That's not easy to answer on the scant information provided! The name as used in that "old article" could refer to W. cochlearifolia OR (more likely for that part of New Zealand) W. mollis. The name may even have been used in error for a species of Papillaria such as P. crocea - as people frequently confuse these unrelated moss genera, or even the liverwort Lepicolea attenuata. Why not ask your M.Sc. supervisor Bruce Clarkson as he did his Phd on Taranaki ages back - he'd be most likely to know.....?
Cheerio
Peter J. de Lange