Prodissoconch morphology of the relict marine paleoheterodont Neotrigonia margaritacea (Mollusca: Bivalvia) indicates a non-planktotrophic prejuvenile ontogeny
Published online by Cambridge University Press: 01 February 2000
Trigonioids represent the most plausible marine outgroup for freshwater palaeoheterodonts, yet details of their early ontogeny are scant. We utilized museum specimens and scanning electron microscopy to characterize the prodissoconch structure of the ‘living fossil’ Neotrigonia margaritacea. This species produces a large inflated prejuvenile shell (mean length ±SD=664±16.9 μm, N=8) that lacks both an umbone and a prodissoconch II. It is concluded that N. margaritacea does not rely on planktotrophy to fuel its prejuvenile ontogeny.
- Brief Report
- Journal of the Marine Biological Association of the United Kingdom , Volume 80 , Issue 1 , February 2000 , pp. 173 - 174
- © 2000 Marine Biological Association of the United Kingdom