Lemmopsis

Lemmopsis is a genus of fungi in the family Lichinaceae. These lichens form extremely small, black, crust-like growths that often appear as a thin dusting of granules on limestone rock or clay soil and become noticeably gelatinous when moist. Distinguished by their partnership with cyanobacteria that enables nitrogen fixation, they produce minute cup-shaped reproductive structures with reddish-brown discs and are identified by their combination of gelatinous thallus, robust-rimmed apothecia, and simple single-celled spores....read more on Wikipedia.