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Early post-metamorphic ontogenesis of deep-sea spatangoids (Echinoidea, Spatangoida) of the NE Atlantic Ocean

Sumida, P.Y.G., Tyler, P.A., Thurston, M. and Gage, J.D. (2001) Early post-metamorphic ontogenesis of deep-sea spatangoids (Echinoidea, Spatangoida) of the NE Atlantic Ocean Invertebrate Biology, 120, (4), pp. 378-385. (doi:10.1111/j.1744-7410.2001.tb00046.x).

Record type: Article


The early juvenile development of 3 species of irregular deep-sea echinoids of the NE Atlantic was examined using scanning electron microscopy. Although the post-metamorphic development of these 3 spatangoids is very similar, the morphology and development of fascioles (specialized bands of heavily ciliated minute spines) facilitates distinguishing the species. In Hemiaster expergitus and Spatangus raschi, the fascioles present in the early juvenile develop to form adult fascioles. In Brissopsis lyrifera, a juvenile fasciole of unknown function disappears during ontogenesis, and new adult subanal and periproct fascioles arise. Fascioles of S. raschi and B. lyrifera are present at a very early stage of development (0.7 mm test length), whereas in H. expergitus the fasciole appears much later (3 mm test length). Animals smaller than 0.8 mm test diameter have not yet developed a functional mouth and are still considered as endotrophic postlarval stages. Mouth development is similar for all spatangoids examined.

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Published date: November 2001


Local EPrints ID: 37636
ISSN: 1077-8306
PURE UUID: 08a4907b-69f4-4c6b-9732-3c2015b8c75c

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Date deposited: 24 May 2006
Last modified: 17 Jul 2017 15:41

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Author: P.Y.G. Sumida
Author: P.A. Tyler
Author: M. Thurston
Author: J.D. Gage

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