... Devonian of Scotland) I found a number of – admittedly quite minor – problems. The John o’Groats Group (Scotland) is probably equivalent to the Abava Subformation of the Burtnieki Formation (Baltic), not to the overlying Gauja Formation as stated on p. 171; the as yet undescribed holoptychiid previously...

... Formation, the Tarvastu Member, contains the coccosteid Millerosteus cf. minor ( Newman et al. 2015 ). Overlying the Aruküla Formation is the Burtnieki Formation. The first two members of this formation (the Harma and Koorkula members) contain the coccosteid Coccosteus markae Obrucheva, 1962 which...

... flooding surface that occurs at the top of the transgressive portion of the Narva succession (see Tänavsuu-Milkeviciene et al. 2009 ). The upper boundary of the deltaic succession of the Kernave and Aruküla formations is not distinct and is covered by the deltaic succession of the Burtnieki Formation...

... (1981) identification of Asterolepis cf. thule from John o’ Groats was probably a misidentification. Marshall (1996 , 2000 ) dated the South East Shetland Group based on palynology as Givetian in age and correlated it with the Eday Group in Orkney and the John o’ Groats Sandstone Formation...

... Stage, Baltic region. Stratigraphic and geographical occurrence . In the Baltic region: Middle Devonian (Eifelian–lower Givetian) Pärnu-Narva-Aruküla-Burtnieki Regional Stages. In Scotland: Middle Devonian (Eifelian) Lybster Flagstone Formation and equivalent Caithness strata, lower than...

... the Burtnieki Regional Stage, Middle Devonian of Estonia : Estonian Journal of Earth Sciences , v. 57 , p. 219 – 230 , doi: 10.3176/earth.2008.4.02 . Miles , R.S. , 1973 , An actinolepid arthrodire from the Lower Devonian Peel Sound Formation, Prince of Wales Island : Palaeontographica A , v...