Description: This small ‘bark-pimple’ species (discs 0.2–0.4mm diam.) first described from ash bark, grows on a variety of hosts. Thallus: no more than a pale brown blotch, so could be readily overlooked for A. analepta (described elsewhere), except for the K- involucrellum. A squash of the spores (19–26µm long) bears comparison with A. punctiformis (described elsewhere), which has much smaller discs (0.1–0.23mm diam.) and spores (16–20µm long). In Ireland, the species is scattered.

Key Identification Features:

• • In the field rather like A. analepta; suspicious material should be squashed or sectioned for examination under the microscope
• Spores like those of A. punctiformis but larger; on ash, alder, holly.

Original text submitted by Vince J. Giavarini

Distribution Map from NBN: Naetrocymbe fraxini at National Biodiversity Network mapping facility, data for UK.

iNaturalist: Naetrocymbe fraxini at iNaturalist World Species Observations database.