The following classification scheme was adopted:
Anderson, J.M., Anderson, H.M., and Cleal, C.J. (2007) Brief history of the gymnosperms: classification, biodiversity, phytogeography and ecology, Strelitzia 20, South African National Biodiversity Institute, Pretoria (LINK).
Some relevant literature where Hermitia germanica is mentioned:
Vischer, H., Kerp, J.H.F., and Clement-Westerhof, J.A. (1986), Aspects of Permian Palaeobotany and Palynology. VI. Towards a flexible system of naming palaeozoic Conifers, Acta botanica neerlandica 35-2, pp. 87–100 (LINK).
Lausberg, S., and Kerp, J.H.F. (2000), Eine Coniferen-dominierte Flora aus dem Unterrotliegend von Alsenz, Saar-Nahe-Becken, Deutschland, Feddes Repertorium 111-7/8, pp. 399–426 (LINK).