Pachymenia - a question of species

A talk by Lisa Russell. The taxonomy of the New Zealand members of red algal genus Pachymenia J.Agardh (Halymeniaceae, Rhodophyta) has been contentious. Three New Zealand endemic species of are currently recognized: one prostrate species P. crassa and two foliose species P. laciniata and P. lusoria. As part of my PhD I have explored relationships between these New Zealand species, in particular between the intertidal species P. lusoria and P. laciniata in order to develop a clearer understanding of species boundaries. A multidisciplinary approach was undertaken combining molecular systematics and cell wall chemistry with more traditional approaches based on gross morphological characters. I will discuss here the results of these three approaches, firstly in relation to the New Zealand species of Pachymenia and secondly in relation to the generic boundaries between Pachymenia and a sister genus Aeodes. At the NEW Zoology Benham Building, 346 Great King Street, behind the Zoology car park by the Captain Cook Hotel. Use the main entrance of the Benham Building to get in and go to the Benham Seminar Room, Rm. 215, 2nd floor. Please be prompt as we have to hold the door open.