Rhoicosphenula Lange-Bert., Kociolek, A.A.Saber & Cantonati, 2021

Saber, Abdullah A., Angeli, Nicola, Lange-Bertalot, Horst, Kociolek, John P., Spitale, Daniel, Charles, Donald F. & Cantonati, Marco, 2021, Rise of subgen. Rhoicosphenula Lange-Bert. to the genus level, and description of a new Gomphosphenia s. s. species from Puerto Rico, Cryptogamie, Algologie 20 (13), pp. 217-229 : 221

publication ID

https://doi.org/ 10.5252/cryptogamie-algologie2021v42a13

DOI

https://doi.org/10.5281/zenodo.7819269

persistent identifier

https://treatment.plazi.org/id/FA5FD005-FFFB-DB1F-FEE8-6583FAE0FA24

treatment provided by

Felipe

scientific name

Rhoicosphenula Lange-Bert., Kociolek, A.A.Saber & Cantonati
status

stat. nov.

Rhoicosphenula Lange-Bert., Kociolek, A.A.Saber & Cantonati , stat. nov.

( Figs 2 View FIG , 3 View FIG )

Rhoicosphenula Lange-Bert. Nova Hedwigia 60: 244 (1995).

Cells solitary, not forming colonies or aggregates, growing as epiphytes on small mucilaginous stalks. Frustules almost rectangular in girdle view, sometimes appearing slightly broadly wedge-shaped ( Fig. 2 View FIG G-I). Pseudosepta present on both poles of the valves. Raphe branches straight, with large, well-separated proximal ends ( Fig. 2 View FIG A-F), and with T-shaped distal fissures ( Fig. 3A View FIG ). Internal fissures extend onto the central nodule, with short and very faintly bent proximal ends ( Fig. 3C, H View FIG ). Foramina of the areolae simple, more or less slit-shaped, forming two systems, one on the valve face and one on the mantle, respectively, separated by a hyaline mantle margin ( Fig. 3A, B View FIG ). Areolae are covered internally by flat hymenes (similar to those of Brachysira ), developing from the sternum to the mantle without any visible interruption ( Fig. 3F, G View FIG ). The cingulum composed of six unilaterally open bands ( Fig. 3B View FIG ), including the valvocopula and first copula (each with a septum at one of the poles), as well as the four further copulae ( Fig. 3C, D View FIG ).

REGISTRATION. — http://phycobank.org/102718

New combinations within Rhoicosphenula stat. nov.:

Kingdom

Chromista

Phylum

Ochrophyta

Class

Bacillariophyceae

Order

Cymbellales

Family

Rhoicospheniaceae

Loc

Rhoicosphenula Lange-Bert., Kociolek, A.A.Saber & Cantonati

Saber, Abdullah A., Angeli, Nicola, Lange-Bertalot, Horst, Kociolek, John P., Spitale, Daniel, Charles, Donald F. & Cantonati, Marco 2021
2021
Loc

Rhoicosphenula Lange-Bert.

Lange-Bert., Kociolek, A. A. Saber & Cantonati 1995: 244
1995
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