Articles tagged with Reptiles
A study of 43,000 reptile bone remains found that European colonization led to mass extinctions of 50-70% of snakes and lizards on the Guadeloupe Islands. The Indigenous populations had no impact on local reptile diversity.
A new study confirms the island rule, showing that insular gigantism and dwarfism are generalized patterns across vertebrates. The effects are more pronounced in smaller, remote islands for mammals and reptiles.
A silent killer, Enterococcus lacertideformus, has been discovered as the cause of mysterious deaths in native reptile populations on Christmas Island. The bacterium grows in the animal's head and internal organs, causing death through direct contact or biting, highlighting the need for targeted antibiotic trials.
A team of researchers overturns the long-standing hypothesis that mammal ancestors moved like modern lizards. They discovered that non-mammalian synapsids moved their backbone in a manner distinctly different from any living animal.
A new Harvard-led study challenges the classic lateral-to-sagittal shift in mammal spine evolution, suggesting a completely different type of backbone function. The research found that nonmammalian synapsids had unique spinal characteristics not seen in modern reptiles or mammals.
Comparative biologists develop strategies to predict climate change impacts on species and ecosystems, informing conservation policy. Physiological adaptations and interactions between animals and their environments are crucial for building policies to protect keystone and vulnerable species.
A new study published in Ecology has discovered that monitor lizards are ecosystem engineers, creating complex burrow systems used by various animal communities. These systems provide critical shelter and resources, but their destruction due to invasive species like the cane toad threatens ecosystem balance.
A new species of ancient marine reptile, Brevicaudasus jiyangshanensis, has been identified in China, featuring a short, flattened tail used for balance. This adaptation allowed the creature to float motionless underwater, conserving energy while searching for prey.
New study uses phylogenetic information to estimate timing of Himalayan uplift and origin of biodiversity. The Stepwise Hypothesis is supported by in situ diversification and dispersal rates, while the Late Orogeny Hypothesis is rejected due to inconsistencies with origination and peak diversification times.
Researchers created the largest available timeline of reptile evolution using CT scans and fossil data from over 1,000 specimens. The study found that major transitions in evolution occurred through many small bursts of morphological changes over 50 million years, contradicting a widely held theory on rapid evolutionary bursts.
A study revealed that over 4,000 reptile species are in global trade, with 3/4 not covered by international regulations. Most traded species are endangered or range-restricted, especially from Asia.
Research suggests that climate change is causing ectothermic animals like fish, amphibians, and reptiles to age faster due to increased growth rates and heat stress. This can lead to reduced life expectancy and compromised ability to produce offspring.
Newly hatched tortoises preferentially orient toward face-like representations, which may be an evolutionary leftover from a common ancestor of mammals, birds, and reptiles. This exploratory behavior could play a role in learning and development.
A Montana State University researcher contributed to a novel project that sequenced the genome of the tuatara, a reptile referred to as a 'living fossil.' The study reveals ancient features of amniote evolution and provides insights into human genetic lineage.
Researchers compared tear composition in birds, reptiles, and humans, discovering similar electrolyte levels but distinct crystal structures. The study's findings may lead to new insights into the evolution of tears across species and improved treatments for eye health.
A new study has revealed that the long-necked reptile Tanystropheus was a surprisingly adaptable creature, living in water and hunting underwater. The researchers reconstructed its skull in unprecedented detail, showing adaptations for life in water, including long teeth for catching prey.
Researchers sequenced the tuatara genome, confirming its divergence from lizards and snakes about 250 million years ago. The study found that tuatara have a unique constitution, including a lot of repetitive DNA segments with no known function, which may help them escape predators and live up to 100 years.
Researchers found that venomous rattlesnakes are slightly more vulnerable to threats in colder temperatures, but not significantly so. The snakes were able to strike quickly even at low temperatures, suggesting they may be using a mechanism beyond muscle contraction.
A recent study found that reptile poaching in Balochistan has decreased since 2013, but the trade continues to pose a significant threat to biodiversity. The research team interviewed 73 illegal collectors and recorded 5,369 specimens of 19 species, all of which are protected under the Balochistan Provincial Wildlife Act.
A new study reveals that the Late Cretaceous reptile Priosphenodon had a unique type of tooth enamel, similar to that of mammals, which provided it with resilience against tooth wear. The researchers found that the enamel crystals in Priosphenodon were 'woven' into long threads called enamel prisms, a characteristic also found in mammals.
Researchers analyzed 18 extinct reptile species and 14 modern relatives, finding similarities in the vestibular system of open-ocean swimmers, including cetaceans. The study suggests that distinct evolutionary routes resulted in similar adaptations for different types of terrestrial animals transitioning to marine environments.
A new species of Triassic reptile discovered in Brazil is the closest known relative of tanystropheids, suggesting their ancestors may have lived on land before adapting to aquatic life. The discovery provides insights into the early diversification of tanystropheids and sheds light on their origins.
Animal welfare experts call for tighter laws on keeping dangerous snakes as pets, citing difficulties in managing them at home and treating them in veterinary practices. Many vets are also concerned about the lack of expertise and insurance to handle venomous snakes.
The discovery of Vellbergia bartholomaei, a tiny Middle Triassic lizard from Germany, provides new information about the early evolution of lepidosauromorphs. The species' unique characteristics suggest it may be a common ancestor of modern lizards and tuataras, revealing key findings in reptile evolution.
A new study by OIST researchers reveals that giant land tortoises have impressive powers of long-term recall, demonstrating their ability to recognize individual keepers and learn complex tasks. The study also found that tortoises trained in groups learned faster than those trained alone.
Researchers describe an extremely well-preserved pterosaur specimen from the Afro-Arabian continent, shedding light on the evolutionary history of these creatures. The study suggests that this type of pterosaur likely fed on crustaceans and lived in shallow marine waters during the Late Cretaceous period.
Researchers studied mammal vertebral columns and found discrete steps in complexity, linking increased activity levels to evolution. Complex spines evolved in bursts, influencing breathing, metabolism, and movement, shaping modern mammals' traits.
Scientists successfully edited the genes of albino lizards using CRISPR-Cas9, allowing them to study gene regulation and vision development. The technique, which can be applied to other animals, demonstrates a new approach for manipulating reptile genomes.
Tracy Langkilde has been recognized for her research on how animals adapt to changes in their environments. She has studied the behavior of lizards towards fire ants and explored the impact of noise pollution on frogs' communication abilities.
A recent study found that the Turkestan cockroach uses periplanones or similar substances as sex pheromones, exhibiting increased sensitivity compared to the American cockroach. This larger glomerulus enables more precise detection of tiny packets of pheromones.
Chimpanzees use percussive technique to gain access to meat of inaccessible reptiles, exhibiting intelligent behavior. They plan for future needs, such as hunger, in a surprising display of cognitive flexibility.
A University of Michigan-led team of biologists has documented 15 rare and disturbing predator-prey interactions in the Amazon rainforest, including images of tarantulas dragging opossums across the forest floor. The study highlights the importance of arthropods like spiders as a source of vertebrate mortality in tropical ecosystems.
The tegu lizard's genome has been sequenced to an unprecedented level of quality, revealing its ability to regulate its body temperature and potentially threatening native species. The high-quality genome assembly will aid scientists in studying other lizards and snakes, shedding light on their evolutionary history.
A geologist has discovered a set of ancient reptile footprints, 28 in number, left behind by a creature 310 million years ago. The discovery is significant as it is the oldest trackway found in Grand Canyon National Park.
A research team from the Federal University of Mato Grosso do Sul has published data on bird and reptile roadkill on Brazil's notorious BR-262 highway. The study found 930 animals representing 29 reptile and 47 bird species, with new records including the Black-and-white hawk-eagle.
Researchers analyzed fossilized Mesosaurus bones to determine the species' lifestyle and behavior. The findings suggest that mature adults spent more time on land, while juveniles were semi-aquatic.
A new study found that rainy years lead to a 3.9% spike in snake bites across California's 58 counties, contradicting the notion that drought increases encounters with venomous reptiles. The researchers suspect that rodents, which thrive in rainy conditions, may be the primary driver of this unexpected trend.
A study of fossilized teeth shows that marine predators thrived as sea levels rose during the Jurassic Period, while species in shallower waters declined. The research also found that the food chain structure beneath the sea has remained largely unchanged since the Jurassic era.
A Rutgers study finds that popular exotic pet reptiles and lizards are more likely to be released into the wild, causing ecological harm. The research highlights the need for education and resources to prevent these releases and mitigate invasive species.
A newly-discovered fossil turtle, Eorhynchochelys sinensis, lived 228 million years ago with a beak but no shell. This find sheds light on the evolution of turtles and challenges traditional theories, supporting mosaic evolution and shedding new light on turtle ancestry.
A team of biologists has discovered a new species of venomous snake, the Weipa bandy-bandy, in Australia. The snake's habitat is being threatened by bauxite mining, which may put it at risk of extinction.
Researchers from the University of Toronto discovered that Captorhinus, a small reptile from the Early Permian period, could detach its tail to escape predators. The reptiles had naturally occurring cracks in their vertebrae that allowed them to break away and escape relatively unharmed.
Experts weigh in on whether keeping reptiles and amphibians as pets should be restricted due to public health and animal welfare concerns. A team from Ghent University argues that with proper information and care, these animals pose no greater burden than traditional pets.
A study in Belize found that herpetofaunal communities remained relatively unchanged after Hurricane Earl, despite significant changes in the environment. The research highlights the ability of these species to adapt to anthropogenic pressures.
An international team has produced a catalogue and atlas of the world's reptiles, linking it with existing maps for birds, mammals, and amphibians. The new data reveals urgent conservation concerns, including drylands and deserts, where conservation action is vital.
Researchers from Helmholtz Centre for Environmental Research and Royal Zoological Society Scotland use genetic data to identify individual origins and potential trade routes of the skins. This helps in long-term conservation and verification of CITES documentation to restrict illegal schemes.
Research by James Cook University found that tree cover helps both tree-dwelling and ground-dwelling reptiles thrive on grazed land. Conservative stocking rates and retaining standing trees can increase native animal populations.
Scientists describe a new subspecies of yellow sea snake with an unusual ambush posture that feeds on small fish at night. The species has a restricted geographic range due to its adapted habitat, making it susceptible to extinction.
A 10-year, $2.7 million project in Ontario reduced turtle deaths on a causeway by 89%, offering global lessons for protecting endangered species. The initiative included fencing, culverts, and public awareness campaigns to reduce roadkill, with significant success.
Researchers from the Universities of Cape Town and Bonn suggest that warm-bloodedness may have originated 20-30 million years ago in land animals. This is based on analysis of long-extinct animal fossils, which show signs of fibrolamellar bone structure indicative of warm-bloodedness.
Researchers have re-evaluated and re-classified Diandongosuchus fuyuanensis, a reptile previously labeled as a poposauroid, linking it to the phytosaurs. The fossil's shape reveals its connection to this extinct group of semi-aquatic reptiles that lived during the Triassic Period.
Researchers uncover 16 million-year-old fossils of a small crocodile, Diplocynodon ratelii, which is similar to modern-day caimans. The discovery provides new insights into the early Miocene ecosystem in Catalonia, Spain.
A new amphibian species, Pristimantis attenboroughi, has been formally described from the Peruvian Andes, with characteristics including pale to dark gray coloration and distinct stripes. The species is considered Near Threatened due to habitat loss and climate change, highlighting the need for conservation efforts in protected areas.
A team at Salk Institute developed REPTILE algorithm to predict regulatory elements in noncoding regions of the genome. The method combines histone modification and methylation data for more accurate predictions, paving the way for targeted searches for disease-causing genetic variants.
A new study reveals that the illegal snake trade in Australia poses a serious threat to human lives and the environment. The research found that 5 out of 28 alien species were likely to succeed in becoming established, while 10 out of 28 were venomous snakes.
A 110-million-year-old snake-like reptile fossil from Brazil, named Tetrapodophis, has been reexamined by researchers. The fossil lacks many key snake features, such as recurved teeth and a snake-like skull, instead displaying traits similar to water-dwelling reptiles.
Research on sand lizards found that populations at the edge of their range exhibit lower genetic diversity compared to those in the center, making them more susceptible to climate change, parasites, and other challenges. This study highlights the importance of conservation efforts for species living on the periphery of their habitats.
A team of researchers has identified northeast Mindanao as a major hotspot for biodiversity in amphibians and reptiles. The region is home to 126 species, including frogs, lizards, snakes, turtles, and crocodiles.
A 200-million-year-old reptile named Drepanosaurus has been found to have unusually shaped forelimb bones with a massive hooked claw. The discovery sheds light on the evolution of four-footed animals and challenges current understanding of tetrapod limb evolution.
Scientists have discovered a new species of pterosaur from the Early Jurassic period in Patagonia, Argentina. The 'Allkauren koi' species boasts an intermediate state in brain evolution, shedding light on the origin and adaptation of flying reptiles.