In: Sydowia 77, (2025): 119-127; ISSN 0082-0598, DOI 10.12905/0380.sydowia77-2025-0119, Published online on September 10, 2024

A new homothallic species of Cunninghamella (Mucorales, Mucoromycota) with a synoptic key for the genus in the Neotropics

Leslie Waren Silva de Freitas, Cristina Maria Souza-Motta, Renan do Nascimento Barbosa, Roger Fagner Ribeiro Melo & André Luiz Cabral Monteiro de Azevedo Santiago*

1 Programa de Pós-Graduação em Biologia de Fungos, Departamento de Micologia. Universidade Federal de Pernambuco. Av.
Prof. Nelson Chaves, s/n, 50670420, Recife, Pernambuco, Brazil
* e-mail: andrelcabral@msn.com

Freitas L.W.S., Souza–Motta C.M, Barbosa R.N, Melo F.R.R. & Santiago A.L.C.M.A. (2024). A new homothallic species of Cunninghamella
(Mucorales, Mucoromycota) with a synoptic key for the genus in the Neotropics. – Sydowia 77: 119–127.

During a survey on anemophilous fungi at Pernambuco, Northeastern Brazil, a new species of Cunninghamella was identified,
combining both morphology and phylogeny. Cunninghamella neohomothallica, sp. nov., forms light gray colonies, blackspotted
due to the presence of zygosporangia. Sporophores are unbranched or branched up to five times, with subglobose, ovoid,
subclavate or clavate vesicles, bearing globose to subglobose sporangiola. Zygosporangia are brown, homothallic, opposite, with
two unequal suspensors. The strains exhibited optimal growth at 25 and 30 °C, with no development at 40 °C. Consequently, a
synoptic key to the Cunninghamella species in the Neotropics was provided. This study contributes to taxonomic knowledge on
Cunninghamella and highlights the importance of airborne fungal sampling for the discovery of new taxa.

Keywords: Airborne fungi, Cunninghamellaceae, Mucoromyceta, taxonomy.