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ALGAE FROM CABO FRIO UPWELLING AREA. 2. GELIDIOCOLAX PUSTULATA (GELIDIACEAE, RHODOPHYTA): AN UNUSUAL NEW PUTATIVE PARASITIC SPECIES 1

1984; Wiley; Volume: 20; Issue: 3 Linguagem: Inglês

10.1111/j.0022-3646.1984.00440.x

1529-8817

Yocie Yoneshigue, Eurico C. Oliveirã,

Plant and Fungal Species Descriptions

ABSTRACT A new species of Gelidiocolax Gardner, G. pustulata Oliveira and Yoneshigue, is described in the tropical western Atlantic from Brazil. The species usually grows on the basal portion of the main axis of Pterocladia capillacea (Gmelin) Bornet et Thuret. Abundant material was collected mainly from November to March at Cabo Frio Island, in the northeast part of the State of Rio de Janeiro, a marine area well known for its upwelling. Infection by the putative parasite seems to damage the host tissue, stimulating the development of a “gall‐like” structure that leads to the outgrowth of adventitious branches. The new species has the vegetative features and reproductive structures of the genus Gelidiocolax. It can be distinguished from the other Gelidiocolax species mainly on the basis of its position on the host, size of pustula, the tetrasporangia and the development of spermatangia. Studies of this new taxon support the placement of Gelidiocolax in the Gelidiaceae and not the Choreocolacaceae, as has been suggested in the literature.