Specific status of <i>Echinocardium cordatum, E. australe</i> and <i>E. zealandicum</i> (Echinoidea: Spatangoida) around New Zealand, with comments on the relation of morphological variation to environment
書誌事項
- 公開日
- 1974-08
- 権利情報
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- http://onlinelibrary.wiley.com/termsAndConditions#vor
- DOI
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- 10.1111/j.1469-7998.1974.tb04127.x
- 公開者
- Wiley
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説明
<jats:p>The specific status of the heart‐urchin <jats:italic>Echinocardium cordatum</jats:italic> (Pennant) around New Zealand is discussed in the context of the suggestion that the New Zealand form of this spatangoid is sufficiently distinct from <jats:italic>E. cordatum</jats:italic> to be regarded as a separate species, namely <jats:italic>E. australe</jats:italic> Gray or <jats:italic>E. zealandicum</jats:italic> Gray. A brief history of the problem is outlined and it is demonstrated that, from the beginning of the present century, specialist opinion has favoured the unitary species concept and been unenthusiastic about the validity of Gray's species. The pattern of variability revealed by a comparative morphological study of <jats:italic>E. cordatum</jats:italic> from the British Isles and <jats:italic>E. australe/zealandicum</jats:italic> from New Zealand did not support the specific separation of the Australasian species. Alternatively, it is proposed that the morphological structure of the test in <jats:italic>E. cordatum</jats:italic> may be considerably influenced by sediment texture and that the distinctiveness of some of the New Zealand specimens is related to their occupation of very fine deposits, which are not commonly exploited by <jats:italic>E. cordatum</jats:italic> around the British Isles.</jats:p>
収録刊行物
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- Journal of Zoology
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Journal of Zoology 173 (4), 451-475, 1974-08
Wiley
