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

Mucor guilliermondii Nadson & Filippov

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Scientific name
Mucor guilliermondii
Nadson & Filippov
Common names
IUCN Specialist Group
Chytrid, Zygomycete, Downy Mildew and Slime Mould
Incertae sedis
Assessment status
Proposed by
Leslie Freitas
Comments etc.
Leslie Freitas

Assessment Notes

Taxonomic notes

Colonies white, the reverse yellow, rapidly growing on BDA at 25 ° C. Sporangiophores poorly branched, erect or curved. Sporangia hyaline to yellowish, globose to subglobose, wall deliquescent,  58-65 μm, multisporate. Columellae elongated-conical, rare subglobose and ellipsoidal with lightly incrusted wall, 15–30 × 5.5–14.5 μm, majority with 15–20 × 5.0–8.5 μm; collar small or absent. Sporangiospores hyaline, smooth walled, 3.5–8 × 2–4.5 μm, ellipsoid and cylindrical to reniform, some irregular, with a droplet at each end. hlamydospores globose, 12.5–23 μm, subglobose, cylindrical and doliiform, 10–22.5 × 8–22 μm. Zygospores not observed.

Why suggested for a Global Red List Assessment?

Due to the lack of distribution I would suggest this species to be categorized as insufficient data (DD).

Geographic range

The species in known in 5 countries. In Brazil, it is known in 1 of the 26 states.

Population and Trends

It is a rare species, only known in 5 countries and not frequently isolated.

Population Trend:

Habitat and Ecology

Isolated from dung, soil, indoor air of refrigerator.


In Brazil, this species was recorded in the Atlantic Forest, a hotspot.

Conservation Actions

Research needed

Use and Trade


SCHIPPER, M. A. A. 1990. On certain species of Mucor with a key to all accepted species. Studies in Mycology 25: 1–53.

Nadson MMG, Philippov G. 1925. Une nouvelle Mucorinée. Mucor guilliermondii nov. sp. et ses forms-levures. Rev. Gén. Bot. 37: 450–463.

Country occurrence

Regional Population and Trends

Country Trend Redlisted