stations, between Golfo de Penas and Canal Trinidad (47°S a 50°10’O) and CIMAR 15, 11 sampling stations, from Seno Europa (50°07,00’S, 74°14,20’O) to Estero Obstrucción (52°11,00’S, 72°32,20’O). The samples analyzed in this study ware obtained on board the RV AGOR 60 “Vidal Gormaz”, during the CIMAR cruises 13, 14 and 15 Fjords, B/I “Abate Molina” CIMAR cruises 17 and 18 Fjords and AGS 61 “Cabo de Hornos” during the CIMAR cruise 20. In the total area thirtynine species in 15 families were identified. The best represented families were Polynoidae (9 species), Nereididae (5 species) and Lumbrineridae (5 species). Of the species collected, seven constitute new records for the study area and three are new records for Chile.

Guía y claves para el reconocimiento de las subfamilias, géneros y especies de Syllidae registradas a lo largo de la costa de Chile, archipiélago Juan Fernández e isla de Pascua (Annelida: Phyllodocida: Syllidae)

An updated review of polychaete species of the family Syllidae registered so far in the southeastern Pacific Ocean along the coast of Chile, from the locality of Arica (18o28’ S) in the northern border to Cape Horn (55o56’ S) at the southern end, in Juan Fernández Archipelago (33°40’ S, 79°00’ W) and Easter Island (27°09’ S, 109°23’ W) is presented. Keys to the determination of the subfamilies, genera and species of syllids registered in Chile are provided. A chronological list of the authors who have reviewed specimens for each 8 G. SAN MARTÍN et al. of the species considered valid is included. All collecting localities of each species in chronological and latitudinal order, with the author’s name and the date of the publication in which the locations were identified are included. Information on morphology, biology, ecology and systematics of syllids in general is provided. The number of syllids registered so far along the Chilean coast is 63 species, of these 56 species have been recorded to the continental coastal littoral of Chile, five species in Juan Fernández Archipelago and eight species in Easter Island, in 25 genera, distributed in five subfamilies, in the three areas considered within the limits of the Chilean sea. Of the 63 species of syllids recorded so far along the coast of Chile, including the austral channels and fjords, the Juan Fernández Archipelago and Easter Island, 32 record the coast of Chile as type locality, two the Juan Fernández Archipelago, and of them 22 species are considered endemic to Chile.