Psammosa N.Okamoto, A.Horák & P.J.Keeling, 2012
Holotype species: Psammosa pacifica N.Okamoto, A.Horák & Keeling
Original publication and holotype designation: Okamoto, N., Horák, A. & Keeling, P.J. (2012). Description of two species of early branching dinoflagellates, Psammosa pacifica n. g., n. sp. and P. atlantica n. sp.. PLoS ONE 7(6): 1-6 .
Request PDFDescription: The cell is biflagellate, dorsoventrally compressed barley shape with the round anterior end and acute posterior end, with a kink on the left ventral contour. It has a subapical diagonal ridge on the ventral face dividing anterior-left section and posterior-right section of the cell. The ventral side of the anterior-left section is concave towards the margin to make a wide groove on the right side of the ridge, where the anterior flagellum is inserted. The posterior-right section has a longitudinal depression in the middle, where the posterior flagellum is inserted. The cell is devoid of body scale. Both flagella bear two dimensional scales and mastigonemes. The cell contains a refractile body in the posterior section. The cell is colorless and devoid of any visible evidence of plastid. The cell proliferates by binary fission along the transverse plane at the margin of the anterior-left section and posterior-right section where the anterior flagellum emerge. The cell often rests on the bottom surface with the periodically beating posterior flagellum. The cell swim with rotation in the water column; while on the bottom surface, it swims in a tight circle pivoting around the cell apex without rotation. Both the anterior and the posterior flagella bears simple mastigonemes and two dimensional cobweb-shape flagellar scales.
Origin of description: this description is from the original publication; it may have been modified slightly. The most recent alteration to this page was made on 2023-06-21 by E.A. Molinari Novoa.
Taxonomic status: This name is of an entity that is currently accepted taxonomically.
Gender: This genus name is currently treated as feminine.
Most recent taxonomic treatment adopted: Adl, S.M., Bass, D., Lane, C.E., Lukeš, J., Schoch, C.L., Smirnov, A., Agatha, S., Berney, C., Brown, M.W., Burki, F., Cárdenas, P., Čepička, I., Chistyakova, L., Del Campo, J. Dunthorn, M., Edvarsen, B., Eglit, Y., Guillou, L., Hampl, V., Heiss, A.A., Hoppenrath, M., James, T.Y., Karnkowska, A., Karpov, S., Kim, E.S., Kolisko, M., Kudryavtsev, A., Lahr, D.J.G., Lara, E., Le Gall, L., Lynn, D.H., Mann, D.G., Massana, R., Mitchell, E.A.D., Morrow, C., Park, J.S., Pawlowski, J.W., Powell, M.J., Richter, D.J., Rueckert, S., Shadwick, L., Shimano, S., Spiegel, F.W., Torruella, G., Youssef, N., Zlatogursky, V. & Zhang, Q.Q. (2019). Revisions to the classification, nomenclature, and diversity of Eukaryotes. Journal of Eukaryotic Microbiology 66: 4-119, 1 figure, 2 table, 3 appendices.
Comments: Psammosa is derived from the greek psammon, meaning sand, the material from which both species of Psammosa were isolated.
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Contributors
Some of the descriptions included in AlgaeBase were originally from the unpublished Encyclopedia of Algal Genera,
organised in the 1990s by Dr Bruce Parker on behalf of the Phycological Society of America (PSA)
and intended to be published in CD format.
These AlgaeBase descriptions are now being continually updated, and each current contributor is identified above.
The PSA and AlgaeBase warmly acknowledge the generosity of all past and present contributors and particularly the work of Dr Parker.
Descriptions of chrysophyte genera were subsequently published in J. Kristiansen & H.R. Preisig (eds.). 2001. Encyclopedia of Chrysophyte Genera. Bibliotheca Phycologica 110: 1-260.
Linking to this page: https://www.algaebase.org/search/genus/detail/?genus_id=51496
Citing AlgaeBase
Cite this record as:
E.A. Molinari Novoa in Guiry, M.D. & Guiry, G.M. 21 June 2023. AlgaeBase. World-wide electronic publication, National University of Ireland, Galway. https://www.algaebase.org; searched on 20 April 2024
