Articles tagged with Reptiles
A new species of armored reptile, Mambachiton, shows that the precursor to dinosaurs and pterosaurs had bony plates on its backbone, indicating that armor was ancestrally present in bird-line archosaurs. The loss and re-evolution of armor is an important aspect of dinosaur evolution.
Researchers discovered unprecedented snake venom resistance in caecilians, highlighting the species' ability to evolve under severe selective pressure. The study found that caecilians deployed three distinct biological methods to resist elapid snake venom, including changing receptor shape and deploying an electromagnetic 'weapon'.
A new study reveals that reptiles demonstrate spontaneous associations between visual and auditory information, including tortoises associating low sounds with large shapes and high pitch sounds with small shapes. This discovery shows how brains are prepared to predict visuo-acoustic correspondences likely to occur in the natural world.
A new species of ancient alligator, Alligator munensis, is described from a fossilized skull in Thailand. The species is closely related to the Chinese alligator and has unique features such as a broad snout and large tooth sockets, suggesting it ate hard-shelled prey.
Researchers have discovered that rattlesnakes can modulate each other's stress responses when in the presence of a companion, similar to human behavior. This phenomenon, known as social buffering, was observed in wild-caught snakes in Southern California and persisted even after hibernation or mating.
UK schoolchildren aged 7-11 drew mammals and birds most commonly, with reptiles and amphibians appearing less frequently. The study suggests children's perceptions of local wildlife are skewed towards mammals and birds, hinting at a wider problem of nature disconnect.
A study by University of Nebraska-Lincoln undergraduates found that drought can lower survival odds, slow growth, and even skew the ratio of female-to-male painted turtles. The team discovered a 7% decrease in female survival and a 10% decrease in male survival rates during drought periods.
Research found that microplastics can increase sand temperature, potentially altering sea turtle sex ratios and hatchling success. Concentrations of up to 30% microplastic had the greatest impact, with temperatures rising by 0.58 degrees Celsius.
A review of scientific literature on reptiles between 1960 and 2021 found that 15% of articles focused on only ten species, with fewer than ten studies published on 90.5% of all species. The authors attribute this bias to factors such as habitat, size, danger of extinction, and proximity to research institutions.
A 3-year-old girl was infected with M. marinum after being bitten by an iguana while on holiday in Costa Rica. The toddler developed a ganglion cyst and eventually responded to treatment with rifampin and clarithromycin.
Researchers discovered that theropod dinosaurs, including T. rex and Velociraptor, had scaly lips similar to those of lizards, contradicting popular depictions. The study found that dinosaur teeth were not unusually large and were comparable in size to modern lizard teeth when adjusted for skull size.
A new study reveals that the most endangered turtles and crocodiles are those with unique life strategies, which carry out critical processes in their ecosystems. The researchers highlight the urgent need for effective conservation management plans to protect these species and their habitats.
Researchers at the University of Bern discovered that geckos can detect and distinguish their own skin chemicals from those of other geckos, revealing a new level of social complexity in these animals. This finding suggests that geckos are more intelligent than previously thought, using pheromones for communication and self-recognition.
Researchers found that snake species distribution in the Chaco region correlates with adaptations, such as fossorial habits for burrowing and arboreal traits. The study showed that southern species have small eyes and short tails, while northern species have long tails and are tree dwellers.
A new species of snake, Dipsas aparatiritos, has been described from western Panama, having gone unnoticed for over 40 years. The species is relatively common and has a characteristic bulbous head and brown-and-black patterning.
A University of Texas at Austin paleobiologist's new examination reveals the serious impact of reptile extinctions on island ecosystems. The study found that smaller islands lack a buffer when losing reptile species, leading to reduced ecosystem stability and increased vulnerability to collapse.
Researchers at McGill University have identified a crucial gene (tfec) controlling reptile pigmentation and specifically the classic piebald trait. By combining whole-genome sequencing, gene-editing, and electron microscopy, they found that this mutation affects color-producing cells in reptiles.
Five new tree-dwelling snake species were discovered in the jungles of Ecuador, Colombia, and Panama. The research highlights the devastating impact of open-pit mining operations on these unique creatures.
A new species of bent-toed gecko from the genus Cyrtodactylus has been identified in Timor-Leste, a remote region in Southeast Asia. The newly discovered species, named Cyrtodactylus santana, is the first of its kind to be formally described as a species in Timor-Leste.
Researchers have discovered that ancient crocodilian hemoglobin required 21 interconnected mutations to develop its hyper-efficient oxygen-binding properties. This complexity, not found in other vertebrates, enabled crocodilians to exploit their onboard oxygen stores for extended periods underwater.
Researchers found parallel genomic signatures in urban Anolis cristatellus lizards, which also exhibit physical differences such as longer limbs and larger toe pads. These adaptations enable the lizards to thrive in cities.
Researchers found that wooded areas, cropland, roads, and housing developments are obstacles to snake relocation. Reconnecting fragmented populations through strategic habitat changes could help restore the species to a thriving state.
A high-throughput analysis of 26 medically important snakes in sub-Saharan Africa reveals the benefits of an integrated approach to understanding their venom composition and function. The study provides a solid foundation for further research on snake biology and antivenom development.
A novel technique using stable isotopes can accurately determine whether wood turtles are wild-caught or captive-bred, helping combat the illegal pet trade. The method was tested on 71 turtles and achieved a success rate of over 97%, providing conservation law enforcement officials with a valuable forensic tool.
Conservation efforts in Madagascar require balancing human development with protection of its rich biodiversity, which is threatened by extinction due to local species' uniqueness. Reforestation and community engagement are recommended strategies for addressing these challenges.
Fossils of Whatcheeria, a six-foot-long lake-dwelling creature, revealed that it grew big by front-loading its growth in its youth. Contrary to the slow-and-steady growth pattern seen in many modern reptiles and amphibians, Whatcheeria's rapid growth as a juvenile provided a competitive advantage as a top predator.
Researchers have discovered a new critical period for sex determination in sea turtle embryos, influenced by temperature fluctuations. The study reveals two peaks in temperature's impact on sex ratio during the thermosensitive period of development.
Climate change poses a significant threat to southwestern US reptile and amphibian populations, with limited-dispersal species facing the greatest vulnerability. The study suggests that prioritizing conservation efforts for these species may be crucial to mitigating habitat loss.
A study published by the University of Zurich has found that vocal communication in vertebrates has a common and ancient evolutionary origin, dating back to around 407 million years ago. The research used vocal recordings and contextual behavioral information from 53 species across four major clades of land vertebrates.
Researchers at the University of Zurich have successfully decoded the genome of Aldabrachelys gigantea, one of the world's two remaining giant tortoise species. The reference genome provides crucial information for breeding programs in zoos to represent genetic diversity and conservation efforts across East Africa and Madagascar.
Researchers have completed and released a chromosome-scale genome sequence of the Aldabra giant tortoise, providing a much-needed genetic resource for rescue efforts. The data will aid in breeding efforts, comparative studies with other tortoise species, and understanding the species' remarkable size.
Researchers discovered three new cryptozoic snake species in Ecuador's Andes, named after institutions supporting cloud forest conservation. The discovery highlights the need for habitat protection due to widespread destruction of native habitats.
Scientists discover Opisthiamimus gregori, a new extinct species of lizard-like reptile that lived in Jurassic North America alongside dinosaurs. The discovery sheds light on the evolution of rhynchocephalians, an order that diverged from lizards over 230 million years ago.
New research finds that most tokay geckos sold in Hong Kong's TCM shops originated from Southeast Asia, not locally. The study highlights the need for stricter control of pet trade releases to protect this vulnerable species.
A new study reconstructs the skeletal structure of Coelurosauravus elivensis, a Late Permian reptile that likely used tree canopy changes to facilitate its evolution. The research reveals the gliding apparatus was supported by either the gastralia or musculature of the trunk.
Scientists discovered the rarest North American snake, Tantilla oolitica, locked in fatal combat with a giant centipede it swallowed. The CT scan revealed that the centipede's size was the final blow, cutting off the snake's air supply.
A team of scientists generated a molecular atlas of the Australian bearded dragon's brain, comparing it to mouse data. The findings suggest that both reptilian and mammalian brains evolved clade-specific neuron types from a common ancestral set, challenging popular views on brain evolution.
Researchers have identified eight new species of tiny brown geckos in Madagascar's rainforests, expanding our understanding of their distribution and evolution. The discovery highlights the importance of continued sampling across the region to uncover new species.
Harvard researchers found that rapid evolution of reptiles began much earlier than previously thought, connected to increasing temperatures. The study used a dataset of over 1,000 fossil specimens and analyzed their adaptation to climatic shifts.
A study published in Scientific Reports found that amphibian and reptile invasions cost the global economy at least $17.0 billion between 1986 and 2020. The majority of costs were attributed to American bullfrog and brown tree snake invasions, highlighting the need for effective policies to limit future invasions.
Scientists have discovered a new, venomous pit viper species in Jiuzhaigou National Nature Reserve, China. The newly described snake has unique characteristics and is found to feed on small mammals in sunny days by the roadside.
Exotic snakebites in the UK are increasing, with 321 reported cases over 11 years, mostly affecting children under 5. Most bites result in mild symptoms, but severe cases have occurred, prompting concerns about illegal snake ownership and access to expert advice.
Researchers at the University of Illinois Urbana-Champaign created a high-resolution map of the bearded dragon's brain, providing a standardized protocol for future clinical cases. The study identified nine anatomic structures in the brain and developed a safe and efficient MRI and sedation protocol.
A comprehensive study reveals that turtles, crocodilians, and salamanders have low aging rates and extended lifespans. Protective phenotypes like hard shells contribute to slower aging, with some species experiencing 'negligible aging' or lack of demographic aging.
The first international study of its kind assesses the status of all reptile species, revealing that at least 2,000 species are threatened with extinction. The study found that 50% of turtle and crocodile species face extinction threats, while 30% of forest-dwelling reptiles and 14% of arid area reptiles are in danger.
A new species of leopard gecko, Eublepharis pictus, has been discovered in India's relic forests. The Painted Leopard Gecko measures 11.7 cm in length and is strictly nocturnal, actively foraging along trails in the forest after dusk.
A new machine learning tool assesses extinction risk for reptiles with limited data, revealing a higher number of threatened species than previously estimated. The study highlights the need for increased conservation efforts in regions such as Australia, Madagascar, and the Amazon basin.
The snake trade in Indonesia is plagued by unsustainable practices, including underreported and illegal international trade in blood pythons. Research suggests that the current quota system may not be effective in ensuring sustainable harvesting, highlighting the need for urgent action to address these concerns.
A new species of Phalotris snake was discovered in Paraguay's Cerrado forests, characterized by its unique red head, yellow collar, and black lateral band. The species is considered Endangered due to its extreme rarity and limited distribution.
Researchers at Gauhati University studied roadkill on a 64-kilometer stretch of National Highway 715 in India's Kaziranga-Karbi Anglong Landscape. They found dramatic mortality rates among frogs, toads, snakes, and lizards, with over 6000 animals killed annually.
Research suggests that ecotourists' sugar-fed wildlife interactions are causing northern Bahamian rock iguanas to develop high blood sugar levels. The study found that iguanas on islands frequently visited by tourists had higher glucose peaks and difficulty regulating their blood sugar.
A study has discovered that humans are disrupting a fundamental pattern in ecosystems, which dates back at least 66 million years. The U-shaped relationship between diet and size in modern land mammals has been found to span across multiple vertebrate groups, including birds, reptiles, and fish.
Scientists from around the world gather to discuss various amphibian and reptile diseases, with a focus on conservation and management strategies. The conference aims to identify solutions to mitigate the impact of these diseases on herpetofauna populations, which are currently experiencing alarming extinction rates.
Researchers discovered that boa constrictors adjust which section of the rib cage they use to inhale depending on whether they are resting, throttling an animal or digesting. The sinuous reptiles use different sections of the rib cage to breathe when their ribs are constricted.
The discovery of Hanyusuchus sinensis, an extinct crocodilian species, sheds light on the evolution of modern crocodilians and their role in ancient ecosystems. Human migration and hunting led to its extinction, which may have influenced ancient Chinese myths and characters.
A comprehensive analysis of brain cellular composition across amniotes shows that mammals and birds have dramatically increased neuron numbers in the telencephalon and cerebellum, associated with higher cognition. The study suggests that only a handful of unique evolutionary events augmented brain processing power in these groups.
Researchers analyzed 263 viper species to find significant correlations between horn types and habitats. Nasal horns are associated with terrestrial forest habitats, while ocular horns are linked to tree-dwelling or sparsely vegetated environments.
A research team led by University of Adelaide found tangible evidence that Australian elapids arrived by sea rather than land. The study analyzed genomes of two Australian elapids and compared them to marine and semi-marine elapid sea snakes, finding similarities with marine life genes.
A recent study has found that snake venoms and mammalian salivary proteins share a common origin, suggesting that the foundation for venom to evolve exists in both snakes and mammals. This discovery reveals that the line between venomous and non-venomous mammals is blurrier than previously thought.
A newly discovered extinct reptile species, Shashajaia, has provided insights into the evolution of human teeth. The ancient creature's unique dental structure shows evidence of canine-like differentiated teeth present in synapsids by the Late Carboniferous period.