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Schizoseris perriniae (Lucas) Womersley, comb. nov.

Phylum Rhodophyta – Family Delesseriaceae


Nitophyllum (Myriogramme?) perriniae Lucas 1931: 408, pl. 24. Guiler 1952: 102.

Myriogramme perriniae (Lucas) May 1965: 352, 400.

Thallus (Fig. 53A) rose-red, 8–20 cm high, with thick, branched stipes (possibly perennial) 2–8 cm long and 1–3 mm thick, continuing as a coarse central vein in blades (3–) 5–15 cm long and 2–8 cm broad, foliose and lobed with undulate wings, margins entire; central vein bearing alternate, lateral, subdichotomous veins (Fig. 53B, C) usually visible until close to the blade apices. Holdfast probably conical; epilithic. Structure. Growth marginal (Fig. 53D), without apical cells, marginal cells small and irregularly shaped, 4–6 µm broad, enlarging to angular mature blade cells, 25–45 µm across and L/D 1–1.5 (–2); young veins 1–3 cells broad, cells L/D 2–5, older veins 6–10 cells broad, basally many cells broad, stipes (Fig. 53F) with cells in tiers. Blades (Fig. 53E) monostromatic and 35–55 (–80) µm thick, cells in tiers in veins, polystromatic where reproductive. Cells multinucleate; rhodoplasts discoid.

Reproduction: Unknown.

Type from Georgetown, Tamar Est., Tas., 8–16 m deep (Perrin & Lucas, Jan. 1928), lectotype and isotypes in Herb. Lucas (currently in NSW), isotypes (?) in AD, A12241, A49609.

Selected specimens: Known from the type and Sarah I., Bathurst Ch., SW Tas., 2–5 m deep (Edgar 17, 11.iii.1995; AD, A64256). South Blackmans Bay, SE Tas., 2–10 m deep Sanderson, 4.xii.1999; AD, A68723). Trumpeter Bay, Bruny I., Tas., 31 m deep (Edgar, 18.iii.1999; AD, A68058).

Distribution map based
on current data relating to
specimens held in the
State Herbarium of SA

Distribution: Georgetown, N Tas., SW and SE Tasmania.

Taxonomic notes: Whereas S. hymenena has subdichotomous veins throughout, S. perriniae has a well developed basal stipe and a strong central main vein bearing lateral subdichotomous veins. However, S. perrinae is a little-known species and this difference and its reproduction need further study; it may be older, possibly second-year, plants of S. hymenena.


GUILER, E.R. (1952). The marine algae of Tasmania. Checklist with localities. Pap. Proc. R. Soc. Tasmania 86, 71–106.

LUCAS, A.H.S. (1931). Notes on Australian marine algae. VI. Proc. Linn. Soc. N.S.W. 56, 407–411, Plates 23–27.

MAY, V. (1965). A census and key to the species of Rhodophyceae (red algae) recorded from Australia. Contr. N.S. W. Natl Herb. 3, 349–429.

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

Author: H. B. S. Womersley

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.

Illustration in Womersley Part IIIA, 2003: FIG. 53.

Figure 53 image

Figure 53   enlarge

Fig. 53. Schizoseris perriniae (AD, A64256). A. Habit. B. Branch showing macroscopic veins. C. Detail of macroscopic veins. D. Marginal apex of frond. E. Transverse section of young vein and monostromatic blade. F. Transverse section of basal stipe.

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