Crystal axes in recent and fossil adult echinoids indicate trophic mode in larval development
Abstract
The type of larval development in echinoids (Phylum Echinodermata) was found to determine crystal patterns in adult apical skeletal plates. This relation between larvae and adults will allow fossil species to be examined to determine the effects of developmental mode on evolutionary patterns, such as species longevity and speciation rate. Independent tests of hypotheses of such patterns now shown among fossil mollusks with and without feeding larvae can thus be performed.
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Emlet (1985) demonstrated that of the 10 apical plates in the adult echinoid test, the crystal axes of 6 are determined by the larval skeleton, while the other 4 are formed de novo.
“Emlet (1985) demonstrated that of the 10 apical plates found in the adult echinoid test, the crystal axes of 6 are determined by the crystal axes of the larval skeleton, while the other 4 are formed de novo.”
From Bilaterian Origins: Significance of New Experimental Observations (2000) · cites this paper as Emlet, 1985
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References 20 · Cited by 49
- Authors
- Emlet, R. B.
- Affiliations
- University of Washington (US)
- Corresponding author
- Emlet, Richard B.
- ORCID
- Emlet, Richard B.
- Venue
- Science
- Published
- 1985-11-22
- Volume
- 230
- Issue
- 4728
- Pages
- 937-940
- ISSN
- 0036-8075 (ISSN-L)
- 1095-9203
- OpenAlex
- W1994828149
- Cited by
- 49
- References
- 20
- Citations by year
- 2025: 2 · 2021: 1 · 2020: 2 · 2019: 1 · 2018: 1 · 2014: 2 · 2013: 1 · 2012: 1
- FWCI
- 3.50
- Type
- journal article
- Language
- en
- Open access
- closed
- Locations
- Science (publishedVersion)
- PubMed (publishedVersion)
- Topics
- Life Sciences › Agricultural and Biological Sciences › Aquatic Science › Echinoderm biology and ecology
- Physical Sciences › Earth and Planetary Sciences › Paleontology › Evolution and Paleontology Studies
- Physical Sciences › Earth and Planetary Sciences › Paleontology › Paleontology and Evolutionary Biology
- Keywords
- sea urchins, crystal axes, larval development, trophic mode, fossil echinoids, speciation rates, species longevity, evolutionary patterns
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