Collema subconveniens
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| Collema subconveniens | |
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Scientific classification  | |
| Kingdom: | Fungi |
| Division: | Ascomycota |
| Class: | Lecanoromycetes |
| Order: | Peltigerales |
| Family: | Collemataceae |
| Genus: | Collema |
| Species: | C. subconveniens |
| Binomial name | |
| Collema subconveniens Nyl. (1888) | |
| Synonyms[1] | |
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Collema subconveniens is a species of jelly lichen in the family Collemataceae.[2] It forms a soft, leafy thallus on tree bark and is characterised by its firm texture and distinctive ascospores that have multiple cross-walls. Originally described in 1888 from New Zealand, the species is now known from scattered locations across the Southern Hemisphere including Australia, South America, Japan, and India.
Collema subconveniens was formally described as a new species by the Finnish lichenologist William Nylander in 1888, in his treatment of New Zealand lichens. In the Latin protologue he characterised it as closely resembling Collema flaccidum but with a firmer, smoother thallus lacking any farinose covering, and with turgid, fusiform ascospores that are three-septate with one or more additional longitudinal septa, measuring 0.023–0.027 mm long and 0.009–0.010 mm wide. Nylander also noted that the thin, non-reactive thallus lamina was about 0.1 mm thick when dry and 0.125 mm when moist, and that the species was corticolous, based on material sent to him as "C. flaccidum".[3]
Several names introduced a few years later by the Australian lichenologist Frances Wilson are now regarded as synonyms of Collema subconveniens. These include Leptogium olivaceum and Leptogium olivaceum var. isidiosum, both described in 1889 from Victoria, as well as Collema laeve f. isidiosum and Leptogium tremelloides var. muscitegens, which Wilson published in 1893.[1]