<abstract xmlns="http://www.w3.org/1999/xhtml">

<p><italic>Cocconeis subantarctica</italic> sp. nov., a small monoraphid marine diatom, previously described as <italic>C. scutellum</italic> cf. var. <italic>parva</italic> Grunow, is reported from the Kerguelen Archipelago. Based on the careful re-examination of the material using SEM (scanning electron microscopy), both valves and the cingulum were described, which enabled a better classification of this small Subantarctic taxon. The shape of the frustule is widely rounded to subdiscoid, with uniseriate and radiate striae on both valves. The SV (sternum valve) areolae have rota-like hymenate pore occlusions, with larger marginal areolae separated by a hyaline rim. The RV (raphe valve) areolae are more complex than those of the SV, with several reniform concentric hymenate occlusions. This taxon has no real stauros, only one virga, which is larger on one side of each valve. The species is not a member of the <italic>Cocconeis scutellum</italic> ‘complex’, but is closely related to <italic>C. stauroneiformis</italic> despite several morphological differences.</p>
</abstract>

Cocconeis subantarctica sp. nov., a small monoraphid marine diatom, previously described as C. scutellum cf. var. parva Grunow, is reported from the Kerguelen Archipelago. Based on the careful re-examination of the material using SEM (scanning electron microscopy), both valves and the cingulum were described, which enabled a better classification of this small Subantarctic taxon. The shape of the frustule is widely rounded to subdiscoid, with uniseriate and radiate striae on both valves. The SV (sternum valve) areolae have rota-like hymenate pore occlusions, with larger marginal areolae separated by a hyaline rim. The RV (raphe valve) areolae are more complex than those of the SV, with several reniform concentric hymenate occlusions. This taxon has no real stauros, only one virga, which is larger on one side of each valve. The species is not a member of the Cocconeis scutellum ‘complex’, but is closely related to C. stauroneiformis despite several morphological differences.

<italic>Cocconeis subantarctica</italic> sp. nov. from Kerguelen Archipelago (Austral Ocean) and comparison with <italic>Cocconeis stauroneiformis</italic> (W.Smith) Okuno

Oceanological and Hydrobiological Studies

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

 sp. nov. from Kerguelen Archipelago (Austral Ocean) and comparison with  (W.Smith) Okuno

Cocconeis subantarctica sp. nov., a small monoraphid marine diatom, previously described as C. scutellum cf. var. parva Grunow, is reported from the Kerguelen...

Cocconeis subantarctica sp. nov. from Kerguelen Archipelago (Austral Ocean) and comparison with Cocconeis stauroneiformis (W.Smith) Okuno

Article Category: Original research paper

Online veröffentlicht: 27. Sept. 2017

Seitenbereich: 350 - 362

Eingereicht: 28. Jan. 2017

Akzeptiert: 23. März 2017

DOI: https://doi.org/10.1515/ohs-2017-0036

© 2017 Faculty of Oceanography and Geography, University of Gdańsk, Poland. All rights reserved

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.