Plagiolemma Paddock, 1988

Holotype species: Plagiolemma inflatum Paddock

Original publication and holotype designation: Paddock, T.B.B. (1988). Plagiotropis Pfitzer and Tropidoneis Cleve, a summary account. Bibliotheca Diatomologica 16: 1-152, 38 pls.

Description: Marine genus with elliptical to circular frustules in girdle view. Transapical axis narrow. Valves delicate, highly vaulted, with or without pseudostauros. Raphe sigmoid in valve view with an inconspicuous central nodule, borne on a ridge, and devoid of fins or fibulae. Plain girdle bands. Helictoglossae large and elaborated, forming a funnel-like structure. Polar endings of outer raphe fissure straight with large openings. Elongated terminal micropyles present. Central area with internal longitudinal crescentic thickenings. Valve with outer slit-like foramina and inner rounded hymenes. Plastids four, complexly lobed. Emended diagnosis (Nézan et al, 2018: 23)

Information contributed by: Nézan in Nézan et al. (2018). The most recent alteration to this page was made on 2024-08-07 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 neuter.

Most recent taxonomic treatment adopted: Nézan, E., Bilien, G., Boulben, S., Mertens, K.N. & Chomérat, N. (2018). Description and phylogenetic position of Plagiolemma distortum sp. nov., a new raphid diatom (Bacillariophyceae) from French coastal waters. Diatom Research 33(1): 13-24, 33 figs, 1 table.

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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Some of the descriptions included in AlgaeBase were originally from the unpublished Encyclopedia of Algal Genera, organised in the 1990s by Dr Bruce Parker on behalf of the Phycological Society of America (PSA) and intended to be published in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=46028

Citing AlgaeBase
Cite this record as:
M.D. Guiry in Guiry, M.D. & Guiry, G.M. 07 August 2024. AlgaeBase. World-wide electronic publication, National University of Ireland, Galway. https://www.algaebase.org; searched on 22 November 2024