• Proposed
  • 2Under Assessment
  • 3Preliminary Assessed
  • 4Assessed
  • 5Published

Acaulospora minuta Oehl, Tchabi, Hountondji, Palenz., I.C. Sánchez & G.A. Silva

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Scientific name
Acaulospora minuta
Oehl, Tchabi, Hountondji, Palenz., I.C. Sánchez & G.A. Silva
Common names
IUCN Specialist Group
Mushroom, Bracket and Puffball
Assessment status
Proposed by
Joana Veras
Comments etc.
Joana Veras

Assessment Notes

Taxonomic notes

It forms bright yellow-orange to orange-brown spores, (150-)175-230 in diameter, that have minute pits that are 0.5-1.2(-1.8) μm in diameter, 0.5-1.1 μm deep, and 1.0-2.5 μm apart. The species superfi cially resembles Acaulospora scrobiculata, which forms subhyaline to olive creamy spores that have larger, more irregular and deeper pits.

Why suggested for a Global Red List Assessment?

Due to the lack of adequate information to make a direct or indirect assessment of its risk of extinction, based on its distribution and / or population status, I would suggest that this species be categorized as insufficient data (DD)

Geographic range

Acaulospora minuta was frequently recovered from both undisturbed and cultivated agro-ecosystems of sub-Saharan West Africa, namely in Benin. It abundantly reproduced spores in trap cultures using Sorghum bicolor, Dioscorea cayenensis and Dioscorea rotundata in the glasshouse, and pure, monosporic cultures were readily established on Hieracium pilosella and Sorghum bicolor. Acaulospora minuta was one of the most frequent AM fungi collected during a study in the Guinea and Sudan Savannas in Benin.

Population and Trends

It is believed that with more studies in different habitats, this species will increase its occurrence number.

Population Trend:

Habitat and Ecology

In Brazil, Acaulospora minuta is found in Atlantic rainforest and Caantiga.

Subtropical/Tropical Dry ForestSubtropical/Tropical Moist Lowland ForestDry Savanna


This species can be found in Brazilian Tropical rainforest and Tropical Dry Forest. These forests currently have higher rates of deforestation, especially the Atlantic Forest, which is considered a hotspot.

Housing & urban areasTourism & recreation areas

Conservation Actions

Soil microorganisms, especially arbuscular mycorrhizal fungi, receive little attention in the field of conservation biology, although they play a crucial role in the production of fundamental ecosystem services, such as fertility, soil formation and maintenance, nutrient cycling and plant community dynamics , among others. For the conservation of these fungi, in addition to the soil, it is also necessary to preserve the associated

Site/area protectionResource & habitat protectionHabitat & natural process restoration

Research needed

Other areas should be studied in order to assess the distribution of this species.

TaxonomyPopulation size, distribution & trendsLife history & ecology

Use and Trade


OEHL, Fritz et al. Acaulospora minuta, a new arbuscular mycorrhizal fungal species from sub-Saharan Savannas of West Africa. Journal of Applied Botany and Food Quality, v. 84, n. 2, p. 213-218, 2011.
MAIA, Leonor Costa et al. Species diversity of Glomeromycota in Brazilian biomes. Sydowia, v. 72, p. 181-205, 2020.

Country occurrence

Regional Population and Trends

Country Trend Redlisted