Table 3.

Distinguishing features of species closely related to Penicillium speluncae.

	Conidia	CYA texture	YES soluble pigment	Yes reverse	Chaetoglobosins	Compactin	Penitrem	Roquefortine	Cytoglobosin	Prochaetoglobosin	Palitantin
P. speluncae	Smooth, broadly ellipsoidal	Velutinous to fasciculate	None	Orange yellow to orange	+	-	-	-	+	+	-
P. crustosum	Smooth, globose to subglobose	Velutinous to weakly fasciculate, becoming crustose	Pale brown or none	Strongly yellow	-	-	+	+	-	-	-
P. discolor	Rough, globose to subglobose	Velutinous to fasciculate	Brilliant red diffusible colour on YES	Orange turning into deep red with age	+	-	-	-	-	-	+
P. echinulatum	Rough, globose to subglobose	Velutinous to weakly fasciculate	None	yellow	-	-	-	-	-	-	+
P. solitum	Smooth to finely rough, globose to subglobose	Velutinous	None	yellow to orange	-	+	-	-	-	-	+