Neodilsea Tokida, 1943

Holotype species: Neodilsea yendoana Tokida

Original publication and holotype designation: Tokida, J. (1943). On the so-called Dilsea edulis of Japan. Botanical Magazine, Tokyo 57: 93-97.

Description: Foliose, linear-lanceolate to orbiculate, with distinct stipe and discoid holdfast. Annual. Medulla of multinucleate, secondarily pit-connected, stellate cells with long arms, mixed with rhizoidal filaments. Inner cortical cells oblong to stellate. Outer cortical cells uninucleate, progressively smaller toward cuticle. Pit plugs lacking cap layers. Dioecious. Carpogonium terminating a long, distally recurved, proximally branched, adventitious filament. Connecting filaments from fertilized carpogonial branch contacting a succession of intercalary, distal auxiliary cells on separate, proximally branched, adventitious filaments. Cells of proximal branches sometimes forming secondary pit connections with vegetative cells. Gonimoblast arising from remnant of connecting filament attached to auxiliary cell. First-formed cells of gonimoblast incorporated into a fusion cell in most but not all species. Carpospores shed by erosion of thallus. Spermatangia superficial. Tetrasporophyte isomorphic. Tetrasporangia cruciate, attached laterally to intermediate cortical cells. Fertile in fall.

Information contributed by: S.C. Lindstrom. The most recent alteration to this page was made on 2016-02-02 by M.D. Guiry.

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

Most recent taxonomic treatment adopted: Saunders, G.W. (2008). A DNA barcode examination of the red algal family Dumontiaceae in Canadian waters reveals substantial cryptic diversity. 1. The foliolse Dilsea-Neodilsea complex and Weeksia. Botany 86: 773-789.

Comments: Neodilsea yendoana has been used in northern Japan in making an adhesive (Tokida, 1954). Restricted to the cool temperate North Pacific: northern Japan; Kurile Islands; Alaska; British Columbia; northern Washington. There is controversy over whether the Arctic Dilsea integra should be included in this genus (see Lindstrom, 1988).

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Some of the descriptions included in AlgaeBase were originally from the unpublished Encyclopedia of Algal Genera, organised in the 1990s by Dr Bruce Parker on behalf of the Phycological Society of America (PSA) and intended to be published in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. 02 February 2016. AlgaeBase. World-wide electronic publication, National University of Ireland, Galway.; searched on 09 December 2023

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