Nikolay Zverkov

Nikolay Zverkov
Russian Academy of Sciences | RAS

PhD

About

61
Publications
18,918
Reads
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378
Citations
Additional affiliations
September 2018 - present
Russian Academy of Sciences
Position
  • Researcher
November 2017 - present
Russian Academy of Sciences
Position
  • Researcher
April 2017 - August 2018
Russian Academy of Sciences
Position
  • Senior Laboratory Assistant
Education
October 2018 - November 2021
Lomonosov Moscow State University
Field of study
  • Palaeontology
October 2016 - June 2018
September 2012 - June 2016

Publications

Publications (61)
Article
Pliosaurid marine reptiles played important roles in marine food chains from the Middle Jurassic to the middle Cretaceous, frequently as apex predators. The evolution of pliosaurids during the later parts of the Early Cretaceous has recently been illuminated by discoveries from Russia (Hauterivian) and Colombia (Barremian). However, knowledge of pl...
Article
Recent study of ophthalmosaurid ichthyosaurs has brought us a number of new taxa; however, the validity of several ophthalmosaurid taxa from the Volgian (Tithonian) of European Russia still remains unclear, complicating comparisons and in some cases affecting taxonomic decisions about new contributions. A revision of the type series of all three sp...
Article
Full-text available
The ichthyosaur genus Arthropterygius Maxwell, 2010 is considered as rare and poorly known. However, considering the existing uncertainty regarding its position in respect to ophthalmosaurid subfamilies in recent phylogenies, it is among the key taxa for understanding the evolution of derived Late Jurassic and Early Cretaceous ichthyosaurs. Recentl...
Article
Full-text available
The Late Jurassic ichthyosaur Nannopterygius is among the poorest known, with the only skeleton, NHMUK PV 46497, on display in the Natural History Museum, London and, therefore, difficult to access. This holotype specimen is here reassessed. The newly obtained data have enabled the identification of several additional specimens of Nannopterygius in...
Article
The first ichthyosaurian specimens discovered from the Upper Triassic of the Russian Arctic (Kotelny Island, New Siberian Islands) are described herein. They include the remains of large-to small-bodied ichthyosaurians originating from six stratigraphic levels spanning the lower Carnian to middle Norian. The material is mostly represented by isolat...
Article
Here we report the first ichthyosaurian finds from the Valanginian and Hauterivian of Austria. Based on their tooth morphology, they represent two distinct taxa with probably different feeding ecologies. The Valanginian specimen is a small tooth with a small crown and bulbous root, similar to teeth of Nannopterygius and Sisteronia - it likely was a...
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
A new specimen of the Early Cretaceous pterodactyloid pterosaur Istiodactylus latidens is described. This specimen in the Moscow Vernadsky State Geological Museum represents the associated anterior ends of the rostrum and mandibular symphysis but lacks collection data. It likely comes from the Barremian-Aptian Vectis Formation of southern England b...
Article
Marine reptile occurrences are rare in the Lower Jurassic Series outside of Europe. Here we describe diverse marine reptile faunas from the Lower Jurassic Series (Pliensbachian and Toarcian stages, including the Toarcian–Aalenian boundary interval) of Eastern Siberia. The taxonomic composition of Toarcian marine reptile assemblages of Siberia highl...
Article
Full-text available
An abundant collection of bivalves, belonging to the stratigraphically important genus Retroceramus, has been described for the first time from the Bajocian‒Bathonian beds of the Timan-Pechora region, exposing along the Izhma River and its right tributary, the Dreshchanka River. Totally 7 taxa were found, among which 4 were identified to a species...
Article
Recent progress in the study of Cretaceous ichthyosaurians resulted in significant reevaluation of their diversity. However, there are still problematic mid-Cretaceous ichthyosaurian taxa, among which are ‘Ophthalmosaurus’ cantabrigiensis Lydekker, 1888 from the upper Albian – lower Cenomanian of England, Maiaspondylus lindoei Maxwell & Caldwell, 2...
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
The first pliosaurid finding in Austria is described from a Lower Cretaceous (Hauterivian) pelagic to hemipelagic limestone succession of the Northern Calcareous Alps (Bajuvaric Langbath Zone). The isolated tooth crown originates from the upper Hauterivian Balearites balearis Zone (Balearites angulicostatus Subzone). The finding sheds light on the...
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
Recent study of ophthalmosaurid ichthyosaurs has brought us a number of new taxa, however, the validity of several ophthalmosaurid taxa from the Volgian (Tithonian) of European Russia still remains unclear, complicating the comparisons and in some cases affecting taxonomic decisions of new contributions. A revision of the type series of all three s...
Article
Full-text available
A detailed description of the section of the Middle Jurassic terrigenous deposits exposed on the Yarenga River, Arkhangelsk Region, is provided. The section represents a new locality of fossil remains of Jurassic marine reptiles. Among them, the postcranial elements of the plesiosaur Muraenosaurus dominate. Pliosaur and ichthyosaur finds, each repr...
Conference Paper
Full-text available
Here we describe plesiosaur remains from Glebovo section, Yaroslavl Region. Although the specimens were found non in situ they are likely Early Cretaceous, Valanginian, in age. One cervical centrum is referable to Elasmosauridae – this is the first find of an elasmosaurid plesiosaur in the Valanginian of Russia.
Conference Paper
Full-text available
Pliosaurid plesiosaurians played important roles in marine food chains from the Middle Jurassic to the mid Cretaceous, frequently as apex predators. All hitherto described pliosaurid species of the Kimmeridgian to the Hauterivian possess trihedral and subtrihedral teeth with a smooth labial surface, while Aptian–Turonian pliosaurids have exclusivel...
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...
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...
Chapter
Full-text available
Here we report the first find of marine reptile tooth crown from the Upper Jurassic (Middle to Upper Oxfordian) of Crimean Mountains near Yalta. The crow is slender and circular in cross section; it is ornamented by fine longitudinal ridges by its entire circumference. This crown likely belongs to a plesiosaur, however, it also shows similarities t...
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
Zverkov, N.G., Averianov, A.O. & Popov E.V., April 2017. Basicranium of an elasmosaurid plesiosaur from the Campanian of European Russia. Alcheringa March. ISSN 0311-5518 The braincase of elasmosaurid plesiosaurs is poorly known. Here, we describe the exceptionally well-preserved elasmosaurid basicranium from the Rybushka Formation (lower Campanian...
Conference Paper
Full-text available
The limbs of marine reptiles lack some function and characteristics essential for most amniotes: they do no more support body weight in terrestrial conditions but are modified into fins to steer or stabilize underwater motion, and into flippers , primary propulsive organs. Thereby their structure was partially reorganized in order to serve new func...
Conference Paper
Full-text available
The braincase of elasmosaurid plesiosaurs is poorly known despite numerous relatively complete and well-studied skeletons. Thereby a new find of an elasmosaurid basicranium from the Rybushka Formation (mid-Campanian) of Saratov Region, Russia, is of great interest. The specimen, attributed to an elasmosaurid plesiosaur, possess an elongated plate-l...
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....
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
For the first time a specimen referred to Pliosaurus is described from the Lower Cretaceous (Lower Valanginian), represented by a single tooth from Mount Sheludivaya in Crimea. This specimen demonstrates that two pliosaurian lineages crossed the Jurassic – Cretaceous boundary: the typically Cretaceous subfamily Brachaucheninae Benson et Druckenmill...
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...
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
Full-text available
Дан краткий обзор истории изучения, систематики и образа жизни ихтиозавров — необычных морских рептилий мезозоя. // The brief review of history of studying, systematics and habitats of ichthyosaurs, uncommon marine reptiles of Mesozoic is given.

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Projects (4)
Project
The Early Jurassic was punctuated by several events of severe environmental change, which included geologically rapid climate oscillations and carbon cycle perturbations. Most of these events, however, have been exclusively documented in sediments deposited at mid to low paleo-latitudes. In the absence of available data from high paleo-latitudes, their global nature thus remains questionable. We anticipate that our project will allow establishing reference records of temperature and salinity changes in Siberia and NE Russia, which will shed a long overdue Arctic perspective on the amplitude, likely causes and consequences of the growingly studied Early Jurassic climate changes. Such empirical constraints might also help improving the calibration of climate models under high atmospheric CO2 concentrations.
Project
Collect and share information on the Jurassic-Cretaceous "transition" (around Berriasian times) in order to follow up with the discussion on the (re-)location of the system boundary (base Berriasian /Kilian view/, base Valanginian /Oppel view/, or any other option) a fair and open discussion initiated on the occasion of JK2018. Are you interested to join as "collaborators" ? then: ● option 1: register as "followers" of both the project and Bruno Granier --no necessarily on the long term!-- (and you will be added to the list); ● option 2: send your contact information (i.e., your email address) to Prof. Bruno Granier, Brest (Université de Bretagne Occidentale). Would you like to leave the project ... let him know (and that should be promptly fixed). PLEASE do not register as follower if you are not willing to be a collaborator!
Project
The goal of this project is a revision of the Late Jurassic ichthyosaurs of the Northern Hemisphere with the special reference to taxa from the Upper Jurassic (Volgian/Tithonian) of European Russia that were erected at the end of the previous century (Arkhangelsky 1997, 1998, 2001b; Efimov 1998, 1999a, b), however, the majority of them was soon regarded as subjective junior synonyms of better-known taxa from Western Europe (Maisch & Matzke 2000; McGowan & Motani 2003).