Shell structure characteristics of pelagic and benthic molluscs from Antarctic waters

Waka Sato-Okoshi, Kenji Okoshi, Hiroshi Sasaki, Fumihiro Akiha

Research output: Contribution to journalArticlepeer-review

6 Citations (Scopus)

Abstract

The surface of the shell of the pelagic Antarctic gastropod, Limacina helicina antarctica forma antarctica, was smooth, with rib-like structures also observed. The larger specimen, with six to seven whorls, had visible ribs on its most outer whorl. The shell thickness of L. helicina antarctica forma antarctica was very thin, approximately 5-7 μm, on an individual with a shell diameter of 1.4 mm. Shell microstructure, as examined by SEM, was composed mostly of a crossed-lamellar structure. Shell thickness of the dominant benthic bivalve Laternula elliptica, was approximately 99-132 μm on an individual of shell length 19 mm. It was composed of two calcareous layers, including a thick outer homogeneous or granular layer and a thin nacreous inner layer. The characteristics of shell structure are discussed with reference to previous results, and in terms of adaptation to Antarctic waters.

Original languageEnglish
Pages (from-to)257-261
Number of pages5
JournalPolar Science
Volume4
Issue number2
DOIs
Publication statusPublished - 2010 Aug

Keywords

  • Laternula elliptica
  • Limacina helicina antarctica forma antarctica
  • Pteropoda
  • Shell structure

ASJC Scopus subject areas

  • Ecology, Evolution, Behavior and Systematics
  • Aquatic Science
  • Ecology
  • Earth and Planetary Sciences(all)

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