On some frenulate species (Annelida: Polychaeta: Siboglinidae) from mud volcanoes in the Gulf of Cadiz (NE Atlantic)

Collections of Frenulata made by the RV Professor Logachev in the Gulf of Cadiz in 2006 contain two new species, one belonging to the genus Spirobrachia, and another that was assigned to a new genus. Spirobrachia tripeira n. sp. is the first record of the genus in the North Atlantic Ocean; it has a...

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Bibliographic Details
Published in:Scientia Marina
Main Authors: Hilário, Ana, Cunha, Marina R.
Format: Article in Journal/Newspaper
Language:English
Published: Consejo Superior de Investigaciones Científicas 2008
Subjects:
Siboglinidae
Frenulata
Pogonophora
mud volcano
Gulf of Cadiz
volcán de fango
Golfo de Cádiz
Elevado
Larga
Arctic
North Atlantic
Online Access:https://scientiamarina.revistas.csic.es/index.php/scientiamarina/article/view/853
https://doi.org/10.3989/scimar.2008.72n2361
Description
Summary:Collections of Frenulata made by the RV Professor Logachev in the Gulf of Cadiz in 2006 contain two new species, one belonging to the genus Spirobrachia, and another that was assigned to a new genus. Spirobrachia tripeira n. sp. is the first record of the genus in the North Atlantic Ocean; it has a very stiff, straight, orange tube; its tentacles have pinnules and are arranged in a spiral crown without a lophophore. Bobmarleya gadensis n. gen. et n. sp. is characterised by an unusually long tentacular crown composed of about 40 free tentacles. It shares many characteristics with the genus Oligobrachia but the large number and extreme length of the tentacles and a combination of other characters justify the designation of a new genus. The specimens of Lamellisabella denticulata Southward, 1978 collected during the M.S. Merian 03/01 cruise provide the first record of this species in the Gulf of Cadiz. Las colecciones de Frenulata realizadas por el RV Professor Logachev en el Golfo de Cádiz en 2006 contienen dos especies nuevas, una perteneciente al género Spirobrachia, y la otra asignada a un género nuevo. Spirobrachia tripeira sp. nov. constituye la primera cita del género para el Atlántico norte; tiene un tubo muy rígido, recto y naranja; los tentáculos tienen pínnulas y se disponen en forma de corona espiralada y sin lofóforo. Bobmarleya gadensis n. gen. et n. sp. se caracteriza por su corona tentacular inusualmente larga compuesta por aproximadamente 40 tentáculos libres. Comparte muchas características con el género Oligobrachia, pero el elevado número y la longitud extrema de sus tentáculos, junto con una especial combinación de caracteres, justifica la designación de un género nuevo. Los especimenes de Lamellisabella denticulata Southward, 1978 recolectados durante la campaña M.S. Merian 03/01 constituyen la primera mención de esta especie para el Golfo de Cádiz.

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