Haplozyga armata (Nordstedt) Raciborski var. armata
publication ID |
https://doi.org/ 10.21826/2446-82312020v75e2020010 |
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https://doi.org/10.5281/zenodo.13845207 |
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https://treatment.plazi.org/id/F5215915-FFA1-E224-FF10-F8D320DF5240 |
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Felipe |
scientific name |
Haplozyga armata (Nordstedt) Raciborski var. armata |
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Haplozyga armata (Nordstedt) Raciborski var. armata , Flora, Jena 81: 32, pl. 3-4, fig. 6. 1895.
Basionym: Gymnozyga armata Nordstedt , Acta Universitatis lundensis 3: 1, pl. 1, fig. 1-3. 1889.
( Fig. 15 View Figs )
Cells 2 times greater in length than width, 27-42 × 14-21 μm, 6-10 μm broad at the apex and 14-15 μm broad at the isthmus. Semicells hexagonal; straight to slightly convex lateral margin; apex straight; 1 intumescence ornamented with a ring of robust spines and a small divergent indentation at the base; moderate median constriction; open to acute median sinus; smooth cell wall.
Material examined: BRAZIL, AMAPÁ, Macapá, Curralinho Lake , 02.VI.2007, C.B. Araújo (SP469217), 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: Haplozyga (Nordstedt) Raciborski is a typically tropical genus and includes only two species and one taxonomical variety: Haplozyga armata var. armata (Nordstedt) Raciborski , Haplozyga armata var. raciborskii Förster and Haplozyga eckertii Förster. The species H. armata var. armata was originally described as Bambusina (Gymnozyga) armata Nordstedt by Nordstedt (1889). However, according to Bicudo & Menezes (2017), it was reclassified, in 1985, as Gymnozyga section: Haplozyga . Considering that specimens of Haplozyga are morphologically very distinct from those of Bambusina and of all other desmids genera, it worth maintaining it as a distinct genus until other polyphasic studies using molecular and phylogenetic analyses can confirm its taxonomic classification.
Distribution in Brazil: Goiás (Förster 1966); São Paulo (Förster 1966).
No known copyright restrictions apply. See Agosti, D., Egloff, W., 2009. Taxonomic information exchange and copyright: the Plazi approach. BMC Research Notes 2009, 2:53 for further explanation.
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