First report of the mitrate Lagynocystis (Echinodermata: Stylophora) in the Ordovician of the Baltic paleobasin
Two partial mitochondrial gene sequences (COI and 12S-rRNA) suggested that Ceramaster japonicus (Sladen, 1889) and Ceramaster patagonicus (Sladen, 1889) (Asteroidea: Goniasteridae) from the Japanese waters are probably of the same species
First record of symbiosis of the brittle star Ophiocnemis marmorata (Echinodermata: Ophiuroidea: Ophiotrichidae) on jellyfish of the genus Rhopilema (Cnidaria: Scyphozoa) in Vietnamese waters
A geometric morphometric analysis of Arachnoides placenta (Echinoidea: Clypeasteroida): An examination of ontogenetic development and morphological variation
First observation of the "double-faced X-framed cup ossicle" extracted from a deep sea holothurian in Japan
Experimental hybridization of sympatric temnopleurid sea urchins living in Yamaguchi, Japan
Reinterpretation of the enigmatic Ordovician genus Bolboporites (Echinodermata)