01905nas a2200193   4500008004100000245013800041210006900179300001200248490000700260520117500267653002401442653002401466653001301490653002001503100002101523700001501544700001301559856013901572       1993                        eng d00aCosmopolitism in sponges : the "complex" Guitarra fimbriata with description of a new species of Guitarra from the Northeast Atlantic0 aCosmopolitism in sponges the complex Guitarra fimbriata with des  a367-3730 v573 a A new species of the genus Guitarra (G. laplani) is described from the Gibraltar region (Northeast Atlantic). The type material of the species, G. fimbriata Carter and G. voluta Topsent revised by scanning electron microscopy, and the results compared with descriptions from the literature. The results suggest G. voluta is a valid species and provide grounds for distinguishing two groups of specimens among those described under the name G. fimbriata. The first group is formed by North Atlantic deep specimens matching the holotype of G. fimbriata and is mainly characterized by tornostrongyloid megascleres, the presence of two categories of placochelae, and microspined pseudoisochelae. The second group, with an Indo-Pacific littoral distribution, would correspond to G. bipocillifera Broensted, characterized by oxeas tapering to long points as megascleres, one category of placochelae, and distinctive spiny isochelae. These results illustrate a new example of what was previously believed to be a cosmopolite species, that a thorough reexamination has shown to be a species complex, thus restricting the distribution of G. fimbriata s.s. to the North Atlantic.10aATLANTIQUE NORD-EST10aCOSMOPOLITE SPECIES10aGUITARRA10aPOECILOSCLERIDA1 aBoury-Esnault, N1 aPansini, M1 aUriz, MJ  uhttps://propetaxon.myspecies.info/cosmopolitism-sponges-complex-guitarra-fimbriata-with-description-a-new-species-guitarra-northeast-a01332nas a2200205   4500008004100000245009700041210006900138300000800207490000700215520065900222653001200881653001600893653001400909653001800923653001300941100002100954700001500975700001400990856012201004       1992                        eng d00aA new Discorhabdella (Porifera, Demospongiae), a new Tethyan relict of pre-Messinian biota? 0 anew Discorhabdella Porifera Demospongiae a new Tethyan relict of  a1-70 v263 aA new sponge species Discorhabdella hindei, is described from specimens found at a depth of 534-604 m off the Mediterranean side of the Gibraltar Strait (Alboran Sea). This species is closer to the New Zealand type species, D. incrustans, than to the other known species of the genus from the Azores, D. tuberosocapitata . The characteristic echinating acanthostyles of this new species closely resemble those found in Oligocene deposits from New Zealand. The similarity between the new species and the fossil pre-Messinian Indo-Pacific species, along with the strong differences from the Atlantic species, suggest a Tethyan affinity for this new species10aBATHYAL10aDEMOSPONGES10aGIBRALTAR10aMEDITERRANEAN10aPORIFERA1 aBoury-Esnault, N1 aPansini, M1 aUriz, M-J  uhttps://propetaxon.myspecies.info/a-new-discorhabdella-porifera-demospongiae-a-new-tethyan-relict-pre-messinian-biota