The cephalic sensory organ in veliger la
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Bernhard Ruthensteiner; Kurt Schaefer
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Article
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2001
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John Wiley and Sons
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English
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## Abstract The apical area of larvae of four primitive pulmonate species was investigated by means of serial ultrathin and light microscope sections. Cephalic sensory organs (CSOs) were found in the larvae of __Onchidium cf. branchiferum__ (Onchidiidae) and __Laemodonta octanfracta__ (Ellobiidae),