Transeauina Guiry

13. Transeauina Guiry View in CoL

( Fig. 4E–G View Figure 4 )

Zygospore circular to elliptical in polar view, hyaline, composed of two symmetrical halves. Each half divided into polar and equatorial zones by a low circumpolar (orbicular to oblong) ridge encircling the pole; irregular sculpturing in the center of the polar zone; equatorial zone of each half radially striate. Polar diameter ca. 23–32 µm (x26µm),equatorial diameter ca. 27–45µm(x39µm). Only one-half typically found in sediment. In algae, the name Debarya Wittrock is illegitimate for this genus and is currently regarded as a synonym of Transeauina Guiry in the phycological literature ( Guiry, 2013; Roth & Lorscheitter, 2016). Ecological data: Transeauina is found in clean, shallow, stagnant, more or less mesotrophic freshwater lakes ( Van Geel & Van der Hammen, 1978; AlgaeBase, 2024).