Fossil insects of the middle and upper Permian of European Russia

Fossil insects of European Russia from the Urzhumian to Vyatkian stages are reviewed, new taxa are described, and dynamics of insect taxonomic diversity around the Permian-Triassic boundary in light of the Paleozoic-Mesozoic boundary global extinction problem is analyzed. Traces of interactions between arthropods and plants are analyzed. Insect-bearing deposits of the Late Paleozoic found in the northern and eastern areas of the East European Platform are unique on the global scale in their completeness and continuity, allowing us to trace especially comprehensively the biotic processes that occurred around the boundary described as the time of the greatest biotic catastrophe of the Phanerozoic. A total of 28 genera and 111 species are newly described. Within the range from the Urzhumian to the Permo-Triassic boundary, 15 representative successive assemblages, including 112 families, are recognized (seven in the area in question and eight in other regions of Asia, Australia, and Africa). New tools are developed for the analysis of the dynamics of diversity. These tools show an approximately equilibrium (slightly positive) dynamics in the Urzhumian and Severodvinian and a drop in diversity during the Vyatkian Age. It is shown that Permian insect assemblages acquired a substantially post-Paleozoic pattern much earlier than the end of the Paleozoic. The character of changes that took place in the Induan and Olenekian remains uncertain, but a large-scale extinction event did not occur here: most families that have not been recorded at the beginning of the Triassic are recorded again in the Middle and Upper Triassic. Nevertheless, a biotic crisis probably actually took place, but was reduced to reorganization of the biota’s structure, which provided enormous growth of biodiversity over subsequent hundreds of millions of years, rather than resulted in catastrophic extinction. This study is intended for entomologists, stratigraphers, and all readers interested in the biotic events that took place around the Permian-Triassic boundary.     

Revision of the family Epideigmatidae (Insecta: Grylloblattida)

The family Epideigmatidae is revised. New members of this family from the Lower Permian of Russia: Vilvaptera permyakovae, gen. et sp. nov. (Vilva locality, Artinskian Stage, Perm Region) and Tshekardeigma rasnitsyni, gen. et sp. nov. (Chekarda locality, Kungurian Stage, Perm Region) are described. Paraphenopterum unicolor Storozhenko, 1992 (Soyana locality, Kazanian Stage, Arkhangelsk Region) is redescribed. The family Stenoneuritidae is regarded as a synonym of Epideigmatidae; the genera Fayoliella Meunier, 1908 (Upper Carboniferous of France), Fabreciella Carpenter, 1934 (Upper Carboniferous of the USA), and Turbopterum Kukalová, 1964 (Lower Permian of the Czech Republic) are transferred to Epideigmatidae. Fabreciella allegheniensis Carpenter, 1934 is synonimized under F. pennsylvanica Carpenter, 1934.     

New insects (Insecta: Mecoptera,Grylloblattida) from the Middle Permian Chepanikha locality,Udmurtia

New scorpionflies, Asiachorista europaea sp. nov. and Petromantis udmurtica sp. nov. (Mecoptera: Permochoristidae), and new grylloblattids, Tshepanichoptera lacera gen. et sp. nov. (Grylloblattida: Aliculidae) and Miralioma urzhumica sp. nov. (Liomopteridae), are described from the Urzhumian of Udmurtia (Chepanikha locality). Liomopterites novissimus Aristov, 2004 (Liomopteridae) is redescribed.     

New and little-known Eoblattida (Insecta) from the Paleozoic of Russia

New taxa of the insect order Eoblattida from the Upper Carboniferous of Russia are described, including Narkemina kata sp. nov., Narkeminopsis inversa sp. nov., Carbonokata storozhenkoi gen. et sp. nov., Tshunoptera ampla gen. et sp. nov., and Evenkiophlebia collucata gen. et sp. nov. from the Chunya locality (Krasnoyarsk Region), Narkemulla sibirica gen. et sp. nov. from the Chunya and Izykhskie Kopi localities, Khakassia (all Cnemidolestidae), and Izykhia tridentis gen. et sp. nov. from Izykhskie Kopi (?Spanioderidae). Narkeminuta permiana gen. et sp. nov. (Cnemidolestidae) is described from the Kedrovka locality (Kemerovo Region; Lower Permian), and Issadische maximum gen. et sp. nov. (Eoblattida incertae familiae) is descriobed from the Isady locality (Vologda Region; Upper Permian). Permeoblatta borealis Rasnitsyn et Aristov, 2010 (Idelinellidae) from Isady is redescribed.     

A new species of Plesioblattogryllus Huang, Nel et Petrulevičius (Grylloblattida: Plesioblattogryllidae) from the Middle Jurassic of China

A new species of grylloblattid insects, Plesioblattogryllus minor, sp. nov. (Gryllobattida: Plesioblattogryllidae), is described from the Middle Jurassic Daohugou locality (Inner Mongolia, China). The value of the diagnostic features of the families Plesioblattogryllidae and Blattogryllidae is briefly discussed.     

Paleontological Characterization of the Triassic Deposits of the Korotaikha Depression (Northern Cis-Urals)

Paleontological Journal - The revised and new paleontological data on tetrapods and insects from the Triassic stratons of the Korotaikha Depression are given. A new species of cockroaches (family...     

A new family of the order Grylloblattida (Insecta) from the Middle Permian of Russia

A new family, Ivapteridae fam. nov. (Insecta; Grylloblattida), is described from the Middle Permian locality of Soyana (Arkhangelsk Region; Kazanian Stage). It is most similar to Sojanoraphidiidae O. Martynova, 1952, differing from it in the subcostal field being traversed in the basal half of the wing by long, curved, and strongly oblique crossveins that form a double row of cells, the base of CuA being free, and CuA₁ thin compared to CuA₂. The new family is represented by a single species, Ivaptera sharovi, gen. et sp. nov. An overview of the modern system of the order Grylloblattida is included.     

New Grylloblattida (Insecta) from the Upper Permian and Lower Triassic of European Russia and Kazakhstan

New grylloblattid insects are described from the Upper Permian and Lower Triassic of European Russia and Kazakhstan: Kuplya minutissima gen. et sp. nov. (Tshekardominidae) from the Severodvinian locality Novo-Aleksandrovka (Orenburg Region); Parachauliodites orthopteroides gen. et sp. nov. (Chaulioditidae), Permofossilis commasticatus gen. et sp. nov. (Permotermopsidae), Megakhosarodes tensilis sp. nov. (Megakhosaridae), and Baharellinus dilaceratus sp. nov. (Blattogryllidae) from the Severodvinian locality Isady (Vologda Region); Dvinopedes salariovensis gen. et sp. nov. (Chaulioditidae) from the Vyatkian locality Aristovo (Vologda Region); Klyazmia karasevi gen. et sp. nov. (Chaulioditidae) from the Vyatkian locality Sokovka (Vladimir Region); Megakhosarodes borealis sp. nov. (Megakhosaridae) from the Vyatkian locality Balymotikha (Vladimir Region); Sigmophlebia rugulosa sp. nov. (Tshekardominidae) from the Upper Permian locality Karaungir (East Kazakhstan Province); and Chauliodites kitshmengensis sp. nov. and C. nedubrovensis sp. nov. (Chaulioditidae) from the Induan locality Nedubrovo (Vologda Region).