Multiclavula ichthyiformis is a species of terricolous (ground-dwelling) basidiolichen in the family Hygrophoraceae.

Found in Costa Rica, it was formally described as a new species in 2007 by Matthew Nelsen, Robert Lücking, Loengrin Umaña, Marie Trest, and Susan Will-Wolf.

Here, in a disturbed high-altitude peat bog in a rainforest, it was found growing on the ground along a brook and a road bank.

[1] The thallus of Multiclavula ichthyiformis is barely discernible as a greenish layer on the soil up to 5 cm (2 in) across, containing colonies of green algae (the photobiont, from the genus Coccomyxa)) and fungal hyphae.

Other ground-dwelling lichens that were prevalent in this habitat included Cladia aggregata, Cladonia confusa, Dictyonema glabratum, Icmadophila aversa, Phyllobaeis imbricata, and Siphula ceratites.