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CaRMS taxon detailsPseudo-nitzschia obtusa (Hasle) Hasle & Lundholm, 2005
531455 (urn:lsid:marinespecies.org:taxname:531455)
accepted
Species
marine,
recent only
(of Nitzschia seriata f. obtusa Hasle, 1965) Hasle, G.R. (1974). Validation of the names of some marine planktonic species of Nitzschia (Bacillariophyceae). Taxon, 23(2/3): 425-428
page(s): p. 427 [details] (of Nitzschia seriata f. obtusa Hasle, 1965) Hasle, G.R. (1965). Nitzschia and Fragilariopsis species studied in the light and electron microscope. II. The group Pseudonitzschia. Skrifter utgitt av Det Norske Videnskaps-Akademi i Oslo, Matematisk-naturvidenskapelig klasse, Ny Ser.,, 18: 45 pp., 17 pls page(s): p. 10; pl. 3, fig. 8, 9, 11, pl. 4, fig. 5-7 [details]
Distribution A cold-water species, so far restricted to the Northern hemisphere
Distribution A cold-water species, so far restricted to the Northern hemisphere [details]
Kociolek, J.P.; Blanco, S.; Coste, M.; Ector, L.; Liu, Y.; Karthick, B.; Kulikovskiy, M.; Lundholm, N.; Ludwig, T.; Potapova, M.; Rimet, F.; Sabbe, K.; Sala, S.; Sar, E.; Taylor, J.; Van de Vijver, B.; Wetzel, C.E.; Williams, D.M.; Witkowski, A.; Witkowski, J. (2024). DiatomBase. Pseudo-nitzschia obtusa (Hasle) Hasle & Lundholm, 2005. Accessed through: Nozères, C., Kennedy, M.K. (Eds.) (2024) Canadian Register of Marine Species at: https://marinespecies.org/carms/aphia.php?p=taxdetails&id=531455 on 2024-04-23
Nozères, C., Kennedy, M.K. (Eds.) (2024). Canadian Register of Marine Species. Pseudo-nitzschia obtusa (Hasle) Hasle & Lundholm, 2005. Accessed at: https://marinespecies.org/carms/aphia.php?p=taxdetails&id=531455 on 2024-04-23
Date action by
original description
(of Nitzschia seriata f. obtusa Hasle, 1965) Hasle, G.R. (1974). Validation of the names of some marine planktonic species of Nitzschia (Bacillariophyceae). Taxon, 23(2/3): 425-428
page(s): p. 427 [details] original description (of Nitzschia seriata f. obtusa Hasle, 1965) Hasle, G.R. (1965). Nitzschia and Fragilariopsis species studied in the light and electron microscope. II. The group Pseudonitzschia. Skrifter utgitt av Det Norske Videnskaps-Akademi i Oslo, Matematisk-naturvidenskapelig klasse, Ny Ser.,, 18: 45 pp., 17 pls page(s): p. 10; pl. 3, fig. 8, 9, 11, pl. 4, fig. 5-7 [details] basis of record Fourtanier, E. & Kociolek, J. P. (compilers). (2011). Catalogue of Diatom Names. California Academy of Sciences, On-line Version. Updated 2011-09-19., available online at http://researcharchive.calacademy.org/research/diatoms/names/index.asp [details] new combination reference Hasle, G. R.; Lundholm, N. (2005). Pseudo-nitzschia seriata f. obtusa (Bacillariophyceae) raised in rank based on morphological, phylogenetic and distributional data. <em>Phycologia.</em> 44(6): 608-619. note: P. obtusa raised in rank from P. seriata f. obtusa. The taxon was originally described in Hasle (1965) and Hasle (1993) [details]  Present Inaccurate Introduced: alien Containing type locality
From regional or thematic species database
Distribution A cold-water species, so far restricted to the Northern hemisphere [details]Harmful effect The species has been shown to produce domoic acid (0.167-0.332 pg per cell) in cultures from Greenland. The production was triggered when exposed to grazing copepods, (Hardardottir et al. 2015) [details] Identification requires electron microscopy. The main characteristics of P. obtusa are the asymmetric valve and the 2 rows of poroids. P. obtusa is phylogenetically and morphologically closely related to P. seriata and P. australis, two other species with asymmetric valves. The main differences are the number of poroid rows in the striae, poroid density, and valve width. P. obtusa: 2 rows - 6-8 poroids/µm - 2.9-5.0µm P. seriata:: (2)-4 rows - 6-9 poroids/µm - 4.6-8.0µm P. australis:: 2 rows - 4-5 poroids/µm - 6.5-8.0µm Verified sequences of ITS rDNA (ITS1, 5.8S, ITS2) are: P. obtusa (DQ062667); P. seriata (DQ062663); P. australis (DQ062661) [details] Toxicology The species has been shown to produce domoic acid (0.167-0.332 pg per cell) in cultures from Greenland. The production was triggered when exposed to grazing copepods, (Hardardottir et al. 2015) [details] |