Collemopsidium sublitorale (Leight.) Grube & B.D. Ryan

in Nash & al. (eds.), Lichen Flora of the Greater Sonoran Desert Region, 1: 163, 2002. Basionym: Verrucaria sublitoralis Leight. - Lich. Fl. Great Brit.: 435, 1871
Synonyms: Pyrenocollema sublitorale (Leight.) R.C. Harris
Description: Thallus crustose, endosubstratic and usually not evident. Perithecia scattered, black, 0.15-0.6(-1.5) mm in diam., clearly projecting, globose, often slightly flattened at the top. Involucrellum well-evident, brown-black, hemispherical or spreading laterally; exciple colourless to pale brown in upper half, more or less cellular; hamathecium of richly branched and anastomosing, 1.5-2 µm thick pseudoparaphyses, the hymenial gel I-. Asci 8-spored, subcylindrical to cylindrical, I-, bitunicate, with an ocular chamber and a fissitunicate dehiscence. Ascospores 1-septate, hyaline, narrowly ovoid, one cell usually longer than the other, (12-)15-20(-25) x 5-7(-10) µm, often with a thin gelatinous sheath. Pycnidia black, immersed or semi-immersed, flattened at top. Photobiont cyanobacterial (Hyella, the cells orange, in scattered clusters), or absent. Spot tests: all negative. Chemistry: without lichen substances.
Note: a maritime species growing on calcareous rocks, shells and barnacles in the littoral zone. Prior to 1992 it was treated as a synonym of C. halodytes, so that its total distribution is still poorly known; to be looked for in Italy.
Growth form: Crustose
Substrata: rocks
Photobiont: cyanobacteria, filamentous (e.g. Nostoc, Scytonema)
Reproductive strategy: mainly sexual
Periodically submerged (e.g. in creeks)
Taxon bound to maritime-coastal situations

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Predictive model

Source: - - Licence: CC BY-NC 3. Photo uploaded by Paul Cannon