Segutilum cornelii Whitley, 1944 Kyphosus cornelii, the Western buffalo bream, Cornel's drummer or the Western drummer, is a species of marine ray-finned fish, a sea chub belonging to the family Kyphosidae.

The main difference from the silver drummer is the more distinctly forked tail and the pale caudal fin margin and the suborbital dark moustache.

[2] Kyphosus cornelii is found on coral and rock reefs at depths of 20 metres (66 ft)[2] in inshore waters.

[2] Kyphosus cornelii was first formally described in 1944 by the Australian ichthyologist Gilbert Percy Whitley (1903-1975) with the type locality given as the Houtman Abrolhos archipelago in Western Australia.

[4] The specific name commemorates the Dutch apothecary, mutineer and murderer Jeronimus Cornelisz (1598-1691) who was shipwrecked on the merchant ship Batavia on the Houtman Abrolhos and subsequently prosecuted and executed for his murderous leadership of his fellow shipwreck survivors on the islands.