Pedinella Vysotskii, 1887
Holotype species: Pedinella hexacostata Vysotskii [Vysotskij, Wysotzki, Wyssotzki]
Original publication and holotype designation: Vysotskii [Wysotzki], A.V. (1887). Les mastigophores et rhizopodes trouvés dans les lacs Weissowo et Repnoie (près Slaviansk, Gouvern. Kharkov). Trudy Obshchestva Ispytatelei Prirody Pri Imperatorskom Kharkovskom Universitetie 21: 119-140.
Taxonomic status: currently recognized as a distinct genus.
Gender: This genus name is currently treated as feminine.
Most recent taxonomic treatment adopted: Kawai, H. & Nakayama, T. (2015). Introduction (Heterokontobionta p.p.), Cryptophyta, Dinophyta, Haptophyta, Heterokontophyta (except Coscinodiscophyceae, Mediophyceae, Fragilariophyceae, Bacillariophyceae, Phaeophyceae, Eustigmatophyceae), Chlorarachniophyta, Euglenophyta. In: Syllabus of plant families. Adolf Engler's Syllabus der Pflanzenfamilien. Ed. 13. Phototrophic eukaryotic Algae. Glaucocystophyta, Cryptophyta, Dinophyta/Dinozoa, Haptophyta, Heterokontophyta/Ochrophyta, Chlorarachnniophyta/Cercozoa, Chlorophyta, Streptophyta p.p. (Frey, W. Eds), pp. 11-64, 103-139. Stuttgart: Borntraeger Science Publishers.
Pedinella Wyssotzki 1888 emend. Sekiguchi et al. (2003:168): Cells radially symmetrical, with a single anterior flagellum surrounded by tentacles. Six chloroplasts, peripherally situated. Pyrenoid present or absent. Stalk present, unbranched or branched; when branched, cells forming a colony. Cells free-swimming or sessile, attaching to the substratum via a stalk. Phagotrophic, capturing food particles with tentacles. Body scales present or absent. - (21 Nov 2006) - Wendy Guiry
Description: Cells naked, barrel-shaped with more or less prominent longitudinal ridges following the 6 elongated chloroplasts. Yellow-brown or greenish-brown. Chloroplasts, without pyrenoids, arranged concentrically around the median nucleus. Six short apical tentacles supported by microtubular triads protrude in a ring concentrically to the single apical flagellum. A paraflagellar rod supports the flagellar wing. A row of tubular (tripartite) hairs is located on the opposite side of flagellum. A relatively long cytoplasmic peduncle or stalk protrudes from the posterior part of the cell, attaching it to the substratum. The peduncle may detach temporarily at the distal end, allowing the cell to swim freely. Free-swimming Pedinella may be reminiscent of Pseudopedinella, with which it shares many morphological and anatomical features. The lack of pyrenoids in the Pedinella chloroplasts may, however, help distinguishing the genera. Nutrition is mixotrophic, bacteria are ingested by means of the anterior tentacles. The cell divides by longitudinal fission starting with the flagellum, and allowing for 2 cells to be observed with a partly common stalk or peduncle; sexual reproduction not observed. Found in shallow brackish waters, sessile on various substrates. Not common, Northern Europe
Information contributed by: J.Throndsen. The most recent alteration to this page was made on 8 Oct 2021 by M.D. Guiry.
Numbers of names and species: There are 11 species names in the database at present, of which 3 have been flagged as accepted taxonomically on the basis of the listed literature under the species name. In some instances, opinions on taxonomic validity differ from author to author and users are encouraged to form their own opinion. AlgaeBase is a work in progress and should not be regarded as a definitive source only as a guide to the literature..
Names: ('C' indicates a name that is accepted taxonomically; 'S' a homotypic or heterotypic synonym; 'U' indicates a name of uncertain taxonomic status, but which has been subjected to some verification nomenclaturally; 'P' indicates a preliminary AlgaeBase entry that has not been subjected to any kind of verification. For more information on a species click on it to activate a link to the Species database):
Click here to also show infraspecific names in the list below.
Sekiguchi, H., Kawachi, M., Nakayama, T. & Inouye, I. (2003). A taxonomic re-evaluation of the Pedinellales (Dictyochophyceae), based on morphological, behavioural and molecular data. Phycologia 42(2): 165-182, 40 figs, 3 tables.
Verification of data
Users are responsible for verifying the accuracy of information before use, as noted on the website Content page.
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.
Created: 23 April 2002 by M.D. Guiry
Verified by: 08 October 2021 by M.D. Guiry
Linking to this page: http://www.algaebase.org/search/genus/detail/?genus_id=44161
Please cite this record as:
M.D. Guiry in Guiry, M.D. & Guiry, G.M. 2021. AlgaeBase. World-wide electronic publication, National University of Ireland, Galway. http://www.algaebase.org; searched on 22 October 2021.