Abstract
ABSTRACTLecanora kohu Printzen, Blanchon, Fryday et de Lange is described as new to science from Rangatira (South East Island), Chatham Islands. It is morphologically similar to L. symmicta (Ach.) Ach., from which it is distinguished by the continuous, areolate thallus, immersed apothecia with pale pink to pink-brown discs, and by the presence of atranorin and psoromic acid rather than usnic acid, zeorin and xanthones in the thallus. The new species is so far known only from Rangatira (South East Island), the southernmost of the three main islands of the Chatham Islands group where it was collected twice in 2015 on the bark of Melicytus chathamicus (Violaceae) and on the bark of an undescribed species of Muehlenbeckia (Polygonaceae), M. aff. australis. Using the New Zealand Threat Classification System, the new species has been assessed as ‘Data Deficient’.
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