Hyalotheca dissiliens Bréb. ex Ralfs

Hyalotheca dissiliens Bréb. ex Ralfs

( Fig. 3I View FIG )

The British Desmidieae: 51 ( Ralfs 1848).

Conferva dissiliens Dillwyn, British Confervae : pl. 63 ( Dillwyn 1806). — Hyalotheca dissiliens var. tridentula Nordstedt, Lunds Universitets Årsskrift 9 (Afh. II, 10): 48 ( Nordstedt 1873). — Hyalotheca dissiliens var. quadridentula Nordstedt , Hedwigia 15: 12 ( Nordstedt (1876). — Hyalotheca dissiliens var. bidentula (Nordstedt) H.C.Boldt, Bihang til Kongliga Svenska Vetenskaps-Akademiens Handlingar 13 (Afd. III, 5): 43 ( Boldt 1888).

DISTRIBUTION. — Cosmopolitan. Amazon Basin: Grönblad (1945); Scott et al. (1965); Förster (1969); Uherkovich & Schmidt (1974); Uherkovich (1976, 1981); Thomasson (1977); Uherkovich & Rai (1979); Gutiérrez & Cadima (2004); Melo et al. (2005); Souza de et al. (2007); Melo & Souza de (2009); Souza de & Melo (2010); Cadima (2013); Cunha de et al. (2013); Araújo et al. (2020). Western Amazonia (lowlands): Duque & Núñez-Avellaneda (2000); Núñez-Avellaneda (2008); Díaz-Olarte & Duque (2009); Ismiño et al. (2014, 2018).

DESCRIPTION

Cells 16.6-17.3 µm long, 24.9-27.8 µm wide, isthmus 21.6µm, cells 1.5 times longer than wide. Cells with shallow median constriction, median sinus open; cell wall hyaline and smooth; apical view circular. Semicells rectangular, with rounded angles and lateral margins straight.