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Electronic Flora of South Australia Genus Fact Sheet
Phylum Rhodophyta – Family Rhodomelaceae – Tribe Amansieae
Thallus erect, pinnately branched, with slender axes bearing opposite determinate laterals which may become indeterminate as a further order of branching. Laterals and axes compressed, axes secondarily thickened below; holdfast discoid. Structure. Apices tapering, curved, pericentral cells 5, 2 lateral, 2 dorsal and 1 ventral, the lateral and dorsal cells forming a 2–1ayered medulla, with a cortex 2–3 cells thick. Trichoblasts short, branched, at apices of determinate laterals.
Reproduction: Reproductive structures borne on short, branched shoots in the axils of determinate laterals. Procarps probably on rudimentary trichoblasts, soon on polysiphonous shoots and pericarpic; carposporophytes with a basal fusion cell and branched gonimoblast with clavate terminal carposporangia; cystocarps globose, pericarp ostiolate, thick-walled. Spermatangial organs unknown.
Tetrasporangial stichidia in clusters on axillary shoots, linear but curved, corticated, with 2 rows of paired tetrasporangia.
Type (and only) species: N. merrifieldiae (J. Agardh) Wilson & Kraft 2000: 341.
Taxonomic notes: Nanopera is characterised by the habit, with opposite, pinnate, branches, by the presence of 5 pericentral cells, and especially by the formation of reproductive organs on short, branched, shoots in the axils of the determinate laterals. However, it is a little-known genus and further study is warranted.
References:
WILSON, S.M. & KRAFT, G.T. (2000). Morphological and taxonomic studies of selected genera from the Tribe Amansieae (Rhodomelaceae, Rhodophyta). Aust. Syst. Bot. 13, 325–372.
The Marine Benthic Flora of Southern Australia Part IIID complete list of references.
Publication:
Womersley, H.B.S. (24 February, 2003)
The Marine Benthic Flora of Southern Australia
Rhodophyta. Part IIID. Ceramiales – Delesseriaceae, Sarcomeniaceae, Rhodomelaceae
Reproduced with permission from The Marine Benthic Flora of Southern Australia Part IIID 2003, by H.B.S. Womersley. Australian Biological Resources Study, Canberra. Copyright Commonwealth of Australia.
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