Pachyneis Simonsen, 1974

Holotype species: Pachyneis gerlachii Simonsen

Original publication: Simonsen, R. (1974). The diatom plankton of the Indian Ocean Expedition of R/V Meteor 1964-5. Meteor Forschungsergebnisse. Reihe D: Biologie 19: 1-107.

Description: Frustules in girdle view almost elliptical due to high curvature of valve plane. Valves fusiform with subacute apices, highly vaulted. Raphe straight, except near central nodule where both slits arch sidewise towards same side of valve; central pores very close to one another. Keel absent. Valve membrane very delicate, with 2-4 longitudinal folds on either side of raphe, crossed by straight apical and transapical costae. Striae very delicate, arranged in apical and transapical lines. Girdle bands absent. Similar to Haslea in the valvar outline and perpendicular striation, and Plagiotropis (Tropidoneis) in the highly vaulted valves and longitudinal folds. Rarely found in the tropical and subtropical plankton from the Indian and Pacific Oceans

Information contributed by: M.C. Amspoker. The most recent alteration to this page was made on 2023-02-25 by Salvador Valenzuela Miranda.

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

Most recent taxonomic treatment adopted: Tomas, C.R., Eds (1996). Identifying marine diatoms and dinoflagellates. pp. 1-858. San Diego: Academic Press Inc.

Comments: Round, Crawford & Mann (1990: 128) record this family as being a member of the Suborder Naviculineae.

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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Some of the descriptions included in AlgaeBase were originally from the unpublished Encyclopedia of Algal Genera, organised in the 1990s by Dr Bruce Parker on behalf of the Phycological Society of America (PSA) and intended to be published in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=46468

Citing AlgaeBase
Cite this record as:
Salvador Valenzuela Miranda in Guiry, M.D. & Guiry, G.M. 25 February 2023. AlgaeBase. World-wide electronic publication, National University of Ireland, Galway. https://www.algaebase.org; searched on 29 April 2024