Pinnunavis H.Okuno, 1975

Holotype species: Pinnunavis elegans (W.Smith) Okuno

Original publication and holotype designation: Okuno, H. (1975). The fine structure of the frustules of the Bacillariophyta. In: Advance of Phycology in Japan. (Tokida, J. & Hirose, H. Eds), pp. 97-113. The Hague: W. Junk.

Description: Valves elliptic-lanceolate (naviculoid) with obtuse or produced ends. Axial area linear, narrow or widened in the middle; suborbicular to elliptical central area large. Striae chambered; each chamber (alveolus) with an outer wall containing 3-4 rows of small round poroids; inner wall absent; side walls of the alveoli not perforated.

Information contributed by: M.C. Amspoker & M.D. Guiry. The most recent alteration to this page was made on 2018-06-12 by M.D. Guiry.

Taxonomic status: This name is of an entity that is currently accepted taxonomically.

Comments: Species of the genus resemble Navicula in valvar outline and Pinnularia in presence of alveoloid striae. Krammer & Lange-Bertalot (1986) retain the type species in Navicula, but later authors recognise the genus.

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Some of the descriptions included in AlgaeBase were originally from the unpublished Encyclopedia of Algal Genera, organised in the 1990s by Dr Bruce Parker on behalf of the Phycological Society of America (PSA) and intended to be published in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

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M.D. Guiry in Guiry, M.D. & Guiry, G.M. 12 June 2018. AlgaeBase. World-wide electronic publication, National University of Ireland, Galway.; searched on 11 December 2023

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