DOI: 10.1017/s0025315400006445. The Larval Shell of Some Prosobranch Gastropods

The Larval Shell of Some Prosobranch Gastropods

10.1017/s0025315400006445

Crossref journal-article

Cambridge University Press (CUP)

Journal of the Marine Biological Association of the United Kingdom (56)

Abstract

Growth of shells of larvae ofNassarius reticulatus(L.) andCrepidula fornicata(L.) reared in the laboratory under constant temperature (14 °C) and illumination (155 lx) occurs by the addition of successive strips secreted at the mantle edge. Growth lines on the embryonic teloconch also indicate intermittent growth; the protoconch secreted by the shell gland has no such lines. There is evidence that growth periods are short and pauses separating them prolonged. The diameter of the older whorls of the shells of these and six other species examined increase with the volume of the viscera. This change in diameter is made possible by the flexibility of the organic matrix, the funda-mental constituent of the shell. The matrix, secreted as fibres at the mantle edge, forms sheets, and provides sites for the deposition of calcareous concretions; at metamorphosis the concretions apparently initiate the formation of crystals. The concretions also sculpture the surface of the shell producing a pattern sufficiently conspicuous to allow identification of some species with the aid of only the stereomicroscope. For example, large concretions form longitudinal rows over the protoconch and teloconch ofLittorina neritoides(L.) and smaller ones combine to form a more decorative pattern inRissoa sarsiLoven. In other species details of the surface design require a scanning electron micro-scope. Interspecific differences in the arrangement of concretions may be traceable to differences in the pallial glands which secrete the matrix.

Bibliography

Fretter, V., & Pilkington, M. C. (1971). The Larval Shell of Some Prosobranch Gastropods. Journal of the Marine Biological Association of the United Kingdom, 51(1), 49â62.

Authors 2

Vera Fretter (first)
Margaret C. Pilkington (additional)

References 20 Referenced 21

10.1007/BF01609930
10.1083/jcb.9.4.761
10.1007/BF01609929
{'key': 'S0025315400006445_ref001', 'first-page': '69', 'article-title': 'Microtextural variation in pelecypod shells', 'volume': '2', 'author': 'Barker', 'year': '1964', 'journal-title': 'Malacologia'} / Malacologia / Microtextural variation in pelecypod shells by Barker (1964)
10.1007/BF01610508
10.1017/S0022336000061655 / J. Palaeont. / Biological and environmental rhythms reflected in molluscan shell growth by Pannella (1968)
{'key': 'S0025315400006445_ref008', 'first-page': '1', 'article-title': 'La trame protidique des nacres et des perles', 'volume': '31', 'author': 'Grégoire', 'year': '1955', 'journal-title': 'Annls Jnst. océanogr., Monaco'} / Annls Jnst. océanogr., Monaco / La trame protidique des nacres et des perles by Grégoire (1955)
{'key': 'S0025315400006445_ref010', 'first-page': '1', 'article-title': 'Further studies on structure of the organic components in mother-of-pearl, especially in pelecypods (Part 1)', 'volume': '36', 'author': 'Grégoire', 'year': '1960', 'journal-title': 'Bull. Inst. r. Sci. nat. Belg.'} / Bull. Inst. r. Sci. nat. Belg. / Further studies on structure of the organic components in mother-of-pearl, especially in pelecypods (Part 1) by Grégoire (1960)
{'key': 'S0025315400006445_ref005', 'first-page': '177', 'article-title': 'The value of the nuclear characters in the classification of marine gastropods', 'volume': '14', 'author': 'Dall', 'year': '1924', 'journal-title': 'J. Wash. Acad. Sci.'} / J. Wash. Acad. Sci. / The value of the nuclear characters in the classification of marine gastropods by Dall (1924)
10.1038/197306b0
10.1098/rstb.1937.0012
10.1111/j.1469-185X.1967.tb01480.x
10.1111/j.1096-3642.1955.tb00624.x
Fretter V. & Pilkington M. C. , 1970. Prosobranchia. Veliger larvae of Taenioglossa and Stenoglossa. Fich. Idem. Zoopl., Sheets 129–32, 22 pp.
10.1083/jcb.3.5.797
{'key': 'S0025315400006445_ref006', 'first-page': '375', 'article-title': 'Aspects of metamorphosis in prosobranch gastropods', 'volume': '38', 'author': 'Fretter', 'year': '1969', 'journal-title': 'Proc. malac. Soc. Lond.'} / Proc. malac. Soc. Lond. / Aspects of metamorphosis in prosobranch gastropods by Fretter (1969)
10.1038/2191384a0
10.1083/jcb.4.3.281
10.1007/BF00406042
10.2307/3223940

Dates

Type	When
Created	16 years, 3 months ago (May 12, 2009, 12:37 p.m.)
Deposited	5 years, 3 months ago (May 17, 2020, 10:53 p.m.)
Indexed	3 months, 1 week ago (May 13, 2025, 9:32 p.m.)
Issued	54 years, 6 months ago (Feb. 1, 1971)
Published	54 years, 6 months ago (Feb. 1, 1971)
Published Online	16 years, 3 months ago (May 11, 2009)
Published Print	54 years, 6 months ago (Feb. 1, 1971)

Funders 0

None

BibTeX

@article{Fretter_1971, title={The Larval Shell of Some Prosobranch Gastropods}, volume={51}, ISSN={1469-7769}, url={http://dx.doi.org/10.1017/s0025315400006445}, DOI={10.1017/s0025315400006445}, number={1}, journal={Journal of the Marine Biological Association of the United Kingdom}, publisher={Cambridge University Press (CUP)}, author={Fretter, Vera and Pilkington, Margaret C.}, year={1971}, month=feb, pages={49–62} }

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