Bryozoans from Chella Bank (Seco de los Olivos), with the description of a new species and some new records for the Medi
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ORIGINAL PAPER
Bryozoans from Chella Bank (Seco de los Olivos), with the description of a new species and some new records for the Mediterranean Sea Laís V. Ramalho 1
&
José A. Caballero-Herrera 2
&
Javier Urra 3
&
José L. Rueda 3
Received: 22 June 2020 / Revised: 10 September 2020 / Accepted: 14 September 2020 # Senckenberg Gesellschaft für Naturforschung 2020
Abstract Chella Bank (also known as Seco de los Olivos seamount) is a volcanic submarine elevation (76–700 m deep) located ca. 16 km off the southern coast of Spain, within the Alboran Sea, in the Atlantic-Mediterranean transition zone. It represents a biodiversity hotspot for Europe, with more than 600 species listed to date, and contains several habitats included in the EU Habitats Directive. During three ship-based expeditions, several areas of Chella Bank were surveyed and sampled in a depth range of 95–729 m, resulting in new records that improve our knowledge on poorly studied phyla, such as bryozoans. In 14 of the 21 samples examined during this study, 43 bryozoan taxa could be identified. Among these, one species is described as new to science (Buskea medwaves sp. nov.) and three other ones are reported for the first time from the Mediterranean Sea, namely Terminoflustra barleei (Busk, 1860), Marguetta pulchra Jullien in Jullien & Calvet, 1903, and Schizomavella (Schizomavella) linearis profunda Harmelin & d’Hondt, 1992a. Some species were abundant in the samples, such as Adeonellopsis distoma (Busk, 1859), B. medwaves sp. nov., Entalophoroecia cf. deflexa, and Reteporella pelecanus López de la Cuadra & GarcíaGómez, 2001. The highest species richness was detected in rhodolith beds and on coral rubble bottoms (especially exposed above the sediments) compared with other bottom types and habitats such as sandy bottoms and muddy bottoms. The finding highlights the importance of these environments for bryozoans. Keywords Alboran Sea . Cheilostomatida . Cyclostomatida . Rhodoliths . Coral rubble . Marine protected area
Introduction The Alboran Sea, located in the Western Mediterranean Sea between the southern Iberian Peninsula and northern Africa, has a surface of 55,000 km2 and a maximum depth of ca. 2000 m. It harbours a heterogeneous seafloor with submarine canyons, active faults, valleys, plateau, mounds, mud volcanoes, This article is registered in ZooBank under http://zoobank.org/FEE571D4B13A-4DCC-85DB-C27D3A4D57B5 Communicated by B. W. Hoeksema * Laís V. Ramalho [email protected] 1
Museu Nacional, Universidade Federal do Rio de Janeiro, Quinta da Boa Vista s/n, São Cristóvão, Rio de Janeiro, RJ 20940-040, Brazil
2
Departamento de Biología Animal, Facultad de Ciencias, Universidad de Málaga, 29071 Málaga, Spain
3
Centro Oceanográfico de Málaga, Instituto Español de Oceanografía, Puerto Pesquero s/n, Fuengirola, 29640 Málaga, Spain
ridge banks and seamounts (Maldonado and Comas 1992; Würtz et al. 2015). The Alboran Sea is connected to the Atlantic Ocean, through the Strait of Gibraltar. It has unique hydrodynamics (Parrilla and Kinder
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