From the preface:
"Almost two years have elapsed since the last volume of Noctuidae Europaeae, Vol. 8, was published so the editors and authors are very pleased to be able to present volume 9. Even more than two years have been spent in the preparation of this book. As with Volume 10, the Catocalinae volume (Goater et al. 2003), the majority of subfamilies, tribes, and subtribes included here have not been studied since Hampson, Warren and Spuler, therefore more than for the Apameini volume of Noctuidae Europaeae (Zilli et al. 2005), we have based the higher systematics presented here on the paper published in Esperiana 10 (Fibiger & Lafontaine 2005). Even with that list, some groups were still on shakey ground. The systematics of the Noctuoidea were more firmly refined when the data available from first instar larvae (Kitching & Rawlins 1998; Beck 1999-2000), morphological research (Forbes 1954; Fibiger & Hacker 1991; Poole 1995; Speidel et al. 1996; Fibiger & Lafontaine 2005) and molecular studies (Mitchell et al. 1997, 2000, 2006) were taken into consideration (Lafontaine & Fibiger 2006). On the broader scale, the Nolidae, Arctiidae, Strepsimanidae, Erebidae and Lymantriidae were included as subfamilies of the Noctuidae but the Micronoctuidae were excluded. These inclusions are not all fully accepted, but such resistance are also known from previous debates concerning, e.g. the Aganainae and Agaristinae, and particularly among the (still too many) butterfly families. We believe that the Noctuidae (s. I.) ground plan are well supported, however, the systematic hierarchy for many units within the Noctuidae (s. I.) are not stable. When the species and genera from the tropics become as well known as those from the Holarctic region, much systematic changes will surely occur."