L.P. Tatarinov's research while affiliated with Russian Academy of Sciences and other places
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Publications (30)
A.O. Kowalevsky was the first to examine in 1865–1867 the groups related to ancestors of vertebrates. They were represented
by lancelet (Branchiostoma) and tunicates (Ascidia). As Grobben (1908) divided metazoans which are more advanced than coelenterates into protostomes and deuterostomes, searching
for remote relatives of vertebrates was performe...
In many animal groups, rudimentary organs of adult organisms appear at early stages of egg cleavage, when there is no trace
of morphological differentiation. More than half a century ago, I. I. Schmalhausen developed a profound concept of integrity
of the organism in the course of development. He emphasized that mutual adaptation of organs is based...
The first steps in the formation of the middle ear of the mammalian type, with the tympanum and three auditory ossicles, have
only been passed by higher cynodonts. They have an incipient malleus, which developed from the anterior process of the articulare
rather than the retroarticular process, which is rudimentary in cynodonts. The tympanic bone i...
The phylogenetic system of Hennig, which was designed for classification of synchronous organisms, has only been adapted secondarily
to total reconstruction of phylogeny. All fields of fundamental biology are related to the development of evolutionary theory.
A better understanding of the origin of life requires new concepts of the historical geolo...
The tympanic membrane appeared in the evolution of archaic mammals, when the articulare had already lost its function in the
jaw articulation. Even earlier the quadrate and, then, the articular bone had acquired the role of additional auditory ossicles.
A new primitive whaitsiid therocephalian, Moschowhaitsia vjuschkovi, is described from the Vyaznika deposits (Upper Tatarian, Upper Permian), Vladimir Province, U.S. S. R. Moschowhaitsia is distinguished from other members of the family Whaitsiidae by the retention of a large number of cheek teeth. In its palate the, new genus embodies a nice combi...
In eukaryotes, in contrast to prokaryotes, phyletic lineages are usually quite distinct. Therefore, the best classifications
of eukaryotes are usually phylogeny-based. However, in many groups of organisms, higher rank taxa are based on horizontal
rather than phyletic groups or, more precisely, on groups of the mixed type. This is largely true for v...
In eukaryotes, in contrast to prokaryotes, phyletic lineages are usually quite distinct. Therefore, the best classifications of eukaryotes are usually phylogeny-based. However, in many groups of organisms, higher rank taxa are based on horizontal rather than phyletic groups or, more precisely, on groups of the mixed type. This is largely true for v...
The progress of molecular genetics principally changed the views on heredity and, in the long run, wrecked the synthetic theory of evolution, designed for the microevolutionary processes in populations only. Molecular genetics as a whole is sufficient for analyzing evolutionary processes in viruses and prokaryotes. But in multicellular organisms, w...
My studies at the Biological Faculty of Moscow State University were particularly influenced by R.L. Berg, Academician I.I.
Schmalhausen, Professors B.S. Matveev and V.G. Geptner, Docents A.N. Druzhinin, and N.V. Shibanov. In my first years at the
Paleontological Institute, I learnt a great deal from B.P. Vjuschkov, Professors I.A. Efremov, K.K. Fl...
A new cynodont, Madysaunrs sharovi gen. et sp. nov., belonging to the aberrant descendants of the procynosuchian cynodont lineage is described. Its parietals are wide, have a small parietal foramen, and lack a sagittal crest. A separate postfrontal, along with the prefrontal and postorbital, contribute to the formation of the upper orbital rim. The...
A new cynodont, Madysaurus sharovi gen. et sp. nov., belonging to the aberrant descendants of the procynosuchian cynodont lineage is described. Its parietals are wide, have a small parietal foramen, and lack a sagittal crest. A separate postfrontal, along with the prefrontal and postorbital, contribute to the formation of the upper orbital rim. The...
The intercentrum of the atlas of Karenites has a dual nature. The manus retains rudimentary praepollex and postminimus. The hind limb is long, the fibula curves sigmoidally, the calcaneus has a well-developed tuber calcanei, the astragalus is incompletely developed, and the tibiale and intermedium are separate. The dorsal armor, represented by a me...
Viatkogorgon ivachnenkoi Tatarinov is a small gorgonopian with well-developed gastralia and hypapophyses of the caudal vertebrae and broad and short feet with distal intertarsal contacts. This animal was apparently a relatively good swimmer. The gastralia of Viatkogorgon were acquired secondarily (punctuated homology).
The methods of phylogenetic studies are legitimate and supplement each other. However, even taken as a whole, they cannot provide a complete reconstruction of the course of evolution.
Based on an incomplete lower jaw, a new scaloposaurian, Malasaurus germanus gen. et sp. nov., is described. This is a multidentate scaloposaurid with five lower incisors and a long mandibular symphysis of extraordinary structure.
The progress in cladistics promoted the revival of the concept of the monophyletic origin of mammals. The discovery of the Early Cretaceous monotreme Steropodon in Australia gave impetus to the development of these ideas. However, the wide diversity of the Late Triassic mammals, which has recently come to light; morphological peculiarity of haramiy...
A new genus and species of the family Trirachodontidae, Neotrirachodon expectatus gen. et sp. nov., is described on the basis of the lower jaw previously referred to as the gomphodont cynodont Antecosuchus ochevi. The new form is the first finding of a trirachodontid in Russia.
Based on an incomplete lower jaw, a new scaloposaurian, Malasaurus germanus gen. et sp. nov., is described. This is a multidentate scaloposaurid with five lower incisors and a long mandibular symphysis of extraordinary structure.
The progress in cladistics promoted the revival of the concept of the monophyletic origin of mammals. The discovery of the Early Cretaceous monotreme Steropodon in Australia gave impetus to the development of these ideas. However, the wide diversity of the Late Triassic mammals, which has recently come to light; morphological peculiarity of haramiy...
Monotremes developed a middle ear containing three auditory ossicles and a modified mandibular depressor independently of therian mammals. This suggests that the similarity between the most primitive therians and the Lower Cretaceous monotreme Steropodon may be convergent. In contrast to the inner ear of therians, that of monotremes retains the mac...
A new gorgonopid, Suchogorgon gohtbevi gen. et sp. nov., is described from the upper part of the Severodvinsk Horizon and assigned to the subfamily Cynariopinae. Suchogorgon is distinguished from Sauroctonus progressus, a gorgonopid of the same geological age, by more developed concavities at the upper base of the postorbital arches, the presence o...
Based on five isolated teeth from the Shestakovo locality, a new tritylodont genus and species, Xenocretosuchus sibiricus is described. This is the first find of a member of this group in Russia. This form is assigned to a tritylodont group characterized by two transversal rows of cusps on the cheek teeth. The buccal and labial cusps on the upper t...
In addition to the postcanine part of the maxillary sinus characteristic of theriodonts, ictidosuchids also possessed a developed preorbital part partially formed by the palatine. On the internal wall of the maxilla, a bony crest supporting the maxilloturbinalia (providing respiratory and thermoregulatory function) extends along the lachrymal duct....
In the holotype of Viatkosuchus sumini, the occipital condyle is absent, the occipital bones are asymmetrical, the atlas and epistropheus are transformed, and the atlas center is doubled. This is caused by a mutation in one of the homeotic genes controlling the development of segmentation in the anterior part of the body.
In Scalopognathus multituberculatus, the neural arch of the proatlas is located in the fossa on the exoccipital and joined to the pseudozygapophyseal process of the latter. The basipterygoid articulation is mobile and formed by the epipterygoid and basisphenoid. The carotid and vidian canals are absent. The stapes articulates with the quadrate only...
A new Upper Pemian scaloposaur species Perplexisaurus foveatus is described. The superfamilly Ictidosuchoidea (=Scaloposauroidea) is revised and a new family the Karenitidae is described. The description of Perplexisaurus foveatus is based on an incomplete skull. Denticulated ridges on the palatina form a system of bony bolsters. Teeth on the ptery...
Citations
... Additional Russian gorgonopsian taxa were not recognized until the turn of the century, with the description of the small gorgonopsians Viatkogorgon ivakhnenkoi from the Kotelnich locality of the Kirov Region (Tatarinov, 1999a) and Suchogorgon golubevi from the Ust'e Strel'ny locality of the Vologda Region (Tatarinov, 2000a). Most recently, another isolated braincase (from the Klimovo-1 locality of the Vologda Region) was made the holotype of Leogorgon klimovensis, purportedly the first Russian rubidgeine gorgonopsian (Ivakhnenko, 2003;although see Kammerer (2016) for doubts on this identification). ...
... Neotrirachodon expectatus (Tatarinov, 2002) and Redondagnathus hunti (Lucas et al., 1999;Spielmann & Lucas, 2012), classified as trirachodontids by their authors, were not included in this study as they probably do not represent gomphodont cynodonts (Sidor & Hopson, 2018). Neotrirachodon, synonymized with Antecosuchus by Ivakhnenko (2011), likely belongs to a bauriid therocephalian (Battail & Surkov, 2000;Abdala, Neveling & Welman, 2006;Abdala & Smith, 2009;Gao et al., 2010;Sues & Hopson, 2010;Ivakhnenko, 2011) whereas Redondagnathus' dental material displays several features absent in Trirachodontidae, namely: a central cusp strongly mesially/distally deflected from the labial and lingual cusps and much higher than the two latter cusps, no valley-like concavities separating the central cusp from the labial and lingual cusps, a cingulum significantly apically higher than the other one, apically pointed cingular cuspules varying dramatically in size along the cingulum, presence of a basally inclined spalling surface extending below the cingulum as well as an important protuberance on the basal part of the root (Sidor & Hopson, 2018;C. ...
... In addition to the multitude of insects, freshwater bivalves, tadpole/shield shrimps and fish were also found there. A primitive cynodont, Madysaurus (Tatarinov 2005), was the only possible predator of the fenestrasaurs thus far discovered. ...
... So far, Ferganodendron sauktangensis appears to be endemic to Madygen. Several organisms from Madygen also show a restricted geographical distribution such as various vertebrates (Sharov, 1970(Sharov, , 1971Tatarinov, 2005;Voigt et al., 2006;Buchwitz and Voigt, 2010;Schoch et al., 2010), insects (e.g., Shcherbakov, 2008a,b;Béthoux et al., 2010) and pteridosperms (Sixtel, 1962;Dobruskina, 1995). The proportionally high number of endemic taxa in Madygen may be explained by the fact that our current knowledge of terrestrial Triassic ecosystems is based primarily on data from tropical and subtropical latitudes, whereas the Madygen Formation was deposited an intramontane basin at a palaeolatitude of 35°-40°N (Voigt et al., 2006;Moisan et al., 2011). ...
... The causes, regulariities, and driving forces of evolution of live nature are usually analyzed from the standpoint of the generally accepted theory of evolution. Recently, in connection with obvious necessity of new synthesis of the evolutionary theory (see Tatarinov, 2002;Nazarov, 2005;Takhtajan, 2007;Pigliucci and Müller, 2010;Shishkin, 2010;Laland et al., 2014;etc.), an interest in macroevolutionary problems increased considerably (see Simon, 2002;Price, 2003;Elbe, 2004;Erwin, 2005Erwin, , 2010Erwin, , 2011Pontarotti, 2011;Laland et al., 2014;Fraser, 2015;Futuyama, 2015;Serelli and Contier, 2015;etc.). ...
... In monotremes, the depressor of the lower jaw (m. detrahens mandibulae) is a derivative of jaw muscles and is innervated by the mandibular branch of the trigeminal nerve (V 3 ) (Adams, 1919;Hopson, 1966;Parrington, 1974;Tatarinov, 2001;Diogo et al., 2008). In extant nonmammalian tetra pods, the mandibular depressor in the narrow sense (m. ...
... If this is correct, then receptors connected to the trigeminal nerve, such as tactile receptors similar to the dome pressure receptors present on the snout of crocodilians (Leitch & Catania, 2012) or electroreceptors similar to those of monotremes (Manger & Pettigrew, 1995, 1996 may have been present. The presence of similar receptors has already been hypothesized in a wide variety of therapsids including the Russian therocephalian Perplexisaurus (Tatarinov, 1999;Ivakhnenko, 2001;Surkov, 2006). Alternatively, the arrangement of the jaw musculature, construction of the skull, and the presence of a patent suture between the premaxilla and maxilla all suggest that Lystrosaurus had a powerful, snapping bite (Crompton & Hotton, 1967;Cluver, 1971;Jasinoski, Rayfield, & Chinsamy, 2009, 2010a, 2010b, and increased innervation of the snout may have increased food selectivity during feeding, as recently hypothesized in dinosaurs (Barker et al., 2017). ...
... The mean SCM of cynodonts from Asia is 12% (19 species between the Olenekian and Valanginian) and that of North America is 15% (10 species between the Carnian and Pliensbachian). The greatest temporal range is observed in the European palaeocontinental record, which spans the Wuchiapingian to the Aptian (based on the occurrence of Xenocretosuchus sibiricus in present-day Russia [Tatarinov and Matchenko 1999], here binned into the European palaeocontinental region for analytical purposes. Although Russia spans the European and There is no significant temporal correlation between cynodont completeness metrics and those of ichthyosaurs, plesiosaurs, anomodonts, parareptilian tetrapods, sauropodomorphs, or non-avian theropods (Table 4). ...
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... Gebauer (2014) redescribed the holotype of "Scymnognathus" parringtoni, reassigning it to the Russian genus Sauroctonus. Tatarinov (2004) described the most complete gorgonopsian skeleton yet found (PIN 2212/61, the holotype of Viatkogorgon ivakhnenkoi), an articulated skeleton that includes even rarely preserved skeletal elements such as the gastralia and sclerotic ossicles. And most recently, Sidor (2022) revisited gorgonopsian pedal morphology on the basis of some exceptionally preserved specimens from Zambia (albeit unidentified in the absence of cranial material). ...
... The earliest Russian assemblage preserving a substantial number of therocephalians is the Kotelnich locality in Kirov Region. Although known since the 1930s as a source of spectacularly-complete pareiasaurs (Hartmann-Weinberg, 1937), therocephalians were not described from Kotelnich until the 1990s (Tatarinov, 1995a(Tatarinov, , 1995b(Tatarinov, , 1997(Tatarinov, , 1999a(Tatarinov, , 1999b. Now, however, they are the most species-rich tetrapod clade known from the site, with eight named species (Chlynovia serridentatus, Karenites ornamentatus, Kotelcephalon viatkensis, Muchia microdenta, Perplexisaurus foveatus, Scalopodon tenuisfrons, Scalopodontes kotelnichi, and Viatkosuchus sumini), although these may be somewhat oversplit (Ivakhnenko, 2011). ...
