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- W2039652314 abstract "Summary 1 The commonly accepted view that Chirocephalus feeds chiefly or entirely on minute suspended particles is incorrect. Its chief food consists of detritus. 2 There is also a filter-feeding apparatus which is here described for the first time. 3 The larger food particles consisting of filamentous algæ and the leaves of mosses etc., are not sucked into the median groove, but are pushed in by the endites and pushed towards the mouth by the spines and setæ on the basal endites. The basal endites are thus gnathobasic lobes, which may act in apposition. 4 Water which may be carrying minute suspended particles finds its way into the inter-limb space probably by the 7th endites and exopodites, together forming a series of vortices which converge. Suspended particles which are drawn into the median groove cannot settle there by reason of the increase in the rate of flow, nor is it likely that they could be caught by an existing secretion of mucus. 5 As the limbs move backwards the water at their base is under pressure and enters the median groove after passing through the filter process. 6 The movement of the limbs is irregular and only roughly metachronial. Any account of feeding, swimming, or respiratory process which demands precise co-ordination of the limbs is untenable. 7 The limbs are highly muscular, and both the endites and exites are definitely controlled both during the forward and backward movements. 8 The real action of the limbs is highly complicated, and its complete investigation would involve more mathematical data than are available at the present moment. 9 It is suggested that the chief swimming-limb is the exopodite which, functions as a propeller and not as a paddle or oar. 10 The view taken by Sars that the proepipodites function as covering scales is upheld. They definitely do not function as valves. 11 The view taken by Sars that the primary function of the phyllopod post oral limb is respiratory is upheld. 12 The present habitat of Chirocephalus diaphanus must be entirely different from any which existed in early palæozoic times. Speculations dealing with the phylogeny of Crustacea, based as they must be almost entirely on structure, require considerable caution." @default.
- W2039652314 created "2016-06-24" @default.
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- W2039652314 date "1933-12-01" @default.
- W2039652314 modified "2023-09-26" @default.
- W2039652314 title "The Feeding Mechanism of Chirocephalus diaphanus Prévost, the Fairy Shrimp" @default.
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- W2039652314 doi "https://doi.org/10.1111/j.1096-3642.1933.tb01641.x" @default.
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