Euastrum dubium Nägeli

Adam, Chaidir, Kenins, Alex & Prabowo, Danang A., 2025, Diversity and new records of desmids (Zygnematophyceae, Charophyta) in Central Kalimantan, Indonesia, Phytotaxa 691 (2), pp. 125-150 : 140

Euastrum dubium Nägeli

Coesel & Meesters 2007, p. 77, pl. 47, fig. 18.

Fig. 6h

Comments: While we are confident of our designation at the species level, we were unable to determine what varitey the encountered specimens are. Coesel & Meesters (2007) rated this species as meso-oligotrphic and Croasdale & Flint (1986) noted that it was found in waters that tend to be acidic (preferring Sphagnum ) but also broader pH range of circumneutral.

Distribution: This species and its many varieties are widespread and have been previously reported from southeast Asia, including Kalimantan (Borneo).

Figures

FIGURE 6. Euastridium: (A) E. staurastroides Carter. Euastrum: (b) E. binale var. curtum (West & G.S.West) Willi Krieger, (c) E. denticulatum F.Gay 1884, (d) E. cf. didelta Ralfs complex, (e) E. didelta var. capitatum (Scott & Prescott) O.V.Anissimova & Guiry, (f) E. didelta var. dideltoides (Willi Krieger) O.V. Anissimova & Guiry, (g) E. dideltoides (Raciborski) West & G.S. West, (h) E. dubium Nägeli, (i) E. neosinuosum O.V.Anissimova & Guiry, (j) E. longicolle var. magnaporum A.M.Scott & Prescott, (k) E. cf. pulchellum Brébisson, (l) E. serratum Joshua, (m) E. sublobatum var. sumatranum A.M.Scott & Prescott, (n) E. turgidum Wallich.