eesti teaduste
akadeemia kirjastus
SINCE 1952
Earth Science cover
Estonian Journal of Earth Sciences
ISSN 1736-7557 (Electronic)
ISSN 1736-4728 (Print)
Impact Factor (2020): 0.789

New data on Karksiodus (Chondrichthyes) from the Main Devonian Field (East European Platform); pp. 156–165

Full article in PDF format | doi: 10.3176/earth.2014.14

Alexander Ivanov, Tiiu Märss


New teeth belonging to Karksiodus mirus Ivanov & Märss (Chondrichthyes) were found together with putative chondrichthyan scales in five new localities of the Leningrad Region, northwestern Russia, within the Aruküla and Burtnieki regional stages, Givetian, Middle Devonian. The teeth exhibit variability in the number of cusps, angles between the lateral cusps, base curvature, length of lateral parts and the prominence of the wall of the transversal basal canal. Karksiodus tooth material collected from these sites suggests that this taxon possesses an heterodont dentition and a specific, complex vascularization system affecting the dental base and the crown. Enameloid tissue seems to be absent, thus the surface striations on the cusps are presumably made up by orthodentine. The fish fauna from these localities is listed.


Borisyak, A. A. 1922. Kurs Istoricheskoj Geologii (Geologicheskie periody) [Course of Historical Geology (Geological Periods)]. Gosizdat, Petrograd, 454 pp. [in Russian].

Ginter, M., Hampe, O. & Duffin, C. J. 2010. Chondrichthyes. Paleozoic Elasmobranchii: Teeth. Handbook of Paleo­ichthyology, Vol. 3D. Verlag Dr. Friedrich Pfeil, Munich, 168 pp.

Glinskiy, V. N. 2012. Distribution of the Givetian psammosteids in the eastern part of the Main Devonian Field. In Paleozoj Rossii: regional¢ naya stratigrafiya, pale­­­ontologiya, geo- i biosobytiya [Paleozoic of Russia: Regional Stratigraphy, Paleontology, Geo- and Bioevents, Contributions of III Russian Conference, September 2012, St. Petersburg] (Zhamoida, A. I., ed.), pp. 65–67. VSEGEI, St. Petersburg [in Russian].

Ivanov, A. O. & Glinskiy, V. N. 2011. Vertebrate assemblage from the Burtnieki Regional Stage (Givetian) of the Leningrad Region. In Biostratigraphy, Paleogeography and Events in Devonian and Lower Carboniferous, Abstracts of the International Conference in Memory of E. A. Yolkin, July–August, 2011, Ufa–Novosibirsk, Russia, pp. 55–56. Novosibirsk Publishing House SB RAS.

Ivanov, A. & Lebedev, O. 2011. Devonian Vertebrate Localities in the Luga River Basin (Leningrad Region, Russia). Guidebook of the Field Trip. St. Petersburg University Publishing House, St. Petersburg, 51 pp.

Ivanov, A. & Lukševičs, E. 1994. Famennian chondrichthyans from the Main and Central Devonian Fields. Daba un muzejs, 5, 24–29.

Ivanov, A., Zhuravlev, A., Stinkulis, G., Evdokimova, I., Dronov, A., Sokiran, E., Shishlov, S., Broushkin, A. & Myshkina, N. 2005. Devonian Sections of North-West of East European Platform. Guidebook of the Post-Conference Field Trip. St. Petersburg University Publishing House, St. Petersburg, 74 pp.

Ivanov, A., Märss, T. & Kleesment, A. 2011. A new elasmobranch Karksiodus mirus gen. et sp. nov. from the Burtnieki Regional Stage, Middle Devonian of Estonia. Estonian Journal of Earth Sciences, 60, 22–30.

Ivanov, A. О., Stinkulis, G. V., Evdokimova, I. O. & Zhuravlev, A. V. 2012. Opornye razrezy eifel¢ skikh–nizhnefranskikh otlozhenij vostoka Glavnogo devonskogo polya [Key-Sections of the Eifelian–Lower Frasnian Deposits of the Eastern Part of the Main Devonian Field. Guidebook of the Field Trip]. St. Petersburg, VSEGEI, St. Petersburg, 54 pp. [in Russian].

Karatajūtė-Talimaa, V. 1997. Lugalepis, a new genus of elasmobranchs from the Devonian of the western part of the Main Devonian Field. Geologija (Vilnius), 21, 24–31.

Maisey, J. G., Turner, S., Gavin Naylor, G. J. P. & Miller, R. F. 2014. Dental patterning in the earliest sharks: implications for tooth evolution. Journal of Morphology, 275, 586–596.

Mark-Kurik, E. 2000. The Middle Devonian fishes of the Baltic States (Estonia, Latvia) and Belarus. Courier Forschungsinstitut Senckenberg, 223, 309–324.

Mark-Kurik, E. & Karatajūtė-Talimaa, V. 2004. Chondrichthyan remains from the Middle and Late Devonian of the Baltic area. Archiv für Geschiebekunde, 3, 767–772.

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, 219–230.

Skutschas, P., Ivanov, A., Lukševičs, E. & Lebedev, O. 2011. The unique locality of Middle Devonian fishes in the Lemovzha River (Leningrad Region). In Palaeozoic Early Vertebrates. Abstract Volume of the II International Obruchev Symposium, August 2011, St. Petersburg (Lebedev, O. & Ivanov, A., eds). pp. 41–42. St. Petersburg University Publishing House, St. Petersburg.

Turner, S. 2004. Early vertebrates: analysis from microfossil evidence. In Recent Advances in the Origin and Early Radiation of Vertebrates (Arratia, g., Wilson, m. v. h. & Cloutier, R., eds), pp. 67–94. Verlag Dr. Friedrich Pfeil, München.

Valiukevičius, J. 1985. Acanthodians from the Narva Regional Stage of the Main Devonian Field. Mokslas Publishing House, Vilnius, 144 pp. [in Russian, with English summary].

Valiukevičius, J. 2000. Acanthodian biostratigraphy and interregional correlations of the Devonian of the Baltic States, Belarus, Ukraine and Russia. Courier Forschungsinstitut Senckenberg, 223, 271–289.

Back to Issue