http://www.mycanadagoosejacket.org canada goose outlet Canada Goose Parka Earliest evidence of birds visiting flowers Why Evolution Is True Canada Goose Parka
canada goose coats on sale Mayr and Wild report a new bird fossil from the famous Messel formation of Germany. The specimen, Pumiliornis tessellatus, is remarkably well preserved as a canada goose coats uk complete skeleton and is dated at roughly 47 canada goose outlet store uk million years, in the canada goose outlet online store review middle Eocene. It is not a member of any of thethree modern groups of birds that independently evolvedthe ability to eat nectar and pollen:hummingbirds, lorikeets +hanging parrots, and some groups of the Passeriformes ( birds, whose nectar and pollen eaters include sunbirds, honeycreepers, etc.).The canada goose outlet niagara falls remarkable thing about this specimen, as shown in the photo below, is that there is a clump of pollen grains near the femur right where the stomach would be in a living bird. Although there are canada goose outlet houston also a few canada goose jacket uk insect parts (perhaps accidentally ingested along with the pollen), the number of grains, their clumping, and their position suggests that this bird was in fact eating pollen. Notice the wonderful feather impressions in the fossil below:Here are some scanning electron microscope (SEM) photos of the fossilized pollen:The other clue that this bird didn accidentally eat pollen, and was adapted to a flower feeding lifestyle, comes from its appearance. It has a long beak and enlarged nasal openings characteristic ofmodern birds canada goose clothing uk that sip nectar, and ithas feet, meaning that the fourth toe could be turned backwards a trait of perching birds that climb branches and flower stems. The 1 toe is the one you should canada goose outlet new york city look at in the photo below:Now it not clear if pollen was the primary object of this bird diet, was ingested accidentally while drinking nectar, or if the bird ate both pollen and nectar. What is pretty clear is that by the middle Eocene, when this bird lived, birds had already evolved to use as food flowering plants that had been around for over 100 million years.This pushes back the earliest known bird/nectar/pollen interaction by 17 million years, as heretofore the earliest such specimen dated at about 30 mya.Gerald Mayr and Volker Wilde. 2014. Eocene fossil is earliest evidence of flower visiting by birds. Biol Lett 2014 10: 20140223One of many thousands from the site!This exceptional preservation is because the animals at Messel were killed either by noxious gas (CO2 released from the bottom of the crater lake) or toxic water (seasonal cyanobacteria blooms), and buried in ultra fine sediment where no scavengers could live. The deposit was never buried terribly deep so the shale is quite soft and moist, and canada goose outlet store montreal crumbles to dirt if it dries out; to prevent this, fossils are prepared by the method. scrubbing with a wire brush in the case of common fish fossils). Feathers, hair etc. show up quite well as dark stains against the pale yellowish resin.For most canada goose outlet new york kinds of fossil, this epoxy method works beautifully. I found it unsuitable for snakes (where it really useful to be able study disarticulated vertebrae in the round; wax would have been preferable), but with modern HRXCT methods that should no longer canada goose outlet vip be a problem.This does raise an interesting question, though. If canada goose outlet buffalo collection canada goose outlet 2015 technology is still evolving, then might science be better served in the long run by leaving some fossils in the ground to await better collection methods?I imagining some sort of portable CT or 3D ultrasound canada goose uk scanner capable of seeing canada goose outlet seattle right inside rock at high resolution. Would future paleontologists equipped with such devices thank us for breaking open and grinding down valuable specimens that they might have extracted canada goose outlet online store more information from?Vertebrate palaeontologists have spent time daydreaming about portable scanners for decades, and there are some real examples the in ground seismic scan in the first Jurassic Park movie wasn pure science fiction. still inside plaster field jackets) is easier than doing it in the field, canada goose outlet parka and becoming quite common.Most fossil digs are just scratching the surface of large deposits (dependent on natural erosion to expose sparse remains) so there plenty left for the future, but of course there are many cases where the deposit is limited (cave and fissure fills, deposits in small ancient pools and channels, burrows, nest sites) and the practice is usually to leave at least half in the ground (or unprepared if it must be removed) for future studies. Leaving it in the ground can be a canada goose outlet 80 off dead loss in the case of rapidly eroding sites, or salvage digs where the deposit going to be dug up for a highway or building foundation.The Messel oil shale was mined for petroleum during WWII, but it was low grade and inefficient; then canada goose outlet toronto location commercial fossil collectors had several decades of open slather to play with the site, till the early 90 when there were plans to use the pit for landfill, stopped by the World Heritage listing. canada goose outlet michigan Collecting is now carefully regulated and small scale (the Senckenberg Institut and Hessisches Landesmuseum are the main groups involved, though there are other important collections), but most of the research being published is based on more detailed study of specimens collected decades ago that have been sitting canada goose factory outlet vancouver in museum drawers or private collections.Was this in a tropical climate where there might be flowering plants all year?The paper is free to download, but doesn particularly address the environment of the Messel deposit. Since it a very well studied deposit, they obviously don feel the need to expend column inches on that topic. If you remember canada goose outlet ontario some hype a couple of years ago about a novel Eocene primate fossil, Something somethingicus Darwinii, nick named ; that from the same deposit.Bristol University has a page on Messel ecology, including the snippet that means literally warehouse (having tried to find the stationery cupboard in a Norwegian office one day doesn just mean a cold, top brewed amber nectar to me any more), and the more climatological statement thatPlants Lake Messel was situated in a dense rainforest, shown by the presence of preserved plant material, including palm leaves, fruits, wood, pollen and some water plants.The Unesco record justifying it World Heritage status says location of the Eocene Lake Messel lay south of its present canada goose jacket outlet toronto position. This accounts for the site appearing to have had a tropical to subtropical climate. The Senckenberg Museum (somewhere in Germany, probably near Messel) held a conference on Messel in 2011, and make 17MB of conference proceedings available from here. A whole day canada goose stockists uk of the conference studied the deposit environment, with papers titled (for example, Messel, an extraordinary archive for the middle Eocene canada goose outlet online uk greenhouseclimate In short canada goose outlet ottawa it was a warm to hot, damp climate. Seasonality is a more complex question warm versus cool, or dry versus wet?.In regards of the Messel fossil, then clearly there is a selection bias operating. Less so in our industrial work. For substantial intervals of the well, every (that not sample from the wellbore, each one aggregating rocks taken from successive intervals of the well, gets passed to the watchers for study. Of the order of a thousand samples per well, and a thousand fossils per samples, for a million data points per well, each in a reasonably well constrained geological context canada goose coats on sale.
