Euastrum groenbladii A.M. Scott & H. Croasdale

Costa, Fabiana De Matos, Ramos, Geraldo José Peixoto, Oliveira, Ivaniabatista, Bicudo, Carlos Eduardo De Mattos & Moura, Carlos Wallace Do Nascimento, 2018, Five new taxa and a new record of Euastrum (Desmidiaceae) from the Chapada Diamantina region, Bahia State, Brazil, Phytotaxa 372 (3), pp. 193-202 : 197

publication ID

https://doi.org/ 10.11646/phytotaxa.372.3.2

DOI

https://doi.org/10.5281/zenodo.13727563

persistent identifier

https://treatment.plazi.org/id/07381B26-BC3A-FF8A-FF33-FB97E2F6F3B6

treatment provided by

Felipe

scientific name

Euastrum groenbladii A.M. Scott & H. Croasdale
status

 

Euastrum groenbladii A.M. Scott & H. Croasdale in Scott et al. ( Figs. 10–14 View FIGURES 2–14 )

Cells dimensions: 33– 33.9 μm long, 22.1–23 μm wide, polar lobe 12–12.5 μm wide, isthmus 7–8 μm wide.

Material examined: BRAZIL. Bahia: Andaraí, Collected at “Marimbus do Baiano”, Pantanal dos Marimbus (Baiano Lagoon), 12° 45’ 54.2”S, 41° 18’ 41.2”W. Sample collected by F. M. Costa, G. J. P. Ramos & C. W. N. Moura. ( HUEFS 241814, HUEFS 241815, HUEFS 241799).

Habitat: Periphyton; conductivity 0.08 (± 0.01 mS. cm-1); dissolved oxygen 8.2 (± 2.3 mg.L- 1); pH 7.1 (± 0.5); total dissolved solids 0.03 (± 0.01 ppt); water temperature 27.5 (± 0.6 ºC); water transparency 0.52 (± 0.20 m).

Geographic distribution in Brazil: Amazonas ( Scott et al. 1965).

Notes: — Euastrum groenbladii is morphologically similar to E. biocellatum Scott & Croasdale (1965: 31) , although the latter differs by having a retuse incision between the basal and apical lobes, two scrobicles and by not having a line of supra-isthmus granules ( Scott & Croasdale 1965: fig. 52).

All of the morphological characteristics observed using SEM were also observed under LM. Variations were observed in terms of the basal lobes (rounded to slightly truncate) and the apical incision (shallow to deep).

When compared the morphological features reported by Scott et al. (1965:33) with those from Bahia, the only difference is the number of scrobicles: the semicells from Amazonas has one scrobicle (fig. 62), whereas the Bahia specimens always have two scrobicles. Overall, Euastrum groenbladii is a rare species and the present record is the first for northeastern Brazil.

F

Field Museum of Natural History, Botany Department

M

Botanische Staatssammlung München

G

Conservatoire et Jardin botaniques de la Ville de Genève

J

University of the Witwatersrand

P

Museum National d' Histoire Naturelle, Paris (MNHN) - Vascular Plants

C

University of Copenhagen

W

Naturhistorisches Museum Wien

N

Nanjing University

HUEFS

Universidade Estadual de Feira de Santana

LM

Secçáo de Botânica e Ecologia

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