[ZBIORCZY] DINOZAURY - NOWE INFORMACJE 2006-2009

Czyli co piszczy w paleontologicznej "trawie" :)
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Daniel Madzia
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[ZBIORCZY] DINOZAURY - NOWE INFORMACJE 2006-2009

Post autor: Daniel Madzia »


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Sebastian
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Post autor: Sebastian »

Na jakiej podstawie uznano go za najstarszego dinozaura? Jeszcze jedno pytanie, ciekawi mnie nazwa i pokrewie??stwo tego gada.

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dilong
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Post autor: dilong »

No w??a??nie, tak samo m??wili o silezaurze, a teraz uwa??a siÄ? go za dinozauromorfa.
Geologia UW

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Daniel Madzia
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Europejski stegozaur!

Post autor: Daniel Madzia »

Escaso, F; Ortega, F.; Dantas, P.; Malafaia, E.; Pimentel, N.L; Pereda-Suberbiola, X.; Sanz, J.L.; Kullberg, J.C.; Kullberg, M.C.; Barriga, F. (now online, in paper 2007) New Evidence of Shared Dinosaur Across Upper Jurassic Proto-North Atlantic: Stegosaurus From Portugal. Naturwissenschaften

Abstract: More than one century after its original description by Marsh in 1877, we report in this paper the first uncontroversial evidence of a member of the genus Stegosaurus out of North America. The specimen consists of a partial skeleton from the Upper Jurassic of Portugal herein considered as Stegosaurus cf. ungulatus. The presence of this plated dinosaur in both, the upper Kimmeridgian-lower Tithonian Portuguese record, and synchronic levels of the Morrison Formation of North America, reinforces previous hypothesis of a close relationship between these two areas during the Late Jurassic. This relationship is also supported by geotectonic evidences indicating high probability of an episodic corridor between Newfoundland and Iberian landmasses. Together, Portuguese Stegosaurus discovery and geotectonic inferences could provide a scenario with episodical faunal contact among North-Atlantic landmasses during the uppermost Kimmeridgian- lowermost Tithonian (ca. 148-153 Ma ago).

KrzysiekLichota
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Post autor: KrzysiekLichota »

Stegozaury ??y??y w Portugalii....do czego to ju?? dosz??o...
ciekawe...
czy jest znany jego epitet gatunkowy?? czy by?? wiÄ?kszy czy mniejszy od swego ameryka??skiego krewniaka??

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dilong
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Post autor: dilong »

To jest pewny dow??d na to ??e ??lady tyreofora z Ba??towa w 100% nale??Ä? do stegozaura.
Geologia UW

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Krzysztof
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Post autor: Krzysztof »

dilong pisze:To jest pewny dow??d na to ??e ??lady tyreofora z Ba??towa w 100% nale??Ä? do stegozaura.
Ale, przecie?? nie uda??o siÄ? odkryÄ? ??Ä?dnych skamienia??osÄ?i, to fragmenty skamienia??osÄ?i sladowych sÄ? wystarczajÄ?ce do zakwalifikowania do jakiego rodzaju nale??a??o zwierze.

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dilong
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Post autor: dilong »

Lecz ten ??lad sklasyfikowano do rodzaju Stegosaurus, lecz dopiero skamieniale ko??ci stegozaura z Portugalii ca??kowicie potwierdzili klasyfikacjÄ? ??ladu tego tyreofora.
Geologia UW

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Sebastian
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Post autor: Sebastian »

Czy mo??ecie przet??umaczyÄ? na polski? Czy sÄ? jakie?? fotosy ko??ci?

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Krzysztof
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Post autor: Krzysztof »

Sebastian pisze:Czy mo??ecie przet??umaczyÄ? na polski? Czy sÄ? jakie?? fotosy ko??ci?
Nie ma skamienia??osci, sÄ? tylko tropy tego stegozaura.

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Sebastian
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Post autor: Sebastian »

No to siÄ? zawiod??em :? Ale to nic, kto to przet??umaczy :?:

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Krzysztof
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Post autor: Krzysztof »

Sebastian pisze:No to siÄ? zawiod??em :? Ale to nic, kto to przet??umaczy :?:
Sorry, nie zroumialem tego pytania ale bede musial dokladnie poczytac.

Uwazalem ??e, to pytanie dotyczy siÄ? tropow polskiego stegozaura.

d_m

Post autor: d_m »

dilong pisze:Lecz ten ??lad sklasyfikowano do rodzaju Stegosaurus, lecz dopiero skamieniale ko??ci stegozaura z Portugalii ca??kowicie potwierdzili klasyfikacjÄ? ??ladu tego tyreofora.
Skamienia??e ??lady dinozaur??w otrzymujÄ? swoje nazwy i nie sÄ? raczej przypisywane do konkretnych rodzaj??w dinozaur??w. ZresztÄ? - stegozaur z Portugalii nie mo??e byÄ? dowodem w sprawie trop??w z Polski.

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USA zatrzyma??o przemyt gniazda dinozaur??w

Post autor: Dino »

LOS ANGELES - Customs agents have seized fossilized dinosaur eggs believed to have been smuggled illegally from China and auctioned for $420,000, officials said Thursday.
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The 22 eggs, each 65 million years old, were so well-preserved that embryonic raptors are visible inside 19 of them. They were seized late last week from the Bonhams & Butterfields auction house in Los Angeles.

The eggs were auctioned in December to an undisclosed buyer, but the transaction was scrubbed before money changed hands after concerns were raised about the legality of their export.

"That sale was canceled and the property turned over to the U.S. government," said Levi Morgan, a spokesman for the auction house in San Francisco.

The eggs were found in China's Guangdong province in 1984, shipped to Taiwan and in 2004 to an American collector in Florida, according to a customs agent's affidavit filed last month in federal court.

Authorities found that the shipper in Taiwan had no paperwork to prove the fossil was legally transferred from China, and that an invoice falsely described the items as being from Taiwan and worth only about $500, according to U.S. Immigration and Customs Enforcement.

Morgan said the auction house essentially had to trust that the American seller had the legal right to consign the eggs, because it isn't able to verify export documents.

No arrests have been made, but the auction house is cooperating with the investigation.

Customs agents are holding the eggs as evidence, but "the goal is to return them to China," spokeswoman Virginia Kice said.
http://news.yahoo.com/s/ap/20070216/ap_ ... Y7eTF7hMgF
Obrazek

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Daniel Madzia
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Tyranozaur z kampanu?

Post autor: Daniel Madzia »

Ciekawe :)

Urban, M.A., and Lamanna, M.C. 2007. Evidence of a giant tyrannosaurid (Dinosauria: Theropoda) from the Upper Cretaceous (?Campanian) of Montana. Annals of the Carnegie Museum 75(4):231-235.

ABSTRACT: We report an isolated right lacrimal of a tyrannosaurid theropod dinosaur, probably from the Upper Cretaceous (upper Campanian) Judith River Formation of Fergus County, Montana. The lacrimal was originally associated with the holotype of the giant crocodylian Deinosuchus rugosus, but was later identified as that of a tyrannosaurid. It is of comparable size to the corresponding element in the gigantic Maastrichtian tyrannosaurid tyrannosaurus. Moreover, comparison of the lacrimal to those of other tyrannosaurids tentatively supports its referral to this genus. Consequently, provided that its stratigraphic provenance has been correctly identified, the specimen represents the oldest-known North American record of a tyrannosaurus-sized tyrannosaurid, and possibly the most ancient occurrence of this genus yet documented.

d_m

Post autor: d_m »

Ciekawe. Nie jestem paleontologiem, ale do??Ä? sceptycznie podchodzÄ? do tych rewelacji. Nie mam oryginalnego artu, ale problem z datowaniem i fakt, ??e ko??Ä? by??a stowarzyszona w kolekcji ze skamienia??o??ciami krokodyla, mo??e wskazywaÄ? na to, ??e mamy po prostu do czynienia z jakim?? dawno znalezionym, a ??le opisanym, w z??e miejsce od??o??onym, okazem. No ale wypowiadam siÄ? w ciemno :) A je??li autorzy artyku??u majÄ? racjÄ?, to tym lepiej :)

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dilong
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Post autor: dilong »

Chyba zn??w siÄ? zaczyna paleontologiczny sezon og??rkowy.
Geologia UW

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Daniel Madzia
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Post autor: Daniel Madzia »

Dawid Mazurek pisze:(...)
Okaz byl zebrany przez kolekcjonera skamienialosci z Carnegie Museum W.H. Utterbacka podczas ekspedycji paleontologicznej w 1903 r. prawdopodobnie na formacji Judith River (~75 Ma). Choc pewne to do konca nie jest. Zidentyfikowana jako prawa kosc lzowa byla dopiero przez Russella w 1983 r. Przed tem myslano, ze chodzi o skamienialosc deinosucha (choc w rzeczywistosci Holland o niej w swej publikacji gigantycznego krokodyla z 1909 r. nie pisze). Tak na dobra sprawe z korespondencji miedzy Utterbackiem i Hatcherem, ktory Utterbacka o skamienialosciach poinformowal (pozniej na jego czesc otrzymal Deinosuchus epitet gatunkowy), nie jest stuprocentowo pewne czy lacrimale zostala zebrana z Willow Creek (datowanej na kampan) czy tez maastrychtskich sedymentow. Utterback jeszcze przed wyruszeniem do miejsc, o ktorych zostal poinformowany, prawdopodobnie udal sie na formacje Hell Creek... wiec nie jest wykluczone, ze wlasnie stad kosc pochodzi.

Podsumywujac sprawe - badania sa ciekawe, ale rzeczywiscie moze chodzic o kosc lzowa tyranozaura z Hell Creek, ktora sie pozniej przyplatala miedzy material z Judith River.

Artykul na WP.

d_m

czy "prozauropody" rzeczywi??cie by??y czworono??n

Post autor: d_m »

Bonnan, M. & Senter, P. 2007. Were the basal sauropodomorph dinosaurs Plateosaurus and Massospondylus habitual quadrupeds? W: Barrett, P.M. & Batten, D.J. (eds.) Evolution and Palaeobiology of Early Sauropodomorph Dinosaurs. Special Papers in Palaeontology 77, str. 139-155. Palaeontological Association, London.
The basal sauropodomorph dinosaurs Plateosaurus and Massospondylus are often portrayed as habitual quadrupeds that were facultatively bipedal. Surprisingly, the functional morphology of their forelimbs has rarely been considered when reconstructing their locomotor habits. If Plateosaurus and Massospondylus were efficient, habitual quadrupeds we predict that the manus would have been pronated such that it produced a caudally directed force in parallel with the pes. We articulated and manipulated the forelimbs of Plateosaurus, Massospondylus and several extant outgroup taxa (Varanus, Alligator, Anser and Struthio) using a standardized protocol. Moreover, we compared our results with previously published estimates of forelimb movement in saurischian outgroup taxa from Theropoda and Sauropoda and with the basal sauropodomorph/sauropod Melanorosaurus. Our results indicate that the range of motion in the forelimbs of Plateosaurus and Massospondylus did not allow efficient, habitual quadrupedal locomotion. The range of humeral flexion and abduction is limited and the articular surfaces of the radius and ulna orient the palmar surfaces of the manus medially in semi-supination. Active or passive pronation of the manus was not possible and the manus could not function in a dynamically similar way to the pes for efficient quadrupedal locomotion. Our results also rule out specialized forms of quadrupedal locomotion, such as the knuckle-walking gait of some mammals. We suggest that most known "prosauropod" trackways were probably not made by animals such as Plateosaurus or Massospondylus, but the ichnotaxon Otozoum may have been created by animals similar to these taxa. Furthermore, we show that trunk and limb ratios do not yield consistent results and should not be used solely to determine posture. Although these two taxa probably assumed a quadrupedal posture as hatchlings, we show that the morphological orientations of the forelimb elements remained consistent across ontogeny, precluding efficient, quadrupedal locomotion at any age. As with theropods, forelimb use in basal sauropodomorphs is difficult to reconstruct and interpret. We speculate that the forelimb could have aided in acquiring vegetation or defence in Plateosaurus and Massospondylus only if these animals reared or assumed a tripodal posture.

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Daniel Madzia
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Kolejne nowe badania

Post autor: Daniel Madzia »

Upchurch, P., Barrett, P.M., and Galton, P.M. 2007. A phylogenetic analysis of basal sauropodomorph relationships: implications for the origin of sauropod dinosaurs; pp. 57-90 in Barrett, P.M. and Batten, D.J. (eds.), Evolution and Palaeobiology of Early Sauropodomorph Dinosaurs. Special Papers in Palaeontology 77. Palaeontological Association, London.

ABSTRACT: New discoveries, revision of existing taxa and the application of cladistic analysis have all shed light on the relationships of basal sauropodomorphs. Nevertheless, the interrelationships proposed in recent studies have varied widely, with some authors advocating the view that Prosauropoda and Sauropoda are monophyletic sister-taxa, whereas others favour an extreme form of prosauropod paraphyly with respect to sauropods. A data set comprising 292 characters for seven outgroups and 27 ingroup sauropodomorph taxa is presented and analysed. The most parsimonious trees suggest that Efraasia, Mussaurus, Thecodontosaurus and Saturnalia are increasingly more distant sister-taxa to the remaining sauropodomorphs. The latter are divided into two monophyletic sister-groups: a plateosaurian clade containing Plateosaurus, Lufengosaurus, Massospondylus, Coloradisaurus and others, and a sauropod clade, which includes melanorosaurs (near its base), Antetonitrus, Chinshakiangosaurus, Vulcanodon, Barapasaurus and eusauropods. Bootstrap values and constrained analyses with Templeton's tests indicate that support for many of the proposed relationships is relatively weak. This results from the inclusion of poorly known taxa, such as Blikanasaurus, and from considerable levels of character conflict. Character mapping indicates several apomorphic features that support the monophyly of a plateosaurian clade or subgroups within it. In addition, it appears that approximately 20 apomorphies are acquired early in basal sauropodomorph evolution, but are reversed to the plesiomorphic state in basal sauropods and eusauropods. Aside from their impact on phylogenetic uncertainty, these reversals may reflect important aspects of early sauropod evolution that relate to shifts in the ecological niches occupied by these taxa.

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Barrett, P.M., and Upchurch, P. 2007. The evolution of feeding mechanisms in early sauropodomorph dinosaurs; pp. 91-112 in Barrett, P.M. and Batten, D.J. (eds.), Evolution and Palaeobiology of Early Sauropodomorph Dinosaurs. Special Papers in Palaeontology 77. Palaeontological Association, London.

ABSTRACT: Sauropodomorph dinosaurs were the dominant terrestrial herbivores of the Late Triassic to Late Jurassic, but the early evolution of herbivory is poorly documented in this clade. In particular, the transition from the relatively simple feeding mechanisms of basal sauropodomorphs and prosauropods to the more complex feeding apparatus of sauropods has received little attention, owing largely to the paucity of basal sauropod material. Discoveries of Late Triassic and Early Jurassic sauropods and reinterpretation of sauropodomorph phylogeny have alleviated this problem, revealing new information on the sequence of character acquisitions that occurred during the origin of sauropods. The evolution of sauropod herbivory was intimately associated with concurrent trends towards increased body size and quadrupedal locomotion. Recognition of Jingshanosaurus and Melanorosaurus as basal sauropods closes the morphological gap that existed between more advanced sauropods, such as Vulcanodon, and prosauropods.

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Bonnan, M.F., and Yates, A.M. 2007. A new description of the forelimb of the basal sauropodomorph Melanorosaurus: implications for the evolution of pronation, manus shape and quadrupedalism in sauropod dinosaurs; pp. 157-168 in Barrett, P.M. and Batten, D.J. (eds.), Evolution and Palaeobiology of Early Sauropodomorph Dinosaurs. Special Papers in Palaeontology 77. Palaeontological Association, London.

ABSTRACT: The evolution of a quadrupedal limb posture is characteristic of the earliest sauropod dinosaurs and involved secondarily modifying a non-supporting forelimb into a pronated support column with a semicircular metacarpus. Melanorosaurus readi is a basal sauropodomorph phylogenetically close to the earliest sauropods, and the morphology of its forelimb sheds additional light on the origins of the unique manus shape of sauropods and the initial stages of manus pronation. We describe the osteology of a complete forelimb of Melanorosaurus (NM QR3314), as well as partial referred specimens (SAM-PK-K3449, SAM-PKK3532), and show that the forelimb elements of this taxon comprise a mosaic of basal sauropodomorph and basal sauropod characteristics. The humerus retains the plesiomorphic morphology of basal sauropodomorphs. However, like sauropods, the forearm of Melanorosaurus clearly shows the development of a proximal craniolateral process on its ulna and a shift in the position of the radius to a more cranial orientation relative to the ulna. The manus of Melanorosaurus was not a semicircular colonnade as in sauropods: instead its metacarpals were arranged closer to the orientation more typical of theropods and basal sauropodomorphs. A recurved, medially divergent pollex claw and straighter but blunter claws on digits II and III were present. We suggest that the characteristic U-shaped manus of eusauropods and neosauropods may have resulted from mosaic evolution. The forelimb morphology of Melanorosaurus suggests that pronation of the manus occurred early in basal sauropods through a change in antebrachial morphology, but that changes to the morphology of the manus followed later in eusauropods, perhaps related to further manus pronation and improved stress absorption in the metacarpus. Thus, we conclude that changes to antebrachial morphology and manus morphology were not temporally linked in sauropods and constitute separate phylogenetic events.

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Wedel, M. 2007. What pneumaticity tells us about 'prosauropods', and vice versa; pp. 207-222 in Barrett, P.M. and Batten, D.J. (eds.), Evolution and Palaeobiology of Early Sauropodomorph Dinosaurs. Special Papers in Palaeontology 77. Palaeontological Association, London.

ABSTRACT: Pneumatic (air-filled) bones are an important feature of the postcranial skeleton in pterosaurs, theropods and sauropods. However, there is no unambiguous evidence for postcranial pneumaticity in basal sauropodomorphs and even the ambiguous evidence is scant. Patterns of skeletal pneumatization in early sauropods and theropods suggest that basal saurischians had cervical air sacs like those of birds. Furthermore, patterns of pneumaticity in most pterosaurs, theropods and sauropods are diagnostic for abdominal air sacs. The air sacs necessary for flow-through lung ventilation like that of birds may have evolved once (at the base of Ornithodira), twice (independently in pterosaurs and saurischians) or three times (independently in pterosaurs, theropods and sauropods). Skeletal pneumaticity appears to be more evolutionarily malleable than the air sacs and diverticula that produce it. The evolution of air sacs probably pre-dated the appearance of skeletal pneumaticity in ornithodirans.

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Pol, D., and Powell, J.E. 2007. New information on Lessemsaurus sauropoides (Dinosauria: Sauropodomorpha) from the Upper Triassic of Argentina; pp. 223-243 in Barrett, P.M. and Batten, D.J. (eds.), Evolution and Palaeobiology of Early Sauropodomorph Dinosaurs. Special Papers in Palaeontology 77. Palaeontological Association, London.

ABSTRACT: Postcranial remains of Lessemsaurus sauropoides are described herein, including elements of the vertebral column, pectoral girdle, forelimb, pelvis and hindlimb. These remains were closely associated with the cervicodorsal neural arches previously described from this taxon. This assemblage of bones shows numerous derived characters, including some derived similarities exclusively shared with Antetonitrus ingenipes from the Upper Triassic of South Africa. Additionally, this material reveals an unusual combination of plesiomorphic character states present in many non-eusauropod sauropodomorphs together with derived characters that suggest affinities with eusauropods and related taxa.

d_m

stary nowy dinozaur ;)

Post autor: d_m »

Mart?­nez, R.D., and Novas, F.E. 2006. Aniksosaurus darwini gen. et sp. nov.,
a new coelurosaurian theropod from the early Late Cretaceous of central
Patagonia, Argentina. Revista del Museo Argentino de Ciencias Naturales,
n.s. 8(2):243-259.

Abstract. The theropod dinosaur Aniksosaurus darwini gen. et sp. nov. has
been recovered from the Upper Cretaceous, Bajo Barreal Formation, of Central
Patagonia. Aniksosaurus darwini gen. et sp. nov. was a small tetanurine,
approximately 2 meters long. Aniksosaurus exhibits several unique traits
(e.g., cranial cervical vertebrae with dorsoventrally deep neural arches,
provided with a pair of cavities at their cranial surfaces; neural canal
wide; cranial caudals with ventral sagittal keel, and transverse processes
triangular-shaped in dorsal view; manual ungual phalanges robust; ilium with
extremely expanded brevis shelf; femur with deep notch for M.
Iliotrochantericus; metatarsal and digit IV of pes transversely narrow).
Available postcranial bones of Aniksosaurus exhibit derived features of
Coelurosauria (e.g., ilium with well developed cuppedicus fossa; femur with
anterior trochanter proximally projected, almost reaching the level of the
articular head; greater trochanter craniocaudally expanded; femoral head
rectangular-shaped in cranial aspect; and fibular shaft craniocaudally
narrow), as well as characteristics suggesting that the new Patagonian taxon
is more derived than some basal coelurosaurians such as compsognathids,
Ornitholestes, and coelurids. Comparisons with maniraptoriforms (a clade
including Ornithomimosauria, Tyrannosauridae, Oviraptorosauria,
Alvarezsauridae and Paraves) support that Aniksosaurus is less derived than
these theropods.
Chyba trzeba bÄ?dzie zrewidowaÄ? statystykÄ? za 2006 rok :P Nazwa figurowa??a ju?? na spisach od dawna (od roku 1995; zob. te??: ED: aniksozaur), ale sta??a siÄ? aktywna dopiero wraz z ukazaniem siÄ? formalnego opisu.

EDIT 01.04.2007: Artyku?? w PDFie: http://www.4shared.com/file/13266793/6d ... as_1_.html

EDIT 01.04.2007: Opis do ED:
http://www.dinozaury.com/forum/viewtopic.php?p=17866

d_m

bia??ko dinozaura

Post autor: d_m »

W ko??ci B. rexa odnaleziono czÄ?steczki bia??ka. WiÄ?cej:
http://www.montana.edu/cpa/news/nwview.php?article=4777

EDIT: Pisze te?? o tym GW: http://www.gazetawyborcza.pl/1,75476,4057941.html

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dilong
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Post autor: dilong »

Te?? mi nowina. Chyba ju?? to by??o, bo pamiÄ?tam ??e w "Teleexpresie" m??wili o jakim?? naukowcu, kt??ry dokona?? tego samego. Czyli, to mo??e ??wiadczyÄ?, ??e dinozaury, szczeg??lnie teropody mog??y mieÄ? metabolizm jak u ptakow, czyli te?? by??y sta??ocieplne.
Geologia UW

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Sebastian
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Lokalizacja: Harlow, Essex, UK

Post autor: Sebastian »

Jest tyle niepewnym takson??w (w kontek??cie klasyfikacji), ??e nie wiadomo tak naprawdÄ?, kt??ry z nich jest najtarszy. Za najstarsze dinozaury uwa??a siÄ? herrerazaury, jak wymieni??e??, np. Eoraptor. Jednak starsze od niego sÄ? takie taksony jak np. Eucoelophysis, Saltopus (wÄ?tpliwe czy by?? dinozaurem), Technosaurus, Sacisaurus itd., itp. ......

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P.S.- Poprawnie powinno byÄ? m??wi

d_m

Post autor: d_m »

Chyba Ci siÄ? pomyli??o z odkryciami innych dinozaurzych tkanek miÄ?kkich :wink:

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