Maxim Savvich Arkhangelsky

Maxim Savvich Arkhangelsky
Saratov State University · Geological

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83
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September 1998 - present
Saratov State University
Position
  • Professor

Publications

Publications (83)
Article
Here we determine the individual age of a basal mosasaur (subfamily Halisaurinae) using zyga-pophyseal skeletochronology. This study is based on the cervical vertebra from the Late Cretaceous Beloe Ozero locality (Saratov Region). By of counting the zygapophyseal growth rings on the right prezygapophy-sis, it has been revealed that the age of the a...
Article
Для определения индивидуального возраста базального мозазаврида (представителя подсемейства Halisaurinae) из позднемелового местонахождения Белое Озеро (Саратовская область) по шейному позвонку был использован метод зигапофизной скелетохронологии. В результате подсчета зигапо-физных ростовых гребней на правом переднем сочленовном отростке было уста...
Article
Full-text available
The assemblage of fossil fish from of the Campanian deposits (Upper Cretaceous) in the locality Beloe Ozero consists of representatives of 20 taxa, of which 15 are common with North America. This confirms the assumption about a free mutual exchange between the European and North American marine ichthyofauna at the end of the Cretaceous period.
Article
Full-text available
A diverse fish paleofauna occurs in the upper Campanian portion of the Rybushka Formation exposed near Saratov city in the Saratov Oblast, Russia. Twenty taxa have been identified, including two holocephalans (Ischyodus bifurcatus and Amylodon karamysh), twelve elasmobranchs (Synechodus sp., Cederstroemia sp., Cretalamna cf. C. borealis, C. cf. C....
Article
Full-text available
The Campanian Beloe Ozero locality within the Rybushka Formation in Saratov Province, Russia, produces numerous isolated bones of sea turtles (clade Pan-Chelonioidea) identified as belonging to Protostega gigas, a giant protostegid, previously reliably known only from the Coniacian – Campanian of North America, and Pan-Chelonioidea indet. The Proto...
Article
Plesiosaurian marine reptiles evolved a wide range of body shapes during the Jurassic and Cretaceous, including long-necked forms. Many Late Cretaceous members of the clade Elasmosauridae epitomized this part of the plesiosaurian morphological spectrum by evolving extremely long necks through somitogenesis (resulting in an increase in the number of...
Article
Full-text available
Первая находка птерозавра в России была сделана в 1911 г. в верхнем мелу Пензенской области. Найденный фрагмент шейного позвонка (го лотип Bogolubovia orientalis) относили последовательно к представителям птеранодонтид и аждархид. Новые находки в верхнем мелу Саратов ской обл. позволили установить одновременное существование двух таксонов птероза...
Article
Full-text available
The Campanian Beloe Ozero locality within the Rybushka Formation in Saratov Province, Russia, is one of the richest and most diverse Upper Cretaceous pterosaur localities in Europe. It produces identifiable remains of Pteranodontidae indet. and Azhdarchidae indet., as well as bones which can be attributed to either of these groups. The pteranodonti...
Article
Plesiosaur specimens from the Upper Jurassic of European Russia are mainly referable to the genus Colymbosaurus Seeley, 1874, based on elongated propodials with extensive posterodistal expansion, and relatively short mid-cervical vertebrae. However, a historical specimen described by Bogolubov (1911) and subsequently revised as Plesiosauria indet....
Article
Full-text available
All current data on the Jurassic and Cretaceous climates of Siberia based on isotope, paleontological, and lithological proxies are summarized. The late Pliensbachian cooling episode, early Toarcian warming, promptly replaced by long-term Middle Jurassic cooling at the end of the Toarcian, and a long-term warm interval in the Late Jurassic are clea...
Preprint
Ophthalmosaurinae is a recently recognized clade of derived ichthyosaurs (marine reptiles) ranging from the Bajocian (Middle Jurassic) to the late Albian (late Early Cretaceous). Whereas the Middle-Late Jurassic ophthalmosaurine Ophthalmosaurus is often regarded as a hyperspecialized deep diver, very little is known about the anatomy, evolutionary...
Preprint
The ichthyosaur fossil record is interspersed by several hiatuses, notably during the Cretaceous. This hampers our understanding of the evolution and extinction of this group of marine reptiles during the last 50 million years of its history. Several Cretaceous ichthyosaur taxa named in the past have subsequently been dismissed and re- ferred to th...
Preprint
A new ophthalmosaurid ichthyosaur, Sveltonectes insolitus, gen. et sp. nov., is described from a sub-complete and three-dimensionally preserved specimen from the late Barremian of western Russia. This new taxon is supported by 11 cranial, dental, and postcranial autapomorphies, and is also characterized by features previously considered as autapomo...
Article
Full-text available
An incomplete skeleton of the ichthyosaur Ophthalmosaurus icenicus Seeley, 1874 excavated in the Oxfordian-Kimmeridgian beds south of the town of Syzran (Samara Region) is described. Members of the genus Ophthalmosaurus are characterized by a unique combination of characters, most of which are well-pronounced in the specimen described here: the ext...
Data
Описан неполный скелет ихтиозавра Ophthalmosaurus icenicus Seeley, 1874, обнаруженный в оксфордско-кимериджских отложениях южнее г. Сызрани (Самарская область). Представители рода Ophthalmosaurus характеризуются уникальной комбинацией признаков скелета, бóльшая часть из которых выражена у описываемого экземпляра: basioccipitale с редуцированной, но...
Conference Paper
Full-text available
Here we describe incomplete plesiosaur skeleton from the Upper Santonian of Saratov Region (Russia), referable to Polycotylidae Williston, 1908. Hitherto remains of polycotylids from Saratov Region were known only from the Cenomanian, Campanian and Maastrichtian deposits. Polycotylid skeleton was found earlier in the Santonian deposits of Penza reg...
Conference Paper
Full-text available
Here we describe a history of the discovery of the skull of ichthyosaur Pervushovisaurus bannovkensis Arkhangelsky, 1998 in the Cenomanian deposits near Nizhnaya Bannovka village, Krasnoarmeysk district, Saratov region (Russia).
Conference Paper
Full-text available
Estudios paleontológicos recientes han incrementado no sólo el número de taxa de ictiosaurios, sino también el conocimiento sobre su disparidad ecomorfológica, distribución latitudinal y el rango de tamaño del grupo. Uno de los más diversos y dispersos grupos es Ophthalmosauridae, un clado Jurásico y Cretácico de ictiosaurios parvipelvianos que se...
Chapter
Full-text available
Marine reptile remains from the Jurassic of Moscow area were at first described in the year 1845, since then considerable materials from the Callovian, Oxfordian and Volgian (Tithonian) strata were accumulated. Here we review all available Jurassic marine reptile materials from Moscow area stored in museums and private collections. Callovian marine...
Article
Plesiosaurs were the longest-surviving group of secondarily marine tetrapods, comparable in diversity to today’s cetaceans. During their long evolutionary history, which spanned the Jurassic and the Cretaceous (201 to 66 Ma), plesiosaurs repeatedly evolved long- and short-necked body plans [1,2]. Despite this postcranial plasticity, short-necked pl...
Article
A proximal humerus fragment referred to as Azhdarchidae indet. from the Rybushka Formation (Upper Cretaceous, Lower Campanian) of the Beloe Ozero locality in Saratov Region is described. The prox� imal articular surface is not saddle�shaped, has a weakly convex profile in the frontal section. The most pos� teriorly projecting part of the proximal a...
Article
Despite their profound adaptations to the aquatic realm and their apparent success throughout the Triassic and the Jurassic, ichthyosaurs became extinct roughly 30 million years before the end-Cretaceous mass extinction. Current hypotheses for this early demise involve relatively minor biotic events, but are at odds with recent understanding of the...
Data
Phylogeny-reconstructed character-taxon nexus for morphospace analysis
Data
Results of the generalised least square tests
Data
Supplementary Figures 1-19, Supplementary Tables 1-19, Supplementary Note 1, Supplementary Methods and Supplementary References
Data
Nexus file for the constrained Bayesian analysis
Data
Ecological measurements used for the cluster dendrogram analysis
Data
Nexus file for the unconstrained Bayesian analysis
Article
Full-text available
Until recently, Tholodus, a rare ichthyosaur with spherical tooth crowns of the pressing–crushing type, has only been known from the Middle Triassic (Anisian) beds of Western Europe. A record of Tholodus remains in the Karazin Formation (Middle Anisian) of southern Primorye (Russian Far East) significantly expands the range of these reptiles.
Data
Full-text available
Tholodus – редкий ихтиозавр со сферическими коронками зубов давяще-дробящего типа, известный до недавнего времени лишь из среднетриасовых (анизийских) отложений Западной Европы. Находка остатков толодуса в отложениях каразинской свиты (средний анизий) Южного Приморья значительно расширяет известный ареал этих рептилий.
Article
Full-text available
The Upper Jurassic ichthyosaurs, characterized by the intermedium/humeral contact are known from several localities in Europe and North America. However, they are often described either briefly, or based on fragmentary material, resulting in a taxonomic tangle in most overviews. Grendelius McGowan, 1976 was previously synonymized with Brachypterygi...
Article
Full-text available
During the Middle and Late Jurassic, pliosaurid plesiosaursevolved gigantic body size and a series of craniodental adaptations that have been linked to the occupation of an apex predator niche. Cretaceous pliosaurids (i.e. Brachaucheninae) depart from this morphology, being slightly smaller and lacking the macrophagous adaptations seen in earlier f...
Data
Supplementary material. Includes: pictures of a bivalve associated with YKM 68249/1-10, stratigraphic age data for all taxon incorporated in the phylogeny, revised phylogenetic coding for Anguanax zignoi, additional figures of strict consensus topologies, detailed results from the ancestral state reconstruction and R scripts. -Nexus files. With cha...
Article
Full-text available
A jaw fragment of the rare ichthyosaur Tholodus is found for the first time in the Middle Triassic deposits of the Karazin Formation (South Primorye, Russian Far East). An analysis of the cephalopod systematics (Acrochordiceras kiparisovae Zharnikova, A. korobkovi Zharnikova, Acrochordiceras pacificum (Zharnikova), Stenopopanoceras? russkiense sp....
Data
Full-text available
Описана лобная кость мозазавра Clidastes propython из местонахождения Белое Озеро в Саратов􏰀 ской обл. (верхний мел, кампанский ярус, рыбушкинская свита). От лобных костей прочих предста􏰀 вителей рода Clidastes изученный экземпляр отличается ровными боковыми флангами. Ранее до􏰀 стоверные находки представителей рода Clidastes за пределами Америки бы...
Conference Paper
Full-text available
Here we describe a specimen from the Lower Callovian of Kostroma region, referable to the short‐snouted pliosaurian genus Simolestes Andrews, 1909. This finding expands geographic distribution of the genus Simolestes, and deepens our understanding of the Callovian herpetofauna of the Russian Sea, which was apparently similar to that of Western Euro...
Conference Paper
Full-text available
Here we gave a brief description of an ichthyosaurian remains from the Lower Valanginian of the European Russia (Kirov region) referable to the family Ophthalmosauridae Baur, 1887. The record of ichthyosaurs from the Berriasian–Barremian interval is extremely limited so even fragmental remains are of great interest. This finding confirms the assump...
Article
Full-text available
A frontal of the mosasaur Clidastes propython from the Beloe Ozero locality in the Saratov Region (Rybushka Formation, Campanian Stage, Upper Cretaceous) is described. The investigated specimen differs from the frontals of other members of the genus Clidastes in the relatively straight lateral flanks. Reliable records of Clidastes outside America h...
Conference Paper
Full-text available
During the Late Jurassic, important palaeogeographic events occurred in Eurasia, North America and Gondwana. Continental rift, subduction and orogeny produced different levels of marine inundation of terrestrial systems, with rising sea level. Shallow epicontinental seaways started to separate North America from Eurasia, Gondwana, and also between...
Article
Full-text available
Rhomaleosaurid plesiosaurians were a common and ecologically significant component of Early Jurassic marine faunas, primarily as large-bodied predators. They declined in abundance and made their last fossil appearance in the Middle Jurassic. However, the geographic pattern of rhomaleosaurid extinction has thus far been obscured by spatial bias in t...
Article
Full-text available
An ichthyosaurian skeletal remains assigned to the genera Arthropterygius and Ophthalmosaurus are described from the Volgian deposits of the Komi Republic and Nenets Autonomous Region (Okrug) (Russia). These specimens along with findings from Svalbard provide an opportunity to draw some preliminary conclusions on the distribution of ichthyosaurs du...
Article
Full-text available
A new species of ichthyosaur genus Undorosaurus from the Volgian stage of Moscow is described based on an incomplete forelimb. It differs from congeners basically in the form and position of pisiforme. With the application of cladistic method the phylogenetic position of two genera Undorosaurus and Paraophthalmosaurus in the system of Ichthyosaurid...
Conference Paper
Full-text available
Tholodus is rare ichthyosaur with durophagous dentition, until recently known only from the Anisian deposits of Western Europe. Finding of Tholodus remains in the Anisian deposits (Karazinskaya suite formation) of Primorsky Kray significantly expands our understanding of the area of distribution of these reptiles and confirms previously suggested a...
Article
The ichthyosaur fossil record is interspersed by several hiatuses, notably during the Cretaceous. This hampers our understanding of the evolution and extinction of this group of marine reptiles during the last 50 million years of its history. Several Cretaceous ichthyosaur taxa named in the past have subsequently been dismissed and referred to the...
Article
Full-text available
13-14th-century Juchid plated military belts with dragon images are considered in the article. Their study has shown that the tradition of wearing them had been borrowed by the Mongols from China together with corresponding imperial symbols, dragon images included. In the authors’ opinion, the images of these mythological creatures were used by bot...
Article
Full-text available
Ophthalmosaurinae is a recently recognized clade of derived ichthyosaurs (marine reptiles) ranging from the Bajocian (Middle Jurassic) to the late Albian (late Early Cretaceous). Whereas the Middle-Late Jurassic ophthalmosaurine Ophthalmosaurus is often regarded as a hyperspecialized deep diver, very little is known about the anatomy, evolutionary...
Article
Full-text available
A new ophthalmosaurid ichthyosaur, Sveltonectes insolitus, gen. et sp. nov., is described from a sub-complete and three-dimensionally preserved specimen from the late Barremian of western Russia. This new taxon is supported by 11 cranial, dental, and postcranial autapomorphies, and is also characterized by features previously considered as autapomo...
Article
Full-text available
A new elasmosaurid genus and species, Alexeyisaurus karnoushenkoi, from the Lower-Middle Norian (Wilczek Formation) of the Upper Triassic of the island of Wilczek Land (Franz Josef Land) is described based on an incomplete skeleton. The new form combines characters of typical late plesiosaurs and structural features unique to this form. It is proba...
Article
Full-text available
The premaxilla of a mosasauroid lizard from the Lysaya Gora 3 locality in Saratov (Upper Cretaceous, Cenomanian) is described. To date, the oldest known mosasaur remains have been dated Turonian. The premaxilla is most similar in morphology to that of Russellosaurus from the Turonian of the United States; however, the absence of sufficient diagnost...
Data
Описана предчелюстная кость мозазавроидной ящерицы из местонахождения Лысая гора 3 в Саратове (верхний мел, сеноман). Известные ранее наиболее древние находки мозазавров относились к туронскому времени. Предчелюстная кость морфологически наиболее близка к таковой Russellosaurus из турона США, однако отсутствие достаточного количества диагностически...
Article
Full-text available
A new azhdarchid genus and species, Volgadraco bogolubovi gen. et sp. nov., is described based on an anterior fragment of the mandibular symphysis (mandibular beak) and some postcranial elements from the Rybushka Formation (Upper Cretaceous, Lower Campanian) of the Shirokii Karamysh 2 locality, Saratov Region. The new taxon is intermediate in size...
Article
Full-text available
A new ichthyosaur, Platypterygius ochevi sp. nov., from the Albian-Cenomanian of the Voronezh Region is described based on a partial forefin. It differs from congeners in the very large facet for the lageniformis on the humerus.