Chaetoceros decipiens Cleve 1873

• Main Authors: Li, Yang, Boonprakob, Atchaneey, Gaonkar, Chetan C., Kooistra, Wiebe H. C. F., Lange, Carina B., Hernández-Becerril, David, Chen, Zuoyi, Moestrup, Øjvind, Lundholm, Nina
• Format: Other/Unknown Material
• Language: unknown
• Published: Zenodo 2017
• Subjects: Biodiversity; Taxonomy; Chromista; Ochrophyta; Bacillariophyceae; Chaetocerotales; Chaetocerotaceae; Chaetoceros; Chaetoceros decipiens; Norwegian Sea; Fries; Davis Strait; North Atlantic
• Online Access: https://doi.org/10.5281/zenodo.12630658; http://treatment.plazi.org/id/E87C87F48360FFC2FDE67F93AFD3FC9B

Chaetoceros decipiens Cleve 1873, p. 11, Pl. I, fig 5a & 5b, emend. Li, Boonprakob, Moestrup & Lundholm Figs 1– 3, 20E and 20F and S 1 and S 2 Figs. Synonym: Chaetoceros grunowii Schütt 1895 Lectotype designated here. A holotype was not chosen by Cleve. We have chosen slide MIC 5366 in P. T. Cleve’s collection, Stockholm, Sweden as the lectotype. The slide is labelled “Atlanten ytan 27/5-71 Lat 60˚25 Long 19˚50 ThM Fries”. Figs 1A, 1B and 2A illustrate the lectotype. Examination of the type material revealed the morphology to be in agreement with Cleve’s description and with our strains identified as C . decipiens . The Cleve material from the North Atlantic and the Davis Strait looked similar. Most prominently some sibling setae were found to fuse for a longer distance; however, in others no fusion was seen. A very delicate striation of the setae was observed, in agreement with Cleve [7]. We did not at first observe the striation in our cultured material, but a closer examination showed a similar and extremely delicate striation. Type locality: North Atlantic 60˚25’N 19˚50’W Epitype designated here: Glutaraldehyde-fixed material of strain P10E5 isolated from the Norwegian Sea (67,9050N, 4.3238W). The material has been deposited at the Natural History Museum of Denmark, Copenhagen (C-A-92068). Fig 1C and 1D illustrate the epitype. A sequence of D1-D3 LSU rDNA represents the epitype (Genbank accession number KX065223). Emended description: Chains are usually straight, sometimes slightly arc-shaped curved (Fig 1A, 1C, 1E and 1F). In broad girdle view, the cells are quadrangular or rectangular (Fig 1A, 1B and 1D–1G) sometimes with the apical axis longer than the pervalvar axis (Fig 1F), sometimes the reverse (Fig 1B, 1D, 1E and 1G). Solitary cells also occur (Fig 3A). Several (3– 12) chloroplasts are present in each cell (Fig 1E and 1F). In valve view, valves are broadly elliptical to round-oval; the valve face is saddle-shaped (Figs 2F and 3B), the central region slightly raised and higher than the valve ...