Lichen: Acrocordia macrospora
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Name: Acrocordia macrospora A.Massal.
Pronunciation: Acrocordia macrospora
Acrocordia macrospora - the black dots are its perithecia - with the foliose thallus of Anaptychia runcinata growing down over it.
Acrocordia macrospora under the microscope showing an ascus with the 1-septate spores encased.
Body Type: Crustose
Conservation Evaluation: Least Concern, Nationally Scarce.
Description: The large black dots are perithecia; they range in size from 0.8 mm to 1 mm in diameter. The perithecial pore is prominent and circular. The thallus is visible and is grey to light-brown in colour. Spores are colourless and 1-septate.
Acrocordia macrospora with a clear view of some 1-septate spores.
Chemical Tests: All negative.
Nature Notes: This is a coastal lichen found in sheltered and shaded areas of the shore. Its substrate tends to be silica-poor to calcareous rocks.
Vice county map for Acarospora macrospora: See map.
Link: Map this species on the Lichen Survey
Other species recorded in Ireland:
- Acrocordia conoidea (Fr.) Körb.
- Acrocordia gemmata (Ach.) A.Massal.
- Acrocordia salweyi (Leight. ex Nyl.) A.L.Sm.
Text and images © Paul Whelan, 2009.