New shallow-water sponges (Porifera) from the Galápagos Islands Author Sim-Smith, Carina Author Hickman, Cleveland 0000-0002-2914-4687 hickman.c@rockbridge.net Author Kelly, Michelle 0000-0001-9673-0056 elly@niwa.co.nz text Zootaxa 2021 2021-08-02 5012 1 1 71 http://dx.doi.org/10.11646/zootaxa.5012.1.1 journal article 10.11646/zootaxa.5012.1.1 1175-5326 5158062 56C6852D-AAE0-4B6B-AB57-919CD62DAEC1 Haliclona ( Soestella ) roslynae sp. nov. ( Fig.10 , Table 2 ) Material examined. Holotype — MCCDRS9443, Punta Vicente Roca , Isabela Island , 0.049° S , 91.558° W , 18 m , 15 Nov 2003 . Type locality. Punta Vicente Roca , Isabela Island . Habitat and distribution. Only known from type locality. Found growing on rock; 18 m . Description. Thickly encrusting, cavernous sponge, ≤ 10 mm thick, with a densely punctate surface. Large, raised oscules, ≤ 5 mm in diameter, are scattered over the surface. Colour in life is a beautiful, translucent water- melon pink with tinges of yellow and purple, colour in ethanol is golden brown ( Fig. 10A–B ). Texture is very soft, friable. Skeleton. Choanosome is a loose subisotropic reticulation of small oxeas that form rounded meshes around frequent choanosomal spaces ( Fig. 10C ). Ill-defined paucispicular primary tracts are visible in places, connected by unispicular secondary tracts ( Fig. 10D ). Ectosome is a marked, loosely formed tangential reticulation ( Fig. 10E ); spongin is present at nodes. Spicules. Megascleres— small oxeas, slightly curved with sharply pointed tips; 107 (93–117) × 6 (5–7) µm (n = 20) ( Fig. 10F ). Etymology. Named for Roslyn Cameron, a local face and voice for Galápagos conservation representing the Charles Darwin Foundation since 1997, and liaison to the US-based Galápagos Conservancy from 2012. Roslyn was often the first point of contact for innumerable visitors, media representatives, and donors to the Galápagos . Remarks. Haliclona ( S. ) roslynae sp. nov. is a different colour in life and has smaller oxeas than Haliclona ( S. ) spuma sp. nov. and has a substantially denser choanosomal and ectosomal skeleton. Haliclona ( S. ) roslynae sp. nov. can be differentiated from the only other tropical/subtropical eastern Pacific Haliclona ( Soestella ) species, H. caerulea , by the lack of microscleres. The six species of Haliclona (subgenus unknown) from the eastern Pacific, as described for Haliclona ( H. ) clairae sp. nov. above, all differ from this species as outlined in Table 2 .