Vladislav S. Vergilov

Vladislav S. Vergilov
National Museum of Natural History - Bulgarian Academy of Sciences · Vertebrates Department

Dr.

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29
Publications
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68
Citations
Citations since 2016
25 Research Items
67 Citations
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2016201720182019202020212022051015

Publications

Publications (29)
Article
Full-text available
Existing techniques for examining the everted vesica (endophallus) of Lepidoptera are based primarily on cuticular preparations macerated with a caustic solution for taxonomic study. These techniques destroy muscles and other soft tissue, thus studies of the functional anatomy of the skeletomuscular apparatus of the phallus are not possible. Inject...
Article
Full-text available
The Snake-eyed Skink Ablepharus kitaibelii (Bibron & Bory de Saint-Vincent, 1833) is one of the smallest lizards in Europe, and this, combined with its secretive lifestyle, makes population studies on the species very difficult. Only a few studies concerning sparse data, mainly on the species' activity, have been published, but its population ecolo...
Article
Full-text available
So far, in Bulgaria several fossils of extinct anuran species have been found, but all seem doubtful. Only two pelobatid remains have been found from the Balkans and the regions - younger species (Late Pleistocene) of the genus Pelobates from Serbia and Miocene Pelobates sp. from Turkey. The fossil in the current study represents a larva of the gen...
Article
The slow-worm lizards (Anguis) comprise five species occurring throughout most of the Western Palearctic. Although these species are relatively uniform morphologically – with the exception of A. cephallonica, which exhibits a quite unique morphology – they are genetically deeply divergent. Here, we provide detailed distribution maps for each species...
Article
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Different amphibians and amphibian larvae were already observed and described as part of the diet of the European pond turtle. Few studies report body parts from adult newts in the stomach content of Emys orbicularis (Linnaeus, 1758) or newts predated by the same pond turtle species. We observed remains of Triturus dobrogicus (Kiritzescu, 1903) and...
Article
The penis of the recently described mole Talpa martinorum and its relative, the European mole Talpa europaea, are described and compared. Considerable differences in the morphology of the glans penis were found: the apical part is narrow and rod-like in T. martinorum and conical in T. europaea; the keratinous papillae covering the basal part of the...
Article
Full-text available
Since its appearance in pet stores in Bulgaria in the 1990s, the pond slider Trachemys scripta has been released at multiple localities across the country, but this process has been subject to limited scientific attention. Here, we update the distribution of this invasive alien species by adding 17 new squares to the previously published 30 of the...
Conference Paper
Full-text available
A conference paper reviewing published research and preliminary data on the ongoing studies of a recently discovered late Santonian - early Campanian tetrapod fossil site in Western Bulgaria.
Article
Full-text available
Historia naturalis bulgarica 41: 99-101 ISSN 2603-3186 (online) | ISSN 0205-3640 (print) · nmnhs.com/historia-naturalis-bulgarica https://doi.
Article
The two following notes concern two species of small skinks, genus Ablepharus: Lindberg's Twin-striped Skink (Ablepha-rus lindbergi) and the Snake-eyed Skink (Ablepharus kitaibelii). Both species are small fossorial/semi-fossorial skinks with fused eyelids and a hidden lifestyle. A. kitaibelii is distributed disjunctly in several subspecies in Cent...
Conference Paper
Full-text available
In a recently published paper (Popgeorgiev et al. 2019), we compiled for the first time published and unpublished data on localities of the herpetofaunal species observed up to ca. 10 km south of the Bulgarian Danube River. Overall, we identified 687 published records belonging to 62 cells of the 10×10 km MGRS grid. Another 1918 records with real c...
Article
Full-text available
The genus Ablepharus encompasses 10 species and 12 subspecies, distributed from Hungary to India. Most species and subspecies have been described from the Middle East and Central Asia, based on external morphology (pholidosis, body size and coloration). The present study is an attempt to demonstrate the hemipenial morphology throughout the genus. S...
Article
Full-text available
The Snake-eyed Skink’s intra- and inter-specific interactions and their impacts on the individual (e.g. injuries) have received little attention so far. As part of copulation, male lizards bite the females; observations confirm an old report that bites occur in the fore side of the body, along with more recently published information about the back...
Article
Cranial kinesis refers to intracranial movements in the vertebrate skull that do not concern the jaw joint, the middle ear or the hypobranchial skeleton. Different kinds of cranial kinesis have been reported for lizards, including mesokinesis, metakinesis, amphikinesis (simultaneous mesokinesis and metakinesis) and streptostyly. Streptostyly is con...
Article
Full-text available
Currently, information on the reproductive cycle of snake-eyed skink Ablepharus kitaibelii (Bibron & Bory de Saint-Vincent, 1833) in Bulgaria is lacking, though some data on egg laying were published. We performed a histological study on gametogenesis and incubation period of eggs of this species. The histology of testes demonstrated that males rea...
Article
Full-text available
Most of the studies dealing with the Snake-eyed skink (Ablepharus kitaibelii) treat predominantly aspects of the distribution and taxonomy of the species. In the present study we provide information concerning the mechanism of hatching in the Snake-eyed skink and the dimensions of the hatched specimens. We collected data from wild animals, as well...
Article
Full-text available
Ablepharus kitaibelii (Bibron & Bory de Saint-Vincent, 1833), is one of the smallest scincid species in the world. Apart from a single observation in captive A. kitaibelii, there is no information on the lifespan of any species of the genus Ablepharus Lichtenstein, 1823. In the present skeletochronological study the maximal number of hibernations w...
Article
Full-text available
The defensive behavior of the Snake-eyed skink is reported for the first time. It includes different strategies as hiding, spiral winding of the body, moving the tail in a worm-like manner, detaching the tail and limbs, thanatosis and even biting. Data on the observed activities of the species in the wild are also provided.
Article
Full-text available
We report for the first time on the occurrence of tail bifurcations in the snake-eyed skink (A. kitaibelii). This morphological anomaly was identified during a four-year monitoring program conducted in a herpetological hot-spot at Pastrina hill (northwestern Bulgaria). From a total of 415 captured specimens, four animals (0.96%) showed symmetrical...
Article
Full-text available
The hemipenes of two closely related Ablepharus species, A. kitaibelii (Bibron & Bory de Saint-Vincent, 1833) and A. budaki Göcmen, Kumlutas & Tosunoglu, 1996 are described for the first time. These species are of similar general appearance and differ by few external and variable characters only. The genital morphology, however, revealed profound d...
Article
Full-text available
Scincid lizards are represented with a single species over most of the Southeastern Europe. Up to data snake-eyed skink Ablepharus kitaibelii has not been reported for Montenegro. Here reported new distribution record contributes to the westernmost species range. This species is rare and with restricted and fragmented distribution in neighboring co...
Article
Full-text available
The snake-eyed skink Ablepharus kitaibelii is one of the small-est European lizards, but despite its minute size it is able to feed on comparatively large prey. Here we investigate the diet of A. kitaibelii and the mechanisms that allow the skink to overpower relatively large and even noxious prey. High-speed cinematogra-phy showed that A. kitaibel...
Article
Full-text available
The snake-eyed skink (Ablepharus kitaibelii Bibron & Bory de Saint-Vincent, 1833) is the only species of the family Scincidae in Bulgaria and the northernmost species of this family on the continent. The present study covers material from 52 UTM squares in the entire country. The dataset (n=226) includes 90 males, 90 females and 46 juveniles. Four...

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