RESEARCH ARTICLE

Two new dwarfgobies from the Ryukyu Islands, Japan: Eviota shibukawai and Eviota filamentosa (Teleostei: Gobiidae)

Toshiyuki Suzuki & David W. Greenfield

Abstract

Two new species of dwarfgoby are described from the Ryukyu Islands, Japan. Eviota shibukawai n. sp. is characterized by cephalic sensory-pore system Pattern 2 (lacking only the G (IT) pore); a dorsal/anal fin-ray formula of 9/8 or 8/8; branched pectoral-fin rays; a dark, roundish spot on the caudal peduncle centered on the preural centrum region; six dark, narrow, internal postanal bars; and the body is heavily peppered with dark chromatophores. It lacks distinct dark spots on the pectoral-fin base and a postocular spot, and the genital papilla is neither fimbriate nor cup-like. Eviota filamentosa n. sp. is characterized by a unique cephalic sensory-pore system pattern (lacking the F' (AOT), G (IT) and preopercular-canal pores N' & O' (POP) pores); a dorsal/anal formula of 8/8; unbranched pectoral-fin rays; the 5th pelvic-fin ray absent; 19-21 lateral scales; and the genital papilla neither fimbriate nor cup-like.