Electronic Flora of South Australia Genus Fact Sheet

Genus STICTYOSIPHON Kützing 1843: 301

Phylum Phaeophyta – Order Dictyosiphonales – Family Striariaceae

Thallus (sporophyte) slender, much branched irregularly oppositely or verticillately for several orders, with long, uniseriate apices surmounted by a basally meristematic filament. Structure of branches becoming polystichous below by longitudinal cell divisions, with the inner and outer cells remaining in tiers in smaller branches, remaining solid or becoming hollow, with a small-celled monostromatic cortex and 3–5 large, inner, medullary cells; cells with numerous phaeoplasts, each with a pyrenoid. Phaeophycean hairs opposite, scattered or in whorls.

Microthallus pulvinate or tufted, filamentous, branched, with erect filaments. Life history diplohaplontic and heteromorphic, or direct from the sporophyte. Reproduction of sporophyte by plurilocular sporangia formed by subdivision of single or grouped cortical cells, protruding only slightly and without paraphyses; unilocular sporangia formed in similar positions in some species.

Microthallus with plurilocular gametangia producing isogametes (Caram 1965, p. 134).

Type species: S. adriaticus Kützing.

Taxonomic notes: A genus of four or five species, in the North Atlantic, Mediterranean and North Pacific (Naylor 1958).

References:

CARAM, B. (1965). Recherches sur la reproduction et le cycle sexué de quelques Phéophycées. Vie et Milieu 16, 21–222.

KÜTZING, F.T. (1843). Phycologia generalis. (Leipzig.)

NAYLOR, M. (1958). Observations on the taxonomy of the genus Stictyosiphon Kiitz. Rev. Algol., N.S., 4, 7–24.

The Marine Benthic Flora of Southern Australia Part II complete list of references.

Author: H.B.S. Womersley

Publication: Womersley, H.B.S. (14 December, 1987)
The Marine Benthic Flora of Southern Australia
Part II
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