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Larval development of the large blood clam, Noetia ponderosa (Say)
Chanley, Paul E.
Chanley, Paul E.
Abstract
Larvae of Noelia ponderosa were raised from eggs in laboratory cultures. Lengths increased frorn 80 to 210μ, over a 4-week free- swimmining period. Height is 15 μ, less than length in small larvae but as much as 55 μ, less than length when larvae are ready to metamorphose. Depth varies front 25 to 70 μ. less than length over the same period. The straight-hinge line is 65 to 80 μ, long. The umbo is first for1ned at a length of . 150 to 160 μ. and beco1nes long and broad. Umboned larvae are brown with the shell becoming reddish-brown at the anterior end. However, these typically arcid colors are not as dark as in other species of this family. 'l'he anterior end is more pointed than the posterior in umbo larvae. The hinge consists of a central undifferentiated area with a series of small taxodont teeth at both the anterior and the posterior end of the hinge line in both valves.
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1966
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Biological Sciences Peer-Reviewed Articles
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Virginia Institute of Marine Science