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Kelly M, Schroeder L, Mullendore DL, Dattilo BF, Peters WS. Feeding behaviour and the operculum in Olividae (Gastropoda): the case of Callianax biplicata (G. B. Sowerby I, 1825). FOLIA MALACOLOGICA 2021. [DOI: 10.12657/folmal.029.001] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Abstract
Olividae are marine gastropods living as predators or scavengers on soft sediments. The complex prey handling behaviour of large predatory species includes the storage of food in a pouch formed temporarily by bending and contraction of the posterior foot. Such metapodial pouches had been observed only in Olividae that lack an operculum, prompting the hypothesis that the folding of the metapodium into a pouch biomechanically required the absence of the operculum. Here we report metapodial pouch formation in an operculate olivid, Callianax biplicata (formerly Olivella biplicata). Since the operculum is too small to close the shell aperture in mature C. biplicata, a protective function seems unlikely. The operculum may rather serve as an exoskeletal point for muscle attachment, but may also represent a ‘vestigial organ’ in the process of evolutionary reduction, or an ontogenetic remnant functional at early life stages but not at maturity. Consequently, our observations refute the notion that only inoperculate olivids can form pouches, but not necessarily the idea that the ability to form a metapodial pouch evolved in parallel with operculum reduction
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Rickert W, McBride-Warren P. Structural and functional determinants of Mucor miehei protease III. Isolation and composition of the carbohydrate moiety. ACTA ACUST UNITED AC 1974. [DOI: 10.1016/0005-2795(74)90425-5] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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Hunt S. Isolation of the new naturally occurring halogenated amino acid monochlorotyrosine from a molluscan scleroprotein. FEBS Lett 1972; 24:109-12. [PMID: 5086611 DOI: 10.1016/0014-5793(72)80838-x] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
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Hunt S, Breuer SW. Isolation of a new naturally occurring halogenated amino acid: monochloromonobromotyrosine. BIOCHIMICA ET BIOPHYSICA ACTA 1971; 252:401-4. [PMID: 5133533 DOI: 10.1016/0304-4165(71)90021-3] [Citation(s) in RCA: 29] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
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