Two red macroalgae newly introduced into New Zealand: <i>Pachymeniopsis lanceolata</i> (K. Okamura) Y. Yamada <i>ex</i> S. Kawabata and <i>Fushitsunagia catenata</i> Filloramo <i>et</i> G. W. Saunders

Abstract Introductions of macroalgae are becoming more common with increased surveillance and the use molecular tools to unequivocally identify invaders. We here report two non-indigenous macroalgal species newly confirmed be present in New Zealand. Pachymeniopsis lanceolata is an irregularly divided foliose blade, first detected Lyttleton Harbour/Whakaraupō, South Island but also reported from North Island. It has known introductions its native range Pacific Asia Mediterranean, Atlantic eastern Pacific. The introduced cox 3 haplotype was found Zealand, suggesting a secondary introduction previous area, we novel case multiple introductions. Fushitsunagia catenata , recent segregate Lomentaria, Whakaraupō initially identified as Champia . Rbc L data shows that it belongs F. This Asian origin been have Spain, Mexico, Australia. provide morphological reproductive descriptions Continued surveillance, follow up monitoring, needed track expansion effects these on biotas.