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From the album: Hell Creek / Lance Formations
Avisaurus cf. archibaldi Hell Creek Fm., Garfield Co., MT, USA More information Avisaurus is an extinct, toothed Enantiornithine bird that lived at the very end of the Cretaceous. It likely held a similar niche that hawks/eagles do today, preying on small vertebrates like lizards and mammals. -
Janavis finalidens: a new 67 mya old bird described from the late cretaceous of Belgium
ziggycardon posted a topic in Fossil News
Came accross this news shared by the NHM Maastricht, another fossil bird has been discribed from the same quarry and layer in which the famous wonderchicken "Asteriornis" was found. This being the Romontbos quarry in Eben-Emael in Belgium (near de border with Maastricht in the Netherlands) which dates to the Late Maastrichtian era (66,7 mya) Here are some links to the news articles (both in english as in dutch) as well as as video. https://www.theguardian.com/science/2022/nov/30/ct-scans-toothed-bird-fossil-jaw-mobile-palate-avian-evolution https://www.bbc.com/news/uk-england-cambridgeshire-63809867 https://www.nature.com/articles/d41586-022-04181-7 https://www.nature.com/articles/d41586-022-03692-7 https://www.science.org/content/article/new-look-ancient-jaw-fossil-rewrites-bird-evolution Dutch article: https://www.1limburg.nl/nieuws/1890918/fossiel-van-vogel-met-tanden-ontdekt-in-sint-pietersberg-
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First fossil bird ever found with an unlaid egg preserved inside the body. Very cool Article https://natureecoevocommunity.nature.com/users/247587-alida-bailleul/posts/45802-an-egg-found-inside-a-fossil-bird-by-accident Paper https://www.nature.com/articles/s41467-019-09259-x?fbclid=IwAR3Vqeb0k6SHIFoWZYeEOEvgjKWE7MP59-nvYg_McQiPZCan2l0tHkouI78 @Auspex
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Here is paper you might find interesting as it regards a possible geographic origin of early birds and mammals: Sven Kurbel (2013) Hypothesis of homeothermy evolution on isolated South China Craton that moved from equator to cold north latitudes 250 to 200 Myr ago. Journal of Theoretical Biology (advance online publication) doi: http://dx.doi.org/10.1016/j.jtbi.2013.09.018 http://www.sciencedirect.com/science/article/pii/S0022519313004463 While the climate of southern China during the Early Jurassic provides a window into the geographic origins of homeothermic animals (mammals, birds), the problem with the validity of the hypothesis is that all Early Jurassic theropod dinosaurs found in South China are non-tetanuran (although theropod footprints in Inner Mongolia suggest that there may be Early Jurassic theropod body fossils waiting to be found in Inner Mongolia) and that the oldest paravians (Pedopenna, Xiaotingia, Eosinopteryx, Aurornis) are of Middle-Late Jurassic age. However, it's not hard to imagine a Middle Jurassic paravian occurring in South China because the Oxfordian-age alvarezsaur Haplocheirus is closer to paravians, therizinosaurs, and oviraptorosaurs than to any other coelurosaur group. Only time will they if the hypothesis of an Asian origin for Avialae based on climatic conditions in southern China during the Early Jurassic is valid.
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Hi all just read this article in this mornings paper, just goes to show that i still have a chance of getting one of my 3 different fossil penguins named after me. with help http://www.stuff.co.nz/the-press/news/8323696/Skull-of-worlds-oldest-penguin-found http://www.stuff.co.nz/timaru-herald/news/6516948/Penguin-fossils-offer-chance-of-a-lifetime there is possibly more out there