Tubeufiaceae M.E. Barr, Mycologia 71: 948 (1979).

Monotypic, characters same as for Tubeufiales.
Family type: Tubeufia Penz. & Sacc.
Notes: Below we list the genera accepted in the Tubeufiaceae. Acceptance is based on morphological characteristics and/ or molecular data. Generic names based on sexual or asexual types are treated equally.
Key to genera of Tubeufiaceae
1. Ascomata present . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.2
1. Ascomata lacking . . . . . . . . . . . . . . . . . . . . . . . . . . 0.15
2. Ascomata with setose appendages or flexuous hyphae,
seated directly on substrate . . . . . . . . . . . . . . . . . . . . 0.3
2. Ascomata without appendages, seated on a basal
subiculum . . . . . . . . . . . . . . . . . . . . . . 0.12
3. Asexual state known in culture . . . . . . . . . . . . . . . . . 0.4
3. Asexual state not known . . . . . . . . . . . . . . . . . . . . . . 0.7
4. Conidia dictyochlamydosporous, black . .Chlamydotubeufia
4. Conidia helicosporous, hyaline to pale brown . . . . . . 0.5
5. Conidia born in sheath, helicoma-like . . . . Helicangiospora
5. Conidia born on hyphae, helicosporium-like . . . . . . . 0.6
6. Conidiophores mononematous . . . . . . Acanthohelicospora
6. Conidiophores micronematous . . . . . Neoacanthostigma
7. Ascospores filiform, spiral in asci . . . . . Acanthophiobolus
7. Ascospores fusiform, clavate-fusiform, cylindric-fusoid, 2–
3-seriate in asci . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.8

8. Ascospores muriform, dictyoseptate . . . Boerlagiomyces
8. Ascospores phragmosporous, trans-septate . . . . . . . . 0.9
9. Ascospores greater than 30-septate . . . . . . Kamalomyces
9. Ascospores less than 30-septate . . . . . . . . . . . . . . . . 0.10
10. Ascospores equally 5-septate . . . . . . . . Thaxteriellopsis
10. Ascospores greater than 5-septate . . . . . . . . . . . . . .0.11
11. Ascomata greater than 200μm diam; ascospores hyaline
to pale brown ..Acanthostigmina
11. Ascomata less than 200μm diam; ascospores hyaline
. . . . . . . . . . . . . . . . . . .Acanthostigma
12. Ascomata on scale insects . . . . . . . . . . . . . Podonectria
12. Ascomata on decaying or rotting wood . . . . . . . .0.1312
13. Ascospores allantoid or vermiform, equally 7-
septate . . . . . . . . . . . . . . . . . . Thaxteriella
13. Ascospores elongated cylindrical-subfusiform, greater
than 7-septate . . . . . . . . . . . . . . . . . . . . . . . . . . .0.1413
14. Ascomata pale yellow to pale brown; with numerous
pseudoparaphyses . . . . . . . . . . . . . . . . . . . . . Tubeufia
14. Ascomata dark brown to black; lacking
pseudoparaphyses . . . . . . . . . . . . . . Bifrontia
15. Conidia dictyosporous, apically appendaged, heavily
pigmented . . . . . . . . . . . . . . . . . . . . . . . Tamhinispora
15. Conidia phragmosporous, helicosporous, light
pigmented . . . . . . . . . . . . . . . . . . . . . 0.16
16. Conidia fusoid to sickle-shaped, slightly curved, always
aquatic . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Aquaphila
16. Conidia coiled, aquatic or terrestrial . . . . . . . . . . . 0.17
17. Conidiophores absent; conidia borne directly on
hyphae . . . . . . . . . . . . . . . . . . Helicomyces
17. Conidiophores present, dark pigmented . . . . . . . . . 0.18
18. Conidia coiled 1–1½ times; conidial filament greater than
6μm wide . . . . . . . . . . . . . . . . . . . . . . . . . . . Helicoma
18. Conidia coiled 3½–4½ times; conidial filament less than
6μm wide . . . . . . . . . . . . . . . . . . . . . . . Helicosporium