首页 | 本学科首页   官方微博 | 高级检索  
相似文献
 共查询到20条相似文献，搜索用时 546 毫秒
1.
《International Geology Review》2012,54(10):1814-1821
Representatives of the bryozoan family Rhabdomesidae (the family name and derivatives, misspelled throughout the original version, are corrected in this translation), found in the Lower Kazanian deposits of the Russian Platform and the Upper Permian of the Little Caucasus and of Transcaucasia are described as new species of Rhabdomeson, Rhombopora, and Neorhombopora, n. gen. Rhombopora crassa Ulrich, 1884, from the Upper Carboniferous (Upper Pennsylvanian) of North America, is designated the type species of Neorhombopora, which is characterized by spiral budding in ihe axial zone and by the absence of megacanthopores. Although only three genera and four species of rhabdomesids are recognized in the Upper Permian of the Soviet Union, specimens are comparatively abundant, and the species seem to be good index fossils. Rhabdomeson noinskyi was identified from various localities in the Lower Kazanian of the Vyatka and Nemda river basins; Rhabdomeson floriforum occurs in the Upper Permian Gnishik suite at several localities in Transcaucasia; Rhornbopora ornata is known from the Lower Kazanian of Kirov and Arkhangel'sk Provinces, Komi ASSR; and Neorhombopora polita was found at one locality in the Lower Kazanian of Kirov Province.—H. Duncan  相似文献   

2.
《International Geology Review》2012,54(11):2066-2073
The Verbeekinidae originated in the Lower Permian with the genus Misellina of the subfamily Neoschwagerininae. The faMily divided in the Upper Permian into the subfamilies Pseudodoliolininae, Sumatrininae, Verbeekininae and the dubious Kahlerininae. The status of the genus Armenina M.-Maklay is discussed, and the genus retained; the genera Brevazina Schenck and Thompson and Paraverbeekina M.-Maklay are assigned to the synonymies of Misellina and Verbeekina respectively. — R. E. Grant.  相似文献   

3.
The late Paleozoic genus Praehorridonia and its type species is described, differing from Horridonia by presence of radial and concentric sculpture and by absence of spines on the brachial valve. The author believes the large Praehorridonia possessing traces of semireticulate structure, descended from the strongly semireticulate Antiquatonia in Middle Carboniferous and evolved into Horridonia, thus representing an intermediate stage between Antiquatonia and Horridonia. The family was confined to the Arctic throughout its history and became extinct in the middle of the Upper Permian. -- G. A. Cooper.  相似文献   

4.
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   

5.
The new fenestellid bryozoan family Fenestraliidae is proposed to include Fenestralia Prout and two new genera, Parafenestralia and Triznella, from the Upper Permian of the Russian platform. The new family is compared with the Polyporidae and the Fenestellidae and is thought to be more closely allied to the latter. Parafenestralia arborescens (Netschajew), Triznella permiana (Nikiforova), T. viatkensis (Nikiforova), and the new species T. formosa are described and illustrated.—J. Utgaard  相似文献   

6.
  相似文献   

7.
《International Geology Review》2012,54(10):1826-1839
The Oldhaminoidea are classified as a suborder of the Productida, on the basis of the new genus Spinolyttonia which has productid spines, and on other morphological considerations. The Transcaucasian oldhaminoids are described in support of this position, with detailed treatment of the genera Keyseriingina Tschernyschev, Leptodus Kayser, Oldhamina Waagen, Gubleria H. and G. Termier, Spinolyttonia Sarycheva (nov.), and Poikilosakos Watson. The Transcaucasian fauna is Upper Permian (Guadalupian and Dzhulfian).—R. E. Grant  相似文献   

8.
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   

9.
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   

10.
Ammonoids of early Upper Scythian age are described from three localities in the Northern Caucasus. No data on relative stratigraphic position is given, but some forms are common to the different exposures and the author concludes that all the ammonoids are Upper Scythian (Olenekian). Affinites with Pacific faunas are stressed and the faunules are correlated with the Owenites zone of North America. Two new genera (Parinyoites and Subowenites) and three new species (Dieneroceras caucasicum, Parinyoites ,mastykensis, Subovvenites slavini)are proposed. Flemingites pulcher Waagen, Wyomingites aplanatus (White), Parussuria compressa (Hyatt and Smith), and Owenites koeneni (Hyatt and Smith) are described and figured. Parinyoites differs from Metinyoites in having rounded saddles and it lacks the keel and costation of Inyoites. Subowenites has reticulate ornamentation, unlike Owenites, Parowenites, and Pseudowenites; it also lacks the adventive notches in the median saddle of Pseudowenites. --E. T. Tozer.  相似文献   

11.
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   

12.
《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   

13.
A collection of Pseudovermiporella Elliott, from the Upper Permian of Transcaucasia, was studied. History of previous studies of the genus is given, pointing out the variable systematic interpretations. In the present investigation, fertile structures are described and presented as evidence of algal affinity. Pseudovermiporella is tentatively assigned to Rhodophyta. -- S. H. Mamay.  相似文献   

14.
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   

15.
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   

16.
《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   

17.
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   

18.
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   

19.
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   

20.
《International Geology Review》2012,54(12):2105-2114
  相似文献   

设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号