Revision of Apodopsyllus (Copepoda, Harpacticoida), including Two New Species and a Redescription

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Abstract
The genus Apodopsullus, commonly found interstitially in fine sands, is split into 2 spp. groups, separated primarily on the structure of the 1st leg. In the A. "littoralis group (10 spp.) [A. adaptus, A. africanus, A. arenicolus, A. bermudensis sp. nov., A. camptus, A. depressus, A. tittoralis, A. schultzi, A. spinipes and A. vermicularis] the exopod and endopod are of about equal length; in the A. "madrasensis group (2 spp.) [A. madrasensis and A. anguiformis sp. nov.] the endopod is at least 21/2 times as long as the exopod. A. unguiformis belongs to the A. madrasensis group and differs from the other known species in the group in P5 shape and setation. A bermudensis belongs to the A littoralis group and differs from its congeners in P5 shape and setation and from the most closely allied species in A1 and A2 segmentation. A. vermiculiformis Lang differs in some details from Lang''s description and figures and may be somewhat variable in A2 exopod segmentation. A. reductus (Petkovski) is considered incertae sedis. A key to all known species is presented.

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