Abstract
Two species of crustose brown algae (Ralfsiaceae) are discussed. Petroderma maculiforme is described from several Massachusetts collections and Porterinema fluviatile is described for the first time from North America. The known world-wide distribution of both species is cited, and data are given on their ecology, and vegetative and reproductive periodicities. The wide range of salinities from which plants of these species have been collected indicate that they are both euryhaline. Lithoderma lignicola Kjeliman (1883) is synonymized with Petroderma maculiforme (Wollny) Kuckuck (1897) and Porterinema marina Jaasund (1965) with. P. fluviatile (Porter) Waern (1952).
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Communiccated by G. L. Voss, Miami
Systematics-Ecology Program Contribution No. 196.
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Wilce, R.T., Webber, E.E. & Sears, J.R. Petroderma and Porterinema in the New World. Marine Biology 5, 119–135 (1970). https://doi.org/10.1007/BF00352595
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DOI: https://doi.org/10.1007/BF00352595