Dictyopteris serrata (Dictyotales, Phaeophyceae): A Little Known Algal Species Newly Recorded from Australia*
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چکیده
The brown alga Dictyopteris serrata (Areschoug) Hoyt (Dictyotales, Phaeophyceae) is reported from the coast of western Australia, representing the first reliable record of this species from outside the south-western Indian Ocean. Distinguishing features of D. serrata are: a broad thallus with marginal teeth, veins extending from the midrib obliquely towards the blade margin, and embedded tetrasporangia borne singly or in small groups of usually two or three in fertile zones on the upper thallus branches. The species is apparently closely related to the North American Dictyopteris hoytii Taylor, and previously perceived vegetative differences are questioned. The two species may differ in tetrasporangial distribution, but further studies are required to describe the sporangia of D. hoytii in greater detail.
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