The coding of morphological features of skeletal elements of rugosas as a basis for determinants was first applied by N. J. Spassky in 1971. Unlike the generic code key, in which qualitative differences were recorded, the proposed species key also includes quantitative parameters characterizing the morphology of the skeleton of corallites.

The present work is the first in the planned cycle of species identifiers of Devonian rugosas belonging to different orders. The identifier is based on a modified key developed by one of the authors in relation to the generic categories of ...

The works of Academician D.V.Nalivkin for a number of decades are table books of stratigraphers studying the Devonian sediments of the USSR. He described classical sections of the Devonian of Tral, Central Asia and other regions. On the basis of monographic studies of Devonian rugosities of the USSR, some remarks and conclusions can be made ...

All living organisms exist in certain habitats. But of special interest is not just the range of a species or genus, but the territory (or water area) where its representatives first appeared. This spatial unit can be called the primary areal of emergence.

A striking feature of the Devonian period is the widespread occurrence of reefs, most of which are associated with geosynclinal seas. In character and size, the Devonian reefs present a rather motley picture. The largest reefs are located in the marginal parts of geosynclinal troughs.

Almost throughout the Devonian, there were marine basins around the Pacific Ocean that belonged mainly to geosynclines. Caledonian folding, manifested in the second half of the Silurian in the Paleozoic geosynclines, gave rise to young mountain chains and island archipelagos that separated the continental seas.

It is 80 years since the birth of the outstanding Soviet geologist, Academician Dmitry Vasilyevich Nalivkin. The whole life and activity of D. V. Nalivkin is connected with the Leningrad Mining Institute.

The appearance of new morphological features is confined to a few few few epochs, which in time coincide with the beginning of regressive stages in the history of the Earth's development. In different lines of evolution of quadrangular corals, the main features of skeletal structure appear in a strictly defined sequence, but at different chronological milestones. Among the four-beam corals are distinguished monochronomorphs, confined only to certain time intervals and therefore of great stratigraphic importance, and polychronomorphs - morphologically similar forms of different age.

A detailed study of the Devonian representatives of the family Cyatho- phylloididaeDybowski allowed us to establish that their assignment to the genera Palaeophyllum Billings and Favisiella Dana is inaccurate. Both genera are characterized by the presence of a thin rim, and the first genus is characterized by branching colonies, and the second by massive...

Four-beam corals in the Ore Altai belong to the Tarkhan Formation. Until now, the Tournai quadrilateral corals of this area have remained monographically unstudied. The remains of corals of the Tar-Khan Formation were collected during their layer-by-layer study by V. P. Nekhoroshev in Russia. P. Nehoroshev in 1923-1930.

The problems of paleobiogeographic zoning cover a wide range of issues, among which the ways of fauna and flora distribution occupy not the least place. Knowledge of the main communications linking paleobiogeographic provinces and districts makes it possible to correlate even distant territories with a high degree of reliability, to identify features of commonality of the environment, to establish the belonging of an area to a particular province or region. The detailed study allowed us to solve a number of interesting problems related to the distribution of Devonian four-beam corals ...

Recently, the question of the upper boundary of the Eifelian Stage in the Urals has become more acute. Two All-Union meetings (in Sverdlovsk in 1957 on the unification of stratigraphic schemes of the Urals and in Leningrad in 1958 on facies maps of the Devonian period) made two different decisions on this question. In Sverdlovsk, it was decided to assign the Calceolian and Biysky layers on the western slope and their analogs on the eastern slope to the Eifelian Stage. In Leningrad, the decision of the 1951 All-Union meeting on the development of a unified scheme of Devonian stratigraphy was left in force.

The material on quadrangular corals was given to the author by E. A. Modzalevekna (area of Imachi station, Urusha River, and Gazimurovsky Plant); additional material on the Ildikan Formation of the Gazimurovsky Plant area was received from T. M. Malich, corals from Blagodatnoye settlement (Nerchinsk area) - from A. Lokerman. Difficult geological conditions did not favor good preservation of fossil remains of quadrangular corals. In spite of this, it was possible to characterize the age of all the formations from which the corals were brought.

The study of Devonian quadrangular corals was undertaken to substantiate the Devonian stratigraphy for the state geological survey of the Altai Mountains. During 1956-1958, coral collections from the following areas were processed: 1) the upper reaches of the Char River - Kalbinsky Ridge (collection of G. I. Sokratov, VSEGEI, 1953-1955); 2) the right bank of the Bukhtarma River [collection of V. P. Pnev, Irtyshskaya R. Pnev, Irtysh group of parties, East Kazakhstan Geological Administration (EKGU), 1956-1957]; 3) Pnevskoye field (collection of V. P. Pnev, 1953); 3) Pnev. Pnev, 1953); 4) Northern slope of the Sarym-Sakty ridge (collection of V. P. Pnev and V. Popov, 1956); 5) Southern Primarkakulia (collection of D. P. Avrov, N. P. Ivanov, VSEGEI; V. P. Pnev and others, VKSU, 1953-1957); 6) Uimenskaya Depression - Mountain Altai (collection of Y. S. Maimin, VSEGEI, 1957); 7) Kyzyl-Shin River basin - Mountain Altai (collection of E. N. Yanov, VSEGEI, 1957); 8) Zay-San area - Saursky Ridge (collection of V. V. Lebedev, VSEGEI, 1953; G. P. Kleiman and S. Kell, VKSU, 1953); 8) Zay-San area - Saursky Ridge (collection of V. V. Lebedev, VSEGEI, 1953; G. P. Kleiman and S. Kell, VKSU, 1957). Kell, VKSU, 1957).

Devonian sediments of the east of the Russian Platform and the Urals are extremely rich in minerals - oil and iron, bauxite and refractories. One of the most difficult questions of the Devonian stratigraphy of the Urals is probably the comparison of sections of the western and eastern slopes. This problem can be solved only on the basis of a monographic study of the fauna of both regions.