Tetrapods from the Upper Cretaceous (Turonian–Maastrichtian) Bauru Group of Brazil: a reappraisal

Fossil remains from the upper part of the Pab Formation in eastern Balochistan, Pakistan, provide the first diagnostic remains of a Cretaceous crocodyliform from the Indian subcontinent, and provide important information for assessing its biogeographic history. Specimens collected to date include the well preserved rostrum of a new genus and species, Pabwehshi pakistanensis. The rostrum has a foreshortened anterior snout, with serrated teeth that interlock to form a zig-zag cutting edge. The anterolaterally directed external nares are bordered ventrally and laterally by a well-marked narial fossa. Comparisons with crocodyliforms of equivalent age indicate that Pabwehshi is a baurusuchid mesoeucrocodylian related to Baurusuchus from Brazil and Cynodontosuchus from Argentina. Pabwehshi is the first baurusuchid known outside South America. It provides further evidence of a Cretaceous biogeographc link between South America and Indo-Pakistan.

/pdf/new-crocodyliform-reptilia-mesoeucrocodylia-from-the-upper-nise08fxoh.pdf

New crocodyliform (Reptilia, Mesoeucrocodylia) from the Upper Cretaceous Pab Formation of Vitakri, Balochistan (Pakistan)

Paleobiotic assemblages from the Deccan infra- and intertrappean beds are reviewed in great detail. Three distinct paleoenvironments (fluvio-lacustrine/terrestrial, brackish water and marine) have been identified within the infra- and intertrappean biotic assemblages of peninsular India. Recently, marine incursions have been recorded in a few of the Deccan intertrappean beds exposed in central and south-eastern India. The intertrappean beds have yielded marine planktic foraminiferans and freshwater/brackish water ostracods. The affinities of the paleobiotas are commonly considered to show a mixed pattern resulting from the addition of Gondwanan and Laurasian elements to endemic Indian taxa. During the last four decades, various biogeographic models (southern and northern connections) have been proposed to explain the presence of anomalous biogeographic biota in the Late Cretaceous of India. Based on the recovered fauna and flora assemblages, the Cretaceous–Paleogene boundary has been marked and a Late Cre...

Paleobiota from the Deccan volcano-sedimentary sequences of India: paleoenvironments, age and paleobiogeographic implications

Ostracods, plant tissues, and other inclusions in coprolites from the Late Cretaceous Lameta Formation at Pisdura, India: Taphonomical and palaeoecological implications

The sedimentary sequences associated with the Deccan Flood Basalts, i.e., infratrappean and intertrappean deposits, are known to yield a diverse assemblage of fauna that includes foraminiferans, ostracods, molluscs, fishes, frogs, turtles, lizards, snakes, crocodiles, dinosaurs, and mammals. The existing literature debates the exact nature of origin, age, and duration of the Deccan volcanic activity; however, there is a general accord within the geosciences community that the Deccan Flood Basalts bestrode the Cretaceous–Palaeogene Boundary. Within the past few decades, the record of the biotic component (particularly faunal elements) reported from the Deccan‐volcano sedimentary sequences have grown both numerically and taxonomically. Constraining the age of the Deccan‐volcano sedimentary sequences has a direct bearing on the studies that discuss the origin, evolution of the biota in a palaeobiogeographic framework, and also in the context of changes in the palaeoenvironment and palaeoecology. Thus, it becomes important to reinforce the age, environment of the Deccan‐volcano sedimentary sequences, and the origin/affinity of the faunal elements recovered from within these sedimentary deposits. We here reappraise the biotic (with an emphasis on the fauna) evidence in a biostratigraphic, palaeoecologic, and palaeobiogeographic aspect.

Faunal elements from the Deccan volcano‐sedimentary sequences of India: A reappraisal of biostratigraphic, palaeoecologic, and palaeobiogeographic aspects

Gondwanan dinosaurs of India: affinities and palaeobiogeography

This paper highlights the Cretaceous theropod record in India along with its af­ finities, and palaeobiologic aspects including description of a new theropod eggshell from the Upper Cretaceous Lameta Formation of Gujarat, India. Recent discoveries and phyloge­ netic reassessment of various theropod families suggest the presence of the poorly known family Abelisauridae; recent reports confirm the presence of Majungasaurus crenatissimus (DEPRET, 1896), Indosuchus HUENE & MATLEY, 1933 possible Carnotaurus BONAPARTE, 1985 and ?Allosaurus MARSH, 1877. An updated list of various Cretaceous theropod genera in­ cludes abelisaurids (Indosuchus raptorius HUENE & MATLEY, 1932, Indosaurus matleyi HUENE & MATLEY, 1933, Majungasaurus crenatissimus (DEPRET, 1896) Carnotaurus sp., allo­ saurids (Compsosuchus solus HUENE, 1932, ?Allosaurus) and coelurosaurs (Jubbulpuria tenuis HUENE & MATLEY, 1933, Laevisuchus indicus HUENE & MATLEY, 1933). Other theropods, such as Ornithomimoides mobilis HUENE & MATLEY, 1933, O. (?)barasim/ensis HUENE & MAT­ LEY, 1933 and Dryptosauroidesgrandis HUENE, 1932 regarded as indeterminate, need further assessment for proper affiliation. In the ongoing discussion, we however, present signifi­ cant new data on the first ever report of dinosaur eggshell material referable to a new ooge­ nus and oospecies Ellipsoolithus khedaensis, (oofamily Elongatoolithidae) from near Rahioli, district Kheda, Gujarat. This material has been presently assigned to the Theropoda and can be easily differentiated from the other well known megaloolithid oospecies (broadly referable to Sauropoda due to associated titanosaurid bones; known from Madhya Pradesh, Gujarat, Maharashtra and Ariyalur in South India) on the basis of megascopic, microscopic and ultrastructural characteristics. Megascopically, the eggshell shape varies from elon­ gated ellipsoid, having an elongation ratio range of 1.5 to 1.7. The eggshell thickness is 1.2- 1.6 mm and the mammillary layer is 1/4-1/7 of the total thickness. At the microstructural level, an angusticanaliculate pore system is observed. As the present find constitutes the first record of elongatoolithid eggshells apart from well known Chinese and Mongolian lo­ calities, comments on possible sauropod-theropod palaeobiology are also discussed.

/pdf/status-and-palaeobiology-of-the-late-cretaceous-indian-v5o84fol1l.pdf

Status and palaeobiology of the late cretaceous indian theropods with description of a new theropod eggshell oogenus and oospecies, ellipsoolithus khedaensis, from the lameta formation, district kheda, gujara t, western india

Macroevolutionary processes, that operate at larger than gene-level evolution, seeks to explain evolutionary processes and patterns of higher taxonomic categories and their phylogenesis. Species multiplication and their radiations, involving several examples of evolutionary novelties are being focused through refinement of DNA sequencing, which are suggestive of dating divergence events. Trends towards linking genetic shifts through space and time are increasingly being associated with paleontology, tectonics and climatic patterns. The fossil records are now better supplemented through information on rifting and colliding landmasses, which help explaining the biogeography and biodiversity changes. The Indian raft exemplifies admixtures of the Cretaceous endemic and Laurasiatic affinities; while the collision of India-Asia landmasses is initiated by thermal maxima phases of Late Palaeocene-Early Eocene; and mammalian diversification happened in the northern Indian landmass in response to progressive land emergence and Tethyan sea withdrawals. Strong trends in fluctuations in biodiversity of mammals in response to orbital forcing and climatic shifts are observed during periods of glaciation and preglaciation during Miocene and later intervals.

Macroevolution in relation to the drift models of the Indian plate

Popular Tasks used by Researchers

How can I help with your research?

Get more enhanced response by uploading the PDFs you want me to reference.

No relevant PDFs in your library

SciSpace is the AI research assistant for academics. Run systematic literature reviews on 280M+ papers, and write papers with cited sources. Trusted by 1M+ students, PhDs & researchers.

SciSpace | AI for Research

We encountered an error while loading the panel. Please try refreshing the page.

Something went wrong

Analyze PDFs

Code & Manuscripts

Funding & Grants

Literature & Patents

Medical & Clinical Data

Systematic Review

Visualize & Present

Web & Data

Build a Google Scholar-like website for your research.

Build a website

Create charts and images for your research

Create a Chart

Write a paper for submission to a journal

Draft a manuscript

Patent Search

Design eye-catching scientific posters in minutes.

Scientific Poster Generation

Systematic Literature Review

Anyone with the link can view this chat. You can switch it back to private anytime.

One task is running at the moment. Your messages will be shown right after.

Drag and drop or click here to browse

Loved by <highlight>1 million+</highlight> researchers

Extract a list of specific topics and their sources from unstructured text

Topics

Compare and analyze relevant papers that matches with your search

Papers

Get insights from PDFs and bookmarked papers from your library

My library

Recent searches

Try searching for:

Catch AI-generated content in scholarly and non-scholarly content

{ai} Detector

Ai Writer

Get PDF Summaries, highlighted text explanations 

Chat with PDF

Effortlessly create in-text citations and bibliographies in APA and 2,500 other formats

Citation generator

Get explanations, summaries, and answers on academic papers

Ease up your research workflow with {scispace}'s cohort of exciting AI tools

Elevate your academic writing skills and convey your ideas the way you want

Paraphraser

Explore our range of reading and writing tools

Your file is being prepared and should be ready in a few minutes. If it's a large file, it might take a bit longer. You can close this window, and we'll email you the file when it's done.

You have reached a maximum limit of <strong>{limit}</strong> columns in the table. Remove at least <strong>1</strong> column to add or create another one.

Raminder S. Loyal

Author Tools

Chat about Author

Papers

Gondwanan dinosaurs of India: affinities and palaeobiogeography

Status and palaeobiology of the late cretaceous indian theropods with description of a new theropod eggshell oogenus and oospecies, ellipsoolithus khedaensis, from the lameta formation, district kheda, gujara t, western india

Macroevolution in relation to the drift models of the Indian plate