Groenbladia neglecta (Raciborski) Teiling var. neglecta

Araújo, Camila Barbosa de, Bicudo, Carlos Eduardo de Mattos, Takiyama, Luís Roberto & Melo, Sérgio de, 2020, Pseudofilamentous desmids (Zygnematophyceae) from an Amazonian floodplain lake (Macapá, AP, Brazil), Iheringia, Série Botânica (e 2020010) 75, pp. 1-14 : 7

Groenbladia neglecta (Raciborski) Teiling var. neglecta , BotaniskaNotiser 1952(3): 276. 1952.

Hyalotheca neglecta Raciborski , Flora, Jena 8(1): 30, pl. 3, fig. 2-3. 1895.

( Figs. 13 A-B)

Cells 3-3.6 times greater in length than width, 33-45 × 10-12 μm, 8-10 μm broad at the apex. Semicells cylindrical; truncated apical margins; parallel lateral margins; subquadrate angles; almost imperceptible median constriction; hyaline cell wall; axial chloroplast.

Material examined: BRAZIL, AMAPÁ, Macapá, Curralinho Lake , 02.VI.2007, C.B. Araújo (SP469217), 03.VII.2007, C.B. Araújo (SP469218), 14.I.2008, C.B. Araújo (SP469223), 12.II.2008, C.B. Araújo (SP469224), 26.III.2008, C.B. Araújo (SP469225), 15.IV.2008, C.B. Araújo (SP469226), 13.V.2008, C.B. Araújo (SP469227) .

Comments: the characteristic features of this species are: semicells cylindrical with truncated apical margins and parallel lateral margins, with subquadrate angles and an almost imperceptible median constriction.

Distribution in Brazil: Amazonas (Förster 1974, Souza & Melo 2010); Bahia ( Oliveira 2011); Pará ( Scott et al. 1965).

Figures

Figs. 3-15. Pseudofilamentous desmids of Curralinho Lake, Macapá, Amapá, Brazil. 3 A-C. Bambusina borreri. A, B. detailed cells; C. detailed pseudofilament; 4. B. borreri var. brasiliensis; 5 A-B. B. borreri var. majus, detailed cells and pseudofilaments; 6. Desmidium baileyi var. baileyi f. bailey; 7 A-B. D. elegans. A. detailed pseudofilament, B. detailed cell; 8 A-B. D. graciliceps var. graciliceps. A. frontal view of the pseudofilament, B. slight modification of the pseudofilament frontal view; 9. D. graciliceps var. groenbladii; 10 A-C. D. longatum. A. pseudofilament frontal view, B. formation of the elongate conjugation tube, C. zygospore; 11 A-B. D. quadratum var. quadratum. A. detailed pseudofilament, B. detailed cells; 12. D. quadratum var. constrictum; 13 A-B. Groenbladia neglecta var. neglecta. A. detailed pseudofilament, B. detailed cells; 14 A-B. G. neglecta var. elongata. A. detailed pseudofilament, B. detailed cells; 15. Haplozyga armata var. armata. Scale bars = 10 µm.