A biological study of Durvillaea antarctica (Chamisso) Hariot and D ...

44
separate spacies.
In 1921 Skottsberg stated that D. antarctica bl~des were
inflated and those of D. haY'veyi were compact, yet a photograph
taken in 1907 and published in 1941 (Pl. 3) is of a D.
ha~)eyi
pla.nt that is clearly honeycombed. With :cegard to habitats, he
stat..ed (1907:142) that D. haY'Veyi was 2l.pparently confined to the
subtidal in deeper wa tel'::' away from the pm-mr of the surf; and ill
the company of L@s8onia and MacY'ocystis. However, Dr R, Searles
who has dived in many places along the Chilean coast claiuls (pers.
conun.) to have found no subtidal DUY'villaea beds. In 1941 (pp28,
57) Skottsberg stated that D. harveyi extended into the low littoral,
and that it grew best on gently sloping reefs barely wCl,shed o't 10\-'
tide, and in semishel tered places where the surf was too moderate
for D, antarctica. This description fits perfectly such New
Zealand localities as Oaro Reef (Fig. 4.1f) and Wainui (Akaroa
Harbour) ~l1here there are beds of cape form D. antarctica.
These somewha_t contradictory accounts of D. harvey; above
provide further support to my cla~l that the morphological differences
are phenetic rather than genetic, and that they axe within the same
species D. antaY'ctica (ref. d1apter 5). 1 have found no evidence
to suggest that there is any Durvillaea species other than D.
antarctica in southern South America. There is insufficient
evidence t.o retain D. ha:t'Veyi Hook fil. as a separate entity,
(9) DUY'viZlaea montagnei Kuetzing, Species Algarum p.505
(1849) .
](uetzing listed Lamina:ria caepaestipes Mont. as a synonym of
D. montagnei Kue'tz, His diagnosis is very sirnilax to l:ha t of
Montagne's and contains no features that are significantly
different. The name is superfluous, and a synonym of D. mztarctica.
(10) Sa:t>cophycus simplex Kuetzing, Tabulae PhyeoZogicae. Vol. 10;
4, Table 71 Fig .. 2 (1860) ..
"stipite terete cra.ss
sirnplici sursum
in phylloma giganteum crassissimum oblongo-­
ellipticum, maxgine sinuoso-undLl.latum (nec
dentatum) apice obtusum expanso.'~
I sotype : BM: In handwriting annota-ted "SarcophYC:UB
simplex"..
A printed label gives the diagnos:.i.t;f