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Article
Siphonal zone structure in the cuttlebone of Sepia officinalis
The evolutionary process through which the siphonal zone of the cuttlebone of Sepia replaced the tubular siphuncle seen in other shelled cephalopods is poorly understood. Recently, porous connecting stripes, inte...
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Article
Crystalline structure, orientation and nucleation of the nacreous tablets in the cephalopod Nautilus
The nacreous tablets in the Nautilus shell have similar crystalline structure as the tablets in the gastropod Gibbula shell. Etching with Mutvei’s solution reveals that each tablet is composed of vertical crystal...
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Article
Using ocean quahog (Arctica islandica) shells to reconstruct palaeoenvironment in Öresund, Kattegat and Skagerrak, Sweden
Shells of Arctica islandica collected between 1884 and 2004 from Öresund, Kattegat and Skagerrak (Swedish West Coast) were used to monitor local climate variations and the influence of human activities on the loc...
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Article
Structural relationship between interlamellar organic sheets and nacreous tablets in gastropods and the cephalopodNautilus
The nacreous tablets in gastropods and the cephalopodNautilus are composed of three calcareous layers: a principal, thick, finely granular layer and two thin, coarse-granular layers, one covering the upper surfac...
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Chapter
Connecting Ring Ultrastructure in the Jurassic Ammonoid Quenstedtoceras with Discussion on Mode of Life of Ammonoids
It was generally assumed (e.g., Mutvei, 1967, 1975; Grégoire, 1984; Westermann, 1971, 1982, 1993, 1996; Bandel, 1981; Obata et al., 1980; Tanabe, 1977, 1979; Hewitt et al., 1993; Kulicki, 1994; Hewitt, 1996) t...
