Habitus of one year old, representative, cultured fungal strains belonging to Eurotiomycetes and included in the phylogenetic analysis of Fig. 1. Anatomical structures were photographed from squashed sections mounted in water. Samples are reported with their number and the clade to which they belong as in Fig. 1. A1-A4) A922 (clade I) - A1, A2 habitus of the mycelium; A3, A4 fine, hyaline hyphae. B1-B4) A1022 (clade I) - B1, B2 habitus of the mycelium; B3, B4 fine, hyaline hyphae, gathering in entangled, plectenchymatous strands. C1-C7) A993 (clade II) - C1, C2 habitus of the mycelium; C3-C7 hyaline hyphae with branching and globose cells intercalating with cylindrical cells. D1-D5) A528 (clade III) - D1, D2 habitus of the mycelium; D3, D4 brown cell structures containing conidia-like cells (arrow in D4); D5, hyaline hyphae. E1-E5) A1026 (Epibryaceae) - E1, E2 habitus of the mycelium; E3-E5 dense aggregate of roundish, melanised cells containing inclusions, filamentous hyphae rarely present (E5). F1-F5) A1016 (Sclerococcum) – F1, F2 habitus of the mycelium; F3-F5 hyaline hyphae with branching and cylindrical, more or less elongated cells. G1-G7) A1053 (single branch, basal to clade VI) – G1, G2 habit of the melanized mycelium; G3-G7 hyphae composed by melanised, single or 1-septate cells, with numerous apical and lateral buds. H1-H5) A514 (basal to clade VI) – H1, H2 habitus of the mycelium; H3-H5 melanized hyphae with cylindrical cells, apical bud with roundish cells (H4), infrequent branching. I1-I5) A986 (clade VI) – I1, I2 habitus of the melanized mycelium; I3-I5 hyphae composed by globose, roundish cells, sometimes 1-septate (I3 arrow), with thick cell wall. J1-J4) A971 (clade VI) – J1 habitus of the melanized mycelium; J2-J4 melanized hyphae with cylindrical cells intercalating with roundish cells (J3 arrow), ramifications originate both from the cylindrical and the roundish cells. K1-K5) A1033 (Herpotrichiellaceae) – K1, K2 habitus of the melanized mycelium; K3-K5 melanized hyphae composed by elliptical, subcylindrical and subglobose cells constricted at the septa. L1-L3) A561 (basal to Chaetothyriaceae) melanized hyphae composed by elliptical, subcylindrical and subglobose cells constricted at the septa, frequently laterally and apically budding. Scale bars =4 mm (D1, G1, H1, I1, K1), 3 mm (A1, B1, C1, E1, F1), 1 mm (B2, D2, I2, K2), 0.5 mm (A2, C2, E2, F2, G2, H2, J1), 50 μm (B3, D3, F3, I5), 20 μm (A3, A4, B4, C3-C7, D4, D5, F4, F5, G3-G7, H3-H5, I3, I4, J2-J4, K3, K4, L2, L3)