Rhizoglomus clarum previously assigned as Glomus clarus and Rhizophagus clarus is recognized by spores size and color hyaline found for most glomoid species, with the latter attributed to the thickness of the second laminate layer of the spore wall (L3), which is very thin in white spores and much thicker in yellow to yellow-brown spores (INVAM).
We suggest this species to be categorized as Least Concern (LC) due to the several records worldwide.
Species distributed worldwide. The valid species and its synonym have different occurrence data, Glomus clarus with 2 occurrences and Rhizophagus clarus with 208 occurrences (GBIF).
A very common species in several countries. It has 210 data according to GBIF in 16 countries.
Population Trend: Stable
This species occurs in all Brazilian biomes: Amazon, Atlantic Forest, Cerrado, Caatinga, Pampa and Pantanal.
It presents no evident threat, being very common at least in Brazil.
Most records are in area with native vegetation of Brazil.
Other countries should be better surveyed for a better understanding of distribution of the species.
Jobim, K., Vista, X. M., & Goto, B. T. 2018. Updates on the knowledge of Arbuscular Mycorrhizal Fungi (Glomeromycotina) in the Atlantic Forest biome–an example of very high species richness in the Brazilian landscape. Mycotaxon, 133(1), 209-209.
Cofré, M. N., Soteras, F., del Rosario Iglesias, M., Velázquez, S., Abarca, C., Risio, L., ... & Lugo, M. A. (2019). Biodiversity of Arbuscular Mycorrhizal Fungi in South America: A Review. In Mycorrhizal Fungi in South America (pp. 49-72). Springer, Cham.
Winagraski, E., Kaschuk, G., Monteiro, P. H. R., Auer, C. G., & Higa, A. R. 2019. Diversity of arbuscular mycorrhizal fungi in forest ecosystems of Brazil: a review. Cerne, 25(1), 25-35.