The Horror! The Horror! Larval Cthulhu Found in Peruvian Amazon

Deep in the Peruvian Amazon, an odd-looking caterpillar is doing its best to look like just another rain forest twig. But its four long tentacles are coiled, ready to respond to the first sign of danger.

link.

Two new Eocene Paleogene South American Platyrrhines Which Verify African Origin for New World Monkeys

Eocene primates of South America and the African origins of New World monkeys

Authors:

Bond et al

Abstract:

The platyrrhine primates, or New World monkeys, are immigrant mammals whose fossil record comes from Tertiary and Quaternary sediments of South America and the Caribbean Greater Antilles. The time and place of platyrrhine origins are some of the most controversial issues in primate palaeontology, although an African Palaeogene ancestry has been presumed by most primatologists. Until now, the oldest fossil records of New World monkeys have come from Salla, Bolivia, and date to approximately 26 million years ago, or the Late Oligocene epoch. Here we report the discovery of new primates from the ?Late Eocene epoch of Amazonian Peru, which extends the fossil record of primates in South America back approximately 10 million years. The new specimens are important for understanding the origin and early evolution of modern platyrrhine primates because they bear little resemblance to any extinct or living South American primate, but they do bear striking resemblances to Eocene African anthropoids, and our phylogenetic analysis suggests a relationship with African taxa. The discovery of these new primates brings the first appearance datum of caviomorph rodents and primates in South America back into close correspondence, but raises new questions about the timing and means of arrival of these two mammalian groups.

Evidence of air Pollution From Spanish Conquest of the Inca Found in Glacier Ice Cores

In the 16th century, during its conquest of South America, the Spanish Empire forced countless Incas to work extracting silver from the mountaintop mines of Potosí, in what is now Bolivia--then the largest source of silver in the world. The Inca already knew how to refine silver, but in 1572 the Spanish introduced a new technology that boosted production many times over and sent thick clouds of lead dust rising over the Andes for the first time in history.

Winds carried some of that pollution 500 miles northwest into Peru, where tiny remnants of it settled on the Quelccaya Ice Cap.

There it stayed--buried under hundreds of years of snow and ice--until researchers from The Ohio State University found it in 2003.

In the early online edition of the Proceedings of the National Academy of Sciences, they report discovery of a layer within a Quelccaya ice core that dates to the Spanish conquest of the Inca, contains bits of lead and bears the chemical signature of the silver mines of Potosí.

The core provides the first detailed record of widespread human-produced air pollution in South America from before the industrial revolution, and makes Quelccaya one of only a few select sites on the planet where the pre-industrial human impact on air quality can be studied today.

"This evidence supports the idea that human impact on the environment was widespread even before the industrial revolution," said Paolo Gabrielli, a research scientist at the Byrd Polar and Climate Research Center at Ohio State and corresponding author of the study.

Lonnie Thompson, Distinguished University Professor of earth sciences at Ohio State and co-author of the study, called the find "another keyhole into the past of human activity in that part of the world," and suggested that further investigation could ultimately help us better understand the fate of pollution circulating in the atmosphere today.

Previously, Thompson has called the Quelccaya ice cores a "Rosetta Stone" for gauging Earth's climate history. The samples were cut from ice that formed over 1,200 years as snow settled on the Peruvian Andes. Layer by layer, the ice captured chemicals from the air and precipitation during wet and dry seasons for all those years. Today, researchers analyze the chemistry of different layers to measure historical changes in climate.

For this study, the researchers used a mass spectrometer to measure the amount and type of chemicals present in the ice dating back to 800 AD. They looked for antimony, arsenic, bismuth, molybdenum and especially lead. That's because the refining process that the Spanish introduced to South America involved grinding silver ore--which contains much more lead than silver--into powder before mixing it with mercury in a process called amalgamation. So atmospheric pollution from silver production would chiefly contain traces of lead particulates.

The mass spectrometer revealed some spikes in the concentrations of these elements in the years before Spanish rule, but those layers all likely coincide with natural contamination sources, such as volcanic eruptions. Starting just before 1600, however, the Quelccaya ice began capturing much larger quantities of these elements, and the high amounts persisted until the early 1800s, when South American countries declared independence from Spain.

link.

Evidence of Albian/Cenomanian Cretaceous Environmental Pertubation From Peru

Record of Albian to early Cenomanian environmental perturbation in the eastern sub-equatorial Pacific

Authors:

Navarro-Ramirez et al

Abstract:

The present paper documents and discusses a new Albian–early Cenomanian carbon isotope (δ13Ccarb and δ13Corg) curve from the subequatorial Eastern Pacific in Peru. Chemostratigraphic evidences for the expression of the OAE1b set and for OAE1c and OAE1d are presented. This dataset is relevant inasmuch as previous work is strongly biased towards study sites in North America (Western Interior Basin), in Europe (Tethys) and the Pacific realm. A comparison of the carbon isotope stratigraphy obtained in Peru with published sections from the Central and Western Pacific, the Western Atlantic and Northern and Western Tethys reveals an overall good agreement supporting the global nature of the isotope patterns described here. The δ13C from Peru record is constrained by biostratigraphic evidence and 87Sr/86Sr isotope stratigraphy using well-preserved oyster shells. Furthermore, we document the development of a heterozoan epeiric-neritic mixed carbonate-siliciclastic ramp in the Western Platform of Peru and its corresponding sedimentary facies associations. This dataset was used to elucidate the complex interplay of climatic changes, nutrient supply, and platform drowning, leading to the following conclusions: (i) An upper Aptian–lower Albian major change from siliciclastic-dominated to carbonate sedimentation coincided with the impact of the Kilian Level. (ii) A lower Albian incipient platform drowning linked to the impact of the Paquier Level. (iii) A lower middle Albian major demise of neritic carbonate production that coincides with the Leenhardt Level, followed by middle Albian condensed sedimentation that reports prominent negative values in δ13Ccarb prior to the onset of OAE1c. (4) Finally, renewed carbonate ramp production during the upper Albian–lower Cenomanian. The data shown here represent the foundation for future work documenting the mid–Cretaceous of Peru and its implications for the palaeoceanography of the SE subequatorial Pacific.

Miocene Neogene Peruvian Amazon had Seven Different Crocodile Species

Thirteen million years ago, as many as seven different species of crocodiles hunted in the swampy waters of what is now northeastern Peru, new research shows. This hyperdiverse assemblage, revealed through more than a decade of work in Amazon bone beds, contains the largest number of crocodile species co-existing in one place at any time in Earth's history, likely due to an abundant food source that forms only a small part of modern crocodile diets: mollusks like clams and snails. The work, published today in the journal Proceedings of the Royal Society B, helps fill in gaps in understanding the history of the Amazon's remarkably rich biodiversity.

"The modern Amazon River basin contains the world's richest biota, but the origins of this extraordinary diversity are really poorly understood," said John Flynn, Frick Curator of Fossil Mammals at the American Museum of Natural History and an author on the paper. "Because it's a vast rain forest today, our exposure to rocks--and therefore, also to the fossils those rocks may preserve--is extremely limited. So anytime you get a special window like these fossilized "mega-wetland" deposits, with so many new and peculiar species, it can provide novel insights into ancient ecosystems. And what we've found isn't necessarily what you would expect."

Before the Amazon basin had its river, which formed about 10.5 million years ago, it contained a massive wetland system, filled with lakes, embayments, swamps, and rivers that drained northward toward the Caribbean, instead of today's pattern of eastward river flow to the Atlantic Ocean. Knowing the kind of life that existed at that time is crucial to understanding the history and origins of modern Amazonian biodiversity. But although invertebrates like mollusks and crustaceans are abundant in Amazonian fossil deposits, evidence of vertebrates other than fish have been very rare.

Since 2002, Flynn has been co-leading prospecting and excavating expeditions with colleagues at fossil outcrops of the Pebas Formation in northeastern Peru. These outcrops have preserved life from the Miocene, including the seven species of crocodiles discussed in Proceedings B. Three of the species are entirely new to science, the strangest of which is Gnatusuchus pebasensis, a short-faced caiman with globular teeth that is thought to have used its snout to "shovel" mud bottoms, digging for clams and other mollusks. The new work suggests that the rise of Gnatusuchus and other "durophagous," or shell-crunching, crocodiles is correlated with a peak in mollusk diversity and numbers, which disappeared when the mega-wetlands transformed into the modern Amazon River drainage system.

"When we analyzed Gnatusuchus bones and realized that it was probably a head-burrowing and shoveling caiman preying on mollusks living in muddy river and swamp bottoms, we knew it was a milestone for understanding proto-Amazonian wetland feeding dynamics," said Rodolfo Salas-Gismondi, lead author of the paper and a graduate student at the University of Montpellier, in France, as well as researcher and chief of the paleontology department at the National University of San Marcos' Museum of Natural History in Lima, Peru.

Besides the blunt-snouted crocodiles like Gnatusuchus, the researchers also recovered the first unambiguous fossil representative of the living smooth-fronted caiman Paleosuchus, which has a longer and higher snout shape suitable for catching a variety of prey, like fish and other active swimming vertebrates.

"We uncovered this special moment in time when the ancient mega-wetland ecosystem reached its peak in size and complexity, just before its demise and the start of the modern Amazon River system," Salas-Gismondi said. "At this moment, most known caiman groups co-existed: ancient lineages bearing unusual blunt snouts and globular teeth along with those more generalized feeders representing the beginning of what was to come."

link.

The Diet of the PreColumbian Peruvian Mummies of the Paracas Necropolis

Paleodiet in the Paracas Necropolis of Wari Kayan: carbon and nitrogen isotope analysis of keratin samples from the south coast of Peru

Authors:

Knudson et al

Abstract:

Despite being one of the most famous archaeological cemeteries in Peru, many questions remain about the people who were buried at the Paracas Necropolis of Wari Kayan, which was first excavated by Julio C. Tello in 1925. Here, we use bioarchaeology and biogeochemistry to elucidate the lives of individuals buried at Wari Kayan. More specifically, we present 90 new δ13Ckeratin and δ15Nkeratin values from 14 individuals buried at Wari Kayan and two artifacts made of human hair (mean δ13Ckeratin (VPDB) = −15.3 ± 0.9‰ (1σ, n = 90) and mean δ15Nkeratin (AIR) = +15.5 ± 1.2‰ (1σ, n = 90)). We interpret these light stable isotope data from archaeological human hair samples from the Paracas Necropolis of Wari Kayan as evidence for a mixed diet of C4 and C3 foods as dietary carbon sources and marine products as dietary nitrogen sources. Sequential hair samples from the same individuals do not exhibit large isotopic differences in hair that formed at different times before death. In addition to elucidating paleodiet at this important site, we interpret sequential isotopic hair data as evidence of a population whose diet was predominately coastal in the last weeks or months of life, either remaining on the coast or consuming coastal products in the highlands. These data elucidate paleodiet as well as the utility of applying newer isotopic methods to archaeological human remains from older museum collections to gain a better understanding of the past.

Middle Miocene Neogene Mammals From Proto-Amazonia

Life in proto-Amazonia: Middle Miocene mammals from the Fitzcarrald Arch (Peruvian Amazonia)

Authors:

Tejada-Lara et al

Abstract:

The Middle Miocene has been identified as a time of great diversification in modern lineages now distributed in tropical South America, and when basic archetypal traits defining Amazonia appear, including climatic humid conditions, basic floral physiognomy and phylogenetic composition of modern rainforests. Nonetheless, Middle Miocene localities in South America are poorly known, especially at low latitudes where only one species-rich locality, La Venta in Colombia, has been extensively studied. The present contribution describes the mammal fauna of Fitzcarrald, a new Middle Miocene local fauna from western Amazonia in Peru. Fitzcarrald is correlated with the Laventan South American Land Mammal Age based on the presence of taxa defining the ‘Miocochilius assemblage zone’ in La Venta. The mammalian fauna of Fitzcarrald comprises 24 taxa among cingulates, folivores, astrapotheres, notoungulates, litopterns, rodents, odontocetes and a possible marsupial. At this time, tropical South America was characterized by the presence of the Pebas megawetland, a huge lacustrine complex that provided unique ecological and environmental conditions most likely isolating northern South America from southern South America. These isolating conditions might have come to an end with its disappearance in the Late Miocene and the establishment of the subsequent Acre system, the predecessor fluvial system of modern Amazonia. Results of faunistic similarity between Fitzcarrald and other Miocene faunas throughout South America support these scenarios. The Fitzcarrald mammal fauna exhibits first appearance datums and last appearance datums of various taxa, showing that tropical South America has played a crucial role in the evolutionary history and biogeography of major clades, and revealing a more complex biological history than previously proposed, based on the record from the southern cone of the continent.

Basal Monkeys From Eocene Paleogene Amazonian Peru Link New World Monkeys to Old World Monkeys

Eocene primates of South America and the African origins of New World monkeys

Authors:

Bond et al

Abstract:

The platyrrhine primates, or New World monkeys, are immigrant mammals whose fossil record comes from Tertiary and Quaternary sediments of South America and the Caribbean Greater Antilles. The time and place of platyrrhine origins are some of the most controversial issues in primate palaeontology, although an African Palaeogene ancestry has been presumed by most primatologists. Until now, the oldest fossil records of New World monkeys have come from Salla, Bolivia, and date to approximately 26 million years ago , or the Late Oligocene epoch. Here we report the discovery of new primates from the ?Late Eocene epoch of Amazonian Peru, which extends the fossil record of primates in South America back approximately 10 million years. The new specimens are important for understanding the origin and early evolution of modern platyrrhine primates because they bear little resemblance to any extinct or living South American primate, but they do bear striking resemblances to Eocene African anthropoids, and our phylogenetic analysis suggests a relationship with African taxa. The discovery of these new primates brings the first appearance datum of caviomorph rodents and primates in South America back into close correspondence, but raises new questions about the timing and means of arrival of these two mammalian groups.

Spanish Conquest Caused Changes to the Coast-line of Peru

Effect of the Spanish Conquest on coastal change in Northwestern Peru

Authors:

Belknap etal

Abstract:

When Francisco Pizarro and his small band of Spanish conquistadores landed in northern Peru in A.D. 1532 to begin their conquest of the vast Inca Empire, they initiated profound changes in the culture, language, technology, economics, and demography of western South America. They also altered anthropogenically modulated processes of shoreline change that had functioned for millennia. Beginning with the extirpation of local cultures as a result of the Spanish Conquest, and continuing through today, the intersection of demography, economy, and El Niño-driven beach-ridge formation on the Chira beach-ridge plain of Northwestern Peru has changed the nature of coastal evolution in this region. A similar event may have occurred at about 2800 calibrated y B.P. in association with increased El Niño frequency.

A 2300 Year old Astronomical Complex in Chincha Valley, Peru

A 2,300-year-old architectural and astronomical complex in the Chincha Valley, Peru

Authors:

Santish et al

Abstract:

Recent archaeological research on the south coast of Peru discovered a Late Paracas (ca. 400–100 BCE) mound and geoglyph complex in the middle Chincha Valley. This complex consists of linear geoglyphs, circular rock features, ceremonial mounds, and settlements spread over a 40-km2 area. A striking feature of this culturally modified landscape is that the geoglyph lines converge on mounds and habitation sites to form discrete clusters. Likewise, these clusters contain a number of paired line segments and at least two U-shaped structures that marked the setting sun of the June solstice in antiquity. Excavations in three mounds confirm that they were built in Late Paracas times. The Chincha complex therefore predates the better-known Nasca lines to the south by several centuries and provides insight into the development and use of geoglyphs and platform mounds in Paracas society. The data presented here indicate that Paracas peoples engineered a carefully structured, ritualized landscape to demarcate areas and times for key ritual and social activities.

Peru's Own Petrified Forest...with a view!

The fossilized remains of a South American forest buried by volcanic ash are providing scientists with a detailed look at a tropical forest ecosystem from millions of years ago.

The petrified forest, known as El Bosque Petrificado Piedra Chamana, covers a 1-by-0.5-kilometer area in northwestern Peru, Deborah Woodcock, a paleoclimatologist at Clark University in Worcester, Mass., and her colleagues report in the July-August GSA Bulletin. Fossils at the site include both large tree trunks and leaves — a rarity for low-latitude forests, since tropical heat dramatically accelerates the decomposition of organic matter. Analyses of leaf size and shape hint that the average annual temperature at the site around 39.4 million years ago, when the forest was growing, was above 25° Celsius.

Some of the fossils are 1-meter-tall stumps, still standing upright with their petrified roots preserved in the ancient, now-solidified soil. Many of the other fossils are logs that lie oriented along a northwest-southeast direction. Together, these data suggest that the forest was buried waist-deep in volcanic ash from a nearby eruption and then smothered by a flow of ash that snapped the trees off and entombed them, Woodcock says.

cool.

5 Million Year Old Ground Sloth Found

The nearly intact fossil of an ancient sloth that lived 5 million years ago has been unearthed in Peru, a find about 4 million years older than similar ones discovered in the Americas, researchers said.

The sloth was found beneath the cement floor of a house in the Andean region of Espinar in southern Peru when workers were installing a water system. Parts of a giant armadillo that has also been dated to 5 million years ago were also found nearby.

The sloth, about 10 feet long, was an herbivore and lived during the Mio-Pliocene era, said paleontologist Rodolfo Salas of Peru's Natural History Museum and one of the scientists on the dig sponsored by the French government.

"This skeleton of the sloth is especially important as it is the first complete skeleton of its kind that is 5 million years old in the Americas," he told Reuters. "Previously, discoveries have been made of partial skeletons of similar animals, but from the Pleistocene era, meaning from the last million years."

The sloth was found at 13,000 feet above sea level.

No time for commentary. Just to clarify though this is probably a Pliocene critter, but it does come close to being Miocene. The comment of Mio-Pliocene might have been a slip or a self correction that the reporter repeated verbatim.

I really wish more of Xenarthra had made it into modern times in the New World. Or to be more specific more of Pilosa.

TOOTHED Miocene Bird?

Paleontologists working in Peru have found a fossil from a bird that lived 10 million years ago, scientists said on Friday after returning from the dig site on the country's desert coast.

The species of bird had a wing span of 19.7 feet and fed mostly on fish from the Pacific Ocean. It first appeared 50 million years ago and was extinct about 2.5 million years ago because of climate change, paleontologist Mario Urbina of Peru's Natural History Museum said.

Scientists discovered a rare fossil of the bird's head in Ocucaje, in the Ica region of Peru's southern coast, where an arid climate has preserved many fossils.

"The cranium of the bird, from the Pelagornithidae family, is the most complete find of its kind in the world. Its fossil remains are hard to find," Urbina said.

Old ocean seabeds in the area have been a treasure trove for fossil hunters.

"This site had marine sediments. The fossil was found with other remains from whales, sharks and turtles," Urbina said.

At the time of the bird's death, Peru's coast was hot and rainy, but millions of years later, it turned cool and dry, he said.

The fossil is 15.7 inches long and will go on display on Saturday at the museum.

The bird had some peculiar characteristics, including teeth at the tip of its beak and large wings that were less efficient than those of contemporary birds.

Toothed bird? Someone have a link an image of the skull?

The Chtorran Invasion Has Begun!

Villagers in southern Peru were struck by a mysterious illness after a meteorite made a fiery crash to Earth in their area, regional authorities said Monday.

Around midday Saturday, villagers were startled by an explosion and a fireball that many were convinced was an airplane crashing near their remote village, located in the high Andes department of Puno in the Desaguadero region, near the border with Bolivia.

Residents complained of headaches and vomiting brought on by a "strange odor," local health department official Jorge Lopez told Peruvian radio RPP.

Seven policemen who went to check on the reports also became ill and had to be given oxygen before being hospitalized, Lopez said.

Or is it the start of World War Z? I always get those confused. ;)