|
Electronic Flora of South Australia Genus Fact Sheet
Phylum Rhodophyta – Family Rhodomelaceae – Tribe Polysiphonieae
Thallus more-or-less erect, irregularly branched, with indeterminate axes and main branches bearing, sparsely or densely, short determinate laterals, all branches ecorticate. Structure. Subapical axial cells cutting off 4 pericentral cells; determinate laterals spirally arranged with 1/4 divergence, branched, bearing simple or branched trichoblasts.
Reproduction: Gametophytes dioecious. Carposporophytes with a basal fusion cell and branched gonimoblast with clavate terminal carposporangia. Cystocarps ovoid to urceolate; pericarp ostiolate, ecorticate. Spermatangial branches (where known) replacing whole trichoblast.
Tetrasporangia in determinate laterals, single per segment, spirally arranged.
Type species: T. glomerulata (C. Agardh) Schmitz 1897: 441.
Taxonomic notes: Tolypiocladia includes 3 species from tropical seas (see Silva et al. 1996, p. 554) plus the following new species from southern Australia. The latter agrees with the type species in being ecorticate, with 4 pericentral cells, but differs (from the other species also) in having closely arranged, overlapping, determinate laterals and (see Kylin 1956, p. 504) in having branched trichoblasts.
References:
KYLIN, H. (1956). Die Gattungen der Rhodophyceen. (Gleerups: Lund.)
SCHMITZ, F. & FALKENBERG, P. (1897). Rhodomelaceae. In Engler, A. & Prantl, K., Die natürlichen Pflanzenfamilien. T.1. Abt. 2, pp. 421–480. (Englemann: Leipzig.)
SILVA, P.C., BASSON, P.W. & MOE, R.L. (1996). Catalogue of the Benthic Marine Algae of the Indian Ocean. (Univ. California Press: Berkeley.)
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.
Email Contact: State Herbarium of South Australia |