Articles tagged with Morphology
Brachycephalus dacnis is the seventh species of flea toad identified in the genus Brachycephalus. The study published by a group at the State University of Campinas provides detailed information about its anatomy, skeleton, and internal organs.
Researchers confirm 15 new species in Characidium genus, including genetic distance smaller than 2% between species with significant morphological differences. The study highlights the need for reevaluation of species classification and evolutionary history.
A new robust classification system for termites has been developed through expert consensus and extensive data analyses. The updated 'dictionary' of termites resolves ambiguity in the previous system, providing a solid platform for studying termite diversification and ecosystem roles.
Researchers investigated the interaction and genetic introgression between two closely related spider mite species in Japan's mountains. The study found extensive overlapping distribution, hybrids, and genetic introgression, shedding light on speciation in haplodiploid organisms.
Researchers have challenged the conventional view of myriapod ovarian morphology by discovering structural specialization in pill-millipede Hyleoglomeris japonica. The follicle epithelium, previously considered a homogenous structure, exhibits two distinct regions with enhanced and reduced metabolic activities.
A new Japanese lily species, Lilium pacificum, has been identified after 110 years, revising the conventional classification into eight taxons. The plant has unique characteristics and is adapted to specific environments in Japan, offering clues for speciation studies.
The Komodo Dragon's teeth develop and replace rapidly, with up to five replacement teeth per position in its jaws. This allows it to quickly respond to prey capture or injury, making it an ideal model for studying theropod dinosaur life history and feeding strategies.
A new study by Concordia researchers found a strong positive relationship between percentage body fat and echo intensity, indicating more fat within the muscle. The study also revealed differences in lumbar multifidus characteristics between male and female athletes, with females having larger LMs than males.
Researchers discovered ancient bird-like footprints in Southern Africa that date back over 210 million years, 60 million years before the earliest known bird fossil. The tracks were found at multiple sites and show a mix of dinosaur and bird-like characteristics.
A new study has found that different gross subtypes of hepatocellular carcinoma (HCC) have significantly different prognoses and molecular characteristics. The study suggests that gross classification may be valuable for developing individualized diagnosis and treatment strategies for HCC, with potential implications for patient outcomes.
Researchers discovered six new species of rove beetles with unique genital shapes, including a bottle-opener like structure in one species. Climate change threatens the survival of these species due to habitat changes.
Research by Hokkaido University's Masayo Soma found that Java sparrows show increased swelling in their eye rings when paired with a preferred mate. This change serves as a rapid indicator of mating readiness and plays a crucial role in communication between pair-bonded birds.
A recent study analyzes snake brain morphology to shed light on their early evolution and adaptability. The research reveals that early snakes were fully adapted for underground living but displayed versatile behaviors, reflecting differences in diet and environment.
A new sauropod dinosaur species, Garumbatitan morellensis, was discovered in the Iberian Peninsula. The fossil remains found in Sant Antoni de la Vespa exhibit unique characteristics, including a morphology similar to modern sauropods from the Late Cretaceous.
A new study from North Carolina State University found that the shape of small bones in the throat, called hyoid bones, may be key to determining whether sabertooth tigers purred or roared. The researchers compared the anatomy of modern roaring cats and purring cats to find that the missing bones in saber-toothed tigers' hyoid structur...
Researchers have identified a new species of leaf-tailed gecko from northern Madagascar, showcasing its exceptional camouflage skills. The discovery has shed light on the unique characteristics of this species, including its skin flaps and flattened tail.
New research uses MRI and CT scans to study the anatomy of primate clitoris, revealing stark differences in morphology across species. The findings suggest that female genitalia have been chronically understudied, with significant diversity in clitoral structure and function.
Researchers have made a groundbreaking discovery in the developmental biology of Parhyale hawaiensis, a tiny crustacean with unique appendages. By tracking the development of an embryo, they found that cells divide and reorient themselves to maintain alignment with the head-tail axis, resulting in a robust and coordinated body structure.
Researchers discovered that leaf-cutting ants use the position of their hind legs gripping the leaf edge and head position to guide cutting trajectory. The ants adapt their technique to cut smaller elliptical portions when faced with thick leaves, using a combination of sensory information.
This study reconstructs Sessilida's phylogenetic tree using infraciliature and silverline system, establishing two new families. It challenges traditional morphology-based classification and provides insights into the origin and evolution of this group.
The new technique allows for the production of a dozen different soft polymer material morphologies, including ribbons, nanoscale sheets, rods, and branched particles. By precisely controlling three sets of parameters during manufacturing, researchers can fine-tune the morphology of polymeric materials at the micro- and nano-scale.
Research reveals island-dwelling mammal species face higher extinction risks, with those experiencing extreme size changes being particularly endangered. Human arrival on islands multiplies the probability of extinction by 16, contributing to a 'protracted extinction event' spanning over 100,000 years.
A recent study using planktonic foraminifera fossils found a global clade-wide shift in marine latitudinal zones towards the Equator. The researchers discovered that this shift was not tied to species diversity or functional traits, but rather ecological and morphological characteristics of the organisms.
The study, conducted by the University of Malaga and others, analyzed the skeleton and brain architecture of Miracinonyx trumani, finding that it had retractable claws and was able to grapple with its prey like cougars. Its brain surface also showed differences from cheetahs, suggesting an intermediate form between the two species.
Evans' five-year grant will examine how modularity affects the evolution of complex biological structures and provide a framework for their study. The research could advance our understanding of shape change in other complex structures and have cultural and historical significance.
A study of 10 mummified crocodile remains discovered in an undisturbed tomb at Qubbat al-Hawā offers new insights into pre-Ptolemaic mummification practices. The unique preservation style suggests a different approach to carcass evisceration and resin use compared to other archaeological sites.
A study of 665 pet dogs found that life history, owner gender, and breed can influence canine behavior. The results highlight the importance of environmental interactions in shaping animal behavior, suggesting that traits like weight, height, and cranial morphology impact the dog-owner relationship.
Deep-sea squat lobsters are reclassified after Harvard researchers discovered five new species, showing wider geographic distribution ranges and shallower genetic diversity. The discovery highlights the importance of molecular data in understanding evolutionary history.
The procedure requires thorough pre-procedural evaluation and assessment of anatomical and hemodynamic data. Long-term results indicate that TPVR can effectively restore RVOT function, while improving survival rates and reducing the need for reintervention across age groups. Vigilant testing is recommended to avoid rare but serious com...
Researchers discovered that cold-water coral reefs optimize their growth in response to ocean currents, capturing organic matter and resources. This self-organization allows them to thrive in deep environments, serving as architects of ecosystems and habitats for diverse species.
A study explores the link between shark nose shape, size, and sensitivity of smell. The researchers found that more lamellae in rosettes with an elongated shape are associated with increased odor sensitivity.
A study published in the Journal of Archaeological Science reveals that a domestic dog lived in the Palaeolithic period 17,000 years ago in the Erralla cave in the Basque Country. The bone remains identified as Canis lupus familiaris, making it one of Europe's most ancient domestic dogs.
Scientists have made significant progress in understanding fungal diversity by identifying a new species, rediscovering an existing one, and reclassifying another. The study's findings have implications for fields like cell biology, genetic engineering, medicine, and environmental science.
A team of researchers from Korea investigated the dynamics of the p-Laplacian AC equation, finding that solutions maintain three criteria: phase separation, boundedness, and energy decay properties. They also identified an advantage of p-AC equation over classical Laplacian in adjusting interface sharpness.
Researchers at Kyushu University developed a new method to create highly detailed 3D models of plants and animals. Over 1,400 models are now publicly available for use in education, research, and virtual exploration.
A research team at Kumamoto University has identified the separation of Japanese cockroaches in ancient pottery, dating back over 5,000 years. The study found that the smokybrown cockroach was native to western Japan and the Yamato cockroach was native to eastern Japan.
A research group from Japan has found a new genus of fungus in the Kickxellales that inhabits the guts of cave crickets, suggesting the evolutionary transition between saprobes and gut-inhabiting fungi. The discovery sheds light on how fungi in the Kickxellomycotina evolved to live inside animals.
A new genus and species of algae called Protocodium sinense has been discovered in China, providing new insight into the early diversification of the plant kingdom. The fossils are remarkably modern-looking and suggest that green algae were already established in shallow waters as carbon dioxide recyclers and oxygen producers before th...
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.
Paleontologists at Tübingen University's Senckenberg Centre have discovered a previously unknown genus and species of dinosaur, Tuebingosaurus maierfritzorum. The herbivore lived in the Swabian Alb region from 203 to 211 million years ago, displaying similarities with large long-necked sauropods.
Researchers assessed facial structure of prehistoric skulls to determine extent of interbreeding between humans and Neandertals. The study found that the Near East was an important crossroads for human migration and interaction, supporting the hypothesis that much of this interbreeding took place in the region.
A new Harvard-led study reveals that rising global temperatures caused the explosive evolution of early reptiles, challenging previous explanations. The research suggests climate change triggered morphological changes in reptile groups, including those that gave rise to crocodiles and dinosaurs.
A new study reveals that four living amphibian clades, including the dominant Plethodontidae family of lungless salamanders, develop lungs as embryos but lose them as adults. This finding sheds light on the evolution of lung loss over millions of years and suggests that losing lungs may have enabled their remarkable evolutionary success.
Two new-to-science scorpions, Paruroctonus soda and P. conclusus, are described by Bay Area high school students Harper Forbes and Prakrit Jain in collaboration with the California Academy of Sciences. The species are alkali sink specialists found only in playas from Central and Southern California.
Researchers found that human larynx evolution led to stable voices and controlled pitch without adding new structures. This simplification allowed for the development of complex vocal information, enabling humans to communicate effectively.
The Sixty-third Supplement to the Check-list of North American Birds updates bird classifications, including meadowlark species splits, hummingbird recognitions, kite separations, and the addition of a giant-petrel. New subspecies are also recognized for some bird species, reflecting advances in genetic analysis.
A fossilized wrist bone from a 6-7 million-year-old giant panda ancestor reveals the earliest evidence of a bamboo diet and the evolution of its unique 'thumb' structure. The discovery sheds light on how this adaptation allowed ancient pandas to thrive on a low-nutrient bamboo diet.
Researchers used high-resolution micro-CT scans to reveal key features in Palaeospondylus fossils, placing it as an early ancestor of tetrapods. The study resolves long-standing evolutionary mysteries, including the lack of teeth and dermal bones in the fossil record.
Researchers discovered that salamanders rely on aerial postures similar to skydivers to slow and direct their descent. These 'parachuting' animals use fine-scale control to maintain upright body postures and execute banking turns.
A CNIC team has created a dynamic 3D atlas of the formation of the heart during embryonic and fetal development, allowing for the identification of the first appearance of left–right asymmetry in the heart. This study provides important information on the development of congenital heart malformations.
A new species of dusky salamander has been discovered in the Gulf Coastal Plain of Mississippi and Alabama, increasing knowledge of the region's biodiversity. The species, Desmognathus pascagoula, is similar to another recently discovered species but has distinct morphological, genetic, and geographic characteristics.
New research from Washington University in St. Louis shows that crows and ravens' diverse traits enabled their rapid global expansion. Their intelligence allowed them to adapt to new environments, while their big bodies gave them a competitive advantage.
Researchers used X-ray computed microtomography to produce stunning 3D reconstructions of the proteus' head, revealing extensive changes in sensory organs and physical appearance. The study provides detailed information about evolutionary-designed adaptations for surviving in lightless caves.
A new bird species, Fregetta lineata, was discovered in New Caledonia and is believed to be critically endangered. With an estimated population of 100 to 1,000 pairs, the species is already threatened.
Scientists at Tel Aviv University have created two-dimensional polymer microfiber networks that exhibit shape memory properties. These networks can be controlled by temperature-induced changes, allowing for morphing materials with microscale resolutions.
A researcher is studying the pufferfish genome to understand its evolutionary history and how it developed distinctive physical traits. The study aims to uncover the underlying genetic mechanisms behind the fish's varying body shapes and extreme sizes.
A recent study uses deep neural networks to analyze CT scans of dinosaur fossils, reducing manual segmentation time from days to minutes.
A team of scientists from Germany, Spain, Australia and Japan discovered a new species of branching marine worm, Ramisyllis kingghidorahi, in Japan. The worm has a unique body shape with one head and multiple posterior ends, living inside the internal canals of sea sponges.
Researchers found correlations between brain morphology and sensory characteristics in adults with ASD, suggesting structural changes may cause sensory abnormalities. The study aims to improve diagnosis and treatment options for ASD beyond behavioral indicators.
Researchers provide evidence that mammalian and avian primitive streaks evolved independently, using different mechanisms to form the body plan. They suggest alternative landmark for ethical oversight in human embryological research.