Subclass

Heterostraci Lankester, 1868


GIT 100-1	Psammosteus bergi \| Psammosteus bergi (Obruchev, 1943)	Karksi outcrop	Middle Devonian \| Burtnieki Formation
GIT 100-10	Psammolepis venyukovi \| Psammolepis venyukovi Obruchev, 1965	Jõksi müür outcrop	Gauja Stage
GIT 100-2	Placosteus alatus \| Psammolepis alata Mark-Kurik, 1965	Latvia, 100m from Vaive Watermill	Middle Devonian \| Gauja Formation
GIT 100-3	Psammolepis abavica \| Psammolepis abavica Mark-Kurik, 1965	Lējēji outcrop	Burtnieki Stage
GIT 100-5	Psammolepis paradoxa \| Psammolepis paradoxa Agassiz, 1844	Latvia, Raksti near Cesis, Gauja River basin	Middle Devonian \| Gauja Formation
GIT 100-7	Psammolepis venyukovi \| Psammolepis venyukovi Obruchev, 1965	Kalmetumägi outcrop	Middle Devonian \| Gauja Formation
GIT 100-8	Psammolepis venyukovi \| Psammolepis venyukovi Obruchev, 1965	Jõksi müür outcrop	Gauja Stage
GIT 100-9	Psammolepis venyukovi \| Psammolepis venyukovi Obruchev, 1965	Kalmetumägi outcrop	Middle Devonian \| Gauja Formation
GIT 116-1	Guerichosteus heterolepis \| Schizosteus heterolepis (Preobrazhensky, 1911)	Tori	Pärnu Stage
GIT 116-10	Psammolepis toriensis	Tori	Pärnu Stage