Proximal raphe

The portion of a raphe branch near the central nodule of a valve. The proximal raphe ends border the central nodule of a valve. See also distal raphe.

Proximal Raphe
Image Credit: Sarah Spaulding
Scanning electron micrograph of a species of Gomphonema. The arrows show the external proximal raphe ends. This raphe is straight - it is not deflected or dilated.
Amphora Proximal Raphe
Image Credit: Josh Stepanek
Light micrograph of a species of Amphora. The arrows show the proximal raphe ends, which are dorsally deflected.
Muelleria Proximal
Image Credit: Sarah Spaulding
Scanning electron micrograph showing the external proximal raphe ends in the genus Muelleria. The ends are unilaterally deflected, or bent, to the same side of the valve.