Genus
Laccognathus Gross, 1941
Selection of related publications
Downs, J. P., Daeschler, E. B. Jenkins, F. A., Shubin, N. H. 2011. A new species of Laccognathus (Sarcopterygii, Porolepiformes) from the Late Devonian of Ellesmere Island, Nunavut, Canada.  Journal of Vertebrate Paleontology   31,   5,   981-996. DOI:10.1080/02724634.2011.599462
Vorobyeva, E. I. 2006. A New Species of Laccognathus (Porolepiform Crossopteygii) from the Devonian of Latvia.  Paleontological Journal   40,   3,   313-322. DOI:10.1134/S0031030106030129
Upeniece, I. 2001. The unique fossil assemblage from the Lode Quarry (Upper Devonian, Latvia).  Mitteilungen aus dem Museum für Naturkunde der Humboldt-Universität in Berlin      4,   101-119. DOI:10.5194/fr-4-101-2001
Mark-Kurik, E. 2000. The Middle Devonian fishes of the Baltic States (Estonia, Latvia) and Belarus.  Courier Forschungsinstitut Senckenberg    223,      309-324.
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. 
List of species
1. Laccognathus grossi Vorobyeva, 2006 | Gauja Stage
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Classification
| Organism group | Biota | 
| Kingdom | Animalia | 
| Phylum | Chordata | 
| Subphylum | Vertebrata | 
| Infraphylum | Gnathostomata | 
| Superclass | Osteichthyes | 
| Class | Sarcopterygii | 
| Subclass | Rhipidistia | 
| Order | Porolepiformes | 
| Family | Holoptychiidae | 
| Genus | Glyptolepis | 
| Hamodus | |
| Holoptychius | |
| Laccognathus | |
| Species | embryi | 
| grossi | |
| panderi | |
| Genus | Paraglyptolepis |