Dilsea, 1809: 71
Holotype species: Dilsea edulis Stackhouse
Currently accepted name for the type species: Dilsea carnosa (Schmidel) Kuntze
Original publication and holotype designation:Stackhouse, J. (1809). Tentamen marino-cryptogamicum, ordinem novum; in genera et species distributum, in Classe XXIVta Linnaei sistens. Mémoires de la Société Imperiale des Naturalistes de Moscou 2: -97.
Taxonomic status: currently recognized as a distinct genus.
Description: Foliose, coriaceous, spathulate to cuneate to ovate, cleft or uncleft, with distinct stipe and discoid holdfast. Annual or perennial. 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, ovoid, progressively smaller toward cuticle. Dioecious. Carpogonium terminating a distally recurved, proximally branched, adventitious filament. Connecting filaments from fertilized carpogonial filament 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. Carpospores shed by erosion of thallus. Spermatangia, where known, superficial. Tetrasporophyte isomorphic. Tetrasporangia cruciate, intercalary in cortex (lateral in Dilsea integra). Fertile in fall and winter.
Comments: Intertidal or subtidal. Restricted to the cool temperate to arctic waters of the northern hemisphere: northeast Pacific Ocean, eastern Bering Sea, Arctic Ocean, North Atlantic Ocean.
NCBI Nucleotide Sequences
Numbers of names and species: There are 8 species (and infraspecific) names in the database at present, of which 5 have been flagged as currently accepted taxonomically.
Names: ('C' indicates a name that is currently 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):
Dilsea californica (J.Agardh) Kuntze C
Dilsea carnosa (Schmidel) Kuntze C
Dilsea edulis Stackhouse S - type
Dilsea integra (Kjellman) Rosenvinge C
Dilsea lindstromiae G.W.Saunders P
Dilsea natashae (S.C.Lindstrom) G.W.Saunders & S.C.Lindstrom C
Dilsea pygmaea (Setchell) Setchell C
Dilsea socialis (Postels & Ruprecht) Perestenko C
Saunders, G.W. & Lindstrom, S.C. (2011). A multigene phylogenetic assessment of the Dilsea/Neodilsea species complex (Dumontiaceae, Gigartinales) supports transfer of Neodilsea natashae to the genus Dilsea. Botanica Marina 54(5): 481-486.
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: http://www.algaebase.org/search/genus/detail/?genus_id=111
Cite this record as:
Guiry, M.D. & Guiry, G.M. 2013. AlgaeBase. World-wide electronic publication, National University of Ireland, Galway. http://www.algaebase.org; searched on 10 December 2013.
Algaebase taxon LSID: urn:lsid:algaebase.org:taxname:8374