I don't think there are many Mucor fans here but I went to investigate a mucor-like microfungus produced on a tomato fruit at home.
I did some background research on what Mucorales grows on tomatoes and ended with a short list of five species: Rhizopus microsporus sl, R. stolonifer , Mucor plumbeus , M. racemosus , M. piriformis .
Under the microscope, I could not see basal rhizoids (but it is also a bit hard to extract them from the mesh of mycelia, like picking a mite from Bob Marley's hair) so I am assigning this to Mucor sp.
Furthermore, I have these findings:
Sorangiophores / hyphae: straight, silvery white (semi hyaline), 20-50um wide, sometimes branching below the sporangia.
Sporangia: Rounded, slightly compressed at the base, lead-gray (with olive-green tinge when not mature) to black, (47.6) 52.6 - 127.2 (187.2) × (41.4) 45.1 - 101.8 (122.4) µm [ Me = 77.4 × 70.9 µm ]
Columella: Pyriform, broadly conical, or boxing glove shaped, 30-80um wide [ Me = 104.9 × 78.1 µm ; Qe = 1.3 ]
Zygosporangia: not seen
Spores : Variable in shape from sunspherical to broadly ovate/broadly ellipsoid to sometimes more elongated (6.9) 8.4 - 11.1 (11.9) × (6.3) 6.8 - 9.6 (10.3) [Me = 9.7 × 8.2 err ; Qe = 1.2]
My finding compares will with Mucor pyriformis found here (spores and columella quite distinct)
What are your opinions?