First record of Schizymenia apoda (Schizymeniaceae, Rhodophyta) in New Zealand

Abstract

The foliose red alga Schizymenia apoda (Schizymeniaceae) is reported for the first time in New Zealand waters. Its identity was confirmed by rbcL sequence data and morphological observations. This alga has been reported from both the Atlantic and the North Pacific and, although it is very variable in colour and habit, it is easily distinguished morphologically by the presence of refractive gland cells (visible in surface view), large cystocarps with a pronounced ostiole, and the lack of tetrasporophyte blades. Although not reported as an introduced species elsewhere, in New Zealand S. apoda was collected at the ferry terminal and on pontoons and pilings in the marinas of Wellington Harbour. It was also discovered in Otago Harbour. The examination of herbarium specimens and recent collections from areas outside the harbour has resulted in only a few samples that could be referred to this species, leading us to consider this a new introduction.