The location of the holotype of Rhombus cocosensis Bleeker (presently known as Engyprosopon cocosensis) has been listed as unknown. The alleged holotype was found recently in Leiden (RMNH) and examined confirming it as the holotype. It has palmate gill rakers, a type of gill raker limited, within the Bothidae, to the genus Asterorhombus. Thus, Asterorhombus cocosensis is a nominal species of that genus. “Engyprosopon cocosensis” of has no palmate gill rakers and was an obvious misidentification made without examing the holotype. There is no junior synonym for this fish. The purpose of this paper is to name the species and redescribe it.
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Vol. 2003 • No. 4