Growth Stages of Moroteuthis Robusta (Verrill, 1881) with the Re-evaluation of the Genus
Abstract:Based on sequential growth stages of Moroteuthis robusta, M. japonica and M. pacifica are synonymous with M. robusta, and smaller stages are bridged to the Onykia “carribaea” species complex. Within the family Onychoteuthidae, the genus Onykia has in common with the genus Moroteuthis the absence of both visceral photophores and dorsal nuchal folds. Young Moroteuthis have a smooth mantle surface with a distinct iridescence, a small number of marginal suckers on the tentacular club and an indistinct cartilageous cap on the endocone. While, large Onykia develop rhomboidal fins, an inverted Y-shaped cartilageous ridge in the funnel groove, and a reduced number of marginal suckers on the club, all of which characterize Moroteuthis. Close examination of a series of O. “carribaea” specimens reveals that the species is not monospecific, but contains more than one species. It is thus suggested that the genus Onykia, therefore, appears to represent juvenile stages of the genus Moroteuthis.
Document Type: Research Article
Publication date: September 1, 1991
More about this publication?
- The Bulletin of Marine Science is dedicated to the dissemination of high quality research from the world's oceans. All aspects of marine science are treated by the Bulletin of Marine Science, including papers in marine biology, biological oceanography, fisheries, marine affairs, applied marine physics, marine geology and geophysics, marine and atmospheric chemistry, and meteorology and physical oceanography.
- Editorial Board
- Information for Authors
- Subscribe to this Title
- Terms & Conditions
- Ingenta Connect is not responsible for the content or availability of external websites