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.
Taxonomic status: currently recognized as a distinct genus.
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.
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 2 Feb 2016 by M.D. Guiry.
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).
Numbers of names and species: There are 10 species names in the database at present, as well as 1 infraspecific names. Of the species names, 7 have been flagged as accepted taxonomically on the basis of the listed literature under the species name. In some instances, opinions on taxonomic validity differ from author to author and users are encouraged to form their own opinion. AlgaeBase is a work in progress and should not be regarded as a definitive source only as a guide to the literature..
Names: ('C' indicates a name that is accepted taxonomically; 'S' a homotypic or heterotypic synonym; 'U' indicates a name of uncertain taxonomic status, but which has been subjected to some verification nomenclaturally; 'P' indicates a preliminary AlgaeBase entry that has not been subjected to any kind of verification. For more information on a species click on it to activate a link to the Species database):
Click here to also show infraspecific names in the list below.
Verification of data
Users are responsible for verifying the accuracy of information before use, as noted on the website Content page.
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.
Created: 28 December 2000 by M.D. Guiry
Verified by: 02 February 2016 by M.D. Guiry
Linking to this page: http://www.algaebase.org/search/genus/detail/?genus_id=34350
Please cite this record as:
M.D. Guiry in Guiry, M.D. & Guiry, G.M. 2019. AlgaeBase. World-wide electronic publication, National University of Ireland, Galway. http://www.algaebase.org; searched on 17 November 2019.