This paper presents
Tomentella capitata and
Tomentella brunneocystidia as new species based on molecular data and anatomical features. Both
T. capitata and
T. brunneocystidia form sister species with
Tomentella pilosa. All three taxa are well supported by bootstrap values. Anatomically,
T. capitata and
T. brunneocystidia are very close and are similar in shape, size, ornamentation of basidiospores, and size and colour of subicular hyphae. Monomitic
rhizomorphs sometimes covered by irregularly shaped thin hyphae are present in both species. Shape and pigmentation of the
cystidia are the most discriminating features between
T. capitata and
T. brunneocystidia. The cystidia of
T. capitata are maximum 35 μm long, show a distinctive globose apex and are sometimes covered with dark brown pigmentation and/or encrustation,
whereas cystidia of
T. brunneocystidia are bigger, up to 55 μm long, with a sub-capitate shape and dark blue to dark green contents all over their length. The differences
to species, already described as having capitate and clavate cystidia, are discussed. A key for the identification of cystidioid
Tomentella species is given.
Taxonomical novelties: Tomentella capitata Yorou & Agerer, Tomentella brunneocystidia Yorou & Agerer.