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A new species of Macandrewia Gray from a seamount near Yap Trench in the Western Pacific Ocean was described. Macandrewia yapensis sp. nov. is distinct from its congeners by possessing a foliate shape with contorted lamellae, tuberculiform terminations of desmas, and unique size of spicules. This is the third species of Macandrewia described from the Pacific Ocean. In addition, a partial sequence of COI gene was obtained from the new specimen and then it submitted to GenBank. Phylogenetic tree constructed with the partial COI sequences appears to exhibit a more congruent relationship with morphological data of macandrewiid species compared to 28S gene tree. [ABSTRACT FROM AUTHOR]

We describe Lophophysema eversa sp. nov. (Porifera, Hexactinellida, Hyalonematidae) based on a single specimen collected from the South China Sea at a depth of 3683 m. The new species can be distinguished from the three known congeners by its unusual body shape with basalia on the side of the body, the lack of macramphidiscs, the combination of the pinular pentactins having spiny tangential rays and the pinular ray of atrialia longer than dermalia and canalaria. This is the first record of the genus Lophophysema from the South China Sea. We also use a partial sequence of the 16S rRNA gene to confirm the family assignment of the new specimen.