Actinella F.W.Lewis, 1864, nom. cons.

Holotype species: Actinella punctata F.W.Lewis

Original publication and holotype designation: Lewis, F.W. (1864). On some new and singular intermediate forms of Diatomaceae. Proceedings of the Academy of Natural Sciences of Philadelphia 15: 336-346.

Fossil: This is a genus of fossil species, or a genus with a fossil type species, or a genus the type species of which was originally described as a fossil.

Description: Frustules asymmetrical, more or less heteropolar on the apical axis, linear-arcuate, sometimes adhering at the narrower (foot) pole into stellate clusters. Girdle view heteropolar and often asymmetric. Transapical axis more or less heteropolar. Polar nodules present and simple; pseudoraphe present, often indistinct, central nodule lacking. Raphe simple, limited to the ventral angle of the polar parts, often very short. Punctate-striate, often showing marginal beads or delicate spines on the margins. A large pore often present at the apex of the frustule.

Information contributed by: Woodhead & Tweed (1957: 212). The most recent alteration to this page was made on 2023-07-21 by M.D. Guiry.

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: Woodhead, N. & Tweed, R.D. (1957). Revision of the diatom genus Actinella Lewis (Tibiella Bessey) . Biologisch Jaarboek 24(45 figs, 3 maps): 207-233.

Comments: Freshwater genus, also known from the fossil record.

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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Some of the descriptions included in AlgaeBase were originally from the unpublished Encyclopedia of Algal Genera, organised in the 1990s by Dr Bruce Parker on behalf of the Phycological Society of America (PSA) and intended to be published in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=43701

Citing AlgaeBase
Cite this record as:
M.D. Guiry in Guiry, M.D. & Guiry, G.M. 21 July 2023. AlgaeBase. World-wide electronic publication, National University of Ireland, Galway. https://www.algaebase.org; searched on 04 December 2024