
FIGURES 137–142. (Continued) Platessa itoupensis sp. nov., material from French Guiana. SEM. 137–138. External view of the RSV showing the coarse and curved multiseriate striae, the features of the raphe sternum. Hyaline area surrounding the valve. 139. Tilted view of the external RSV, note the weakly thickness of the mantle free from poroids or areolae. 140. Details of external proximal raphe endings surrounded by a groove weakly extended (arrow). 141. Details of external distal raphe ending with circumflex-like extended groove. 142. Inner view of the RSV showing the raphe features, raphe endings deflected to opposite sides. Note the open valvocopula (arrow).
Published as part of Tudesque, Loïc, Cohu, René Le & Wetzel, Carlos E., 2016, Two new Platessa (Bacillariophyceae) from Amazonia: Platessa guianensis spec. nov., and P. itoupensis spec. nov., pp. 237-255 in Phytotaxa 267 (4) on page 247, DOI: 10.11646/phytotaxa.267.4.1, http://zenodo.org/record/13667166
Chromista, Bacillariophyceae, Achnanthaceae, Biodiversity, Bacillariophyta, Platessa, Achnanthales, Taxonomy
Chromista, Bacillariophyceae, Achnanthaceae, Biodiversity, Bacillariophyta, Platessa, Achnanthales, Taxonomy
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