Spirogyra Link

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

15. Spirogyra Link

( Fig. 5A–G )

Zygospore ellipsoid to oblong, hyaline, cell wall with a coarse and irregular reticulum. Some with a well-developed fine membrane covering the entire zygospore. Long axis ca. 83–161 µm (x 156 µm), short axis ca. 35–90 µm (x 85 µm). Ecological data: Spirogyra has a cosmopolitan distribution in freshwater ( Bicudo & Menezes, 2006), growing at temperatures above 20 ºC ( Van Geel & Van der Hammen, 1978; Dias, 1983).

Figures

Figure 5. Algae. A–G. Spirogyra Link, A, B: 1º–2º pl, C, D: 1º–2º pl (with membrane covering the zygospore), E, G: 1º–3º pl. Acritarchs. H–J.Cymathiosphaera O. Wetzel emend. Deflandre type: 1º–3º pl; K–M.Michrystridium Deflandre emend.Sarjeant type: 1º–3º pl (pl planes).