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Larval development of the hooked mussel, Brachidontes recurvus Rafinesque (Bivalvia: Mytilidae) including a literature review of the larval characteristcs of the Mytilidae
Chanley, Paul
Chanley, Paul
Abstract
Brachidontes recurvus larvae were reared from eggs in the laboratory. Larval length increased from 90-220 μ, during shelled stages with straight-hinge stage from 90-165 μ,, umbo stage from 135-220 μ,, and pediveliger stage from 165-220 μ,. Height was 23 ± 10 μ. less than length. Depth was 54 + 15 μ, less than length. The hinge line increased with growth and ranged from 68-84 μ,- Hinge structure consisted of small taxodont hinge teeth over the entire hinge line with teeth becoming larger at both ends. Larvae are typical D-shaped mytilid larvae during straight hinge stages but develop a conspicuous, broadly rounded umbo and steeply sloping shoulders. Ends are blunt and the ventral margin flattened. The eyespot appears at a length of about 165 μ. Larvae are more likely to be confused with larvae of Modiolus demissus than those of other bivalves.
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1970
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Biological Sciences Peer-Reviewed Articles
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Virginia Institute of Marine Science