title: Two new species of Hexactinellida (Porifera) from the South China Sea.
abstract: In this paper, two new sponge species, Semperella jiaolongae sp. nov. (Amphidiscosida, Pheronematidae) and Saccocalyx microhexactin sp. nov. (Lyssacinosida, Euplectellidae) are described based on materials from the South China Sea. Semperella jiaolongae sp. nov. is diagnosed mainly by the dermal areas present on both sides of the body, occurring together with atrial areas randomly distributed on one side, and the distinctive shape of micropentactins. Saccocalyx microhexactin sp. nov. is characterized by possession of two types of drepanocomes and one of microhexactins. An analysis based on partial sequence of the 16S rRNA gene was undertaken to show the congruence between morphological identification and phylogenetic classification of the two new species.
authors.affiliation: Institute of Oceanology, Chinese Academy of Sciences, 7 Nanhai Road, Qingdao 266071, China Graduate University, University of Chinese Academy of Sciences, Beijing 100039, China; Email: unknown.
authors.forename: Lin
authors.initials: L
authors.lastname: Gong
authors.affiliation: Institute of Oceanology, Chinese Academy of Sciences, 7 Nanhai Road, Qingdao 266071, China; Email: lixzh@qdio.ac.cn.
authors.forename: Xinzheng
authors.initials: X
authors.lastname: Li
authors.affiliation: Department of Biology, Hong Kong Baptist University, Hong Kong, China; Email: unknown.
authors.forename: Jian-Wen
authors.initials: JW
authors.lastname: Qiu
mesh_terms: D063147:Animal Distribution; D000825:Animal Structures / Q000033:anatomy & histology / Q000254:growth & development; D000818:Animals; D049628:Body Size; D002681:China; D017753:Ecosystem; D009929:Organ Size; D010802:Phylogeny; D011161:Porifera / Q000033:anatomy & histology / Q000145:classification* / Q000235:genetics / Q000254:growth & development; D012336:RNA, Ribosomal, 16S / Q000235:genetics
chemical_list: D012336:RNA, Ribosomal, 16S