Sabellaria and Lygdamis (Polychaeta: Sabellariidae) from reefs off northeastern Brazil including a new species of Sabellaria

Abstract

Members of the polychaete taxon Sabellariidae Johnston, 1865 are known to live in sand tubes cemented onto rocky substrata, mollusk shells, or sea grasses. Of 37 known Sabellaria species, only nine were reported for the Brazilian coast, in all cases being associated with aggregates of other species. The genus is considered cosmopolitan. Herein we describe for the first time an aggregate of sabellariids composed by Sabellaria nanella and Sabellaria wilsoni. In addition, we describe a new species of Sabellaria. Lygdamis are represented by solitary species. None of the 17 known species were previously reported from the southwestern Atlantic Ocean. We report Lygdamis rayrobertsi for the first time in the South Atlantic.

Sabellariidae from Lizard Island, Great Barrier Reef, including a new species of Lygdamis and notes on external morphology of the median organ

“…In these species, the median organ is welldeveloped, arising from the dorsal sagittal suture between opercular lobes and is cylindrical with a planar coronal shape. In at least L. wirtzi, this organ is provided with eyespots on both sides, but these have not been described in the other two species (Kirtley 1994;Nishi & Núñez 1999;Dos Santos et al 2014). The new species differs from L. ehlersi in the relative size of the median organ, which is thinner in the former species (Kirtley 1994).…”

“…sp., and L. wirtzi (Caullery 1913;Kirtley 1994;Nishi & Núñez 1999;Dos Santos et al 2014) have median organs with a planar distal end with a teardropshape corona (e.g., Fig. 4A-E).…”

“…Most of them live in intertidal or shallow depths, but there are some genera, and species, restricted to the continental shelf or the deep sea. There are currently 132 nominal species belonging to 12 genera (Capa & Hutchings 2014;Dos Santos et al 2014). A recent revision of the family in Australia reported eleven species belonging to five genera, eight of them described as new .…”

Some Pycnogonida (Arthropoda: Chelicerata) from the "Paulo Young" Invertebrate Collection (CIPY) of the Federal University of Paraíba (UFPB), Brazil

“…The publication of biological information based on material deposited in the CIPY occurred punctually until the year 2000 (Young & Christoffersen 1984;Veloso & Melo 1993;Melo & Veloso 2005). Papers were produced more systematically since 2008, dealing with diverse groups, such as Crustacea (Riul et al 2008;Rodrigues et al 2009), Polychaeta (Santos et al 2008(Santos et al , 2010(Santos et al , 2011(Santos et al , 2014de Assis et al 2007de Assis et al , 2008ade Assis et al ,b, 2012Brito et al 2013), Echinodermata (Gondim et al 2013a(Gondim et al ,b, 2015Prata et al 2012Prata et al , 2014aPrata et al ,b, 2016, and Mollusca (Dias et al 2013;Lima et al 2013Lima et al , 2017aLima & Guimarães 2015;, include inventories of benthic macrofauna (Gondim et al 2011) and biological associations (Lima et al , 2017b. However, most of the available information has not been published in scientific journals, having been cited only in monographies, dissertations, thesis and congress/conference abstracts, which makes access to this information more difficult for the scientific community.…”

Obituary: André Souza dos Santos (1983–2015)

“…His PhD was on the taxonomy and phylogeny of Sabellariidae (Annelida: Polychaeta). He left eight published papers on annelid polychaetes: Santos et al (2009Santos et al ( , 2010Santos et al ( , 2011Santos et al ( , 2014 Mattos et al (2013). He also participated in several national and international meetings.…”