Uma nova espécie de Sabellariidae (Annelida: Polychaeta) de águas pouco profundas da Ilha da Madeira, Portugal, e Ilhas das Canárias, Espanha.

A new species of Sabellariidae (Annelida, Polychaeta), Lygdamis wirtzi, is described, based on material from Madeira and Canary Islands, northeastern Atlantic Ocean. The specimens were collected from sandy bottom at 7 to 14 m depth. The new species is characterised by the shape of the inner and outer paleae and of the nuchal hooks. The feeding position of living animals is described

Una nueva especie de Pista (>nnelida: Polychaeta: Terebellidae) de aguas someras de la bahía de Shizugawa, Costa de Sanriku (Japón)

A new species of the genus Pista (Annelida: Polychaeta: Terebellidae) was found on a boulder bottom in shallow waters of of Shizugawa Bay, Sanriku coast, northern Honshu, Japan. Individuals of this species measure 5 to 10 cm long and 3 to 5 mm wide. There are two pairs of branchiae on segments 2 and 3, each with an annulated long stalk and many dichotomous branches. The peristomium and segment 3 have elongate, semi-circular lateral lobes, segments 2 and 4 each have small lobes, segments 5 and 6 have very small lobes inserted between the neuropodium and ventral pad. Individuals of the new species have 17 pairs of notopodia from segment 4 and conical nephridial papillae on segments 6 and 7. The new Japanese species differs from all known species in the structure of the branchiae and the lateral lobes of anterior chaetigers.Una nueva especie de Pista (Annelida: Polychaeta: Terebellidae) fue encontrada en fondos someros de cantos rodados de la Bahía de Shizugawa, Costa de Sanriku (Norte de Honshu, Japón). Los individuos de esta nueva especie miden de 5 a 10 cm de largo y de 3 a 5 mm de ancho. Presentan 2 pares de branquias en los segmentos 2 y 3, cada uno con un largo pedúnculo anulado y ramas dicotómicas. El peristomio y el segmento 3 presentan lóbulos laterales elongados y semicirculares, los segmentos 2 y 4 presentan lóbulos pequeños y los segmentos 5 y 6 lóbulos muy pequeños insertados entre el neuropodio y la zona ventral. Los individuos de la nueva especie tienen 17 pares de notopodia, desde el segmento 4, y papilas nefridiales cónicas en los segmentos 6 y 7. La nueva especie difiere de las especies conocidas en la estructura de las branquias y los lóbulos de los setígeros anteriores. &nbsp

The polychaete Lygdamis wirtzi at Ascension and St Helena Islands (Annelida, Polychaeta, Sabellariidae)

The genus Lygdamis (Family Sabellariidae) currently contains 20 species (Hutchings et al. 2012; Capa et al. 2015). Lygdamis wirtzi Nishi and Núñez, 1999, was originally described from Madeira Island and the Canary Islands and has also been found at the Cape Verde Islands and at São Tomé Island (Wirtz 2001, 2003). New observations of this species were made while SCUBA diving at the coasts of Ascension and St Helena Islands in 2013 and 2015.info:eu-repo/semantics/publishedVersio

Newly detected lineage of Branchiomma and the first record of a fan worm Branchiomma sp. B sensu Capa et al. (2013) (Annelida: Sabellidae) from the Japanese Archipelago

The fan worm genus Branchiomma (Annelida: Sabellidae) includes 30 valid species. A previous study of the molecular phylogenetic assessment of Branchiomma indicates problems in using traditional morphological diagnostic characters for identification of Branchiomma species. We performed phylogenetic analysis based on the cytb gene sequences of recently collected specimens of Branchiomma from an artificial seawater pond in Iwaki, Fukushima, and from a boat mooring rope at Tanabe Bay, Shirahama, Wakayama, Japan. The Fukushima specimen was identified as a distinct lineage, which was genetically different from the other species of Branchiomma recognized by the previous study. The Shirahama specimens were included in the clade of Branchiomma sp. B sensu Capa et al. (2013) and were identified as this species. The haplotype network illustrated low genetic differences among Branchiomma sp. B specimens collected from Japan, Australia, Hawaii, Saipan, and Florida. More specimens and loci with higher substitution rates would be needed to discuss whether they are spread by unintentional or natural dispersal. The Shirahama specimens of Branchiomma sp. B morphologically differ from Branchiomma cingulatum, the only congener recorded from Japan, in having macrostylodes. However, a substantial revision of the genus and a detailed morphological description of the two species would be necessary to determine whether these two species are indeed distinct. The results of the present study represent the first record of Branchiomma sp. B sensu Capa et al. (2013) from Asia and further extend the known geographic distribution of this wide-ranging species. The 16S rRNA gene sequences were also obtained as reference sequences of DNA barcoding for future studies

Sabellaria tottoriensis n. sp. (Annelida: Polychaeta: Sabellariidae) from Shallow Water off Tottori, the Sea of Japan

A new species of the genus Sabellaria Lamarck, 1812 (Annelida: Polychaeta: Sabellariidae), is described from shallow water off Tottori, the Sea of Japan. Sabellaria tottoriensis n. sp., is gregarious with tubes constructed of sand and shell debris. The new species is distinguished by the character combination of 1 or 2 pairs of nuchal spines, two forms (long and short) of opercular paleae in the middle row, with the slender blades of long ones recurved outward. Detailed morphological features of the species are described and compared with other Japanese and worldwide congeners

Dos nuevas especies de Syllidae (Poluchaeta) de Japón

Two new species of Japanese Syllidae (Polychaeta) belonging to the genera Haplosyllis Langerhans, 1879 and Syllis Lamarck, 1818 are described. Haplosyllis crassicirrata n. sp. is characterized by its distinctly spindle-shaped thick dorsal cirri, with yellow granular inclusions, two unequal simple chaetae per parapodium, and the shape of the chaetae. Syllis marugani n. sp. is characterized by its distinct orange colour (in ethanol preserved specimens), long and broad dorsal cirri, compound chaetae having robust shafts in the posterior part of the body, and short blades strongly bidentate.  Se describen dos nuevas especies de sílidos (Polychaeta) japoneses pertenecientes a los géneros Haplosyllis Langerhans, 1879 y Syllis Lamarck, 1818. Haplosyllis crassicirrata n. sp. se caracteriza principalmente por poseer cirros anchos, fusiformes, con inclusions granulares de color amarillo en su interior, dos sedas simples desiguales por parápodo y por la forma de estas sedas. Syllis marugani n. sp. se caracteriza principalmente por poseer color naranja (en ejemplares preservados en etanol), cirros dorsales largos y anchos, y sedas compuestas con mangos robustos y angulosos en la parte posterior del cuerpo, y artejos cortos fuertemente bidentados. &nbsp

First record of Euborlasia nigrocincta Coe, 1940 (Nemertea: Heteronemertea) from the western Pacific

The heteronemertean Euborlasia nigrocincta Coe, 1940 was previously known exclusively from the eastern Pacific. A specimen collected on the Izu Peninsula, Honshu, Japan, herein identified as E. nigrocincta, represents the first record of the species from the western Pacific, increasing the western extent of the species’ known range by more than 8300 km and indicating an amphi-Pacific distributio

Notaulax yamasui sp. n. (Annelida, Sabellidae) from Okinawa and Ogasawara, Japan, with notes on its ecology

Este artículo contiene 16 páginas, 5 figuras.The polychaete Notaulax yamasui sp. n. (Sabellidae) is described from Okinawa and Ogasawara, south Japan, where it was found living embedded in a dead skeleton of the coral Porites sp. The new species is characterized by the presence of a pigmented sub-distal swelling on the tips of the crown radioles, a unique feature among species of the genus. Besides, its collar chaetae have an L-shape orientation, and the dorsal basal flanges of the branchial lobes are long and have a dorsal joint.Peer reviewe

Nomenclatural checklist for Acromegalomma species (Annelida, Sabellidae), a nomen novum replacement for the junior homonym Megalomma Johansson, 1926

Este artículo contiene 20 páginas.Acromegalomma, nomen novum, is introduced as a replacement name for the polychaete genus Megalomma Johansson, 1926 (Annelida, Sabellidae), preoccupied by Megalomma Westwood, 1842 (Insecta, Coleoptera, Carabidae). The historical background of the homonymy and a full list with 36 new combinations in the new genus are included, while two species are considered as species inquirenda.This work was financially supported by the European Community's Seventh Framework Programme (FP7/2007-2013), through the Assemble Grant Agreement no. 227799-ASSEMBLE to the project “Biodiversity of Annelida Polychaeta in the Ria Formosa coastal lagoon: a baseline study”, awarded to J.G. and developed at the CCMAR, University of Algarve (Faro, Portugal).Peer reviewe