Ichthyofauna from the Key Sections of the Middle and Upper Permian of Eastern Europe: Complexes and Zonal Scale. Paper 1: Basin of the Severnaya Dvina River

2018 ◽  
Vol 18 (3) ◽  
pp. 184-193
Author(s):  
A. V. Minikh ◽  
◽  
M. G. Minikh ◽  
Keyword(s):  
Eastern Europe ◽  
Upper Permian ◽  
Zonal Scale ◽  
Middle And Upper Permian

scholarly journals Croonian lecture : The origin of mammals

1913 ◽  
Vol 87 (592) ◽  
pp. 87-88
Keyword(s):  
Single Case ◽  
Lower Jurassic ◽  
Upper Permian ◽  
Occipital Condyle ◽  
Steady Increase ◽  
Lower Permian ◽  
Secondary Palate ◽  
Middle And Upper Permian ◽  
Higher Types ◽  
Evolution Of Mammals

An endeavour is made to trace the evolution of mammals from Cotylosaurian ancestors through the carnivorous Therapsida. In Upper Carboniferous times the line probably passed through some primitive generalised Pelycosaurs; in Lower Permian through primitive, probably Therocephalian, Therapsids. In Middle and Upper Permian the line passed through the Gorgonopsia. In Triassic times the mammalian ancestors were small generalised Cynodonts. In Lower Jurassic the mammals are so Cynodont-like, and the Cynodonts so mammal-like, that in no single case are we absolutely certain which is which. In the Therocephalia, the Gorgonopsia, and the Cynodontia, the skull is very mammal-like. The zygomatic arch is, as in mammals, formed by the jugal and the squamosal. The teeth are divided into incisors, canines and molars. In the later Gorgonopsians there is an imperfect secondary palate; in Cynodonts a complete secondary palate as in mammals. In Permian Therapsids there is a single occipital condyle; in the Triassic Cynodonts there may he a single condyle slightly divided or two exoccipital condyles. There is, on passing from earlier to later types, a steady increase in the size of the dentary and decrease in the size of the other elements of the jaw. The quadrate also becomes much reduced in the higher types. In Gorgonopsians and probably all earlier types the arch of the atlas is a pair of bones; in Cynodonts, as in mammals, there is a single arch.

Inozoan calcareous Porifera from the Permian reefs in South China

1989 ◽  
Vol 63 (6) ◽  
pp. 778-800 ◽  
Author(s):  
J. Keith Rigby ◽  
Fan Jiasong ◽  
Zhang Wei
Keyword(s):  
South China ◽  
Growth Form ◽  
Carbonate Platform ◽  
Upper Permian ◽  
General Nature ◽  
Late Paleozoic ◽  
Changxing Formation ◽  
Middle And Upper Permian ◽  
Eastern Sichuan

Inozoans are described from patch reefs on the carbonate platform of eastern Sichuan, from the uppermost Permian Laolongdong reefs in the Changxing Formation (Kazanian–Tatarian) at Beipei, northwest of Chongqing, and from Middle and Upper Permian reefs from the Maokou (Kungurian), Wujiaping (Ufimian), and Changxing Formations at Xiangbo, Longlin County, in northwestern Guangxi. Classification of inozoans, particularly late Paleozoic ones, is still in a state of flux, but genera recognized to date can be keyed using the general nature of the spongocoel, canals, and growth form.New genera described are Intratubospongia, Grossotubenella, Cavusonella, and Radicanalospongia. The new species described are Stellispongia radiata, S. minor, Peronidella beipeiensis, P. regulara, P. parva, Intratubospongia typica, I. tenuiperforata, I. multisi-phonata, I. minima, Grossotubenella parallela, Cavusonella caverna, and Radicanalospongia normala. A Corynella that is not identifiable to species and a sphinctozoan-like inozoan(?) sp. A that has a fibrous-appearing internal skeleton but is poorly preserved are also described. Inozoans and other sponges are major frame-builders in the Permian reefs of South China and our fauna is one of the most diverse late Paleozoic assemblages described to date.

Fossil insects of the middle and upper Permian of European Russia

2013 ◽  
Vol 47 (7) ◽  
pp. 641-832 ◽  
Author(s):  
D. S. Aristov ◽  
A. S. Bashkuev ◽  
V. K. Golubev ◽  
A. V. Gorochov ◽  
E. V. Karasev ◽  
...  
Keyword(s):  
European Russia ◽  
Upper Permian ◽  
Fossil Insects ◽  
Middle And Upper Permian

Red paleosols in the key sections of the Middle and Upper Permian of the Kazan Volga region and their paleoclimatic significance

2015 ◽  
Vol 49 (10) ◽  
pp. 1150-1159 ◽  
Author(s):  
F. A. Mouraviev ◽  
M. P. Arefiev ◽  
V. V. Silantiev ◽  
N. M. Khasanova ◽  
N. M. Nizamutdinov ◽  
...  
Keyword(s):  
Volga Region ◽  
Upper Permian ◽  
Middle And Upper Permian ◽  
Paleoclimatic Significance

“Hydrozoa” from Middle and Upper Permian reefs of South China

1991 ◽  
Vol 65 (1) ◽  
pp. 45-68 ◽  
Author(s):  
Fan Jiasong ◽  
J. Keith Rigby ◽  
Zhang Wei
Keyword(s):  
New Species ◽  
South China ◽  
Southern China ◽  
Upper Permian ◽  
New Genera ◽  
Frame Building ◽  
Upper Paleozoic ◽  
Middle And Upper Permian ◽  
Eastern Sichuan ◽  
Western Hubei

Abundant “hydrozoans” are important frame-building and accessory organisms in Middle and Upper Permian reefs of southern China, particularly in western Hubei, eastern Sichuan, eastern Yunnan, and northwestern Guangxi. The new genera Radiotrabeculopora, Lichuanopora, and Pseudopalaeoaplysina are described, as are the new species Disjectopora beipeiensis, D. irregulara, Radiotrabeculopora xiangoboensis, R. maokoui, R. elegans, R. reticulata, R. astrorhiza, Balatonia robusta, Lichuanopora bancaoensis, L.(?) regulara, Pseudopalaeoaplysina sinensis, and P. major. The assemblage represents one of the most diverse upper Paleozoic “hydrozoan” assemblages known.

Sign in / Sign up

Export Citation Format

Share Document