Abstract

The nomenclature and the type material of the entity presently known as Gelidiella pannosa (Feldmann) Feldmann & Hamel are considered. It is concluded that G. tenuissima Feldmann & Hamel is the correct name for the species lectotypified by the specimen located in the lower left corner of the herbarium sheet 7913802 of Herb. Thuret (PC, Paris), collected in Biarritz, France, on 25 June 1868. The following names are considered synonyms of G. tenuissima: Gelidium tenuissimum Thuret, G. pannosum Bornet non Grunow, G. pannosum Weber van Bosse, Echinocaulon pannosum Feldmann, Gelidiella pannosa (Bornet) Feldmann & Hamel, G. pannosa (Feldmann) Feldmann & Hamel, and G. tenuissima (Thuret) Feldmann & Hamel. Syntypes of this species are found in the Thuret Herbarium (PC, Paris) and in Holmes' Herbarium at the British Museum, London.