[Paleontology • 2019] Thanos simonattoi • A New Abelisauridae (Dinosauria: Theropoda) from São José do Rio Preto Formation, Upper Cretaceous of Brazil and Comments on the Bauru Group Fauna ---ScRaBBlE

Thanos simonattoi 

Delcourt & Iori, 2019

 DOI: 10.1080/08912963.2018.1546700 
Art by Deverson da Silva (Pepi).

ABSTRACT

Abelisaurid theropods are well-know from the Cretaceous of several parts of the Southern Hemisphere, including South America, Madagascar, and Africa, but also in India and Europe. Abelisaurids are high-diverse among other theropods with several cervicocephalic specializations reaching medium/large sizes. In the present contribution, we describe a new abelisaurid (Thanos simonattoi, gen. et sp. nov.) from the São José do Rio Preto Formation, Bauru Group, Brazil (Upper Cretaceous). Thanos differs from other theropods by having a well-developed keel becoming wider and deeper posteriorly on the ventral surface; two lateral small foramina separated by a relative wide wall on each lateral surface of the centrum, and well-developed and deep prezygapophyseal spinodiapophyseal fossae. The closed sutures between the axis and odontoid suggest that Thanos had reached a subadult/adult stage before death. Thanos is phylogenetically related to Brachyrostra abelisaurid. The keel on the ventral axial centrum in abelisauroids is here interpreted as a homoplastic condition that became more pronounced towards the phylogeny. The presence of well-developed keel in Thanos suggests that this taxon could be more derived than other abelisaurids. Finally, even though abelisaurids could reach large sizes, Thanos shared the environment with a larger theropod that was probably close to Megaraptora.

KEYWORDS: Theropods, Brachyrostra, vertebra, axis, Thanos simonattoi

Figure 4. An interpretative picture of the paleoenvironment of São José do Rio Preto Formation (Santonian, Upper Cretaceous). The picture shows two specimens of Thanos simonattoi (on the right side) and titanosaur sauropods (on the mid and left sides).

 Art by Deverson da Silva (Pepi).

Systematic palaeontology 

Dinosauria Owen, 1842 

Theropoda Marsh, 1881 

Ceratosauria Marsh 1884 

Abelisauroidea Bonaparte and Novas, 1985 

Abelisauridae Bonaparte and Novas, 1985 

Brachyrostra Canale et al. 2009 

Thanos simonattoi gen. et sp. nov. 

Etymology: Genus name from the Greek thánato, meaning death and from the Marvel’s character Thanos, the Conquer, created by Jim Starlin. Species name in honor of Sérgio Simonatto, the discoverer of the specimen.

.....

Conclusion:

In the present contribution, we have described a new abelisaurid from the São José do Rio Preto Formation, Upper Cretaceous of Brazil. Thanos simonattoi is distinguished from other abelisaurids by having a combination of features: a well-developed keel on the ventral surface becoming wider and deeper posteriorly; two lateral small foramina separated by a relative wide wall and two welldeveloped and deep prezygapophyseal spinodiapophyseal fossae. The keel on the ventral axial centrum of Thanos is interpreted as a homoplastic condition that became more pronounced towards the phylogeny, suggesting that this taxon could be more derived than other abelisaurids. The presence of a medium-sized abelisaurid in the São José do Rio Preto Formation increases the record of theropods, suggesting a complex carnivorous fauna during the Upper Cretaceous of Bauru Group. More findings are needed to better understand the morphology and the internal relationships of Thanos simonattoi.

Rafael Delcourt and Fabiano Vidoi Iori. 2019. A New Abelisauridae (Dinosauria: Theropoda) from São José do Rio Preto Formation, Upper Cretaceous of Brazil and Comments on the Bauru Group Fauna. Historical Biology: An International Journal of Paleobiology. DOI: 10.1080/08912963.2018.1546700 

Méndez AH, Novas FE and Iori FV. 2014. New Record of Abelisauroid Theropods from the Bauru Group (Upper Cretaceous), São Paulo State, Brazil. Revista Brasileira de Paleontologia. 17(1). Citeseer: 23–32.

 Researchgate.net/publication/265381596_New_records_of_abelisauroid_theropods_from_the_Bauru_Basin_Upper_Cretaceous_Sao_Paulo_State_Brazil

 waxing-paleontological.blogspot.com/2018/11/thanos-deserves-better.html 

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روابط التحميل والمشاهدة، الروابط المباشرة للتحميل

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شاهد هذا الفيديو القصير لطريقة التحميل البسيطة

منتدى مدونات بلوجر جاهزة بآلاف المواضيع والمشاركات

كيف تحصل على مدونة جاهزة بآلاف المواضيع والمشاركات من هنا

شاهد قناة منتدى مدونات بلوجر جاهزة بألاف المواضيع والمشاركات على اليوتيوب لمزيد من الشرح من هنا

رابط مدونة منتدى مدونات بلوجر جاهزة بآلاف المواضيع والمشاركات في أي وقت حــــتى لو تم حذفها من هنا
شاهد صفحة منتدى مدونات بلوجر جاهزة بألاف المواضيع والمشاركات على الفيس بوك لمزيد من الشرح من هنا

تعرف على ترتيب مواضيع منتدى مدونات بلوجر جاهزة بآلاف المواضيع والمشاركات (حتى لا تختلط عليك الامور) من هنا

ملاحظة هامة: كل عمليات تنزيل، رفع، وتعديل المواضيع الجاهزة تتم بطريقة آلية، ونعتذر عن اي موضوع مخالف او مخل بالحياء مرفوع بالمدونات الجاهزة بآلاف المواضيع والمشاركات، ولكم ان تقوموا بحذف هذه المواضيع والمشاركات والطريقة بسيطة وسهلة. ــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــسلامـ.

[Paleontology • 2018] Endocerids: Suspension Feeding Nautiloids? ---ScRaBBlE

 endocerids with their filtering apparatus

in Mironenko, 2018. 

DOI: 10.1080/08912963.2018.1491565 

Reconstruction by Andrey Atuchin

ABSTRACT

For a long time all extinct cephalopods of the subclass Nautiloidea were considered as ecological analogues of the Recent Nautilus. Recently this view has been rejected: it is now known that among the nautiloids there were not only demersal predators but also epipelagic animals whose life-style and reproduction differed from those of the Nautilus. However, the habits of some nautiloid orders is still poorly understood. One of the most enigmatic cephalopods is the Early Paleozoic nautiloid order Endocerida. Endocerids differ from other nautiloids: they reached gigantic sizes (up to 9 meters), had a wide siphuncle tube and were widespread and numerous during the Ordovician. Since they were an important component of many Ordovician ecosystems, without the understanding of their habits and feeding strategies a correct reconstruction of these ecosystems is impossible. Until now, endocerids have been considered as dominant apex predators, however, this assumption is based on an analogy with the Nautilus mode of life, while the features of the structure of endocerid shells do not confirm this idea and furthermore contradict it. In this article, a new hypothesis is proposed and debated: according to it, the endocerids were planktotrophic cephalopods and the largest of them were giant suspension feeders.

KEYWORDS: Ordovician, Nautiloidea, Endocerida, suspension-feeding, plankton

Figure 2. Hypothetical reconstruction of endocerids with their filtering apparatus. A thin and expansible membrane stretched between their arms is based on the membrane in modern cirrate octopuses and Vampiroteutis.

Drawn by Andrey Atuchin, based on the sketch of the author.

Aleksandr A. Mironenko. 2018. Endocerids: Suspension Feeding Nautiloids? Historical Biology: An International Journal of Paleobiology.   DOI: 10.1080/08912963.2018.1491565

Missed It? | Full list of the 85 paleontological papers published this week go.shr.lc/2lKrKKr via @Paleowire

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روابط التحميل والمشاهدة، الروابط المباشرة للتحميل

من هنا

او

من هنا

شاهد هذا الفيديو القصير لطريقة التحميل البسيطة

منتدى مدونات بلوجر جاهزة بآلاف المواضيع والمشاركات

كيف تحصل على مدونة جاهزة بآلاف المواضيع والمشاركات من هنا

شاهد قناة منتدى مدونات بلوجر جاهزة بألاف المواضيع والمشاركات على اليوتيوب لمزيد من الشرح من هنا

رابط مدونة منتدى مدونات بلوجر جاهزة بآلاف المواضيع والمشاركات في أي وقت حــــتى لو تم حذفها من هنا
شاهد صفحة منتدى مدونات بلوجر جاهزة بألاف المواضيع والمشاركات على الفيس بوك لمزيد من الشرح من هنا

تعرف على ترتيب مواضيع منتدى مدونات بلوجر جاهزة بآلاف المواضيع والمشاركات (حتى لا تختلط عليك الامور) من هنا

ملاحظة هامة: كل عمليات تنزيل، رفع، وتعديل المواضيع الجاهزة تتم بطريقة آلية، ونعتذر عن اي موضوع مخالف او مخل بالحياء مرفوع بالمدونات الجاهزة بآلاف المواضيع والمشاركات، ولكم ان تقوموا بحذف هذه المواضيع والمشاركات والطريقة بسيطة وسهلة. ــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــسلامـ.

[Paleontology • 2018] Reanalysis of the Phylogenetic Status of Nipponosaurus sachalinensis (Ornithopoda: Dinosauria) from the Late Cretaceous of Southern Sakhalin ---ScRaBBlE

Nipponosaurus sachalinensis Nagao, 1936

in Takasaki, Chiba, Kobayashi, et al., 2018

ニッポノサウルス || DOI: 10.1080/08912963.2017.1317766 

 blogs.yahoo.co.jp  twitter.com/NHK_n_sp

Abstract

Nipponosaurus sachalinensis is the only definitive lambeosaurine hadrosaurid from Sakhalin Island of Russia. Previous studies suggested it was a member of Lambeosaurini (derived lambeosaurines). However, its phylogenetic status within Lambeosaurini remains controversial. In addition, some studies argued the juvenile ontogenetic stage of the holotype and regarded Nipponosaurus as an invalid taxon. In order to solve these problems, its definite growth stage is determined through histological studies. Absence of a line of arrested growth, presence of osteons with large vascular spaces, and presence of primary bone remnants even in the highly modified regions of the femur confirm that the holotype was a juvenile. More than a hundred of the 350 characters used to determine the phylogenetic position of Nipponosaurus are ontogenetically variable characters based on the different ontogenetic stages of Hypacrosaurus stebingeri. Our phylogenetic analysis reveals that Nipponosaurus is a basal lambeosaurine hadrosaurid, much further down in the tree than previously suggested, and shows a polytomy with Blasisaurus and Arenyisaurus. This study also indicates that Nipponosaurus is a valid taxon because it possesses unique characters within the Lambeosaurinae (presence of massive surangular anterodorsal process, presence of lateral shelf of the dentary, and a relatively short ulna), which are independent of ontogeny.

Keywords: Dinosaur, Ornithopoda, Hadrosauridae, Nipponosaurus, ontogeny, histology

Cross section of a thighbone of Nipponosaurus (A) with an enlarged photo of the rectangular area (B). The latter shows the changing directions of the vascular canals.  

ニッポノサウルスの孤独 - GET AWAY TRIKE !
 blogs.yahoo.co.jp/rboz_05/35175912.html   

    

facebook.com/MuseumHokudai

Conclusions:

 Histological observations provide the first direct evidence that Nipponosaurus is an immature specimen. By comparing different ontogenetic stages of H. stebingeri and reviewing previous studies, up to 102 characters previously used in phylogenetic analyses are considered ontogenetically controlled within Hadrosauridae. Our phylogenetic analysis positions Nipponosaurus within a monophyletic clade of Arenysaurus and Blasisaurus, which has a sister clade relationship with the clade comprised of Parasaurolophini and Lambeosaurini. This newly recovered phylogenetic position supports a strong affinity of Asian and European lambeosaurids. The resulting relationships of this genus suggest that this taxon is valid, and represents one of the few hadrosaur specimens in Far East Asia.

Ryuji Takasaki, Kentaro Chiba, Yoshitsugu Kobayashi, Philip J. Currie and Anthony R. Fiorillo. 2018. Reanalysis of the Phylogenetic Status of Nipponosaurus sachalinensis (Ornithopoda: Dinosauria) from the Late Cretaceous of Southern Sakhalin. Historical Biology: An International Journal of Paleobiology.  5; 694-711.   DOI: 10.1080/08912963.2017.1317766

facebook.com/MuseumHokudai/posts/1569884383051928

 ニッポノサウルスの孤独 - GET AWAY TRIKE ! - Yahoo!ブログ  blogs.yahoo.co.jp/rboz_05/35175912.html
#ブログ #その他自然科学 #鳥脚類

https://twitter.com/GET_AWAY_TRIKE/status/753061281825820672

 twitter.com/NHK_n_sp/status/860992715202240513

【動画】NスペPlus 7200万年前の巨大恐竜“むかわ竜”がよみがえる！ - 世界でも珍しい全身骨格化石を手がかりに、“むかわ竜”の姿をよみがえらせました。　#むかわ竜 #恐竜 #化石  nhk.or.jp/special/plus/videos/20170522/index.html

Unraveling the mysteries of Nipponosaurus phys.org/news/2017-06-unraveling-mysteries-nipponosaurus.html via @physorg_com

Duck-Billed Dinosaur Is Japan’s Largest Complete Fossil asianscientist.com/2017/06/in-the-lab/largest-dinosaur-skeleton-nipponosaurus

    

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روابط التحميل والمشاهدة، الروابط المباشرة للتحميل

من هنا

او

من هنا

شاهد هذا الفيديو القصير لطريقة التحميل البسيطة

منتدى مدونات بلوجر جاهزة بآلاف المواضيع والمشاركات

كيف تحصل على مدونة جاهزة بآلاف المواضيع والمشاركات من هنا

شاهد قناة منتدى مدونات بلوجر جاهزة بألاف المواضيع والمشاركات على اليوتيوب لمزيد من الشرح من هنا

رابط مدونة منتدى مدونات بلوجر جاهزة بآلاف المواضيع والمشاركات في أي وقت حــــتى لو تم حذفها من هنا
شاهد صفحة منتدى مدونات بلوجر جاهزة بألاف المواضيع والمشاركات على الفيس بوك لمزيد من الشرح من هنا

تعرف على ترتيب مواضيع منتدى مدونات بلوجر جاهزة بآلاف المواضيع والمشاركات (حتى لا تختلط عليك الامور) من هنا

ملاحظة هامة: كل عمليات تنزيل، رفع، وتعديل المواضيع الجاهزة تتم بطريقة آلية، ونعتذر عن اي موضوع مخالف او مخل بالحياء مرفوع بالمدونات الجاهزة بآلاف المواضيع والمشاركات، ولكم ان تقوموا بحذف هذه المواضيع والمشاركات والطريقة بسيطة وسهلة. ــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــسلامـ.