Morphology of Biddulphia seychellensis (Grunow in Van Heurck) FW Mills and the generic limits of Biddulphia Gray

作者：Dabek Przemyslaw^*; Witkowski Jakub; Witkowski Andrzej; Riaux Gobin Catherine

来源：Nova Hedwigia, 2015, 97-105.

DOI：10.1127/nova_suppl/2015/0031

• Biddulphia seychellensis
• ecology
• Indian Ocean
• marine intertidal diatoms
• morphology
• Scatterred Islands
• west coast of South Africa

In this paper presented are the results of light and electron microscopic studies on a marine diatom species Biddulphia seychellensis. The species turned out to be abundant in some samples from the west coast of South Africa and from the western Indian Ocean coral reefs of Scattered Islands (Eparses). Unlike most representatives of the genus, B. seychellensis forms tripolar to square valves, but smallest specimens can be almost circular. The species shares a few features with the generitype, e.g., pseudocelli, few rimoportulae, areolae occluded with cribra and occasional simple pores. Unlike in the generitype, however, the valve face in B. seychellensis is always flat, pseudocelli indistinct and never raised above the valve level, valvocopula is open, and the marginal ridge is missing. Biddulphia seychellensis has been abundantly observed in warm oceanic waters with somewhat increased salinity. In addition data on the distribution in marine littoral are provided.

• 出版日期2015