Morphometrics of the shell of three Sepia species (Mollusca: Cephalopoda): intra- and interspecific variation

Publication Type:Journal Article
Year of Publication:1997
Authors:Neige, P, Boletzky, SV
Journal:Zoologische Beitraege
Volume:38
Issue:2
Pagination:137-156
Keywords:Cephalopods, cuttlebone, morphometrics, Sepia
Abstract:

The shells (cuttlebones) of three species of Mediterranean cuttlefish, Sepia officinalis, S. orbignyana and S. elegans, are described in terms of homologous point (landmark) topology. Differences and similarities between the cuttlebones are localized and quantified using a method of geometrical morphometry (LSTRA). The results obtained show that experimental underfeeding in S. officinalis causes profound morphometrical modifications in comparison to normally developing, wild animals. In wild caught S. officinalis secual dimorphism is not distinct in the cuttlebone, in contrast to the underfed specimens. Interspecific analysis shows S. orbignyana and S. elegans to be morphologically more similar to one another than to S. officinalis. Available data on rDNA sequences and on morphological features (tentacular club, male copulatory arm) support this finding.

Wed, 2014-08-27 11:41 -- hannah