Bambusina borreri (Ralfs) Cleve var. borreri

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 : 4

Bambusina borreri (Ralfs) Cleve var. borreri , Öfversigt af Kongliga Vetenskaps-Akademiens Förhandlingar 20:496. 1864.

Desmidium borreri Ralfs , The British Desmidieae. 58, pl. 3. 1848.

( Figs. 3 A-C)

Cells 1-2 times greater in length than width, 15-43 × 13-22 μm, 8-14 μm broad at the apex and 12-22 μm wide at the isthmus. Semicells pyramidal-truncated and barrel-shaped; parallel lateral margins, narrow towards the apex; broad and truncated apex; small basal inflation on either side of the isthmus; open median constriction; shallow median sinus; 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), 15.IV.2008, C.B. Araújo (SP469226), 13.V.2008, C.B. Araújo (SP469227), 15.VII.2008, C.B. Araújo (SP469228) .

Comments: the present specimens did not show the longitudinal striation at the apex of semicells. Ralfs (1848) identified this species as Desmidium borreri Ralfs. However , in 1845, the same species was identified as Bambusina brebissonii Kützing by Kützing (1845), and it was validated by the same author in Kützing 1849. Cleve (1864) clarified that Bambusina borreri , based on Ralfs’ material, was synonymous to B. brebissonii . Gontcharov (2008) designated Bambusina borreri as the type species of Bambusina . However, according to Guiry (2013), this was incorrect because B. brebissonii Kützing ex Kützing was included in its original publication as a heterotypic synonym of B. borreri . Due to this, according to the latter author, B. brebissonii must be considered the type species of Bambusina and a ‘nomen conservadum’ for Gymozyga Ehremberg ex Kützing. D. borreri should be considered as a basionym and B. borreri as a synonym for B. brebissonii .

Distribution in Brazil: Amazonas ( Thomasson 1955, Förster 1974, Martins 1980, Souza & Melo 2010); Bahia (Förster 1964, Martins & Bicudo 1987, Bicudo & Martins 1989, Oliveira et al. 2010); Goiás ( Dias & Sophia 1994); Mato Grosso ( De-Lamonica-Freire 1992, Camargo et al. 2009); Pará ( Grönblad 1945, Scott et al. 1965, Förster 1969); Paraná (Bittencourt-Oliveira 1993b); Rio Grande do Sul ( Rosa et al. 1987, Rosa et al. 1988, Burliga et al. 2016); São Paulo ( Bicudo 1969, Bicudo & Samanez 1984, 2016, Taniguchi et al. 1998); Tocantins ( Dias & Sophia 1994); Federal District ( Leite & Senna 1992).

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.