1. |
Obligatory coprophilous species; sporangiophores bearing subsporangial vesicles and trophocysts |
2 |
1. |
Facultative coprophilous species; sporangiophores without subsporangial vesicles and trophocysts |
6 |
2. |
Sporangiospores globose, subglobose or ovoid |
3 |
2. |
Sporangiospores ellipsoid |
5 |
3. |
Subsporangial vesicles ovoid; sporangiospores globose or subglobose, thin-walled |
4 |
3. |
Subsporangial vesicles obovoid; sporangiospores thick-walled, spherical to broad ovoid |
Pilobolus oedipus
|
4. |
Trophocysts short, 180-610 × 125-270 µm; columellae cylindrical; sporangiospores subglobose, 7-11 µm in diam. |
P. minutus
|
4. |
Trophocysts long, 410-1800 × 240-420 µm; columellae conical; sporangiospores subglobose, 10-18.5 µm in diam. |
P. longipes
|
5. |
Columellae nipple-like; sporangiospores ellipsoid, pale yellow or hyaline 7.5-12 × 4.5-6.5 µm |
P. crystallinus
|
5. |
Columellae conical-cylindrical; sporangiospores ellipsoid, intensely yellow 10.5-17.5 × 5.5-8 µm |
P. kleinii
|
6. |
Sporangiophores bearing sporangia |
8 |
6. |
Sporangiophores bearing merosporangia or sporangiola |
7 |
7. |
Merospores produced in merosporangia |
Syncephalastrum racemosum
|
7. |
Pedicellate unispored sporangiola produced on a fertile vesicle |
Cunninghamella echinulata var. echinulata
|
8. |
Sporangiophores simple or with erect or curved branches; sporangia without sterile spines |
9 |
8. |
Sporangiophores with circinate branches; sporangia with a sterile spine |
Circinella muscae
|
9. |
Sporangia unapophysate; giant cells not produced |
10 |
9. |
Sporangia apophysate; giant cells present or absent |
20 |
10. |
Sporangiospores regular in shape and size |
11 |
10. |
Sporangiospores with varied shapes and sizes, globose, ovoid, cylindrical or fusiform |
Mucor variosporus
|
11. |
Sporangiophores unbranched or slightly branched |
12 |
11. |
Sporangiophores repeatedly branched |
13 |
12. |
Columellae obovoid; sporangiospores ellipsoidal, plano-convex 2.5-10 × 2-7.5 µm |
M. hiemalis
|
12. |
Columellae globose; sporangiospores long-elliptical and fusiform 2.5-8.1 (-12.5) × 1-5 µm |
M. luteus
|
13. |
Mesophilic species, not growing at 40 °C |
14 |
13. |
Thermotolerant, growing at 40 °C |
M. indicus
|
14. |
Columellae regular in shape; sporangiospores globose, subglobose or ellipsoid |
15 |
14. |
Columellae of several shapes; sporangiospores subspherical to ellipsoid |
Mucor sp.
|
15. |
Sporangiophores with swellings or not; sporangia with short lateral branches; columellae flattened, globose or obovoid; chlamydospores present or not, when present never abundant and never formed in reproductive structures |
16 |
15. |
Sporangiophores without swellings and with long lateral branches; columellae subglobose, ovoid or ellipsoid; abundant chlamydospores produced in sporangiophores and in a few columellae |
M. racemosus f. racemosus
|
16. |
Colonies high (up to 10 mm); sporangiophores curved or not; swellings under sporangia absent; columellae obovoid, globose or subglobose |
17 |
16. |
Colonies low (up to 2 mm); sporangiophores curved or not; swellings often viewed under sporangia; columellae flattened |
M. ramosissimus
|
17. |
Colonies initially white, turning gray in older cultures; sporangiophores up to 7 (-10) µm in diam.; sporangia black |
18 |
17. |
Colonies initially yellow, turning brownish in older cultures; sporangiophores up to 14 (-17) µm in diam.; sporangia gray-brownish |
19 |
18. |
Sporangiophores sympodially branched; dark sporangia, globose (15-) 20-72.5 (-75) µm; sporangiospores ellipsoid |
M. circinelloides f. griseo-cyanus
|
18. |
Sporangiophores sympodially or monopodially branched (rarely); sporangia dark brown, globose to slightly subglobose, 20-90 µm; sporangiospores globose to slightly subglobose |
M. circinelloides f. janssenii
|
19. |
Sporangia dark brown and globose, 35-85 µm; columellae obovoid; sporangiospores ellipsoid |
M. circinelloides f. circinelloides
|
19. |
Sporangia brown and globose, 21.5-92.5 µm; columellae globose; sporangiospores ellipsoid and sometimes irregularly shaped |
M. lusitanicus
|
20. |
Sporangiophores arising from stolons, never opposed to rhizoids, spherical sporangia, piriform or subpiriform and apophysed; giant cells present |
21 |
20. |
Sporangiophores arising from the aerial mycelium and/or stolons, opposed to rhizoids, sporangia apophysed, globose and subglobose; giant cells absent |
23 |
21. |
Thermophilic species, growing at 40°C; subsporangial septum absent or rare; sporangiospores globose, subglobose or ellipsoid; giant cells present |
22 |
21. |
Mesophilic species, not growing at 40°C; subsporangial septum present; sporangiospores cylindrical; giant cells absent |
Absidia cylindrospora var. cylindrospora
|
22. |
Columellae globose, subglobose and spatulate, often exhibiting projections; giant cells present |
Lichtheimia ramosa
|
22. |
Columellae subglobose and short hemispheric, without projections; giant cells absent |
L. brasiliensis
|
23. |
Rhizoids present, well developed, abundant and rhizopodiform; sporangiophores reaching 3 mm in length; columellae ovoid |
Rhizopus stolonifer
|
23. |
Rhizoids, undeveloped, simple or rarely branched when present; sporangiophores reaching 1.7 mm in length; columellae subglobose, hemiglobose, rarely oblong-ovoid |
R. arrhizus var. arrhizus
|