Tylerius, a New Generic Name for the Indo-Pacific Pufferfish, Spheroides Spinosissimus Regan, 1908 (Tetraodontiformes: Tetraodontidae) and Comparisons with Amblyrhynchotes (Bibron) Duméril

Tylerius new genus, is proposed for Spheroides spinosissimus Regan. It is distinguished from other tetraodontids by the following combination of characters: nasal papilla with two nostrils; dorsal eye rim only adnate; no ventrolateral skinfold; well developed upper and lower lateral lines extending along body to caudal fin base. A new diagnosis is given for Amblyrhynchotes (Bibron) Duméril, to which Tylerius is closely related. The two genera differ in skull osteology, particularly in the ethmoid-frontal-parasphenoid region, and also in a number of external morphological features.