Dilsea Stackhouse, 1809

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: [50]-97.

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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.

Information contributed by: S.C. Lindstrom. The most recent alteration to this page was made on 2017-01-23 by M.D. Guiry.

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

Gender: This genus name is currently treated as feminine.

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: 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.

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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Some of the descriptions included in AlgaeBase were originally from the unpublished Encyclopedia of Algal Genera, organised in the 1990s by Dr Bruce Parker on behalf of the Phycological Society of America (PSA) and intended to be published in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=111

Citing AlgaeBase
Cite this record as:
M.D. Guiry in Guiry, M.D. & Guiry, G.M. 23 January 2017. AlgaeBase. World-wide electronic publication, National University of Ireland, Galway. https://www.algaebase.org; searched on 24 November 2024