First Miocene rodents from Kutch, western India

Bhandari, Ansuya; Bajpai, Sunil; Flynn, Lawrence J.; Tiwari, B. N.; Mandal, Nivedita

doi:10.1080/08912963.2020.1870970

Cited by 11 publications

(7 citation statements)

References 39 publications

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“…However, we note that the original assignment to this species was only tentative, and the measurements of the m2 and m3 in this small Kanisamys specimen are closer in size to K. indicus, particularly the sample described from the Manchar Formation in Sindh Province (Wessels and de Bruijn, 2001). Most recently, Bhandari et al (2021) suggested that this specimen is in fact K. indicus, which has a LAD of ca. 11.4 Ma.…”

Section: Journal Of Paleontology 96(6):1318-1335mentioning

confidence: 59%

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A new genus of treeshrew and other micromammals from the middle Miocene hominoid locality of Ramnagar, Udhampur District, Jammu and Kashmir, India

Sehgal

Singh²,

Gilbert³

et al. 2022

J. Paleontol.

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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 fossil locality known as Dehari. The treeshrew from Dehari (Sivatupaia ramnagarensis n. gen. n. sp.) currently represents the oldest record of fossil tupaiids in the Siwaliks, extending their time range by ca. 2.5–4.0 Myr in the region. Dietary analyses suggest that the new tupaiid was likely adapted for a less mechanically challenging or more frugivorous diet compared to other extant and fossil tupaiids. The occurrence of Galerix has only been recently documented from the Indian Siwaliks and the Dehari specimens help establish the likely presence of a relatively large Siwalik Galerix species in the Ramnagar region. In addition to the new treeshrew and hedgehogs, new specimens of the rodents Kanisamys indicus, Sayimys sivalensis, and Murinae indet. from Dehari help confirm that age estimates for the Ramnagar region are equivalent to the Chinji Formation in Pakistan, most likely corresponding to the middle to upper part of the Chinji Formation. UUID: http://zoobank.org/56fb160c-2df8-4cd3-be91-af4dc02d0979

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Section: Journal Of Paleontology 96(6):1318-1335mentioning

confidence: 59%

“…indicus , particularly the sample described from the Manchar Formation in Sindh Province (Wessels and de Bruijn, 2001). Most recently, Bhandari et al (2021) suggested that this specimen is in fact K . indicus , which has a LAD of ca.…”

Section: Discussionmentioning

confidence: 90%

A new genus of treeshrew and other micromammals from the middle Miocene hominoid locality of Ramnagar, Udhampur District, Jammu and Kashmir, India

Sehgal

Singh²,

Gilbert³

et al. 2022

J. Paleontol.

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“…1). This conglomerate bed is richly fossiliferous and yields a variety of vertebrates, including the hominoid Sivapithecus, fragmented teeth of proboscideans (Deinotherium, Gomphotherium), rhinos, giraffids, equids, bovid, suids, rodents, turtles, crocodiles, teleosts, sharks, and batoids (Bhandari et al, 2010(Bhandari et al, , 2015(Bhandari et al, , 2021Singh et al, 2019Singh et al, , 2020Sharma et al, 2021). The Tapar section has been dated as basal late Miocene (ca.…”

Section: Geological Settingmentioning

confidence: 99%

The Miocene fossil lizards from Kutch (Gujarat), India: a rare window to the past diversity of this subcontinent

et al. 2021

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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 squamates on this subcontinent is very limited. We here report on new lizard finds, which have been recovered from two stratigraphic levels: the older Palasava locality (dated to the middle Miocene, ca. 14 Ma) and the younger Tapar site (late Miocene, ca. 11–10 Ma). Although fragmentarily preserved, the material described here sheds important light on the composition and paleobiogeography of squamates during the Miocene in South Asia. The older Palasava locality contains cf. Uromastyx s.l. and Varanus sp., the latter representing the oldest record of this taxon in the region of India south of the Himalayas and its occurrence here suggests a mean annual temperature not less than 15°C. The material from the younger Tapar locality consists of an unidentified acrodontan lizard, here questionably placed in agamids, and a skink. The latter shows a resemblance to mabuyines, however, the fragmentary nature of the material does not allow a precise allocation without doubts. The cosmopolitan mabuyines have been suggested to have their origin in Asia, so the potential presence of mabuyines in the Tapar locality might represent the first, but putative, Asian evidence of the occurrence of this group in the Miocene.

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“…In addition to foraminifers and mega‐invertebrates, the Palaeogene‐Neogene successions of the Kutch Basin are also known for their diverse marine mammalian faunas, notably whales and sea cows (Bajpai et al, 2006, 2009 and references therein; Carolin et al, 2023). Most recently, the Kutch Basin has also yielded a diverse land mammal fauna including hominoids of late Miocene age (Bhandari et al, 2018, 2021). The Oligocene–Miocene sections of the Kutch Basin consist of both carbonate and siliciclastic units that provide a record of erosion and sedimentation, and their ages have been ascertained mainly based on foraminiferal assemblages (Biswas, 1982; Catuneanu & Dave, 2017; Raju, 2011).…”

Section: Introductionmentioning

confidence: 99%

Strontium isotope stratigraphy of marine Oligocene–Miocene sedimentary successions of Kutch Basin, western India

Singh,

Vadlamani,

Bajpai

et al. 2024

Geological Journal

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The Kutch Basin of western India exposes one of the most complete, fossiliferous marine Cenozoic sedimentary sequences of India. Precise depositional ages of these sequences are of great importance in the reconstruction of palaeoclimatic and palaeobiogeographic histories of the basin. Due to the poorly constrained foraminiferal biostratigraphic ages, we conducted high‐resolution 87Sr/86Sr chronology of the various fossiliferous, stratigraphically continuous units of Oligocene–Miocene strata in Kutch Basin. Besides updating the previously determined 87Sr/86Sr chronology, we report new numerical depositional ages for Oligocene–Miocene formations and members, and correlated these ages to the existing biostratigraphic schemes. The new 87Sr/86Sr data indicates a depositional age range between 28.64 + 0.29/‐1.11 and 23.51 + 1.53/‐1.85 Ma (Rupelian‐Chattian) for the Maniyara Fort Formation, between 23.07 + 0.94/1.39 and 18.09 + 0.24/‐0.57 Ma (Chattian‐Burdigalian) for the Khari Nadi Formation, and between 15.11 + 0.56/‐2.87 and 12.29 + 1.22/‐1.9 Ma (Langhian‐Serravallian) for the Chhasra Formation. The sedimentation rate, determined through numerical ages derived from 87Sr/86Sr, indicates an increase in sedimentation for the Khari Nadi (0.23 ± 0.04 cm/kyr) and Chhasra (0.12 ± 0.04 cm/kyr) formations, likely related to uplift of the Himalaya‐Tibetan plateau and intensification of the Indian Summer Monsoon. The bulk sediment element ratios (V/Ni, Ni/Co and V/Cr) indicate oxic to suboxic palaeo‐redox conditions during deposition of the Oligocene–Miocene successions of the basin. Based on new and updated 87Sr/86Sr chronology, the depositional environments and sedimentation rates of the Kutch sequence are correlated with changes in sea‐level, sedimentation rates in the Arabian Sea and Bay of Bengal, and the global climate changes across the Oligocene–Miocene boundary.

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First Miocene rodents from Kutch, western India

Cited by 11 publications

References 39 publications

A new genus of treeshrew and other micromammals from the middle Miocene hominoid locality of Ramnagar, Udhampur District, Jammu and Kashmir, India

A new genus of treeshrew and other micromammals from the middle Miocene hominoid locality of Ramnagar, Udhampur District, Jammu and Kashmir, India

The Miocene fossil lizards from Kutch (Gujarat), India: a rare window to the past diversity of this subcontinent

Strontium isotope stratigraphy of marine Oligocene–Miocene sedimentary successions of Kutch Basin, western India

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