Hi
Small mushrooms but a big problem :)
This is the first species Nitschkia that I researched, so I lack experience.
A rich collection in ascomata so I devoted a large group to find a hair and subiculum. Despite many attempts, unfortunately, I have not found these elements.
Dimensions of spores are the most similar to Nitschkia modesta?
Nitschkia grevillei has a narrower spores.
Nitschkia pezizoidea has the most suitable spore sizes but ascomata not tuberculate.
Spores 1-septate (poorly visible):

(7.1) 7.5 - 9.7 (9.8) × (2.4) 2.5 - 2.9 (3.2) ?m
Q = (2.6) 2.7 - 3.5 (3.6); N = 15
Me = 8.5 × 2.7 ?m; QE = 3.1

9.73 2.80
9.19 2.54
8.83 2.89
8.53 2.91
9.77 2.68
7.29 2.73
7.68 2.81
8.14 2.75
7.47 2.89
9.49 3.21
8.08 2.52
8.30 2.37
9.68 2.84
9.02 2.87
7.06 2.35

greetings
Mirek