Abstract

Longicorn beetles of the New Zealand genus Coptomma Newman are associated with a wide range of both native and exotic tree genera and are of some economic importance in forestry and horticulture because they kill leading shoots and degrade sawn timber. In this paper, the genus is revised and its scope is redefined. The genus Navomorpha White is synonymised with Coptomma. Two species, N. textorium and N. philpotti, are synonymised with Coptomma lineatum (Fabricius). A new species, C. marrisi, is described for Coptomma. All known species are redescribed. As a result of this revision, the present number of species in Coptomma has increased to five: C. variegatum, C. lineatum, C. sulcatum, C. sticticum and C. marrisi. A key to species is given. Terminalia of both sexes are illustrated and described. The phylogeny of species is analysed cladistically and the monophyly of the genus is confirmed. Coptomma is widely distributed on the North Island, South Island, Stewart Island and Three Kings Islands of New Zealand. Known biology is noted for each species. The distribution of each species is mapped and discussed.