Science topics: SnakesColubridae
Science topic
Colubridae - Science topic
The largest family of snakes, comprising five subfamilies: Colubrinae, Natricinae, Homalopsinae, Lycodontinae, and Xenodontinae. They show a great diversity of eating habits, some eating almost anything, others having a specialized diet. They can be oviparous, ovoviviparous, or viviparous. The majority of North American snakes are colubrines. Among the colubrids are king snakes, water moccasins, water snakes, and garter snakes. Some genera are poisonous. (Goin, Goin, and Zug, Introduction to Herpetology, 3d ed, pp321-29)
Publications related to Colubridae (4,842)
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This paper contains information on the records of bottom macroinvertebrates, fish, amphibians, reptiles, birds and mammals collected during a field expedition to the valley of the Shokhdara River (in the vicinities of town of Khorog city) near its mouth and confluence with Panj River in autumn 2019 – spring 2020. According to the results of the stu...
The uncommon Eastern King snake, Lampropeltis getula (Linnaeus) is recorded considerably south of its known range in Florida. The chain color pattern is diagnostic. King Snakes usefully eat juvenile invasive pythons, but naturally consume other snakes.
In this study, Western blot analysis was performed to measure the concentration of spinophilin in four different brain regions (olfactory bulb, pre-optic area, nucleus sphericus, and midbrain) from animals treated with testosterone or estrogen. Histological analysis of brains from hormone-treated animals was also conducted to correlate morphologica...
It is important to understand the effects that sex hormones and seasons have on the brain activity of the male red-sided garter snake. Many studies agree that this is the key to understanding estrogen receptor signaling of neurons in the preoptic area [11], aromatization of androgens in dissociative reproductive patterns [5,7,8], and environmental...
Animals that consume toxic diets provide models for understanding the molecular and physiological adaptations to ecological challenges. Garter snakes (Thamnophis) in western North America prey on Pacific newts (Taricha), which employ tetrodotoxin (TTX) as an antipredator defense. These snakes possess mutations in voltage-gated sodium channels (Nav)...
Discovery rates of new species are uneven across taxonomic groups and regions, with distinctive and widely distributed species being more readily described than species with secretive habits. The genus Rhynchocalamus includes five species of secretive snakes distributed from Egypt eastwards to Iran, including the Arabian Peninsula. A wide biogeogra...
Variation in life histories influences demographic processes from adaptive changes to population declines leading to extinction. Among life history traits, generation length offers a critical feature to forecast species’ demographic trajectories such as population declines (widely used by the IUCN Red List of Threatened Species) and adaptability to...
In this chapter, we present an annotated list of species and illustrate 69 species of amphibians and reptiles with recorded occurrence in the Lago do Amapá Environmental Protection Area. The amphibians were represented by anurans of the families Aromobatidae, Bufonidae, Craugastoridae, Dendrobatidae, Hylidae, Leptodactylidae, Microhylidae, and Phyl...
This research provides information on using contemporary software for assessing the density of Colubridae and Psammophiidae family representatives in the Kashkadarya region. TPS64until and TPS264Dig softwares were utilized for the mathematical modeling of molted skins of species of these families. Subsequently, the models underwent Principal Compon...
A herpetological survey during recent expeditions to the foothills of the Cordillera de Colán in the Amazonas region of Peru resulted in new records and extensions of the geographical distribution of three poorly known species of reptiles: Dipsas welborni (family Colubridae), Gelanesaurus flavogularis (family Gymnophthalmidae), and Synophis insulom...
Kunitz-type peptide expression has been described in the venom of snakes of the Viperidae, Elapidae and Colubridae families. This work aimed to identify these peptides in the venom gland transcriptome of the coral snake Micrurus mipartitus. Transcriptomic analysis revealed a high diversity of venom-associated Kunitz serine protease inhibitor protei...
Predation events are difficult to observe due to the unpredictable nature of the environment and timing, which may result in researchers and observers being unable to document them or having to leave before the event is completed. Here, we present predation attempts on Crotophaga major and Thraupis palmarum by Oxybelis fulgidus. These events provid...
In general snakes show differentiate anatomical, biological and behavioral particularities compared to other species. Basic information about the snakes anatomy, physiology and reproductive biology is scarce in several species, making the reproduction a challenge. Thus, the present work aims to evaluate morphological aspects of the Corallus hortula...
Lycodon gammiei (Blanford, 1878), a rarely encountered species of Asian snake, is characterized by ambiguous systematics and biology. Based on a sole specimen of L. gammiei rediscovered in southeastern Xizang, China, we conduct a detailed morphological examination and description, and investigate the systematic position of this species. Morphologic...
Triangle Watersnake (Hydrops triangularis) Reptiles of Ecuador | Serpentes | Colubridae | Hydrops triangularis English common name: Triangle Watersnake. Spanish common names: Culebra acuática triangular, culebra de agua triángulo. Recognition: ♂♂ ♀♀. Hydrops triangularis can be identified by having dorsally oriented eyes and nostrils, round pupils,...
Reptiles of Ecuador | Serpentes | Colubridae | Hydrops martii English common names: Hammer Watersnake, Coral Mud Snake. Spanish common name: Culebra acuática martillo. Recognition: ♂♂ ♀♀. Hydrops martii can be identified by having dorsally oriented eyes and nostrils, round pupils, a single internasal scale, no loreal scale, and smooth dorsal scales...
We provide the first list of the amphibians and reptiles of the municipality of Bahía de Banderas, Nayarit, Mexico. We carried out a historical review of the herpetological records of the municipality and complemented them with our own records. We recognized a total of 1494 organisms, belonging to 72 species of herpetozoans, representing 30 familie...
We document for the first time diving behavior and long-term immersion (> 15 minutes) for the Neotropical whipsnake Chironius carinatus. This report is from the Sierra Nevada de Santa Marta, Cesar department, northern Colombia, and highlights that knowledge of the habits and habitat use of this conspicuous snake remains fragmentary.
Influenced by rapid changes in climate and landscape features since the Miocene, widely distributed species provide suitable models to study the environmental impact on their evolution and current genetic diversity. The dice snake Natrix tessellata, widely distributed in the Western Palearctic is one such species. We aimed to resolve a detailed phy...
We describe a new species of kukri snake (Oligodon Fitzinger, 1826) from the limestone karst formations of Satun and Trang Provinces in southern Thailand. Phylogenetic analyses based on three mitochondrial DNA fragments (12S–16S ribosomal rRNA and cytochrome b) recover the new species within the Oligodon cinereus species complex, where it forms a d...
Se presenta la adición de la “culebra perico de la costa del Pacífico” Leptophis diplotropis y la “culebra verde ratonera” Senticolis triaspis a la diversidad herpetofaunística en un Área Natural Protegida de Sierra Surutato, Sinaloa, México.
Activity patterns in animals are often species-specific, and can be generally categorized as diurnal, crepuscular, or nocturnal. Understanding these patterns provides insight into ecological adaptations and behaviors. The common grass snake (Natrix natrix), one of the most common and widespread European snake species, is traditionally considered di...
Although several phylogeographic studies of Asian snakes have been conducted, most have focused on pitvipers, with non‐venomous snakes, such as colubrids or natricids, remaining poorly studied. The Chinese keelback water snake ( Trimerodytes percarinatus Boulenger) is a widespread, semiaquatic, non‐venomous species occurring in China and southeaste...
Simple Summary
Leptophallus nigrovenosus is a trematode parasite found in snakes that requires feeding on amphibians to acquire the parasite. Firstly, this study investigated, in detail, the sensory receptors on the cercariae of these parasites, shedding light on the adaptations that allow them to find their host species. Secondly, the metacercaria...
Although extensive research has been conducted on snake venoms, the effects of bites inflicted by non-front-fanged colubroid snakes remain incompletely understood, particularly for species of uncertain medical relevance. The Western Whipsnake (Hierophis viridiflavus) is a colubrid snake typically classified as non-venomous and harmless to humans. N...
Abstract: Of the 17 species of snake known to occur in New York, 12 occur on Long Island, and one, Crotalus horridus (Timber Rattlesnake) has been extirpated. To date, there has not been a comprehensive analysis of the trends and distribution of the snakes of Long Island, due in large part to their cryptic nature and lack of regular inventory or mo...
We present novel distributional information on the little-known snake species Dryophylax chaquensis (Bergna & Álvarez, 1993) in Bolivia, including the first record from Cochabamba Department. Our record extends the distribution of this species towards the Bolivian Inter-Andean Dry Forests by approximately 63 km to the west (in a straight line) from...
We present novel distributional information on the little-known snake species Dryophylax chaquensis (Bergna & Álvarez, 1993) in Bolivia, including the first record from Cochabamba Department. Our record extends the distribution of this species towards the Bolivian Inter-Andean Dry Forests by approximately 63 km to the west (in a straight line) from...
Nearly one in five reptile species is at risk of extinction. Changes in habitat area, its configuration, and vegetation diversity could affect habitat use, but their relative importance is understudied. We assessed how these factors affected reptile presence in agricultural landscapes figure in Iowa, United States, using 695 cover boards visited 16...
The Urartian rat snake, Elaphe urartica Jablonski, Kukushkin, Avcı, Bunyatova, Ilgaz, Tuniyev & Jandzik, 2019, is a recently described species within the genus Elaphe, found in eastern Anatolia, Caucasian region and the northern Middle East. It stands as one
of the rarely observed snake species, with its distribution and other aspects of natural hi...
In this study, we investigate the phylogeographic patterns of Dolichophis species in the Aegean region, aiming to elucidate their genetic diversity and putative historical colonisation routes through mitochondrial and nuclear DNA data. Our findings revealed distinct phylogeographic patterns: D. caspius exhibited a higher level of haplotypes within...
The javanese keelback water snake (Fowlea melanzostus) is a semi-aquatic reptile that often found in Indonesia and endemic to Java island. Water tiger snakes are usually kept as exotic pets. Wild caught javanese keelback water snakes have risks of spreading several disease agents that can be zoonotic, which is nematodiasis caused by Ophidascaris sp...
The present study reports the diversity of sea snakes along the Saurashtra coast. Seven species of sea snakes belonging to sub-family Hydrophiinae and three from family Acrochordidae and Colubridae were reported. The detailed taxonomic identification of reported species with synonyms, diagnostic characters and distribution is given here.
Simple Summary
An adult male variable kingsnake was examined for a three-week history of anorexia and body deformities, revealing poor condition and an intracoelomic mass. With the owner’s consent, an exploratory celiotomy was performed to remove the mass, which was identified as an undifferentiated tumour by modified Wright–Giemsa stain smears. Hi...
The snake Oxybelis potosiensis is a generalist predator that consumes a wide variety of prey, including birds, mammals, reptiles, and fish. We present the first documented record of Anolis rodriguezii in the natural diet of O. potosiensis in Southeastern Mexico. This event contributes to the knowledge of the trophic interactions of both species.
Although snakes of the genus Tantilla are widespread throughout much of the Western Hemisphere, many aspects of their distribution and ecology remain unknown. Here, we present additional distribution records of Tantilla schistosa in the state of Chiapas, Mexico. We also explore the inconsistent literature regarding the distributional and elevationa...
Resumen. La presencia y diversidad de serpientes en las islas del Golfo de California están fuertemente ligadas a complejos eventos geológicos que han dado forma al área a lo largo de los últimos veinte millones de años. Durante este periodo la actividad volcánica, la separación de masas de tierra y el aumento del nivel del mar han guiado la formac...
Delhi, the capital city of India is, highly urbanized and surrounded by remnant forest, farms, ridges, and other green areas experience regular snake encounters in and around residential, institutional, and industrial areas. A total of 41 months of sampling from January 2019 to May 2022 was conducted wherein we, studied the snake assemblage in Delh...
The Kaan (“Snake”) kings, a powerful political entity in the Classic Maya Lowlands, were housed in the Early Classic period at Dzibanche, and they moved their capital to Calakmul by the year a.d. 642 (Helmke and Awe 2016; Martin 2020:138–139). Their network of alliance and intermarriage radiated southward, and Waka's early eighth-century queen, Lad...
Because of their host's energetic exhaustion, parasites are among the first species to be influenced by environmental changes. The change in habitats caused by human activities can negatively influence ecosystems, reducing the resistance of host species to parasite attacks. There is little information on the role of urban disturbance in altering di...
The rapid growth of global human activities has increased the introductions of nonnative species to an unprecedented level.
Among globally documented nonnative species, reptiles and amphibians make up a significant portion. Although the introduction of many nonnative species has been linked to the wildlife trade and stowaways, the origin of introdu...
Snakes contain three types of phospholipase A2 (PLA2)-inhibitory proteins in their blood, PLIα, β, and γ, which protect them from their own venom, PLA2. PLIβ is the snake ortholog of leucine-rich α2 glycoprotein (LRG). Since autologous cytochrome c (Cyt c) serves as an endogenous ligand for LRG, in this study, we purified snake LRGs from various sn...
We report the rediscovery of two species of rare snake in Espírito Santo state, Brazil: Apostolepis longicaudata Gomes, 1921 (also rare elsewhere in Brazil) and Drymoluber brazili (Gomes, 1918). Apostolepis longicaudata has gone undetected in Espírito Santo for 66 years and Drymoluber brazili for 46 years. Espírito Santo state has only 10% of its...
Sexual dimorphism is a common phenomenon among snakes, with female snakes being larger than male snakes as a recurrent pattern . However, species that show male-male combat behaviour may impose a selective advantage by developing larger bodies in male specimens, like the diurnal Chironius snakes, which display courtship and male-male combat behavio...
Leucism, in which pigmentation is lost over part or the entire body of an animal, has a range of possible genetic causes. Here, we report leucism in an individual tiger keelback ( Rhabdophis tigrinus ) found on Jeung Island, Shinan‐gun, Jeollanam‐do, South Korea, during a survey of the distribution of reptiles in the area. The individual was observ...
The Canadian Herpetologist / L'Herpétologiste Canadien Vol13 Winter 2023/2024
Here I report an observation of a Plains Gartersnake (Thamnophis radix) hunting Northern Leopard Frogs (Lithobates pipiens). One interesting element I noticed was the snake’s head movements while waiting. While holding its head slightly above the water and seemingly star...
Distribution notes - Salvadora intermedia in Oaxaca, Mexico
The occurrence of the Salmon-bellied Racer, Mastigodryas melanolomus (Cope, 1868), on the Isla del Coral in the Pacific coast of Mexico is confirmed through the examination of squamation and the use of other morphological characters. Additionally, we conducted a morphological analysis to assess the differences between M. melanolomus and Masticophis l...
Snakebite is an acute life-threatening medical emergency and is included among the neglected tropical diseases in India. The incidence of snakebite mortality is particularly high in Southeast Asia and India has the highest number of cases of snakebites with a mortality of 35,000 to 50,000 cases per year according to the World Health Organization (W...
Currently, the proposed diagnoses for the Chironius bicarinatus complex reflect a wide variation in color pattern and pholidosis. Herein, we review the Chironius bicarinatus complex based on morphological and molecular data from a sample of 485 specimens covering the species distribution. Our results corroborate the recognition of C. bicarinatus an...
Conopsis biserialis is a small small snake with terrestrial and diurnal habitats and a restricted distribution in Central Mexico. The use of underground microhabitats and the subterranean activities of this small snake are uncommon characteristics to observe. Here, the use of a subterranean microhabitat after the rainy season in two specimens of C....
Background Filovirus disease is a highly pathogenic zoonosis of humans caused by the viral genera Ebolavirusand Marburgvirus. A rich biodiversity of predators has been suggested to suppress the risk of zoonotic spillover by regulating prey abundance and behavior. However, the effects on bat-borne zoonoses remain to be investigated because the empir...
This record shows the largest recorded size of the Brown Water - Snake of 1 080 mm, increasing the known maximum size of this species by approximately 110mm, an increase of 11.3%.
Knowledge of the spatial distribution of reptiles is essential for decision-making in conservation under future climate change scenarios. We present a new compilation of reptile records for Odesa Oblast (i.e. province), south-west Ukraine. We compiled 662 records: 200 from our own research during 2012–2022, 362 from the published literature, 73 fro...
This study documents the first interaction between a southern black-eared opossum and an adult Spilotes pullatus within the dense ombrophilous Atlantic Forest of Ilhabela, SP, Brazil. Additionally, a comprehensive review of Spilotes pullatus predators across its geographical range was conducted. Our findings underscore a notable scarcity of documen...
Rapid biodiversity assessments are essential to understanding species density within specific sites at any given time. As part of an ecosystem assessment for site restoration, an ecosystem diversity survey was conducted on the left side of the Kalu river mouth from October 8 to 10, 2023, spanning from 7:30 a.m. to 3:00 p.m. The surveyed stretch, ap...
First records of the Madrean Mountain Kingsnake (Lampropeltis knoblochi) in the Dos Cabezas and Dragoon mountains, Arizona
A critical analysis of literature data on the records of Elaphe sauromates in the Atyrau region of the Republic of Kazakhstan in 1857–2006 is presented. Doubtful finds of the species in the Volga-Ural interfluve and in the vicinity of the city of Atyrau require confirmation. New finds in the region in 2018 and 2021, like all reliable previous ones,...
The distribution of smooth snake in the Caspian lowland of Russia and Kazakhstan is analyzed according to the collections of the Zoological Museum of Moscow State University and published works. The map with smooth snake finds includes 36 localities of the species (Volgograd Region, Stavropol Territory, Kalmykia, Chechen Republic, Dagestan, and Kaz...
The role of modified teeth in the function of prolonged bites in Hierophis viridiflavus (Serpentes: Colubridae). Analysis of the maxillary, palatine, pterygoid, and dentary bones of the Western Whipsnake, Hierophis viridiflavus carbonarius, revealed the presence of grooves and ridges in the teeth on the four dentiferous bones. Enlarged and modified...
Seemingly unrelated traits often share the same underlying molecular mechanisms, potentially generating a pleiotropic relationship whereby selection shaping one trait can simultaneously compromise another. While such functional trade-offs are expected to influence evolutionary outcomes, their actual relevance in nature is masked by obscure links be...
Coevolution between two species can lead to exaggerated phenotypes that vary in a correlated manner across space. However, the conditions under which we expect such spatially varying coevolutionary patterns in polygenic traits are not well-understood. We investigate the coevolutionary dynamics between two species undergoing reciprocal adaptation ac...
As a result of analyses of fatty acid (FA) composition in the grass snake Natrix natrix and its food objects, tadpoles and metamorphs of two amphibian species: the moor frog Rana arvalis and the Pallas spadefoot toad Pelobates vespertinus , it was shown for the first time that the high total content of eicosapentaenoic (EPA) and docosahexaenoic (DH...
We describe a new species of Ninia Baird & Girard, 1853 endemic to the cloud forests of northwestern Ecuador. The new species has previously been confused with N. atrata (Hallowell, 1845) and N. teresitae (Angarita-Sierra and Lynch 2017) but is genetically most closely related to a third species of Ninia endemic to the Chocoan–Tumbesian transition...
Aunque la mayoría de las especies de serpientes están adaptadas para consumir presas grandes, la evaluación errónea del límite del tamaño de la presa que son capaces de ingerir, puede ocasionar la muerte de la serpiente. Aqui presentamos el tercer caso de muerte incidental en un adulto de Trimorphodon biscutatus a causa de la depredación de un ejem...
It is well known that rodenticides are widely used, and there are multiple routes by which they can reach non-target wildlife species. Specifically, in the Canary Islands, a high and concerning incidence of these compounds has been reported. However, in this scenario, reptiles remain one of the least studied taxa, despite their potential suitabilit...
The Malayan Banded Wolf Snake Lycodon subcinctus Boie, 1827 once included three subspecies, namely L. s. subcinctus Boie, 1827, L. s. sealei Leviton, 1955, and L. s. maculatus (Cope, 1985). Thereafter, L. s. sealei has been elevated to species level, and the taxonomic status of L. s. maculatus has not been resolved. We sequenced the mitochondrial c...
As global temperatures continue to increase, understanding the impacts of warming environments is increasingly relevant. Temperature is especially relevant for ectothermic organisms which depend upon consistent and predictable annual temperature cycles for reproduction and development. However, additional research is required in this area to elucid...
In this study, we investigated the infection by pulmonary parasites in the water snake Helicops angulatus. We found four nymphs of the pentastomide parasite Sebekia oxycephala, parasitizing two adult females H. angulatus collected in the municipality of Rio Tinto, Paraíba, Brazil. This occurrence is likely due to the nymphs of this parasite directl...
We present new Gabonese locality records, ecological and morphological data or
unpublished museum specimens for Kinixys erosa (Trionychidae), Trionyx triunguis
(Trionychidae), Osteolaemus tetraspis (Crocodylidae), Agama agama (Agamidae), Varanus ornatus (Varanidae), Atractaspis boulengeri (Atractaspididae), Crotaphopeltis hotamboeia, Hapsidophrys s...
In the main version of the Ovchi (hunter) tale, Pirim, meets two twisted serpents – white and black (in one version of the tale, the black serpent was the lover of white one, in the other, she tried to kill her). Ovchi Pirim, seeing howthe black snake strangles the white one, takes out his bow, shoots at the black one, but misses and the arrow hits...
Erythrolamprus albertguentheri (Colubridae) es una especie endémica de la región del Chaco en Bolivia, Paraguay y Argentina. Documentamos un primer registro de la presencia de E. albertguentheri en el departamento de Santa Cruz (Bolivia) fuera de su rango de distribución conocido y ampliamos su distribución geográfica hacia el norte de Bolivia, asi...
Colombia encompasses three mountain ranges that divide the country into five natural regions: Andes, Pacific, Caribbean, Amazon, and Orinoquia. These regions offer an impressive range of climates, altitudes, and landscapes, which lead to a high snake biodiversity. Of the almost 300 snake species reported in Colombia, nearly 50 are categorized as ve...
Uno de los grupos de fauna menos estudiados en el municipio de Neira (Caldas) son las serpientes. Con el objetivo de presentar un listado actualizado de serpientes para el municipio, se realizaron muestreos diurnos y nocturnos entre el 15 de octubre de 2022 y el 30 de marzo de 2023. Se registraron un total de 33 individuos pertenecientes a 18 espec...
Thirty-two species of amphibians and reptiles were reported during this study, including 16 families (Ranidae, Geoemydidae, Cheloniidae, Gekkonidae, Sphaerodactylidae, Phyllodactylidae, Agamidae, Lacertidae, Scincidae, Varanidae, Trogonophidae, Boidae, Colubridae, Psammophiidae, Viperidae and Elapidae). Family Geckkonidae was represented by the hig...
Twenty-four specimens of Pantherophis guttatus (Linnaeus) (corn snake) from North Carolina were examined for endoparasites. Fourteen species of helminths (2 cestodes, 10 nematodes, 2 acanthocephalans) and 1 pentastome are reported, representing 14 new host records and 1 new geographic distribution record. No trematodes were found, and the salvaged...
New Guinea is the second largest island in the world and the largest tropical island. Its location at the western edge of Melanesia places it at a significant distance from American, Asian, and African snake faunas, and groups of snakes that are common in the rest of the world are either conspicuous in their absence (Viperidae) or relatively poorly...
During a helminthological survey of snakes in the Cerrado Biome in Maranhão State, Brazil, we found intestinal nematodes in Leptodeira annulata (Linnaeus), belonging to the genus Oxyascaris Travassos, 1920. We observed that the specimens found are distinct from their congeners by the combination of presented characters, mainly the cuticular expansi...
This study presents the first complete mitogenome of the Brazilian Atlantic bushmaster Lachesis with insights into snake evolution. The total length was 17,177 bp, consisting of 13 PCGs, 22 tRNAs, two rRNAs and a duplicate control region (CRs). Almost all genes were encoded by the heavy-strand, except for the ND6 gene and eight tRNAs (tRNA-Gln, Ala...
It was discovered that cold-blooded species of animals (steppe turtle, sheltopusik (Pallas’ glass lizard) and water snake) have a very low aerobic metabolism, the level of which is about 10 times lower than that of warm-blooded rats. These data are consistent with literature data obtained on other animals. According to the modern literature, warm-b...
The corn snake (Pantherophis guttatus) is a non-venomous snake from the Colubridae family. The pair of scent glands is indispensable in the physiology of reproduction and defense of the species. This structure is located caudal to the cloaca. It is responsible for releasing a thick material based on lipids containing pheromones that perform functio...
Resumen Silva, J. J.: Las serpientes del género Atractus Wagler, 1828 (Colubridae, Xenodontinae) en la Amazonia colombiana. Rev. Acad. Colomb. Cienc. 28 (108): 409-446, 2004. ISSN: 0370-3908. Se presenta un estudio biológico y ecológico del género Atractus Wagler, 1828, en la región amazónica colombiana. Un total de 113 especímenes fueron obtenidos...
The Sierra Gorda de Querétaro Biosphere Reserve (SGQBR) is one of the largest natural protected areas in Mexico; however, little is known about the richness and diversity of amphibians and reptiles. We present an updated list of species of both groups, the conservation status of these species, as well as an analysis of their diversity with respect...
El eritrismo es una coloración aberrante descrita como rara en serpientes y caracterizada porque individuos presentan una pigmentación rojiza en varias regiones del cuerpo. En esta nota reportamos un caso de eritrismo en la serpiente Thamnophis scaliger en los alrededores del Parque Estatal Sierra Morelos, México.
We present new Gabonese locality records, ecological and morphological data or unpublished material for Chamaeleo dilepis (Chamaeleonidae), Hemidactylus mabouia (Gekkonidae), Feylinia boulengeri, Panaspis breviceps (Scincidae), Monopeltis sp. (Amphisbaenidae), Polemon collaris (Atractaspididae), Dasypeltis congolensis, Dipsadoboa duchesnii, Grayia...
ABSTRACT Snake venom disintegrins are low molecular weight, non-enzymatic proteins rich in cysteine, present in the venom of snakes from the families Viperidae, Crotalidae, Atractaspididae, Elapidae, and Colubridae. This family of proteins originated in venom through the proteolytic processing of metalloproteinases (SVMPs), which, in turn, evolved...
The colonization of novel environments requires a favorable response to conditions never, or rarely, encountered in recent evolutionary history. For example, populations colonizing upslope habitats must cope with lower atmospheric pressure at elevation, and thus reduced oxygen availability. The embryo stage in oviparous organisms is particularly su...
Se documenta el hallazgo de Amastridium veliferum (Ophidia: Colubridae), en la región noroccidental de Sudamérica, con base en un ejemplar macho adulto procedente de la vertiente oeste de la cordillera Occidental de Colombia. Este individuo posee las características fenotípicas propias de las poblaciones del sur de Centroamérica (Costa Rica y Panam...
The northern cottonmouth, Agkistrodon piscivorus (Lacépède, 1789) (Viperidae: Crotalinae), occurs in the southeastern United States and is one of the few semiaquatic vipers in the world. Three proteocephalid tapeworms of the genus Ophiotaenia La Rue, 1911 (Cestoda), have been described from this venomous snake. A critical evaluation of type specime...
Wireless mesh networks facilitate the provision of Intranet and Internet connectivity across diverse environments, catering to a wide range of applications. It is anticipated that there will be a significant volume of traffic on these networks. The selection and placement of gateway nodes is a significant research concern due to their responsibilit...
Predictive models of species distribution can be beneficial for identifying the most important and influential environmental factors in species distribution and understanding the current and future habitat suitability of species. In this study, we used species distribution modeling to find out the potential distribution and habitat suitability of t...
Snakes in the family Colubridae include over 2,000 currently recognized species, and comprise roughly 75% of the global snake species diversity on Earth. For such a spectacular radiation, colubrid snakes remain poorly understood ecologically and genetically. Two subfamilies, Colubrinae (788 species) and Dipsadinae (833 species), comprise the bulk o...
We describe a new species of the Natricinae genus Rhabdophis Fitzinger, 1843 from the Hoang Lien range, northwest Vietnam. The new species is distinct from all congeneric species on the grounds of morphometric and molecular data. The new species is most similar to Rhabdophis leonardi in terms of morphology but can be distinguished from it based on...
