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-a00577nas a2200109   4500008004100000245017000041210006900211300001400280490000700294100002700301856013900328       1993                        eng d00aDie Polychaeten der 'Polarstern'-Reise ANT X/1b zur Antarktischen Halbinsel und Isla de los Estados (Feuerland, Argentinien) 1991. Teil 1: Polynoidae bis Iphitimidae0 aDie Polychaeten der PolarsternReise ANT X1b zur Antarktischen Ha  a127–1500 v881 aHartmann-Schröder, G.  uhttps://propetaxon.myspecies.info/die-polychaeten-der-polarstern-reise-ant-x1b-zur-antarktischen-halbinsel-und-isla-de-los-estados-feu