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Posts treating: "sister taxon"

Tuesday, 24 February 2015

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Os plesiossauros e o pedomorfismo 

Lusodinos- Dinossauros de Portugal [2015-02-24 12:57:00]  recommend  recommend this post  (176 visits) info

 Cretaceous; BR,FR,AO,NL,NZ,PT,IN
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Os plesiossauros de Angola continuam a dar que falar. No estudo liderado por Ricardo Araújo, integrado no Projecto PaleoAngola, publicado no Netherlands Journal of Geosciences descrevem-se novos espécimes de plesiossauros elasmossaurídeos do Maastrictiano inferior de Angola. As análises filogenéticas colocam o táxone angolano como um elasmossaurídeo aristonectine e táxone-irmão de um plesiossauro da mesma idade da Nova Zelândia. Comparações também indicam uma estreita [...]

Nova espécie de plesiossauro do Cretácico de Angola 

Lusodinos- Dinossauros de Portugal [2015-01-25 16:37:00]  recommend  recommend this post  (191 visits) info

 Cretaceous; ZA,US,AO,NL,UM,BR,IN,AR
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Cardiocorax mukulu é o nome da nova espécie de plesiossauro escavada pelo Projecto PaleoAngola no Namibe, no sul de Angola. O artigo que saiu agora no Netherlands Journal of Geosciences é o resultado da dissertação de Ricardo Araújo (SMU) integrado no Projecto PaleoAngola e contou ainda com a participação de Mike Polcyn, Anne Schulp, Octávio Mateus, Louis Jacobs, Olímpio Gonçalves and Maria Luísa Morais, dos Estados Unidos, Holanda, Portugal e Angola.Os ossos coracóides desta [...]

Osteologia do saurópode Lusotitan atalaiensis 

Lusodinos- Dinossauros de Portugal [2013-04-05 15:45:00]  recommend  recommend this post  (25 visits) info

 Cretaceous,Jurassic
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O saurópode português Lusotitan atalaiensis é alvo de uma nova re-descrição anatómica, publicada no Zoological Journal of the Linnean Society. Mannion, P. D., Upchurch P., Barnes R. N., & Mateus O. (2013).  Osteology of the Late Jurassic Portuguese sauropod dinosaur Lusotitan atalaiensis (Macronaria) and the evolutionary history of basal titanosauriforms. Zoological Journal of the Linnean Society. 1-109. LINKAbstractTitanosauriforms represent a [...]

Summer at Petrified Forest National Park 

Crurotarsi: The Forgotten Archosaurs [2012-06-04 00:05:00]  recommend  recommend this post  (653 visits) info

 Triassic
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I have once again arrived at Petrified Forest National Park (PEFO) for the summer, doing paleontological field work with Bill Parker and several others. This year, we will be prospecting the new tract of land that was added to the park as well as reopening the Revueltosaurus quarry.Shortly after leaving the park last year, it expanded by 26,000 acres through the purchase of the Hatch Ranch. This area encompasses a large area to the east and northeast of Blue Mesa (including Ninemile Wash) as [...]

Shield Croc - Aegisuchus 

Crurotarsi: The Forgotten Archosaurs [2012-02-01 14:42:00]  recommend  recommend this post  (48 visits) info

 Cretaceous
  "Shieldcroc" (aka. Aegisuchus witmeri gen. et sp. nov.) has just been published by Casey Holiday and Nick Gardner at PLoS One. The large (approx. 1.5 meter skull, 9 meter body) eusuchian is a member of Aegyptosuchidae from the Late Cretaceous of northern Africa (Kem Kem Formation, Morocco). Holiday and Gardner find Aegyptosuchidae to be the sister taxon to Crocodylia, challenging the biogeographic hypothesis that crown-group crocodylians originated in Laurasia. The most striking feature [...]

O saurópode Supersaurus é o familiar mais próximo de Dinheirosaurus 

Lusodinos- Dinossauros de Portugal [2011-12-27 12:29:00]  recommend  recommend this post  (40 visits) info

 Cretaceous,Jurassic
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O saurópode gigante Supersaurus é o familiar mais próximo de Dinheirosaurus. Esta é uma das conclusões do estudo recentemente publicado no  Journal of Systematic Palaeontology, que redescreve o dinossauro português e o enquadra no contexto filogenético. O artigo também faz a revisão dos dinossauros diplodocídeos europeus.Vértebras do saurópode Dinheirosaurus lourinhanensis Bonaparte & Mateus 1999, expostas no Museu da LourinhãResumo em Inglês:Although diplodocoid [...]

SVP 2011 Roundup - Crocodylomorph Edition Part 2 

Crurotarsi: The Forgotten Archosaurs [2011-11-16 19:32:00]  recommend  recommend this post  (28 visits) info

 Neogene,Paleogene,Cretaceous,Jurassic
New Crocodylomorph Species and Specimens(in order of presentation)Talks" A new basal crocodylomorph from the Late Jurassic of Patagonia and its implications for the evolution of the crocodyloform braincase." Pol, D., Rauhut, O., Lecuona, A., and Leardi, J.Late Jurassic Canadon Caleareo Formation, Patagoniaposterior region of the skull, fragmentary remains of the rostrum, palate, mandible, and postcraniumunique combination of autapomorphies, crocodylomorph plesiomorphies, and crocodyliform [...]

Update: The coastal paleontologist gets married, and goes down under? 

The Coastal Paleontologist [2011-10-09 20:32:00]  recommend  recommend this post  (71 visits) info

 Paleogene
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The last couple of weeks have been pretty great, and due to being so busy in relation to recent events, I've been a little slow on posting new material on here. First and foremost, I got married to my longtime girlfriend/fiancee Sarah Michalies on September 17 up at beautiful Lake Tahoe, California. The wedding was fantastic, and a lot of fun - and there were many paleontology students from around North America in attendance. Sarah and I have been together since spring 2005, and it was about [...]

A new specimen of Parapontoporia 

The Coastal Paleontologist [2011-09-06 03:46:00]  recommend  recommend this post  (50 visits) info

 Neogene,Cretaceous
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Last fall I made a couple posts detailing an excavation (here and here) of a new odontocete skull from a relatively young (middle-late Pliocene) horizon in the Purisima Formation. This specimen was collected over a six hour period, and the excavation was pulled off and completed just before sunset. The specimen is still not completely prepared, but it does include a complete braincase, the posterior half of the rostrum, both petrotympanics (articulated petrosal and tympanics), and part of one [...]

Recent fieldwork in the Purisima Formation, Part 3: mysticete earbones and wildlife 

The Coastal Paleontologist [2011-09-02 00:02:00]  recommend  recommend this post  (33 visits) info

 Neogene
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Hey Folks, Sorry for yet another delay - I've been pretty busy, working on several manuscripts (a thesis-length paper on the Purisima Formation marine mammals from my undergraduate field area in Halfmoon Bay, a new manuscript on shark bitten cetacean bones, and my contribution to a paper of the mollusk and vertebrate assemblage of a late Miocene marine locality in Sonoma County), applying to the University of Otago Doctoral Program to work with R. Ewan Fordyce (in New Zealand), and digging up [...]

The hand of Steller’s sea cow, revisited 

Caribbean Paleobiology [2011-06-15 19:22:00]  recommend  recommend this post  (147 visits) info

 Neogene
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It’s been quite a while since my last post. A lot has been going on, mostly research-related, which is good. Just last week I was in San Diego where I participated in the Sixth Triennial Conference of Secondary Adaptation of Tetrapods to Life in Water held at San Diego State University. The meeting was a great opportunity to see colleagues as well as making new acquaintances, hat tip to the host committee: Annalisa Berta, Tom Deméré and Eric Ekdale for such a great meeting! The week before [...]
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