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1.
The newly recognized extant Asian conifer genus Cathaya is represented by fossil material in Europe. Female cones from the Oligocene of Saxony are assigned to C. europaea n. sp. ; these are distinguishable from the cones of the extant species of Cathaya. Cathaya abchasica n. sp. is based on foliar remains from the Pliocene of Abkhazia; the generic assignment is validated by comparison of the stomatal characteristics. The one previous fossil record of Cathaya in Europe is not considered valid. — J. A. Wolfe  相似文献   

2.
Nathorstia is a genus of Cretaceouslern with a broad distribution in the Northern Hemisphere. Previous authors have disagreed on the systematic position of Nathorstia, but investigation of the epidermis and sori of material from the lower Cretaceous of Primor'ye, Suyfun basin, has helped to clarify the problem. The genus was originally described by Heer, who assigned it to the family Marattiaceae, because of erroneous interpretation of the son. However, the true affinity is apparently with the Matoniaceae, particularly with the genus Phlebopteris Brongniart. A diagnosis of Nathorstia is presented, and N. pectinata (Goeppert) Krasilov, n. comb. (formerly Reussia pectinata Goeppert) is designated the type species. — S. H. Mamay.  相似文献   

3.
The latest Cambrian deposits of the Malyy Karatau in Kazakhstan contain nautiloid cephalopods associated with trilobites. Four new species of nautiloids are described and assigned as follows: Ellesmeroceratidae — Tamdoceras n. gen; T. lisogorae n. sp.; T. logicameratum n. sp.; Protocycloceratidae — Chabactoceras n. gen.; C. balashovi n. sp. — C. R. Palmer.  相似文献   

4.
Three new species and two new genera of scleractinian corals are described from the upper Oxfordian (Jurassic) limestones of Azerbaijan. Cyathopora parva, Thecosmilia vurguni, and Thecosmilia zagaliensis are described as new. The genus Brevimaeandra (Type species: B. alizadei nov. sp.) is compared with Mycetophyllopsis and Maeandrastraea, and is placed in the Family Montlivaltiidae. Grandifavia (Type species: G. bendukidzeae, nov. sp.) is placed in the Family Faviidae and is compared with Favia and Nefocoenia. No other constituents of the fauna are listed nor are references to such lists given. A brief introduction states that the limestones of middle Oxfordian age are probably reworked reef deposits, and that the coral and sponge reefs were deposited in waters probably not over 90 m deep. No stratigraphic sections are given. — D. F. Squires.  相似文献   

5.
This short section of Skarlato's monograph, Bivalve Mollusks of the Far Eastern Seas of the U. S. S. R. (Order Dysodonta), discusses the genus Arvella Bartsch, 1940 ms. The genus includes the species formerly assigned to Crenella. Diagnostic features of the species included in genus Arvella Bartsch are given. Vilasina Bartsch, 1940 ms is discussed, also The author states that the hinges of Vilasina clearly assign the species to the genus Crenella. The form and position of the umbo relate the species closely to the genus Arvella, though. The almost entirely smooth laminated surface distinguishes Vilasina from both genera, as does the finely serrated ventral edge of the shell. The last section discusses the genus Modiolus Lamarck, 1799. — A. W. Bellais.  相似文献   

6.
《International Geology Review》2012,54(12):2102-2104
Rozman, describing in 1960 the Famennian deposits of Mugodzhar, mentioned a new genus Pseudonudirostra to which were assigned Pseudonudirostra uralica (Nalivkin, 1947), P. posturalica sp. nov. and P. planoovalis (Nalivkin, 1937). Sartenaer in 1961 distinguished the genus Trifidorostellum with the type species Leiorhynchus dunbarense Haynes, 1916. A year later Rozman (1962) described the new genus Pseudoleiorhynchus (= Pseudonudirostra), with the type species Leiorhynchus uralicus Nalivkin. Sartenaer in 1963 visited Russia and both authors concluded that Pseudoleiorhynchus was a junior synonum of Trifidorostellum. The early Famennian T. dunbarense of America and the late Famennian T. uralicum of Russia form a single group of species of stratigraphic value for intercontinental correlation of Famennian deposits.--A.W. Norris.  相似文献   

7.
《International Geology Review》2012,54(10):1844-1846
Kurgalimova discusses the displacement of the aperture and the modification of its shape in the genera Gaudryina, Belorussiella, and Paragaudryina. The species G. navarroana Cushman, B. intermedia sp. nov., and P. pseudonavarroana (Balakh.) occur in fairly distinct stratigraphic position in lower to middle Eocene deposits of the southeastern part of the Turgay depression, South Emba and Bukhara Province.—M.A. Buzas  相似文献   

8.
Six new species of the genus Bythocytheremorpha, including B. centroscrobiculata, B. aksuensis, B. bicornis, B. (?) abnormis, B. torulosa, and B. ilyini, are reported and described from beds of Upper Cretaceous age (Cenomanian through Santonian) of the southwestern part of the Gissar Range, located in the southeast of Soviet Central Asia. These relatively primitive Cretaceous ostracods, which possess an intricately sculptured carapace, seem to have lived in a shallow, warm, marine environment. — R. H. Benson.  相似文献   

9.
Two species of subtriangular, trilete spores assigned to a new form genus, Acritosporites, occur in Cenomanian and Turonian sandstones and silty clays of central U. S. S. R. Three proximal, interradial, oval "lacunae" and one distal, circular "lacuna" characterize the genus. The author, in disagreement with Bolkhovitina, prefers not to ally A. sibiricus (Bolkh.) comb. nov. with Lygodium. — D. C. McGregor.  相似文献   

10.
A new species of Caytonia, C. orientale, and a new genus and species Chankanella vachrameevi are described from Neocomian-Aptian coal bearing strata in the Primor'ye Territory, Suifun basin. The new species of Caytonia is differentiated from C. sewardii Thomas and C. canadensis (Berry) Bell on the basis of size and slight morphological variances. Only one specimen of a megasporophyll was available for study. Leaves found in the same stratum and attributed to the new species differ from other species of Sagenopteris chiefly in the greater length of the petioles of the leaflets. Chankanella vachrameevi is described as a Sagenopteris-like leaf. It differs from Sagenopteris in having a larger number of leaflets and in lacking anastomoses of veins in the leaflets. It is compared with Lesleva Lesquereux. Its leaflets are compared with Thinnfeldia pinnae, and the leaves of Tersiella Radczenko, Linquifolium and Protophyllocladus. — F. M. Hueber.  相似文献   

11.
The microstructure of the septa is examined for some genera of the Lykophyllidae. Two distinct types of microstructure can be recognized, enveloping lamellar microstructure in which the fibers parallel each other and the median part of the septum, and pinnate-fibrous microstructure in which the fibers diverge at an acute angle from the median part of the septum and are commonly arranged in bundles. The Lykophyllid corals have thick septa in the young stages but the thickening reduces with growth. Three patterns of such reduction of septal thickening can be recognized: 1) reduction proceeding from the counter quadrant to the cardinal quadrant; 2) reduction proceeding from the periphery towards the axis; 3) reduction proceeding from the cardinal quadrant towards the counter quadrant. The Lykophyllidae are divided into two subfamilies, the Lykophyllinae with enveloping lamellar microstructure and the Semaiophyllinae with pinnate-fibrous microstructure. The pattern of reduction of septal thickening is different for the two subfamilies. A new genus, Rukhinia (type species R. cuneata n. sp., Upper Llandoverian of the western margin of the Siberian Platform) is proposed and is closely related to Semaiophyllum Vollbrecht.—B.S. Norford  相似文献   

12.
《International Geology Review》2012,54(10):1858-1867
The foraminifer Tournayella Dain, 1953, formerly believed to be restricted to the Tournasian, is found in the upper part of the Frasnian, western Ural Mountain province. The Frasnianform is a subgenus of Tournayella and is here named T. (Eotournayella) jubra, n. sg., n. sp., monotypic. Eotournayella seems to be transitional from the ammodiscids to the tournayellids and to be ancestral to or to contain marks of characteristic structures in certain tournayellid stocks.—L.G. Henbest  相似文献   

13.
A new graptolite genus is described from lower Wenlockian rocks on the Molyud-Vozh river in the northwest Urals. Uralograptus closely resembles Cyrtograptus but lacks the spiral coiling of the main part of the rhabdosome. U. insuetus, the type species, was collected from the zone of Oktavites spiralis (Geinitz). --B.S. Norford.  相似文献   

14.
《International Geology Review》2012,54(10):1860-1863
Putrya describes the new species Streblus galicianus, S. mjatliukae, S. pseudobeccarii, and S. granulosus from upper Tortonian (Miocene) deposits in Ciscarpathia.—M. A. Buzas  相似文献   

15.
《International Geology Review》2012,54(12):2105-2114
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16.
《International Geology Review》2012,54(12):2115-2120
Two new species of Early Carboniferous colonial Rugosa discovered in collections from the western slopes of the Central Urals provide additional data on geographic ranges of Aulina and Paralithostrotion. Aulina kosvensis is the first fasciculate species of the genus to be described from the U. S. S. R. It was found in the Upper Viséan Ladeininskii horizon. Paralithostrotion talkaense is described on material from the Ladeininskii and Ust'sarbaiskii horizons and considered to be of upper Viséan(?) and Namurian age. In connection with this investigation, the type material of Paralithostrotion jermolaevi Gorskiy and Tschernowiphyllum podboriense Dobrolyubova, which are the type species of the two genera, was restudied and found to be congeneric. Tschernowiphyllum Dobrolyubova, 1958, is therefore a junior synonym of Paralithostrotion Gorskiy, 1938. As revised, Paralithostrotion is considered to be a doubtful lithostrotionid lacking a genuine columella and having tabulae that are concave to horizontal. The corallum is fasciculate with connecting processes, which open into a corallite at one end but at the other terminate blindly against a neighboring corallite. Two opposing septa are longer than the other majors and generally overlap in the axial region. The dissepimentarium is narrow and may not be developed. - H. Duncan.  相似文献   

17.
The author discusses the conceptual bases of the pelecypod family Allorismidae and of the Carboniferous genera Allorisma, Allorismiella, Edmondia, Edmondiella, and Pseudedmondia. There is an extensive discussion of the hinge line structures of Allorisma based on Russian specimens, and four species of the genus from the Carboniferous of the Moscow area are described. Astaf'yeva-Urbaitis overlooked Wilson's 1959 paper in which Allorisma was shown to be a junior synonym of Edmondia; as a result Astaf'yeva-Urbaitis' nomenclature is faulty. Wilson replaced Allorisma with the new generic name Wilkingia. — J. Pojeta, Jr.  相似文献   

18.
《International Geology Review》2012,54(10):1847-1854
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19.
Tabulate corals, including new species of Cyrtophyllum (C. elegantum, C. altaicum, C. vulgaris), Propora (P. proheliolitoides), and Plasmoporella (P. altaica) aid in defining Upper Ordovician strata of Gornyy Altay region; in addition, new species of Heliolites (H. pachycanaliculoides), Favosites (F. karagemensis), Pachyfavosites (P. bazhenovae), Squameofavosites (S. karagemensis, S. altaicum), and Hexismia (H. asiatica) form part of a rich Late Silurian fauna within the same region.—T. E. Bolton  相似文献   

20.
A new genus of terrestrial gastropod Badchisestis and three included species are described and assigned to the Cyclophoridae. Badchisestis cupaeformis, B. piriformis and the type species B. digitulus all come from the Middle Eocene, Alayan series of Badkhyz, southeast Turkmenia, in the region of Mt. Chakmaly-Chonga. Korobkov's diagnosis of the genus is as follows: Shells of medium (30 mm) to considerable (60 mm) size, elongate-ovate, dolioform, pyriform or oval-digitiform, consisting of six to nine slightly convex, low whorls, separated by a distinct surface suture. Height of last whorl 1;3, 2/5 or 1;2 the height of the whole shell. Aperture comparatively small, broader than high, in the form of a slightly truncated broad oval, angular in the parietal part, with a sulcus in the sutural angle. Peristomatal margins thickened and turned back towards the dorsal surface. Pseudo-umbilicus, narrow not fringed. Outer surface with oblique, converging slender riblets. — N. F. Sohl.  相似文献   

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