New sponge species from Seno Magdalena, Puyuhuapi Fjord and Jacaf Canal (Chile) Author Bertolino, Marco 71370556-B858-471C-B544-5641E2243080 Dipartimento di Scienze della Terra dell’Ambiente e della Vita (DISTAV), Università degli Studi di Genova, Corso Europa, 26 - 16132 Genova, Italy. marco.bertolino@unige.it Author Costa, Gabriele 9712037F-157D-477D-AA5E-7111C26CAE1D Dipartimento di Scienze della Terra dell’Ambiente e della Vita (DISTAV), Università degli Studi di Genova, Corso Europa, 26 - 16132 Genova, Italy. gabrielec1987@gmail.com Author Bavestrello, Giorgio 4D585539-D4B7-4EB1-ABAD-629D9A547C9E Dipartimento di Scienze della Terra dell’Ambiente e della Vita (DISTAV), Università degli Studi di Genova, Corso Europa, 26 - 16132 Genova, Italy. giorgio.bavestrello@unige.it Author Pansini, Maurizio 7F4DA865-D72F-45FA-ABC5-81187748E6BF Dipartimento di Scienze della Terra dell’Ambiente e della Vita (DISTAV), Università degli Studi di Genova, Corso Europa, 26 - 16132 Genova, Italy. pansisml@gmail.com Author Daneri, Giovanni C4E24C36-8D7E-44B2-B0C8-4BB56A4B7A2D Centro de Investigación en Ecosistemas de la Patagonia (CIEP), Moraleda 16 Coyhaique, Chile. & Programa COPAS Sur Austral Universidad de Concepción, Barros Arana, Concepción, Chile. gdaneri@ciep.cl text European Journal of Taxonomy 2020 2020-09-10 715 1 49 journal article 20981 10.5852/ejt.2020.715 775fa0af-c6d1-4679-80cc-c756b01d1743 4022397 08022AE1-B293-4D42-9733-AC4845E656B7 Axinella cylindrica Bertolino , Costa & Pansini sp. nov. urn:lsid:zoobank.org:act: 21616DF2-8C48-428E-8631-C6A2553E214C Figs 3–4 ; Table 4 Etymology The new species is named after the body shape. Type material Holotype CHILE – Puerto Cisnes • Seno Magdalena B ; 44.650167° S , 72.89085° W ; depth 20 m ; 5–10 Aug. 2016 ; Marco Bertolino leg.; on a rocky cliff by scuba diving ; CILE 1 ; MSGN 61493 . Paratypes CHILE – Puerto Cisnes • 1 specimen ; Seno Magdalena D ; 44.614863° S , 72.958312° W ; depth 18 m ; 5–10 Aug. 2016 ; Marco Bertolino leg.; on a rocky bottom by scuba diving ; CILE 37; DISTAV • 1 specimen ; Seno Magdalena E; 44.613885° S , 72.941490° W ; depth 15 m ; 5–10 Aug. 2016 ; Marco Bertolino leg.; on a rocky cliff by scuba diving ; CILE 23; DISTAV • 1 specimen ; Seno Magdalena D; 56.616666° S , 72.716666° W ; depth 20 m ; 5–10 Aug. 2016 ; Marco Bertolino leg.; on a rocky wall by scuba diving ; CILE 81; DISTAV . Description HABITUS. All of the specimens have a regular cylindrical shape ( 5–7 cm high, ca 1 cm in diameter) ( Fig. 3A ). Surface lightly hispid, consistence firm. Colour in life bright yellow ( Fig. 3A ). SKELETON. Skeleton formed by network of thin ascending plurispicular fibres forming quadrangular meshes with abundant spongin ( Fig. 3B ). Choanosome differentiated in axial compressed region ( Fig. 3D ) and extra-axial plumoreticulate part ( Fig. 3 C–D). Ectosome formed by erect spicule brushes, hispidating sponge surface, supported by terminal part of choanosomal ascending fibres ( Fig. 3 C–D). SPICULES. Megascleres: Styles smooth, straight or slightly curved, with regular, round heads ( Fig. 4A ), 700–(832.5)–960 μm long and 20–(25.2)–32.5 μm thick in holotype . Rhabdostyles smooth with pronounced basal bend ( Fig. 4B ), 240–(296.5)–435 μm long and 15–(17)–20 μm thick in holotype . Oxeas smooth, more or less folded, 197.5–(346)–425 μm long and 12.5–(18.7)–22.5 μm thick in holotype . The thinnest ones are almost straight or slightly flexuous ( Fig. 4C ). Measurements of spicule of all collected specimens ( holotype and paratypes ) are reported in Table 4 . Habitat This species lives on a rocky cliff covered by coralline algae, at a depth between 15 and 20 m . Remarks We have recorded two new species of the genus Axinella and have therefore chosen to make a single discussion after their description.