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Table 3 Distinguishing features of species in Bettsia and Xerochrysium.

From: Xerochrysium gen. nov. and Bettsia, genera encompassing xerophilic species of Chrysosporium

Species

CYA, MEA

G25N (mm)

Colony size (mm) and morphology on MY50G

Dominant microscopic morphology from MY50G

Colony size (mm) and morphology on CZC50G

Bettsia alvei

No growth

1–20 (7 d)

15–35 (7 d); p ]40–65 (14 d) Colonies persistently white with a pale reverse; or black with a black reverse in the presence of cleistothecia

Solitary aleurioconidia

8–26 mm (14d) Sparse, hyaline

B. fastidia

No growth

1–5 (7 d)

15–22 (7 d); p ]35–42 (14 d) Colonies dull yellow to yellow brown; reverse yellow brown

Solitary aleurioconidia

21–26 mm (14d) Sparse, hyaline

Xerochrysium dermatitidis

No growth — 3 mm

1–9 (7 d)

4–10(7d); p ]12–20 (14 d) White or translucent

Chlamydo- and arthroconidia

18 mm (14d) Dense, white, slightlyfloccose, reverse cream-yellow reverse, occasionally red (Kinderlerer 1995)

X. xerophilum

No growth — 3 mm

1–9 (7 d)

9–20 (7 d); p ]20–38 (14 d) White; reverse white or pale yellow to apricot, khaki

Chlamydo- and arthroconidia

40–43 mm (14 d) Dense, white, slightly floccose, reverse cream-yellow to khaki-yellow