Antho brattegardi sp.n. (Porifera: Poecilosclerida), with remarks on and a key to the Clathriids of Norwegian waters

Recent collecting of sponges in the Bergen area yielded a new species of Antho, showing similarity to the Californian Jia jia DE LAUBENFELS, 1930, and some other interesting clathriid sponges. The genus Jia DE LAUBENFELS, 1930 is here synonymized with Antho GRAY, 1867. The name ‘croca’ is proposed for the unusual J-shaped spicule type found in the Californian species and in the new Norwegian species. Clathria etenichela (ALANDER, 1942) and C. armata (BOWERBANK, 1866) are recorded new to the Norwegian fauna. The Norwegian clathriids are discussed and some nomenclatorial changes are proposed. A key to the Norwegian clathriids concludes the paper.