Lenormandiopsis Papenfuss, 1967

Holotype species: Lenormandiopsis latifolia (Harvey & Greville) Papenfuss

Currently accepted name for the type species: Lenormandia latifolia Harvey & Greville

Original publication and holotype designation: Papenfuss, G.F. (1967). Notes on algal nomenclature - V. Various Chlorophyceae and Rhodophyceae. Phykos 5(1&2): 95-105.

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Description: Thalli erect from a discoid holdfast, a single, often large, broad blade (up to 38 X 12 cm) or with shallow to deep lobes (Norris 1987b). Margins of blades sometimes coarsely crenate. Midrib and veins usually not visible; a short midrib may be occur near the stipe. Thalli uniaxial, polysiphonous, dorsi-ventrally organized, the distal tip involute bearing dorsal vesiculate trichoblasts or scar cells along the axial row of cells (Norris 1987a). Axial cells surrounded by 5 pericentrals, four dividing longitudinally to form the medulla which expands into the broad blade. Thallus corticated by divisions of the pericentrals forming several layers of small-celled tissue. Two species have heteromorphic life histories with the gametophytes smaller than the tetrasporophytes. A third species appears isomorphic. Reproductive structures borne on small, cylindrical, polysiphonous branchlets in clusters (sori) on thallus surfaces. Branchlets have dorsiventral orientation, the distal end often curving toward the ventral side. Trichoblasts are on each segment on the dorsal side of fertile branchlets; gametangia are on the more central ones on the branchlet. Tetrasporangial branchlets bear trichoblasts or scar cells only on the proximal segments, the distal ones producing tetrasporangia, the entire fertile branchlet being a stichidium.

Information kindly contributed by R.E. Norris but may now be outdated.

Taxonomic status: This name is currently regarded as a synonym of Lenormandia.

Most recent taxonomic treatment adopted: Phillips, L.E. (2002). Taxonomy and molecular phylogeny of the red algal geuns Lenormandia (Rhodomelaceae, Ceramiales). Journal of Phycology 38: 184-208.

Comments: A rare subtidal genus of sub-tropical to warm temperate regions in the Indo-Pacific. Presently known only from southern Australia, Japan, India and northern Natal, South Africa.

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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Some of the descriptions included in AlgaeBase were originally from the unpublished Encyclopedia of Algal Genera, organised in the 1990s by Dr Bruce Parker on behalf of the Phycological Society of America (PSA) and intended to be published in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=42034

Citing AlgaeBase
Cite this record as:
M.D. Guiry in Guiry, M.D. & Guiry, G.M. 04 January 2011. AlgaeBase. World-wide electronic publication, National University of Ireland, Galway. https://www.algaebase.org; searched on 20 April 2024