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Original Articles

GOMPHONEMA ZAIRENSE SP. NOV. FROM THE TSHOPO WATERFALLS (KISANGANI, ZAIRE)

Pages 31-37 | Published online: 31 Oct 2011
 

Abstract

Gomphonema zairense Compère, sp. nov. is formally described from wet rocks, sprayed by water under the waterfalls of the Tshopo river in Kisangani (Zaire). This new species is characterized by striae formed of double rows of puncta, unoccluded areolae and a slit-like internal opening of the stigma. It shares these characters with G. intermedium Hust., G. blandiculum Kociolek & Stoermer and some other species with which it forms a well characterized group occupying a more or less intermediate position between Gomphonema and Gomphoneis.

Une nouvelle espèce, Gomphonema zairense Compère est décrite formellement; elle provient de rochers humides sous les embruns des chutes de la Tshopo à Kisangani (Zaïre). Cette nouvelle espèce se caractérise par les stries formées de doubles rangées d'aréoles, par les aréoles ouvertes extérieurement et par le stigma s'ouvrant par une fente du côté interne du nodule central. Elle partage ces caractères avcc G. intermedium Hust., G. blandiculum Kociolek & Stoermer et quelques autres espèces avec lesquelles elle forme un groupe bien caractérisé, plus ou moins intcrmédiaire entre Gomphonema et Gomphoneis.

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