Browsing by Author "Day, Jennifer Ann"

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    Southern African Cumacea- Volume 2
    (1978) Day, Jennifer Ann
    The genera Gynodiastylis, Dicoides, Allodiastylis, Sheardia, Ziiiimeriana, and Hali ana gen. nov. are removed from the ui as tyl id ae and pl aced in the reinstated family Gynodi astyl i dae Stebbing, 1912. The farnily is confined to sha 11 ow waters of the Indo-west·-Paci fi c Region. In southern Africa the Gynodiastylidae are represented by seven species in three genera. One of the genera (Haliana) is new, and so are all of the species, Haliana eckloniae, Dicoides siphonatus, Gynodiastylis sulcatus, G. curvirostris, G. profundus, G. lineatus and G. fulgidus. All are described and figured. The southern African Diastylidae are represented by seventeen species in six genera. Two further species are known from the Cape Basin. Sixteen species are described and figured. Vemakylindrus is raised from subgeneric to' generic status and the genus Adiastylis is reinstated to accommodate many species intermediate between Makrokyl i ndrus and Diastyl is. TvJe l ve species are new, namely Die formosae, D. platytelson, Vemakylindrus stebbingi, Makrokylindrus spinifer, M. deinotelson, M. mundus, M. bicornis, Adiastylis aculeatus, Diastylis namibiae, Leptostylis gilli, L. attenuatusand L. faurei. Keys are given to the southern African Gynodiastylidae and Diastylidae, the genera of the two families, Dicoides, the species of Gynodiastylis described since 1946, Die, Vemakylindrus, Makrokylindrus, Adiastylis and the species of Diastylis and Leptostylis from the southern hemisphere. The distribution of the Diastylidae is discussed; the family appears to predominate in temperate latitudes and occurs widely at all depths below the intertidal zone. Although the southern African Diastylidae are mainly deep-water forms, there are a few very successful shallow-water species, including Diastylis algoae, which is the most abundant of all local cumaceans, as well as accounting for more than 75% of the individuals of diastylid from southern Africa. The species diversity is low and the rate of endemism appears to be 100%.
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    Southern African Cumacea: Volume-1
    (1978) Day, Jennifer Ann; Day, Jenny
    Several thousand cumacear.s have been examined from over six hundred benthic samples collected around the coast of southern Africa (south of 20°s). The taxonomy of the families Bodotriidae, Lampropidae, Ceratocumatidae, ·Gynodiastylidae and Diastylidae has been studied in detail and papers on the southern African representatives of the first three families have been published in the Annals of the South African Museum. In. the five families studied, seventy-five species are known in southern Afric~n waters and forty-five of these are here presented as new. There are four new genera (Alticuma, Austrocuma, Mossambicuma and Haliana). A group of six genera, Allodiastylis, Zimmeriana, Sheardia, Dicoides, Gynodiastylis and Haliana, is removed from the Diastylidae and returned to the previously rejected family Gynodiastylidae Stebbing, 1912. · A complf!te synonymy is given for each species, together with a list of / previous records and data on type material where this is available. All species examined by the author are described and figured. The abundance of Iphinoe stebbingi in False Bay. is positively correlated with depth~ particle size and organic content of the substrate, while the abundance of Diastylis algoae correlates only with depth. These results are discussed in ·relation to the biology of the two species.