Mucor circinatus D.X. Lima, G. Walther & A.L. Santiago, 2017

Lima, Diogo X., Souza-Motta, Cristina M., Wagner, Lysett, Voigt, Kerstin, De Souza, Carlos A. F., De Oliveira, Rafael J. V., Da Silva, Gladstone A., De Azevedo Santiago, André L. C. M. & Walther, Grit, 2017, Circinella simplex-a misapplied name of Mucor circinatus sp. nov., Phytotaxa 329 (3), pp. 269-276 : 271-273

publication ID	https://doi.org/10.11646/phytotaxa.329.3.8
persistent identifier	https://treatment.plazi.org/id/03AB87DD-CC10-FFAD-FF7A-FA1AFF371E72
treatment provided by	Felipe
scientific name	Mucor circinatus D.X. Lima, G. Walther & A.L. Santiago
status	sp. nov.

Treatment

Mucor circinatus D.X. Lima, G. Walther & A.L. Santiago View in CoL , sp. nov.

Index fungorum number: IF551671;

Holotype: URM 90063 View Materials ( Herbarium URM), Brazil, January 2017, deposited by D. X. Lima. The ex type strain was deposited as URM 7218 in the Culture Collection ( Micoteca URM) of Federal University of Pernambuco, Brazil and as JMRC:SF: 012298 in the Jena Microbial Resource Collection ( JMRC at the Leibniz Institute for Natural Product Research and Infection Biology, Jena, Germany).

Colony initially white and then becoming yellow brown ( MP 13D1), covering the entire Petri dish ( 9 cm diam. × 0.5 cm in height) in four days; reverse cream ( MP 13K3). Odorless. Sporangiophores recurved, sympodially branched, width 2.5–12.5 (–18) μm diam. hyaline, slightly rough-walled, growing directly from the substrate, usually with a septum below the sporangium; circinate sympodial branches often arising in the curvature of the previous branch next to the septum. Sporangia initially light yellow then becoming brown, globular and smooth-walled, not deliquescent, breaking, (17.5–) 20 × 35.75 (–56.25) μm diam. Columellae smooth-walled, hyaline, frequently globose to applanate (12.5–) 17.5 × 28.75 (–43) μm diam. Collar evident. Sporangiospores angular (3.8–) 5 × 6.2 (–7.5) μm, hyaline, smooth-walled. Rhizoids-like filaments observed. Chlamydospores barrel shaped to cylindrical. Zygospores not observed. Probably heterothallic. Reduced growth ( 5.3 cm in 9 days) and sporulation at 12°C, optimal growth at 25°C ( 9 cm in 4 days); maximal growth temperature 30°C; similar growth on MEA and PDA at all temperatures, slightly better sporulation on MEA. Influence of light: not detected.

Habitat: soil

Distribution: Brazil ( Zycha 1935; Schoenlein-Crusius et al. 2006; de Souza et al. 2011), Colombia ( Gualdrón-Arenas et al. 1997) and Sri Lanka (Peries et al. 1976).

Specimen examined: BRAZIL, Pernambuco, Tamandaré, Saltinho Biological Reserve ( 8º43’09’’S 35º10’11’’W), soil., 2013, D.X. Lima (URM 90063).

Other examined specimens: CBS 142.35, CBS 284.92, CBS 428.80, CBS 540.80, CBS 548.89.

Notes: Mucor circinatus differs from other Mucor species by its circinate sporangiophores and the angular sporangiospores. The strains described by Hesseltine & Fennel (1955) as Circinella simplex belong in fact to M. circinatus .