Subfamily
Psammosteinae Traquair, 1896
Selection of related publications
Glinskiy, V. 2018. Phylogenetic relationships of psammosteid heterostracans (Pteraspidiformes), Devonian jawless vertebrates.  Biological Communications   62,   4,   219-243. DOI:10.21638/11701/spbu03.2017.402
Glinskiy, V. N., Nilov, S. P. 2017. A new psammosteid (Agnatha, Heterostraci) from the Amata Regional Stage of the Main Devonian Field and morpho-histological types of discrete micromeric elements in the family Psammosteidae.  Estonian Journal of Earth Sciences   66,   2,   59-76. DOI:10.3176/earth.2017.05
Glinskiy, V., Mark-Kurik, E. 2016. Revision of Psammosteus livonicus Obruchev (Agnatha, Heterostraci) from the Devonian Amata Regional Stage of the NW of the East European Platform.  Estonian Journal of Earth Sciences   65,   1,   1-18. DOI:10.3176/earth.2016.02
Märss, T., Kleesment, A., Niit, M. 2008. Karksilepis parva gen. et sp. nov. (Chondrichthyes) from the Burtnieki Regional Stage, Middle Devonian of Estonia.  Estonian Journal of Earth Sciences   57,   4,   219-230. DOI:10.3176/earth.2008.4.02
Elliott, D. K., Mark-Kurik, E. 2005. A review of the lateral line sensory system in psammosteid heterostracans.  Revista Brasileira de Paleontologia   8,   2,   99-108. DOI:10.4072/rbp.2005.2.02
Mark-Kurik, E. 2000. The Middle Devonian fishes of the Baltic States (Estonia, Latvia) and Belarus.  Courier Forschungsinstitut Senckenberg    223,      309-324.
Novitskaya, L. I. 1971. Diagnostic evaluation of ornamentation in Agnatha and Pisces.  Paleontologicheski Zhurnal   1971,   4,   82-96.
Vorobyeva, E. I.,  Lyarskaya, L. A. 1968. Ostatki kisteperyh i dvoâkodyšaŝih iz amatskih sloev Latvii i ih zahoronenie.  Essays on phylogeny and systematics of fossil fishes and agnathans, pp. 71-86.   Nauka. 
Mark-Kurik, E. 1968. New finds of psammosteids (Heterostraci) in the Devonian of Estonia and Latvia.  Eesti NSV Teaduste Akadeemia Toimetised. Keemia, Geoloogia / Известия Академии наук Эстонской ССР. Химия. Геология   17,   4,   409-424. DOI:10.3176/chem.geol.1968.4.11
Mark-Kurik, E. J. 1966. O nekotoryh povreždeniâh èkzoskeleta psammosteid (Agnatha) [О некоторых повреждениях экзоскелета псаммостеид (Agnatha)].  The organism and environment in the geological past, pp. 55-60.   Nauka. 
Obruchev, D. V., Mark-Kurik, E. J. (eds) 1965. Devonian psammosteids (Agnatha, Psammosteidae) of the USSR. pp. 1-304.  Eesti NSV TA Geoloogia Instituut. 
Halstead Tarlo, L. B. H. 1965. Psammosteiformes (Agnatha) - A review with descriptions of new material from  the Lower Devonian of Poland. 2. Systematic part.  Palaeontologia Polonica   15,      1-168.
Halstead Tarlo, L. B. H. 1964. Psammosteiformes (Agnatha) - a review with descriptions of new material from  the Lower Devonian of Poland. 1. General part..  Palaeontologia Polonica   13,      1-135.
Obruchev, D. 1943. Yoglinia n. g., poslednij predstavitel' pteraspid iz srednego devona Leningradskoj oblasti.  Doklady Akademii Nauk SSSR   41,   1,   36-38.
List of species
1. Elgaia luhai (Mark-Kurik, 1965) | Aruküla Stage
2. Karelosteus weberi Obruchev, 1933 | Plavinas Stage
3. Psammosteus asper Obruchev, 1965 | Plavinas Stage
4. Psammosteus bergi (Obruchev, 1943) | Burtnieki Stage
5. Psammosteus cuneatus Obruchev, 1965 | Amata Stage
6. Psammosteus falcatus Gross, 1942 | Frasnian
7. Psammosteus levis Obruchev, 1965 | Amata Stage
8. Psammosteus livonicus Obruchev, 1965 | Amata Stage
10. Psammosteus megalopteryx (Trautschold, 1880) | Plavinas Stage
12. Psammosteus tchernovi Obruchev, 1965 | Frasnian
13. Psammosteus tenuis Obruchev, 1965 | Frasnian
14. Psammosteus waltergrossi Tarlo, 1965 | Frasnian
15. Traquairosteus? pectinatus (Obruchev, 1965) | Frasnian
16. Traquairosteus? ramosus (Glinskiy, 2017) | Amata Stage
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Classification
| Organism group | Biota | 
| Kingdom | Animalia | 
| Phylum | Chordata | 
| Subphylum | Vertebrata | 
| Superclass | Agnatha | 
| Class | Pteraspidomorphi | 
| Subclass | Heterostraci | 
| Order | Pteraspidiformes | 
| Suborder | Psammosteida | 
| Family | Psammosteidae | 
| Subfamily | Placosteinae | 
| Psammosteinae | |
| Genus | Elgaia | 
| Karelosteus | |
| Psammosteus | |
| Traquairosteus | |
| Psarkosteus | |
| Rohonosteus | |
| Schizosteus | |
| Tartuosteus | |
| Vladimirolepis | |
| Yoglinia |