| Taxon | Polymeridium submuriforme |
|---|---|
| Authority | Aptroot (2013) |
Polymeridium submuriforme is a species of corticolous (bark-dwelling) lichen in the family Trypetheliaceae.[1] It occurs in the Philippines. This lichen is characterized by its pinkish-grey thallus, which does not fluoresce under ultraviolet light. P. submuriforme is similar to Polymeridium cinereonigricans but can be distinguished by its much smaller and . The ascomata measure 0.3–0.6 mm in diameter, with a solitary, spherical that is . As the ascomata age, the wall expands up to 0.2 mm sideways. The ostiole is apical, and the hamathecium is inspersed. The number 6–8 per ascus, iodine-negative, somewhat , and measure 18–20 by 6–7.5 μm. These ascospores are not ornamented and are surrounded by a 1–2 μm wide gelatinous sheath. No chemical substances have been detected in this lichen. The type specimen was collected from Leyte on tree bark.[2]
References
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- ^ Aptroot, A. & Cáceres, M.E.S. (2014). "A refined species concept in the tropical microlichen genus Polymeridium (Trypetheliaceae) doubles the number of known species, with a world key to species". Nova Hedwigia. 98: 1–29.