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  • Bruno Vellutini 15:50 on 2012/03/27 Permalink
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    Nemerteans supposedly Lineus ruber layed egg cases today… 

    Nemerteans (supposedly Lineus ruber) layed egg cases today. Transparent sheaths are elongated containing bundles of eggs covered by a iridescent membrane. Eggs are yolky and yellowish (size?); bundles have around 15 eggs. 1 apparently immature egg case had white eggs with 3 eggs per bundle approximately.

    Case has an external sticky layer followed by a bi-layered cilinder, slightly more opaque. Egg bundles are on the main axis of the cilinder distributed in a bilateral manner.

    I cleaned the egg cases removing dirt from the external layer and put them at 18 °C in clean UV sterile filtered sea water.

     
  • Bruno Vellutini 14:15 on 2012/03/27 Permalink
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    L. ruber egg masses 

    Egg mass is alongated and sometimes curved, reflecting the position of worm body when the eggs were laid. Is transparent and composed of a sticky outer layer, a secondary double layer that is slightly opaque, and an inner mass of jelly running along the axis where the bundles are attached in a bilateral manner. Each bundle contains several embryos, from 3-20, protected by a membrane.

     
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