Orculifilum Lindstrom, 1987

Holotype species: Orculifilum denticulatum S.C.Lindstrom

Original publication and holotype designation: Lindstrom, S.C. (1987). Orculifilum denticulatum (Dumontiaceae, Rhodophyta), a new genus and species from the northeast Pacific. Phycologia 26: 129-137.

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Description: Uniaxial, firm, distinctly flattened, ligulate, distichously to subdichotomously branched to four orders. Midrib and lateral veins sometimes evident. Margins denticulate. Rhizoids surrounding axial cell and four periaxial cells, which are attached near middle of axial cell. Cortex of isodiametric cells, progressively smaller toward cuticle. Cells uninucleate. Secondary pit connections lacking. Monoecious or dioecious. Carpogonium terminating a long, distally recurved, sparingly proximally branched, adventitious filament. Distal cells enlarged and lobed. Connecting filaments contacting a succession of intercalary, distal auxiliary cells on separate, adventitious, percurrent filaments. Secondary connecting filaments and gonimoblast initials arising from remnant of connecting filament attached to auxiliary cell. Cells of gonimoblast maturing into many, small carposporangia. Gonimoblast fusion cell lacking. Carpostome rudimentary. Spermatangia superficial, cut off by oblique walls. Tetrasporophyte unknown.

Information contributed by: S.C. Lindstrom. The most recent alteration to this page was made on 2023-10-07 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 neuter.

Most recent taxonomic treatment adopted: Lindstrom, S.C. & Scagel, R.F. (1987). The marine algae of British Columbia, northwern Washington, and southeast Alaska: division Rhodophyta (red algae), class Rhodophyceae, order Gigartinales, family Dumontiaceae, with an introduction to the order Gigartinales. Canadian Journal of Botany 65: 2202-2232, 99 figs.

Comments: Strictly subtidal. Known only from the vicinity of Juneau, Alaska

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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Some of the descriptions included in AlgaeBase were originally from the unpublished Encyclopedia of Algal Genera, organised in the 1990s by Dr Bruce Parker on behalf of the Phycological Society of America (PSA) and intended to be published in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=42713

Citing AlgaeBase
Cite this record as:
M.D. Guiry in Guiry, M.D. & Guiry, G.M. 07 October 2023. AlgaeBase. World-wide electronic publication, National University of Ireland, Galway. https://www.algaebase.org; searched on 26 April 2024