The genus Exogone (Polychaeta: Syllidae) from the Brazilian coast, with the description of a new species

Abstract

A new species of Exogone, E. gigas sp. n., is described herein, together with E. africana, E. arenosa, E. dispar, E. naidinoides, E. rolani, and E. simplex, collected along the Brazilian coast, including new morphological details. The distribution of E. breviantennata is expanded to include the states of Espírito Santo, Paraíba and Pernambuco. Exogone gigas sp. n. is characterized by having a large median antenna, the absence of dorsal cirri on chaetiger 2, and having a triangular process and minute spines on the shaft of the spiniger-like chaetae on chaetiger 2. The Brazilian specimens are compared to the morphologically most similar congeners. A key for the species described in this paper is provided.

Some intertidal and shallow water polychaetes of the Caribbean coast of Costa Rica

“…Paresque, Fukada and Nogueira (2014) also collected it from the intertidal to 52 m depth in Paraíba, Rio de Janeiro, Brazil. Lattig & Martin, 2011 Material examined: Puerto Vargas, rock wash, 1 m, col. R. Heard, Oct. 9, 2001 (1).…”

A new species of Exogone Ørsted, 1845 (Annelida: Syllidae: Exogoninae) from Brazilian waters

“…They can also be found in bathyal and abyssal depths, although in less densities. Exogone Ørsted, 1845 counts on around 40 described species (San Martín & Aguado, 2014), eleven of which were confirmed, by formal publications, as occurring in Brazilian waters (Menezes-Moura et al, 2018): E. africana Hartmann-Schröder, 1974, E. anomalochaeta Benham, 1921, E. arenosa Perkins, 1981, E. breviantennata Hartmann-Schröder, 1959, E. cebimar Fukuda & Nogueira, 2014 (Webster, 1879), E. gigas Paresque, Fukuda & Nogueira, 2014, E. naidina Ørsted, 1845 Westheide, 1974, E. rolani San Martín, 1991and E. simplex Hartmann-Schröder, 1960 although four other species have already been cited for the Brazilian coast in "grey literature": E. aquadulcensis Pascual, Núñez & San Martín, 1996, E. lourei Berkeley & Berkeley, 1938, E. marisae Pascual, Núñez & San Martín, 1996 (Claparède, 1868) (for further details, see Paresque et al, 2014).…”

A new species of Paraonis and an annotated checklist of polychaetes from mangroves of the Brazilian Amazon Coast (Annelida, Paraonidae)

“…The features that confirm these specimens as Exogone (Exogone) breviantennata Hartmann-Schröder, 1959 are median and lateral antennae of similar size, compound spinigers and falcigers with bidentate blades (subdistal tooth larger than distal tooth) and falcigers in the anterior body with 3–4 relatively thick spines. This species is found worldwide in several habitats such as in seagrass in the intertidal zone, rocky shores, algae asSEMblages, soft bottoms (San Martín and Bone 2001, Paresque et al 2014), and others. The type material of E. (E.) breviantennata is from a mangrove (Hartmann-Schröder 1959) as in the present study.…”