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The morphology of the foregut of the Say's mud crab Dyspanopeus sayi was described in adults and larvae. The ossicle system was illustrated based on a staining method with Alizarin-Red. The gastric teeth and cardio-pyloric valve were dissected and examined using optical and scanning electron microscopy. In the adults, the morphology of ossicles and gastric teeth of D. sayi is very similar to the related...
Marine mites belonging to the family Halacaridae were found associated with adult females of the spider crabs Maja brachydactyla Balss, 1922 and M. squinado (Herbst, 1788) held under laboratory conditions. Morphological study of collected samples identified the mites as Copidognathus stevcici Bartsch, 1976. C. stevcici was found on pleopods of ovigerous and post-ovigerous females in both crab species,...
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