Osteology and some other morphological characters of Howella sherborni, with a discussion of the systematic position of the genus (Perciformes, Percoidei)

Abstract

First the description of osteology and some morphological characters of the oceanic percoid, Howella sherborni, is given. Specific traits of Howella include features of the skullcap, bulla otica, and periocular bones, specific spiking of opercular bones, denticular contact of cerato-and epihyale from both sides, the presence of three rays on epihyale, and limited dental plates on basoibranchialia 2–3 and on lower pharyngeal bones; the presence of one strong spike on posttemporale, 1½ radialia associated with coracoideum, absence of articulation between the pterygiophores D1 and D2 (carrying of the spine D2), and the presence of a free pterygiophore, lacking a separated distal element, 10 + 16 vertebrae modified scales, and some other characters. The family-rank position of Howella is discussed. Taking into consideration some common specializations in genera Howella, Pseudohowella, and Bathysphyraenops, not indicated in other families of percoid fishes, I express an opinion on the possibility of restoration of the family Howellidae.