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[Ornithology • 2017] Myzomela irianawidodoae • A Colourful New Species of Myzomela Honeyeater from Rote Island in eastern Indonesia ---ScRaBBlE

Myzomela irianawidodoae Prawiradilaga, Baveja, Suparno, Ashari, Ng, Gwee, Verbelen & Rheindt, 2017  photo:   Philippe Verbelen  e-journ...

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Showing posts with label Nature Ecology & Evolution. Show all posts
Showing posts with label Nature Ecology & Evolution. Show all posts

Wednesday, March 20, 2019

[Fungi • 2019] Megaphylogeny Resolves Global Patterns of Mushroom (Agaricomycetes) Evolution ---ScRaBBlE


 Phylogenetic relationships and diversification across 5,284 mushroom-forming fungi. 
in Varga, Krizsán, Földi, et al., 2019. 

Mushroom-forming fungi (Agaricomycetes) have the greatest morphological diversity and complexity of any group of fungi. They have radiated into most niches and fulfil diverse roles in the ecosystem, including wood decomposers, pathogens or mycorrhizal mutualists. Despite the importance of mushroom-forming fungi, large-scale patterns of their evolutionary history are poorly known, in part due to the lack of a comprehensive and dated molecular phylogeny. Here, using multigene and genome-based data, we assemble a 5,284-species phylogenetic tree and infer ages and broad patterns of speciation/extinction and morphological innovation in mushroom-forming fungi. Agaricomycetes started a rapid class-wide radiation in the Jurassic, coinciding with the spread of (sub)tropical coniferous forests and a warming climate. A possible mass extinction, several clade-specific adaptive radiations and morphological diversification of fruiting bodies followed during the Cretaceous and the Paleogene, convergently giving rise to the classic toadstool morphology, with a cap, stalk and gills (pileate-stipitate morphology). This morphology is associated with increased rates of lineage diversification, suggesting it represents a key innovation in the evolution of mushroom-forming fungi. The increase in mushroom diversity started during the Mesozoic-Cenozoic radiation event, an era of humid climate when terrestrial communities dominated by gymnosperms and reptiles were also expanding.

Fig. 1: Phylogenetic relationships and diversification across 5,284 mushroom-forming fungi.
One of the 245 analysed maximum-likelihood trees was randomly chosen and visualized. Trees were inferred from nrLSU, rpb2, ef1-a sequences with a phylogenomic backbone constraint of deep nodes. Branches are coloured by net diversification (speciation minus extinction) rate inferred in Bayesian Analysis of Macroevolutionary Mixtures (BAMM). Warmer colours denote a higher rate of diversification. Significant shifts in diversification rate are shown by triangles at nodes. Only shifts present on >50% of ten trees, with a Bayesian posterior probability >0.5 and a posterior odds ratio >5 are shown. See Supplementary Data 6 for detailed discussion of shifts. Reconstructed probabilities of ancestral plant hosts for order-level clades are shown as pie charts partitioned by the inferred ancestral probability for gymnosperm (green) and angiosperm host (black). Pie charts are given for the most recent common ancestors of each order plus backbone nodes within the Agaricales—for small orders see Supplementary Data 3. Inner and outer bars around the tree denote extant substrate preference (black, angiosperm; green, gymnosperm; grey, generalist) and the placement of species used for inferring the 650-gene phylogenomic backbone phylogeny. Geological time scale is indicated with grey/white concentric rings.





Torda Varga, Krisztina Krizsán, Csenge Földi, Bálint Dima, Marisol Sánchez-García, Santiago Sánchez-Ramírez, Gergely J. Szöllősi, János G. Szarkándi, Viktor Papp, László Albert, William Andreopoulos, Claudio Angelini, Vladimír Antonín, Kerrie W. Barry, Neale L. Bougher, Peter Buchanan, Bart Buyck, Viktória Bense, Pam Catcheside, Mansi Chovatia, Jerry Cooper, Wolfgang Dämon, Dennis Desjardin, Péter Finy, József Geml, Sajeet Haridas, Karen Hughes, Alfredo Justo, Dariusz Karasiński, Ivona Kautmanova, Brigitta Kiss, Sándor Kocsubé, Heikki Kotiranta, Kurt M. LaButti, Bernardo E. Lechner, Kare Liimatainen, Anna Lipzen, Zoltán Lukács, Sirma Mihaltcheva, Louis N. Morgado, Tuula Niskanen, Machiel E. Noordeloos, Robin A. Ohm, Beatriz Ortiz-Santana, Clark Ovrebo, Nikolett Rácz, Robert Riley, Anton Savchenko, Anton Shiryaev, Karl Soop, Viacheslav Spirin, Csilla Szebenyi, Michal Tomšovský, Rodham E. Tulloss, Jessie Uehling, Igor V. Grigoriev, Csaba Vágvölgyi, Tamás Papp, Francis M. Martin, Otto Miettinen, David S. Hibbett and László G. Nagy. 2019. Megaphylogeny Resolves Global Patterns of Mushroom Evolution. Nature Ecology & Evolution.  DOI: 10.1038/s41559-019-0834-1   


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روابط التحميل والمشاهدة، الروابط المباشرة للتحميل
او
شاهد هذا الفيديو القصير لطريقة التحميل البسيطة


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] Ingentia prima • An Early Trend Towards Gigantism in Triassic Sauropodomorph Dinosaurs ---ScRaBBlE


Ingentia prima
 Apaldetti, Martínez, Cerda, Pol & Alcober, 2018

Illustration: Jorge A. Gonzalez   twitter.com/PolDiego

Abstract 
Dinosaurs dominated the terrestrial ecosystems for more than 140 Myr during the Mesozoic era, and among them were sauropodomorphs, the largest land animals recorded in the history of life. Early sauropodomorphs were small bipeds, and it was long believed that acquisition of giant body size in this clade (over 10 tonnes) occurred during the Jurassic and was linked to numerous skeletal modifications present in Eusauropoda. Although the origin of gigantism in sauropodomorphs was a pivotal stage in the history of dinosaurs, an incomplete fossil record obscures details of this crucial evolutionary change. Here, we describe a new sauropodomorph from the Late Triassic of Argentina nested within a clade of other non-eusauropods from southwest Pangaea. Members of this clade attained large body size while maintaining a plesiomorphic cyclical growth pattern, displaying many features of the body plan of basal sauropodomorphs and lacking most anatomical traits previously regarded as adaptations to gigantism. This novel strategy highlights a highly accelerated growth rate, an improved avian-style respiratory system, and modifications of the vertebral epaxial musculature and hindlimbs as critical to the evolution of gigantism. This reveals that the first pulse towards gigantism in dinosaurs occurred over 30 Myr before the appearance of the first eusauropods.





Fig. 1: Skeletal anatomy of Ingentia prima gen. et sp. nov. from the Quebrada del Barro Formation, northwestern Argentina.
a–k, Holotype (PVSJ 1086). l–s, Referred material (PVSJ 1087). a–d, Mid-posterior cervical vertebrae, C5–C10 articulated series (a), close up of the pneumatic fossa with internal subfossae on the centrodiapophyseal fossa (cdf)26 of C8 (b) and C9 (c), and a complex of subfossae on the prcdf26 of C10 (d). e, Right partial scapula. f–i, Right forelimb: humerus (f), and the radius and ulna in proximal (g) and anterior (h) view, and distal articulation (i). j, Right manus in plantar view. k,l, Metacarpal I in proximal (k) and dorsal (l) view. m,n, Radius and ulnae with respective proximal ulna: right radius-ulna (m) and left radius-ulna (n) in posterior view. o, Left proximal end of fibula. p–r, Right partial pes: distal tarsal III–IV in proximal view (p), metatarsal I and II in dorsal view (q) and isolated phalanges (r). s, Four anterior caudal vertebrae and a distal one (bottom left).

 cen, centrum; dp, diapophysis; dt, distal tubercles of radius-ulna; f-sf, fossa-subfossae complex; ft, fibular tubercle; nc, neural canal; ol, olecranum; pm, posteromedial margin of the ulna; prz, prezygapophysis; rf, radial fossa; rib, rib. Scale bars: 10 cm in a and i–s; 2 cm in b–d; 20 cm in e–h; 120 cm for the skeleton. Red, holotype; yellow, referred specimen; orange, holotype and referred specimen.

Systematic palaeontology
Dinosauria Owen, 1842 
Saurischia Seeley, 1888 
Sauropodomorpha von Huene, 1932 

Lessemsauridae clade nov. 

Etymology. Related to Lessemsaurus sauropoides Bonaparte, 1999. 

Definition. The clade Lessemsauridae is defined here as L. sauropoides Bonaparte, 1999 and Antetonitrus ingenipes Yates and Kitching, 2003, and all the descendants from their most common ancestor. 

Ingentia prima gen. et sp. nov. 

Etymology. Ingentia’, huge (fem., Latin); ‘prima’, first (fem. Latin), referring to the large body size acquired during the early evolution of Dinosauria.

....



Cecilia Apaldetti, Ricardo N. Martínez, Ignacio A. Cerda, Diego Pol and Oscar Alcober. 2018. An Early Trend Towards Gigantism in Triassic Sauropodomorph Dinosaurs. Nature Ecology & Evolution.  DOI: 10.1038/s41559-018-0599-y  
 twitter.com/PolDiego/status/1016383540387352578

Huge new gentle giant dinosaur the size of a double decker bus discovered  metro.co.uk/2018/07/09/huge-gentle-giant-dinosaur-size-double-decker-bus-discovered-argentina-7695748 via @MetroUK

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روابط التحميل والمشاهدة، الروابط المباشرة للتحميل
او
شاهد هذا الفيديو القصير لطريقة التحميل البسيطة


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] Caelestiventus hanseni • extends the Desert-dwelling Pterosaur Record Back 65 Million Years ---ScRaBBlE


Caelestiventus hanseni 
Britt, Dalla Vecchia, Chure, Engelmann, Whiting & Scheetz, 2018

Illustration: Michael Skrepnick 

Abstract
Pterosaurs are the oldest known powered flying vertebrates. Originating in the Late Triassic, they thrived to the end of the Cretaceous. Triassic pterosaurs are extraordinarily rare and all but one specimen come from marine deposits in the Alps. A new comparatively large (wing span >150 cm) pterosaur, Caelestiventus hanseni gen. et sp. nov., from Upper Triassic desert deposits of western North America preserves delicate structural and pneumatic details not previously known in early pterosaurs, and allows a reinterpretation of crushed Triassic specimens. It shows that the earliest pterosaurs were geographically widely distributed and ecologically diverse, even living in harsh desert environments. It is the only record of desert-dwelling non-pterodactyloid pterosaurs and predates all known desert pterosaurs by more than 65 Myr. A phylogenetic analysis shows it is closely allied with Dimorphodon macronyx from the Early Jurassic of Britain.

Fig. 4: Reconstructions of Caelestiventus hanseni  and Dimorphodon macronyx.
a, Schematic silhouette of a dimorphodontid pterosaur in dorsal view. b, Preserved skull and mandible elements of Chanseni. The left maxillojugal is completed with the premaxillary process from the right maxilla. The right mandibular ramus is mirrored and is completed with the rostral end from the left ramus. Missing teeth have been reconstructed. The right nasal and frontoparietal are mirrored. c, Skull and mandible of the largest D. macronyx reconstructed (from Sangster, 2003) and modified incorporating our observations.

 Scale bars: 0.5 m in a and 10 mm in b and c. 
a, angular; aof, antorbital fenestra; d, dentary; fr, frontal; j, jugal; l, lacrimal; mx, maxilla; mdf, medially deflected flange; n, nasal; nvf, neurovascular foramen; pa, parital; pmx, premaxilla; sa, surangular; utf, upper temporal fenestra; vf, ventral flange.


Systematic palaeontology. 
Pterosauria Kaup, 1834 
Dimorphodontidae Seeley, 1870 

Caelestiventus hanseni gen. et sp. nov. 

Etymology. Caelestiventus hanseni comes from the Latin language: caelestis, ‘heavenly or divine’, and ventus, ‘wind’, referring to the volant nature of pterosaurs, and ‘hanseni’, honouring Robin L. Hansen, Bureau of Land Management (BLM) geologist, who facilitated work at the Saints & Sinners Quarry

....


Illustration: Michael Skrepnick 

Conclusion:
Caelestiventus hanseni is the first record of a desert-dwelling, non-pterodactyloid pterosaur, predating by >65Ma all known desert occurrences of pterosaurs. It shows that in the Late Triassic—early in their evolution and diversification—pterosaurs were widely distributed and lived in a broad range of habitats, including inland deserts far (>800 km) from the sea. Despite their morphological similarity, C. hanseni and D. macronyx lived in very different environments. Dimorphodon was an island dweller45 in a humid climate46 and was preserved in the marine Blue Lias (Hettangian–Sinemurian) of southern England (Sangster, 2003). C. hanseni indicates that dimorphodontids originated by the Late Triassic and survived the end-Triassic extinction event


Brooks B. Britt, Fabio M. Dalla Vecchia, Daniel J. Chure, George F. Engelmann, Michael F. Whiting and Rodney D. Scheetz. 2018.  Caelestiventus hanseni gen. et sp. nov. Extends the Desert-dwelling Pterosaur Record Back 65 Million Years. Nature Ecology & Evolution.  DOI: 10.1038/s41559-018-0627-y

Rare triassic pterosaur discovered by BYU paleontologists  news.byu.edu/node/11801 via @@BYU
Utah Pterosaur Was Desert-Dwelling Badass...Pelican? - Dead Things  blogs.discovermagazine.com/deadthings/2018/08/13/utah-pterosaur/


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روابط التحميل والمشاهدة، الروابط المباشرة للتحميل
او
شاهد هذا الفيديو القصير لطريقة التحميل البسيطة


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] Mansourasaurus shahinae • New Egyptian Sauropod reveals Late Cretaceous Dinosaur dispersal between Europe and Africa ---ScRaBBlE


Mansourasaurus shahinae 
Sallam, Gorscak, O’Connor, El-Dawoudi, El-Sayed, Saber, Kora, Sertich, Seiffert & Lamanna, 2018

  DOI: 10.1038/s41559-017-0455-5 

Abstract
Prominent hypotheses advanced over the past two decades have sought to characterize the Late Cretaceous continental vertebrate palaeobiogeography of Gondwanan landmasses, but have proved difficult to test because terrestrial vertebrates from the final ~30 million years of the Mesozoic are extremely rare and fragmentary on continental Africa (including the then-conjoined Arabian Peninsula but excluding the island of Madagascar). Here we describe a new titanosaurian sauropod dinosaur, Mansourasaurus shahinae gen. et sp. nov., from the Upper Cretaceous (Campanian) Quseir Formation of the Dakhla Oasis of the Egyptian Western Desert. Represented by an associated partial skeleton that includes cranial elements, Mansourasaurus is the most completely preserved land-living vertebrate from the post-Cenomanian Cretaceous (~94–66 million years ago) of the African continent. Phylogenetic analyses demonstrate that Mansourasaurus is nested within a clade of penecontemporaneous titanosaurians from southern Europe and eastern Asia, thereby providing the first unambiguous evidence for a post-Cenomanian Cretaceous continental vertebrate clade that inhabited both Africa and Europe. The close relationship of Mansourasaurus to coeval Eurasian titanosaurians indicates that terrestrial vertebrate dispersal occurred between Eurasia and northern Africa after the tectonic separation of the latter from South America ~100 million years ago. These findings counter hypotheses that dinosaur faunas of the African mainland were completely isolated during the post-Cenomanian Cretaceous.





Life reconstruction of Mansourasaurus shahinae on a coastline in what is now the Western Desert of Egypt approximately 80 million years ago.
Illustration: Andrew McAfee




Hesham M. Sallam, Eric Gorscak, Patrick M. O’Connor, Iman A. El-Dawoudi, Sanaa El-Sayed, Sara Saber, Mahmoud A. Kora, Joseph J. W. Sertich, Erik R. Seiffert and Matthew C. Lamanna. 2018.  New Egyptian Sauropod reveals Late Cretaceous Dinosaur dispersal between Europe and Africa. Nature Ecology & Evolution.  DOI: 10.1038/s41559-017-0455-5
منصوراصورس   facebook.com/HeshamSallam

اكتشاف الديناصور المصري «منصوراصورس» https://www.scientificamerican.com/arabic/articles/news/discovery-of-the-egyptian-dinosaur-mansourasaurus/ via @forscience_ar


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روابط التحميل والمشاهدة، الروابط المباشرة للتحميل
او
شاهد هذا الفيديو القصير لطريقة التحميل البسيطة


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.

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