Rajeev Patnaik

Rajeev Patnaik
Panjab University · Department of Geology

Ph.D

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162
Publications
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Publications

Publications (162)
Article
The Miocene ape (Sivapithecus) locality of Tapar in Kutch (Gujarat, India) has yielded a diverse rodent assemblage that includes: a new murine Progonomys prasadi sp. nov., a new gerbilline Myocricetodon gujaratensis sp. nov., a new rhizomyne Kanisamys kutchensis sp. nov. and a new sciurine Tamias gilaharee sp. nov., beside additional remains of Pro...
Article
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The Kargil Formation in the region of Ladakh (northern India) is known for its late Oligocene mammal fauna of both large mammals and rodents. New excavation in the area yielded a maxillary fragment of an insectivore with three premolars and two roots of a canine. The fossil record of the insectivores on the Indian subcontinent is as yet scanty. Bas...
Poster
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The Ladakh Molasse Group is a thick succession of continental clastic rocks consisting of shales, sandstones and conglomerates, which extend from Kargil in the west to Nyoma and Hanle in the east in the Ladakh region. The Ladakh Molasse Group is divided it into three formations; Kargil (170 m), Tarumsa (834 m) and Pashkyum (974 m) (Bhandari et al....
Article
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During the last two decades, work carried out in the Eocene lignite sequences of Rajasthan and Gujarat has thrown considerable light on the terrestrial biotas during the drift of India and radically changed concepts regarding how the Indian plate was populated, the issues of cosmopolitanism and endemism, and the nature of the mixed sal-dominated fo...
Article
The fossil record of treeshrews, hedgehogs, and other micromammals from the Lower Siwaliks of India is sparse. Here, we report on a new genus and species of fossil treeshrew, specimens of the hedgehog Galerix , and other micromammals from the middle Miocene (Lower Siwalik) deposits surrounding Ramnagar (Udhampur District, Jammu and Kashmir), at a f...
Article
We here report on the first madtsoiid snake from the late Oligocene of India (the molasse deposits of Ladakh Himalaya). Madtsoiidae is an extinct group of medium sized to gigantic snakes, members of which were mostly distributed across Gondwana.
Article
Full-text available
The Kashmir Valley in northern India preserves a fossiliferous Plio-Pleistocene sedimentary record extending in time almost 5 myr. These fluvio-lacustrine sediments are commonly called the Karewas, and represent an ancient lake system with drainages derived from the Greater Himalayas and Pir Panjal Ranges. Although fossils have been known from this...
Article
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The Listriodontinae were a common and widespread group of Suidae (pigs) that lived in an area extending from Portugal to China and to southern Africa. Here, we describe the new species Listriodon dukkar from Pasuda (Gujarat, India). It shares features with Li. pentapotamiae, evolved from it, and is the last representative of this lineage. The Listr...
Article
Rhythmic incremental growth of daily or longer duration is faithfully recorded in the tooth enamel of all the mammals including those of primates. Just a single well preserved fossil primate tooth can yield a variety of invaluable information, ranging from gestation period, age at weaning, age at death, prenatal and postnatal diet, ecology, water i...
Article
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The present 3D Dataset contains the 3D models analyzed in Mennecart B., Wazir W.A., Sehgal R.K., Patnaik R., Singh N.P., Kumar N, and Nanda A.C. 2021. New remains of Nalamaeryx (Tragulidae, Mammalia) from the Ladakh Himalaya and their phylogenetical and palaeoenvironmental implications. Historical Biology. https: //doi.org/10.1080/08912963.2021.201...
Article
Full-text available
Fossil snakes are extremely rare in the Indian Neogene records. We report the first record of isolated precloacal vertebrae of a “colubrine” snake from a late Miocene site, Tapar section in Kutch, Gujarat (India). The present specimens differ from the earlier finding of a colubrid from a younger deposit of Labli Member, Utterbaini Formation of Uppe...
Article
Nalameryx savagei is one of the rare mammals found in India during the Oligocene. Five dental remains composed the originally found material, described in 1990. The first phylogenetic hypothesis proposed Nalameryx to be closely related to the basal ruminant Lophiomerycidae. The description of new specimens from the type bed K/7b from the Kargil For...
Article
Full-text available
The Miocene beds of Kutch in India are well known for their mammalian assemblages including an extinct ape Sivapithecus. We here report new amphibian and snake fossils, which have been recovered from two stratigraphic levels: the older Palasava locality which is dated to the middle Miocene (~ 14 Ma), whereas the sediments of younger sites at Tappar...
Preprint
A new window to the fossil herpetofauna of India: amphibians and snakes from the Miocene localities of Kutch (Gujarat)
Conference Paper
Full-text available
The Neogene localities of Kutch in India are famous for its rich assemblages of fossils vertebrates and invertebrate including the well-known record of an extinct ape Sivapithecus. Although, a little is known about the fossil herpetofaunal assemblages except a few fossil snakes. During a recent field in the Neogene of Kutch area, we have recovered...
Article
Full-text available
The Miocene beds of Kutch in India are well known for their mammalian assemblages, including the extinct ape Sivapithecus, but far less is known about the fossil squamates from this area. Although India with its over 800 reptile species is recognized as one of the global biodiversity hotspots, knowledge of past diversity and paleobiogeography of sq...
Article
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Many plant families lack substantive fossil records, limiting our understanding of their origin and evolution. The abundance and preservation potential of pollen through geological time have helped to overcome such limitations and have provided reliable fossils for reconstructing biogeographical history and character evolution in many angiosperm fa...
Article
Full-text available
We report here a diverse assemblage of sharks and batoids representing the genera Carcharhinus, Rhizoprionodon, Galeocerdo, Sphyrna, Myliobatis, Aetobatus, Dasyatis, Pastinachus, Himantura and Pristis from Tapar and Jangadia the two late and early Miocene sites, respectively, of Kutch (Gujarat, India). The shark Rhizoprionodon and batoids, Dasyatis...
Article
Full-text available
Scanning Electron Microscopic studies of fossil teeth of Chondrichthyan fishes comprising of primitive shark Hybodontiformes (Lonchidiidae: Pristrisodus tikiensis), Xenacanthiformes (Xenacanthidae: Mooreodontus indicus and Mooreodontus jaini) were carried out from the Late Triassic Tiki Formation, Madhya Pradesh, India. Samples of neoselachian shar...
Chapter
In the light of new discoveries, previously known Siwalik murid, rhizomyid and ctenodactylid rodents are revised. Murines that are described and discussed here include Progonomys debruijni, Karnimata darwini and Parapodemus hariensis from the Late Miocene of Haritalyangar and Mus cf. M. pahari and Hadromys sp. from the Pliocene and Early Pleistocen...
Article
The fossil record of ‘lesser apes’ (i.e. hylobatids = gibbons and siamangs) is virtually non-existent before the latest Miocene of East Asia. However, molecular data strongly and consistently suggest that hylobatids should be present by approximately 20 Ma; thus, there are large temporal, geographical, and morphological gaps between early fossil ap...
Article
Full-text available
This study attempted to probe a geologically more stable IR stimulated luminescence signal (IRSL) that explored so far. IRSL, probes the proximal pairs and, pIRSL measurements at elevated temperatures consume more distant pairs. We surmised that the residual IRSL after pIR-IRSL should arise from most distant pairs and hence should be more stable. A...
Article
Full-text available
Deinotheriidae Bonaparte, 1845 is a family of browsing proboscideans that were widespread in the Old World during the Neogene. From Miocene deposits in the Indian subcontinent, deinotheres are known largely from dental remains. Both large and small species have been described from the region. Previously, only small deinothere species have been iden...
Conference Paper
Fossil snakes are extremely rare in the Indian Neogene record. We report isolated precloacal vertebrae of a “colubrine” snake from a late Miocene site, Tappar in Kutch, Gujarat (India). This finding represents the first record of a fossil colubrine snake from Tappar, Kutch (India). Earlier, Rage et al. (2001) reported colubrids from the upper Plioc...
Article
Several studies have established that African proboscideans shifted their feeding strategies (browsing vs. grazing) in response to climatic and ecological changes. However, similar studies on their Indian relatives are rare. In this regard, we analysed the stable carbon (d 13 C) and oxygen (d 18 O) isotope composition, hypsodonty indices (HI), and...
Article
Full-text available
The Neogene of Kutch, Gujarat, India is well known for its fossil vertebrate remains. However, almost nothing is known about fresh water fishes from these deposits. A fresh water teleost fish fauna from a late Miocene (~11-10 Ma) locality, Tappar is reported. The present study also emphasizes on the palaeoenvironmental implications of these remains...
Article
A Sivapithecus m3 from Ramnagar is described and the taxonomy of all Sivapithecus specimens from Ramnagar is reviewed.
Article
Full-text available
The earliest hippopotamid fossils from the Indian Subcontinent come from the Miocene of the Siwalik Group. South Asian hippopotamidae are represented by the genus Hexaprotodon, and remains of these hippos are commonly found in Neogene and Quaternary sites. Here we report on the first directly dated specimen of Hexaprotodon sp. from the Narmada Vall...
Conference Paper
Charophytes represent a group of land plant ancestors living in freshwater or brackish environments. Their calcified fructifications i.e., gyrogonites and utricles, generally fossilize. Fossil gyrogonites have been recovered in non-marine deposits worldwide from the Silurian to the present. Although there are many reports of charophytes from the Ne...
Conference Paper
Full-text available
The Tappar beds from the Kutch basin, in western India are known for their rich mammalian and reptilian fossil assemblages. This section is thought to be from the Late Miocene age and consists of sandstone, siltstone and mudstone with intermittent conglomerate beds. During a recent field survey (2017-2018) of the Late Miocene deposits exposed aroun...
Article
Full-text available
Bone accumulation by porcupines at archaeological sites is well known. However, in paleontological sites such a taphonomical occurrence is rather rare. We here report porcupine (Hystrix sp.) gnaw marks on an unidentified bone fragment, dated to ~2.6 Ma from the Upper Siwalik deposits exposed near Khetpurali (Haryana), India. The present gnaw marks...
Article
The eastern state of Odisha, India is well known for its rich microlithic assemblages; over 400 sites have been reported, including some with tools for heavy-duty tasks. However, due to the lack of associated vertebrate fossils from stratified horizons and absolute dates, their antiquity and associated environments are yet to be established. We rep...
Article
The Plio-Pleistocene Siwalik deposits around Chandigarh, well known for their great wealth of mammalian fossils, preserve a continuous record of calcareous paleosols ranging in age from ∼2.7 to ∼0.6 Ma. The carbon isotope composition (δ¹³C relative to Vienna Peedee belemnite [VPDB]) of 140 pedogenic carbonates from Ghaggar and Nadah sections and 13...
Poster
An M3 of a catarrhine primate was recently recovered from Lower Siwalik deposits (~14-11 Ma) at the site of Sunetar near Ramnagar, India. Preliminary studies have shown that this Hylobates agilis-size tooth is distinct from the M3s of other primates found in the area, including Sivapithecus and Sivaladapis, and broader morphological comparisons ind...
Article
Despite sporadic fieldwork for nearly a century, the Middle Miocene hominoid locality of Ramnagar (Jammu and Kashmir, India) is still not well understood in terms of its taphonomy and paleoecology. Between 2010–2015, we collected a large number of vertebrate, invertebrate and plant fossil remains from seven sites in the Ramnagar area: Bassi, Kulwan...
Chapter
Full-text available
This paper presents general descriptive and contextual information on newly discovered microlithic scatters in the Sehore and Hoshangabad districts in the central Narmada Basin, Madhya Pradesh. The discussed sites or site complexes include Pilikarar, Budni, Naganpur, Khusmeli Dam, Digamber and Chikli along the northern part of the basin (Vindhyan H...
Article
Full-text available
The natural activity of ²³⁸U, ²³²Th and ⁴⁰K present in soil, fertilizer and palaeosols besides animal fossils was determined using low background gamma ray spectrometry. The highest uranium activity level were found in animal fossils of geogenic origin compared to palaeosols, soils and fertilizers, a result of post-mortem uranium assimilation in th...
Article
Full-text available
We describe a fossil freshwater crab specimen from the Tatrot Formation, Siwalik Group, of Northern India. We assign this specimen on the basis of morphology of the anterolateral margin, which is comparable to the extant species Acanthopotamon martensi (Wood-Mason, 1875) in the Ganges valley. We re-interpret previously described claw fragments from...
Article
Full-text available
New fossils from the latest Pliocene portion of the Tatrot Formation exposed in the Siwalik Hills of northern India represent the first fossil record of a darter (Anhingidae) from India. The darter fossils possibly represent a new species, but the limited information on the fossil record of this group restricts their taxonomic allocation. The Plioc...
Article
In case of freshwater deposits that cannot be isotopically dated or that lack a continuous sequence for magnetostratigraphic study, rodent biochronology is an useful tool in making intra-regional biostratigraphic correlations and dating isolated Siwalik fossil localities within the Himalayan Foreland Basin. We here, report a new fossil locality exp...
Article
Over the past century, numerous vertebrate fossils collected near the town of Ramnagar, India, have proven to be important for understanding the evolution and biogeography of many mammalian groups. Primates from Ramnagar, though rare, include a number of hominoid specimens attributable to Sivapithecus, as well as a single published mandibular fragm...
Conference Paper
Full-text available
In 1922, on the advice of prominent geologist and local Superintendent Charles Middlemiss, Barnum Brown began systematic collection of vertebrate fossils from Lower Siwalik deposits surrounding the town of Ramnagar (Jammu and Kashmir), India. Brown immediately discovered a partial jaw belonging to a large hominoid ape and described it as a new spec...
Article
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Neogene Climate, Terrestrial Mammals and Flora of the Indian Subcontinent
Article
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Although the Late Miocene Baripada Beds are well known for their wealth of fossil vertebrates and invertebrates, very little is known about their palaeoclimatic condition of deposition. Here, we present X-Ray Diffraction (XRD) analysis ofnineteen samples collected from a 14 m thick Baripada Bed Section at Mukurmatia. We have used this XRD result to...
Article
A biostratigraphic evaluation of the Indian subcontinent Neogene–Quaternary mammal genera at 1 Ma intervals reveals a strong correlation between faunal turnovers (first and last appearances and immigrations), diversity and major tectonic and climate-induced sea level and vegetation changes at 23–22, 20–18, 17–16, 15–14, 11–10, 9–8, 3–2 and 1–0 Ma....
Article
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The well-known Late Cretaceous Lameta Ghat locality (Jabalpur, India) provides a window of opportunity to study a large stable, near shore sandy beach, which was widely used by sauropod dinosaurs as a hatchery. In this paper, we revisit the eggs and eggshell fragments previously assigned to lizards from this locality and reassign them to crocodylom...
Article
Full-text available
Abstract Fossils, palaeosols and associated sedimentary rock samples from well-dated Siwalik sediments have been measured for their uranium content by low background gamma ray spectrometry with a view to study the role of geo-genic mobilization in enhancing the levels of uranium in ground water bodies of Malwa region in Punjab state, North Western...
Article
This study attempted to probe a geologically more stable IR stimulated luminescence signal (IRSL) that explored so far. IRSL, probes the proximal pairs and, pIRSL measurements at elevated temperatures consume more distant pairs. We surmised that the residual IRSL after pIR-IRSL should arise from most distant pairs and hence should be more stable. A...
Article
a b s t r a c t Late Miocene climate change particularly monsoon intensification brought about by tectonic upheavals changed significantly the regional vegetation scenario of the Indian Subcontinent. Siwalik Middle Miocene closed forests gave way to Late Miocene open and seasonal forests, which in turn were gradually replaced by latest Miocene and...