Sentences with phrase «anatomical features of»

Previous theories attribute South America as the origin of marsupials, but anatomical features of the Didelphodon point to marsupials originating in North America 10 — 20 million years earlier than originally thought, and later dispersing and diversifying in South America.

Authors David Lordkipanidze, Marcia S. Ponce de León, Ann Margvelashvili, Yoel Rak, G. Philip Rightmire, Abesalom Vekua and Christoph P. E. Zollikofer say significant anatomical features of this skull can be found in earlier fossils assigned to the genus Homo, such as H. habilis, H ergaster and H. rudolfensis, and argue all comprise a single species within the genus Homo, with less variation among them than can be found within contemporary Homo sapiens.

Williams, Kay and Kirk also collaborated on a related article about to be published in the Proceedings of the National Academy of Sciences that reviews the early fossil record and anatomical features of anthropoids — the primate group that includes monkeys, apes, and humans.

The ancient toddler shows key anatomical features of A. afarensis, including a shoulder blade midway in shape between that of a human and a gorilla, along with features rarely seen, like a full set of both baby and adult teeth.

Now an analysis of thousands of anatomical features of modern and extinct mammals, as well as molecular sequences from living species, is helping them to do just that.

The study, published in the journal Current Biology, shows that the familiar anatomical features of birds — such as feathers, wings and wishbones — all first evolved piecemeal in their dinosaur ancestors over tens of millions of years.

The two new animals have already helped to fill important gaps in the evolution of the key anatomical features of dinosaurs.

A recent study by Allison Tripp of the University of Victoria in British Columbia, Canada, and Naomi Schmidt of New Mexico State University in Las Cruces demonstrated that female figurines from around 25,000 years ago have bodies of all shapes and sizes, not just the exaggerated anatomical features of the famous «Venuses» (Archaeology, Ethnology and Anthropology of Eurasia, vol 41, in press).

Based on the anatomical features of the fossil, Isthminia was either a close relative or ancestor of today's Amazon river dolphin (which probably invaded South America's river systems when sea - level rise expanded those habitats about 6 million years ago), or it was a descendant of an older and as - yet - undiscovered river dolphin that went back to sea.

Probably the most obvious «point of contention» would be a certain anatomical feature of the male Raccoons.

Not exact matches

The very fact that there are intermediate examples of anatomical features like wings only further validates the evolutionary law of gradualism.

At present, and based on what we know of the genetic regulation of development, these phenotypic changes in the gut are most likely the result of positive genetic changes in the genetic regulatory pathways controlling the development of the relevant anatomical features, i.e. they are novel positive, heritable genetic features producing a specific and functional novel anatomical structure within the Genus.

The long period of isolation under these parched conditions gave Bunostegos lineage time to evolve its unique anatomical features.

In the 1970s, however, archaeologists re-examining the remains noted that certain anatomical features, including the shape of the pelvis, suggested the skeleton belonged to a woman.

Based on the structure of Baby Louie's facial bones and other anatomical features, the team declared the dinosaur a new species.

Chilesaurus diegosuarezi has a puzzling mix of anatomical features that make it hard to classify.

For the Past 130 years, paleontologists divided dinosaurs into two groups, based on a handful of anatomical features — a split they believe occurred early in the animals» evolution more than 230 million years ago.

Previous research based on anatomical features hypothesized that butterflies are close relatives of large moths, but the new tree suggests butterflies are more closely related to small (micro) moths, Kawahara said.

Ward and her team found a styloid process at the end of a wrist bone more than 1.42 million years old, indicating this anatomical feature existed more than half a million years earlier than previously known.

The Venus figurines of women, some with exaggerated anatomical features, and ancient rock art, like the image from the Abri Castanet site in France that is supposedly of female genitalia.

Because most species of tarantula in the United States are very similar in appearance and can not be distinguished from each other using anatomical features alone, the research team implemented a modern and «integrative» approach to taxonomy by employing anatomical, behavioural, distributional, and genetic data.

Brewer calls up a picture of the brain of a person who actually has Alzheimer's, and I see that various anatomical features look as if they are smushed or blurred.

Later work confirmed that birds share dozens of anatomical features with theropods, and are especially similar to two families, the dromaeosaurs (including deinonychus) and troodontids.

These maps, they say, will show everything from relative sizes of anatomical features to differences in brains associated with age, race, gender, educational background, genetic composition, and other distinguishing characteristics.

The bones belong to a new species of pleurosaur whose anatomical features weren't fully adapted to water, but were on the way to enabling an aquatic lifestyle.

«While all of the anatomical details in the Misliya fossil are fully consistent with modern humans, some features are also found in Neandertals and other human groups,» said Quam, associate professor of anthropology at Binghamton.

The new analysis does not yet unseat the hippo as cetaceans» kissing cousin, because it only takes into account anatomical features, not molecular ones, says Maureen O'Leary, a professor in the department of anatomical sciences at Stony Brook University on Long Island, N.Y..

Too many species While tarantulas can vary greatly in size — from a leg span measuring about 6 inches (15 centimeters) long to tiny individuals able to fit comfortably on the face of a U.S. quarter — tarantula species generally don't vary much in their anatomical features.

The new Robojelly design, rolled out this week at the annual meeting of the American Physical Society's Division of Fluid Dynamics, incorporates an unusual anatomical feature: a jellyfish mud flap.

«There is a combination of anatomical features in the skeleton that simply aren't found in any form of Homo sapiens.»

Answering this question requires classifying neuronal activity patterns recorded from the brain, based on a number of statistical, dynamical and anatomical features and correlating them with observable behaviours, such as the presence or absence of rapid eye movements.

He rejects this hypothesis, reporting that the marks «bear no evidence of healing or callus formation» and are simply normal anatomical features.

As a result, various regions of the cancer can have unique features, even within the same anatomical site.»

Although anomalocaridids died out (and thus aren't the direct ancestors of any living arthropod lineage), they likely shared many anatomical features with close relatives living at the time that ended up on the surviving branches of life's family tree, he explains.

This can be done by taking information from the entire set of scans and using it to recreate anatomical features that are missing from other scans.

Instead of focusing on the pelvic bone, Baron and his team analysed 457 characteristics of 74 species and found that 21 other anatomical features divide the dinosaurs differently.

The team refers to the fossils» mixture of features as «anatomical mosaic».

Taking an ecological approach that considers the influence of anatomical and physiological features of the human host as well as the microorganisms» impact on both healthy and impaired individuals, the author surveys microbial communities that inhabit healthy humans.

This proximity in time, and anatomical features that appear to foreshadow those of early humans, have made Lucy's species the main contender as a direct ancestor of Homo.

They further argue that Darwinius lacks most of the key anatomical features that could demonstrate a close evolutionary relationship with living haplorhines (apes, monkeys, humans, and tarsiers).

It is also unfortunate that the entire face is missing which, if a hybrid, might have possessed anatomical features characteristic of a Neanderthal face.»

They also work as garbage collectors, chewing up dead cells and molecular debris strewn among living cells — including clusters of a protein called A-beta, notorious for aggregating into gummy deposits called Alzheimer's plaques, the disease's hallmark anatomical feature.

They also performed a comprehensive analysis of the evolutionary history of pterosaurs using the latest data and other anatomical features.

The team found part of a fossil human jaw with anatomical features that correspond to the modern human species Homo sapiens, as opposed to other pre-modern humans such as Neanderthals.

A: Schematic overview of anatomical features according to cresylviolet staining (shown in B, C and D) and tracing patterns in the thalamus.

Lectures 1 and 2: Anatomy of the Sacroiliac Joints covering the history of the SIJ, its relationship to the lumbar spine and hips, and the specific anatomical features that contribute to its stability bias yet paradoxically also allow for small degrees of mobility essential for optimal movement.

They avoid any sort of «one suits all» approach, deeply understanding your areas of improvement and anatomical features.

Taking a page from the recent Sherlock Homes features starring Robert Downey Jr. (which slowed fights down to showcase some of the physical movements involved), this feature often pauses to show the inner anatomical working of some of the characters here.

With her soft features and big brown eyes, Vikander is like the action heroine - as - girl next door, and she looks nothing like the Lara Croft of the video games, whose anatomical exaggerations and ridiculous clothing choices (hot pants and twin gun holsters, anyone?)

That old principle of squash and stretch, preached by Walt's Nine Old Men, is very much on display, especially in Arlo, who despite embodying some real anatomical features (like injured knees that won't properly bend) operates a bit more like TV's «Denver the Last Dinosaur» than The Land Before Time's Littlefoot.