OBSERVATIONAL CONSTRAINTS ON THE SENSITIVITY OF TWO CALVING GLACIERS TO EXTERNAL FORCINGS



Ultrastructure and functional morphology of the appendages in the reef-building sedentary polychaete Sabellaria alveolata (Annelida, Sedentaria, Sabellida)

Abstract Background The sedentary polychaete Sabellaria alveolata, the sandcastle or honeycomb worm, possesses four different kinds of appendages besides the parapodia: opercular papillae, tentacular filaments, palps, and branchiae.It exhibits a highly specialized anterior end, the operculum, formed by the prostomium, peristomium, and two anterior

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