Transeauina Guiry

Hilgert-Moreira, Suzane Both & Lorscheitter, Maria Luisa, 2025, Identification of palynomorphs sampled from a sedimentary profile of the last 5000 years in Lagoa dos Patos, Rio Grande do Sul, southern Brazil., Acta Botanica Brasilica (e 20240187) 39, pp. 1-15 : 7

13. Transeauina Guiry

(Fig. 4E–G)

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).