Bajpai Sunil - Department of Earth Sciences,Indian Institute of Technology Roorkee
Bajpai Sunil
Sunil Bajpai Head of department 91-1332-285079
Areas of Interest
  • Paleontology , Biostratigraphy, Paleobiogeography, Paleoclimatology, Paleoecology
Professional Background
1996-01-01OngoingAssistant Professor/Associate Professor/ProfessorIIT Roorkee
Multiple Posts
2013-01-015 years DirectorBirbal Sahni Institute of Palaeosciences, Lucknow
Honors and Awards
Elected Fellow ( FASc)Indian Academy of Sciences2007
Elected Fellow (FNASc)National Academy of Sciences2008
National Geoscience Award Ministry of MInes, Government of India2014
National Award for Geosciences & TechnologyMinistry of Earth Sciences, Govt of India2018
Ramanna FellowshipDept. of Science and Technology, Government of India2008
President, The Palaeobotanical SocietyBirbal Sahni Institute of Palaeosciences, Lucknow2018
Co-leader, International Geological Correlation Programme 608 UNESCO/IUGS2018
Council MemberIndian Academy of Sciences2016
Member, Editorial Board Current Science2020
Chief EditorThe Palaeobotanist2018
Member, Editorial BoardJournal of Asian Earth Sciences2020
Member, Editorial BoardJournal of Asian Earth Sciences2020
Member, Editorial BoardIndian Journal of Geosciences2020
Post-doctoral Visitorship Smithsonian Institution, Washington DC, USA 1994
Commonwealth FellowshipUniversity of Wales, Aberystwyth, UK 1999
INSA-Royal Society Scientists’ Exchange Fellowship University of Wales, Aberystwyth, UK 2001
CNRS Professor Invitee National Museum of Natural History, Paris, France2002
JSPS Fellowship Kitakyushu Museum of Natural History, Kitasyushu, Japan2004
INSA-Royal Society Scientists’ Exchange Fellowship, University College London, UK2007
INSA Scientists’ Exchange Fellowship Seoul National University, Seoul, South Korea2011
Educational Details
Ph.D.PaleontologyCentre of Advanced Study in Geology, Panjab University, Chandigarh1990
Books Authored


  1. Bajpai, S. & Sahni, A., eds. (2009). India’s fossil biota: Current perspectives and Emerging Approaches. Journal of Biosciences, vol. 34, issue 5, special issue (Springer).
  1. Bajpai S., Garg R., Tripathi S.C. & Mohabey D.M. (2013). Bagh–Lameta sequences of Central and Western India. Field Guide of First International Symposium of the International Geoscience Programme Project 608, pp. 1–30, Birbal Sahni Institute of Palaeobotany, Lucknow.
  1. Bajpai, S., Tripathi, S.C. & Prasad, V., eds. (2018). The Indian Paleogene, pp. 327 (Springer).
Refereed Journal Papers



  1. Bajpai, S. & Kapur, V.V. (2020). India’s geodynamic evolution during the Eocene: perspectives on the origin and early evolution of modern mammal orders. Episodes. 020031.

  2. Bajpai, S., Singh, B.P., Patnaik, R., Srivastava, G. & Parmar, V. (2020). Himalayan Cenozoic Biotas and Climate: An Overview of Recent Advances. Proceedings of the Indian National Science Academy, 86 (1): 227-236.
  3. Kumar, K., Pandey, P., Bajpai, S., Bhattacharya, D. & Pandey, B. (2020). Middle Eocene (Bartonian) vertebrate fauna from Bandah Formation, Jaisalmer Basin, Rajasthan, Western India. Historical Biology, DOI: 10.1080/08912963.2020.1776708

  4.  Prasad, V., Uddandam,P.R., Agrawa S.,Bajpai, S., Singh, I.B., Mishra, A.K.,Sharma, A., Kumar, M. & Verma, P. (2020). Biostratigraphy, palaeoenvironment and sea level changes during pre-collisional (Palaeocene) phase of the Indian plate: palynological evidence from Akli Formation in Giral Lignite Mine, Barmer Basin, Rajasthan, Western India. Episodes,

  5. Verma, P., Garg, R., Rao, M.R. &  Bajpai, S. (2019).  Palynofloral diversity and palaeoenvironments of early Eocene Akri lignite succession, Kutch Basin, western IndiaPalaeobiodiversity and Palaeoenvironments, doi. 10.1007/s12549-019-00388-1

  6. Bhandari, A., Kay, R.F., Williams, B.A., Tiwari, B.N., Bajpai, S. & HieronymusT. (2018). First record of the Miocene hominoid Sivapithecus from Kutch, Gujarat state, western India. Plos One.  | 

  7. Prasad , V., Farooqui, A., Murthy, S., Sarate , O.S. &  Bajpai, S. (2018). Palynological assemblage from the Deccan Volcanic Province, central India: Insights into early history of angiosperms and the terminal Cretaceous paleogeography of peninsular India. Cretaceous Research, 86: 186-198.
  8. Retallack, G.J., Bajpai, S., Liu, X., Kapur, V. V. & Pandey, S.K. (2017). Advent of strong South Asian monsoon by 20 million years ago. Journal of Geology,
  9. Chatterjee, S., Scotese, C. & Bajpai, S. (2017). The restless Indian plate and its epic voyage from Gondwana to Asia: its tectonic, paleoclimatic and paleobiogeographic evolution. Geological Society of America, Special Paper 529, pp. 147.
  10. Agrawal, S., Verma, P., Rao, M.R., Garg, R., Kapur, V.V. & Bajpai, S. (2017). Lignite deposits of the Kutch Basin, western India: carbon isotopic and palynological signatures of the early Eocene hyperthermal event ETM2. Journal of Asian Earth Sciences, 146: 296-303.
  11. Kapur, V.V., Das, D.P., Bajpai, S. & Prasad, G.V.R. (2017). First mammal of Gondwanan lineage in the early Eocene of India. Comptes Rendus Palevol. doi:10.1016/j.crpv.2017.01.002.
  12. Jain, S., Rai, N., Kumar, G., Aggarwal, P.P., Thangaraj, K., Bajpai, S. & Pruthi, V. (2017). Ancient DNA reveals Late Pleistocene existence of ostriches in Indian sub-continent. PlosOne, doi:10.1371/journal.pone.0164823.
  13. Jain, S., Bajpai, S., Kumar, G. & Pruthi, V. (2016). Microstructure and crystallography of fossil ostrich eggshells from Upper Palaeolithic sites of Indian peninsular region. Micron. doi: 10.1016/j.micron.2016.02.012. 
  14. Rai, J., Bajpai, S., Kumar, R., Singh, A., Kumar, K. & Prakash, N. (2016). The earliest marine transgression in western India: new insights from calcareous nannofossils from Lathi Formation, Jaisalmer Basin. Current Science, 111 (10): 1631-1639.
  15. Chatterjee, S. & Bajpai, S. (2016). India’s northward drift from Gondwana to Asia during the late Cretaceous- Eocene. Proceedings of the Indian National Science Academy, 82 (3), Special Issue: 479-487.
  16. Cooper, L.N., Clementz, M., Usip, S., Bajpai, S., Hussain, S.T. and Hieronymus, T.L. (2016) Aquatic habits of cetacean ancestors: integrating bone microanatomy and stable isotopes. Integrative and Comparative Biology, 1–15, doi:10.1093/icb/icw119.
  17. Prasad, G.V.R. & Bajpai, S. (2016). An overview of recent advances in the Mesozoic–Palaeogene vertebrate paleontology in the context of India’s northward drift and collision with Asia. Proceedings of the Indian National Science Academy, 82 (3), Special Issue: 537-548.
  18. Kapur, V. & Bajpai, S. (2015).   Oldest South Asian tapiromorph (Perissodactyla, Mammalia) from the Cambay Shale Formation, western India, with comments on its    phylogenetic position and biogeographic implications. The Palaeobotanist, 64(1):95–103.
  19. Moran, M.M., Bajpai, S., George, J.C., Suydam, R., Usip, S. and Thewissen, J.G.M. (2015). Intervertebral and Epiphyseal Fusion in the Postnatal Ontogeny of Cetaceans and Terrestrial Mammals. Journal of Mammalian Evolution, 22 (1): 93-109.
  20. Bajpai, S. and Thewissen, J.G.M. (2014). Protocetid cetaceans (Mammalia) from the Eocene of India. Palaeontologia Electronica, 17.3.34A.
  21. Cooper, L.N., Hieronymus,T.L., Vinyard, C.J., Bajpai, S.  and Thewissen, J.G.M. (2014). New Applications for Constrained Ordination: Reconstructing Feeding Behaviors in Fossil Remingtonocetinae (Cetacea: Mammalia). In: Experimental Approaches to Understanding Fossil Organisms (Eds. Hembree, Daniel I., Platt, Brian F., Smith, Jon J.), 89-107 (Springer).
  22. Bajpai, S., Holmes, J., Bennett, C., Mandal, N. and Khosla, A. (2013). Palaeoenvironment of Peninsular India during the late Cretaceous Deccan volcanic episode from trace-element and stable-isotope geochemistry of Intertrappean ostracod shell. Global and Planetary Change, 107: 82-90.
  23. Shukla, S. and Bajpai, S. (2013). Oligocene larger foraminiferal biostratigraphy and SBZ zonation on western continental shelf, India. ONGC Bulletin, 48(5): 35-41.
  24. Prasad, V. Singh, I.B., Bajpai, S., Garg, R., Thakur, B., Singh, A., Saravanan, N. and Kapur, V.V. (2013). Palynofacies and sedimentology- based high resolution sequence stratigraphy of the lignite bearing muddy coastal deposits (early Eocene) from Vastan lignite mine, Gulf of Cambay, India. Facies, 59 (4): 737-761.
  25. Armfield, B. A., Zheng, Z., Cohn, M.J., Bajpai, S., Vinyard, C. J. and Thewissen, J. G. M. (2013). Development And Evolution of The Unique Cetacean Dentition. Peerj (
  26. Verma, P., Mandal, N., Rao, M.R., Thakkar, M. G. and Bajpai, S. (2013). Palynological record from Chhasra Formation (Early Miocene), Eastern Kutch, Gujarat. The Palaeobotanist62 (2): 149-155.
  27. Bajpai, S., Prasad, G.V.R., Prasad, V., Krishna, J. and Sarkar, A. (2012). Recent Advances on Phanerozoic Biodiversity, Bioevents and Climate in India. Proceedings of the Indian National Science Academy, 78 (3):  445-455.
  28. Cooper, L. N. & Thewissen, J. G. M., Bajpai, S. & Tiwari, B. N. (2012). Morphology and locomotion of the Eocene raoellid Indohyus (Artiodactyla: Mammalia). Historical Biology, 24(3): 279-310.
  29. Bajpai, S., Thewissen, J. G. M. & Conley, R.W. (2011). Cranial anatomy of middle Eocene Remingtonocetus (Cetacea, Mammalia) from Kutch, western India. Journal of Paleontology, 85(4): 705–720.
  30. Thewissen, J. G. M., Sensor, J.D., Clementz, M., & Bajpai, S. (2011). Evolution of dental wear and diet during the origin of whales. Paleobiology, 37(4):  655–669.
  31. Clementz, M., Bajpai, S., Ravikant, V., Thewissen, J. G. M., Saravanan, N., Singh, I. B. & Prasad, V. (2010). Early Eocene Warming Events and the timing of terrestrial faunal exchange between India and Asia. Geology, 39: 15-18.
  32. Keller, G. Adatte, T., Pardo, A., Bajpai, S. Khosla, A. & Samant, B. (2010). Cretaceous extinctions: Evidence overlooked. Science, 328: 974-975.
  33. Bajpai, S., Domning, D.P., Das, Jorge, V. J. & Mishra, V. P. (2010). A new fossil sirenian (Mammalia, Dugonginae) from the Miocene of India., Neues Jahrbuch für Geologie und Paläontologie 258(1): 39-50.
  34. Ravikant, V. & Bajpai, S. (2010).  Strontium isotope evidence for the age of Eocene fossil whales of Kutch, western India. Geological Magazine, 147 (3): 473–477.
  35. Bhandari, A, Mohabey, D.M., Bajpai, S., Tiwari, B.N. & Pickford, M. (2010). Early Miocene mammals from central Kutch (Gujarat) western India: implications for geochronology, biogeography, eustacy and intercontinental dispersalsNeues Jahrbuch für Geologie und Paläontologie,  256(1): 69-97.
  36. Archibald, J. D., Clemens,  W. A., Padian, K., Rowe, T., MacLeod, N.,  Barrett,  P. M., Gale, A., Holroyd, P., Sues, HD., Arens, N.C., Horner, J.R., Wilson, G.P.,      Goodwin, M. B., Brochu, C.A., Lofgren, D.L., Hurlbert, S.H., Hartman, J.H., Eberth, D.A., Wignall, P. B.,  Paul B. Wignall, Currie, P.J., Weil, A., Prasad,  G.V.R., Dingus, L., Courtillot, V., Milner, A., Milner, A., Bajpai, S., Ward, D.J. & Sahni, A. (2010). Cretaceous extinctions: multiple causes. Science, 328: 973.
  37. Vega, F. J., Tiwari, J. K. and Bajpai, S. (2010). Additions to Palaeocarpilius rugifer Stoliczka from the Oligocene of Kutch, western India. Bulletin of the Mizunami Fossil Museum, 36: 45–49.
  38. Das, D. P., Bajpai, S., Thewissen, J. G. M.  & Mishra, V. P. (2009). An unusual  specimen of the Eocene whale Remingtonocetus (Cetacea, Mammalia) from Kutch, India. Journal of the Palaeontological Society of India, 54(2): 225-227.
  39. Bajpai, S. (2009). Biotic perspective of the Deccan volcanism and India-Asia collision: Recent advances. In: Current trends in Science, Platinum Jubilee Special publication, Indian Academy of Sciences, pp. 505-516.
  40. Bajpai, S., Thewissen, J. G. M. & Sahni. A. (2009). The origin and early evolution of whales: Macroevolution documented on the Indian Subcontinent. Journal of Biosciences 34(5): 673–686.
  41. Keller, G., Sahni, A. & Bajpai, S. (2009). Deccan Volcanism, the KT Mass Extinction and Dinosaurs. Journal of Biosciences, 34(5): 709-728.
  42. Thewissen, J. G. M. & Bajpai, S. (2009). New skeletal material of Andrewsiphius and Kutchicetus, two Eocene cetaceans from India. Journal of Paleontology, 83(5): 635-663.
  43. Bajpai, S., Kapur, V. V. and Thewissen, J. G. M. (2009).  Creodont and condylarth from Cambay Shale (early Eocene, ~55-54 Ma), Vastan Lignite Mine, Gujarat, western India. Journal of the Palaeontological Society of India, 54(1): 103-109.
  44. Bajpai, S., Domning, D.P., Das, D. P. & Mishra, V. P. (2009). A new middle Eocene sirenian (Mammalia, Protosirenidae) from India. Neues Jahrbuch für Geologie und Paläontologie, 252(3): 257-267.
  45. Whiso, K., Tiwari, B. N., Bajpai, S., Cooper, L. N. & Thewissen, J. G. M. (2009). A fossil mammal from marine Eocene strata (Jaintia Group) of the Mikir Hills, Assam, northeastern India. Journal of the Palaeontological Society of India, 54(1): 111-114.
  46. Thewissen, J. G. M., Cooper, L. N., George, J. C. & Bajpai, S. (2009). From Land to Water: the Origin of Whales, Dolphins, and Porpoises. Evolution: Education and Outreach, 2:272–288.
  47. Keller, G., Adatte, T., Bajpai, S., Mohabey, D.M., Widdowson, M., Khosla, A., Sharma, R., Khosla, S. C., Gertsch, B., Fleitmann, D. & Sahni, A. (2009). K-T transition in Deccan Traps of central India marks major marine seaway across India. Earth and Planetary Science Letters, 282: 10-23.
  48. Thewissen, J. G. M., Cooper, L. N., Clementz, M. T., Bajpai, S. & Tiwari, B. N. (2009). Reply to: J. H. Geisler & J. M. Theodor, Hippopotamus and whale phylogeny. Nature, 458 (7236): E5.
  49. Thewissen, J. G. M. & Bajpai, S. (2009). A new Miocene sirenian from Kutch, India. Acta Palaeontologica Polonica, 54 (1): 7-13.
  50. Keller, G., Khosla, S.C., Sharma, R., Khosla, A., Bajpai, S. & Adatte, T. (2009)Early Danian Planktic Foraminifera from K-T Intertrappean beds at Jhilmili, Chhindwara District, Madhya Pradesh, India. Journal of Foraminiferal Research, 39: 40-55.
  51. Bajpai, S., Kay, R. F., Williams, B. A., Das, D. P., Kapur, V. V. & Tiwari, B. N. (2008).  The oldest Asian record of Anthropoidea. Proceedings of the National Academy of Sciences, USA, 105(32): 11093-11098.
  52. Keller, G., Adatte, T., Gardin, S., Bartolini, A. & Bajpai, S. (2008). Main Deccan volcanism phase ends near the K-T boundary: Evidence from the Krishna-Godavari Basin, SE India. Earth and Planetary Science Letters, 268: 293-311.
  53. Sharma, R.  Bajpai, S. & Singh, M. P. (2008). Freshwater Ostracoda from the (?) Paleocene-age Deccan intertrappean beds of Lalitpur (Uttar Pradesh), India. Journal of the Palaeontological Society of India, 53(2): 177-183.
  54. Thewissen, J. G. M. & Bajpai, S. (2008). New Oligocene mustelid from western India. Journal of Vertebrate Paleontology, 28(2):565-567.
  55. Bajpai, S. & Kapur, V. V. (2008). Earliest Cenozoic frogs from the Indian subcontinent: implications for out-of-India hypothesis. Journal of the Palaeontological Society of India, 53(1): 65-71.
  56. Garg, R., Ateequzzaman, K., Prasad, V., Tripathi, S.K.M., Singh, I.B., Jauhri, A.K. & Bajpai, S. (2008). Age-diagnostic dinoflagellate cysts from the lignite-bearing sediments of the Vastan lignite mine, Surat District, Gujarat, western India. Journal of the Palaeontological Society of India, 53(1): 99-105.
  57. Prasad, G. V. R. & Bajpai, S. (2008). Agamid lizards from the early Eocene of western India: oldest Cenozoic lizards from South Asia. Palaeontolgia Electronica, 11(1), 4A, 19p.
  58. Thewissen, J. G. M., Cooper, L. N., Clementz, M. T., Bajpai, S. & Tiwari, B. N. (2007). Whales originated from aquatic artiodactyls in the Eocene epoch of India. Nature, 450(20): 1190-1194.
  59. Bajpai, S., Das, D. P., Kapur, V.V., Tiwari, B. N. & Srivastava, S. S. (2007). Early Eocene rodents (Mammalia) from Vastan lignite mine, Gujarat, western India. Gondwana Geological Magazine, 22(2): 91-95.
  60. Chenet, A.-L., Quidelleu, X., Fluteau, F., Courtillot, V. && Bajpai, S. (2007). 40K-40Ar dating of the main Deccan large igneous province: Further evidence of  KTB age and short duration. Earth and Planetary Science Letters, 263: 1-15.
  61. Bajpai, S., Kapur, V.V., Das, D. P. & Tiwari, B. N.  (2007). New early Eocene primate (Mammalia) from Vastan lignite Mine, District Surat (Gujarat), western India. Journal of the Palaeontological Society of India, 52(2): 231-234.
  62. Bajpai, S. & Head, J. J. (2007). An early Eocene palaeopheid snake from Vastan lignite mine, Gujarat, India. Gondwana Geological Magazine, 22(2): 85-90.
  63. Nummela, S., Thewissen, J. G. M., Bajpai, S., Hussain, S.T. & Kumar, K.  (2007). Sound Transmission in Archaic and Modern Whales: Anatomical Adaptations for Underwater Hearing. The Anatomical Record:  Advances in Integrative Anatomy and Evolutionary Biology, 290 (6): 716 – 733.
  64. Bajpai, S., Thewissen J. G. M., Kapur, V.V., Tiwari, B. N. & Sahni, A. (2006). Eocene and Oligocene sirenians (Mammalia) from Kachchh, India. Journal of Vertebrate Paleontology, 26(2): 400-410.
  65. Whatley R. & Bajpai, S. (2006). Extensive endemism among the Maastrichtian  non-marine Ostracoda of India with implications for palaeobiogeography and “Out of India” dispersal. Revista Espanola de Micropaleontologia (Festschrift volume for Ernesto Perconig), 38 (2-3): 229-244.
  66. Kapur, V.V., Bajpai, S., Sarvanan. N. and  Das, D.P. (2006). Vertebrate fauna from Deccan Intertrappean beds near Bhanpura, District Mandsaur, Madhya Pradesh. Gondwana Geological Magazine, 21(1): 43-46.
  67. Bajpai, S., Kapur, V.V., Thewissen, J. G. M., Das, D. P., Sharma, R. & Tiwari, B. N. (2006). New early Eocene cambaythere (Perissodactyla, Mammalia) from the Vastan Lignite Mine (Gujarat, India) and an evaluation of cambaythere relationships. Journal of the Palaeontological Society of India, 51(1): 101-110.
  68. Thewissen, J. G. M., Cohn, M. J., Stevens, L. S., BajpaiS., Heyning, J. & Horton, W. E. Jr. (2006). Developmental basis for hind limb loss in dolphins and origin of the cetacean bodyplan. Proceedings of the National Academy of Sciences, USA, 103 (22): 8414-8418.
  69. Bajpai, S., Kapur, V.V., Thewissen, J. G. M., Tiwari, B. N., Das, D. P., Sharma, R. & Saravanan, N. (2005). Early Eocene primates from Vastan lignite mine, Gujarat, western India. Journal of the Palaeontological Society of India, 50 (2): 43-54.
  70. Whatley R. & Bajpai, S. (2005). Some aspects of the palaeoecology and distribution of non-marine Ostracoda from Upper Cretaceous intertrappean deposits and the Lameta Formation of peninsular India.  Journal of the Palaeontological Society of India, 50 (2): 61-76.
  71. Thewissen, J.G.M., Bajpai, S. & Hussain, S. T. (2005). New insectivorous placentals from the Eocene of Pakistan. Journal of the Palaeontological Society of India, 50 (2): 37-41.
  72. Samant. B. & Bajpai, S. (2005). Palynoflora from Lakshmipur intertrappean deposits of Kutch, Gujarat: Age implications. Journal of the Palaeontological Society of India, 50 (2): 169-176.
  73. Bajpai, S., Kapur, V.V., Das, D. P., Tiwari, B. N., Saravanan, N. & Sharma, R. (2005). Early Eocene land mammals from Vastan lignite mine, District Surat (Gujarat), western India. Journal of the Palaeontological Society of India, 50(1): 101-113.
  74. Bajpai, S., Kapur, V.V., Thewissen, J. G. M., Tiwari, B. N. & Das, D. P. (2005). First fossil marsupials from India: Early Eocene Indodelphis  n. gen. and Jaegeria n. gen. from Vastan lignite mine, District Surat, Gujarat. Journal of the Palaeontological Society of India, 50(1): 147-151.
  75. Prasad, G. V.R., Bajpai, S., Singh, S. & Parmar, V. (2005). First cricetid rodent (mammalian) from the Ladakh Molasse, Northwestern Himalaya, India: Age implications. Himalayan Geology, 26(1): 85-92.
  76. Bajpai, S. Mohabey, D.M., Kapur, V.V. & Sharma, R. (2004). Late Cretaceous (Maastrichtian) freshwater ostracod fauna from Deccan intertrap sediments from Phulsagar, Mandla District, M.P. Gondwana Geological Magazine, 19(2); 147-157.
  77. Bajpai, S. & Kapur, V.V. (2004). Oldest known gobiids  from Vastan Lignite Mine (early Eocene), District Surat, Gujarat. Current Science, 87(4): 433-435.
  78. Nummela, S., Thewissen, J. G. M., Bajpai, S., Hussain, S.T. & Kumar, K. (2004). Eocene evolution of whale hearing. Nature, 430: 776 – 778.
  79. Bajpai, S., Whatley R., Prasad, G. V. R. & Whittaker. J. E. (2004). An Oligocene non-marine ostracod fauna from the Basgo Formation (Ladakh Molasse), NW Himalaya, India. Journal of Micropalaeontology, 23 (1):3-9.
  80. Rage, J. C., Prasad, G. V.R. & Bajpai, S. (2004). Additional snakes from the uppermost Cretaceous (Maastrichtian) of India. Cretaceous Research, 25(3) 3: 425-434.
  81. Whatley R., Bajpai, S. & Whittaker. J. E. (2003). The identity of the non-marine ostracod Cypris subglobosa from the intertrappean deposits of peninsular India. Palaeontology, 46 (6): 1281-1296.
  82. Rage J.-C., Bajpai S., Thewissen J. G. M. & Tiwari B. N. (2003). Early Eocene snakes from Kutch, Western India, with a review of the Palaeophiidae. Geodiversitas, 25 (4): 695-716.
  83. Whatley R., Bajpai, S. & Whittaker. J. E. (2003). Freshwater ostracoda from the Upper Cretaceous intertrappean beds at Mamoni (Kota District), southeastern Rajasthan. Revista Espanola de Micropaleontologia, 35 (1): 75-86.
  84. Whatley R., Bajpai, S. & Whittaker. J. E. (2003). Indian intertrappean Ostracoda in the collection of the Natural History Museum, London. Cretaceous Research, 24, 73-88.
  85. Whatley, R.C., Bajpai, S. & Srinivasan. 2002. Upper Cretaceous nonmarine Ostracoda from intertrappean horizons in Gulbarga District, Karnataka State, South India. Revista Espanola de Micropaleontologia, 34 (2), 163-186.
  86. Whatley, R.C., Bajpai, S. & Srinivasan. 2002. Upper Cretaceous intertrappean non-marine Ostracoda from Mohagaonkala (Mohgaon-Kalan), Chhindwara District, Madhya Pradesh State, Central India. Journal of Micropalaeontology, 21(2): 105-114.
  87. Whatley R., Bajpai, S. & Whittaker. J. E. (2002). New records and new species of Ostracoda from Indian intertrappean deposits. Bolletina della Societa Paleontologica Italiana, 41 (n.2/3): 163-173. 
  88. Spoor, F., Bajpai, S., Hussain, S.T., Kumar, K., & Thewissen, J.G.M. (2002). Vestibular evidence for the evolution of aquatic behaviour in early cetaceans. Nature, 417: 163-166.
  89. Bajpai, S. & Thewissen, J.G.M. (2002). Vertebrate fauna from Panandhro lignite field (Lower Eocene), District Kachchh, western India. Current Science, 82(5): 507-509.
  90. Thewissen, J.G.M.& Bajpai, S. (2001). Dental morphology of Remingtonocetidae (Cetacea, Mammalia). Journal of Paleontology, 75 (2): 463-465.
  91. Bajpai, S. & Whatley, R. (2001). Late Cretaceous non-marine ostracods from the Deccan intertappean beds, Kora (western Kachchh, India). Revista Espanola de Micropaleontologia, 33(1): 91-111.
  92. Thewissen, J. G. M. & Bajpai, S. (2001). Whale origins as a poster child for  macroevolution.  Bioscience, 51:1037-1049.
  93. Samant. B. & Bajpai, S. (2001). Fish otoliths from the subsurface Cambay Shale (Lower Eocene), Surat Lignite Field, Gujarat (India). Current Science, 81(7): 758-759.
  94. Bajpai, S. & Thewissen, J. G. M. (2000). A new, diminutive Eocene whale from Kachchh (Gujarat, India) and its implications for locomotor evolution of cetaceans. Current Science, 79 (10): 1478-1482.
  95. Bajpai, S. & Prasad, G.V.R. (2000). Cretaceous age for Ir-rich Deccan intertrappean  deposits: palaeontological evidence from Anjar, western India. Journal of the Geological   Society, London, 157: 257-260.
  96. Whatley R. & Bajpai, S. (2000). Zoogeographical relationships of the Upper Cretaceous nonmarine Ostracoda of India. Current Science, 79 (6): 694-696.
  97. Whatley R. & Bajpai, S. (2000). A new fauna of Late Cretaceous non-marine Ostracoda  from the Deccan Intertrappean beds of Lakshmipur, Kachchh (Kutch) District, Gujurat,   western India. Revista Espanola de Micropaleontologia, 32 (3): 385-409.
  98. Whatley R. & Bajpai. S. (2000). Further non-marine Ostracoda from the late Cretaceous  intertappean deposits of the Anjar region, Kachchh, Gujarat, India. Revue de Micropaleontologie, 43 (1-2): 173-178.
  99. Bajpai, S. & Gingerich, P.D. (1998). A new Eocene cetacean from India and the time of origin of whales. Proceedings of the National Academy of Sciences, USA, 95: 15464-15468.
  100. Bajpai, S. & Thewissen, J.G.M. (1998). Middle Eocene cetaceans from the Harudi and Subathu formations of India. In: The Emergence of Whales (Ed. J.G.M. Thewissen), Plenum Publishing Corporation, New York: 213-233.
  101. Roe, L.J., Thewissen, J.G.M., Quade, J., O'Neil, J.R., Bajpai, S., Sahni. A. & Hussain, S.T. (1998). Isotopic approaches to understanding the terrestrial to marine transition of the earliest cetaceans. In: The Emergence of Whales (Ed. J.G.M. Thewissen), Plenum Publishing Corporation, New York: 399-422.
  102. Bajpai, S., Sahni, A. & Schleich, H.H. (1998). Late Cretaceous gekkonid eggshells from the Deccan intertrappeans of Kutch, India. In Contributions to the Herpetology of South Asia (Eds. H.H. Schleich, W. Kastle): 301-306.
  103. Bajpai, S. & Domning, D. P. (1997). A new dugongine sirenian from the early Miocene of India. Journal of Vertebrate Paleontology, 17(1): 219-228.
  104. Bajpai, S.,Srinivasan, S. & Sahni, A. (1997). Fossil turtle eggshells from the infratrappean beds of Duddukuru, Andhra Pradesh. Journal of the Geological Society of India, 49: 209-213.
  105. Bajpai, S. (1996). Iridium anomaly in Anjar intertrappean beds and the K/T boundary. Memoir of the Geological Society of India (Cretaceous Stratigraphy and Palaeoenvironments), 37: 313-319.
  106. Thewissen, J.G.M., Roe, L.J., Neil, J.R.O'., Hussain, S.T., Sahni, A. & Bajpai, S. (1996). Evolution of cetacean osmoregulation. Nature, 381: 379-380.
  107. Bajpai, S., Thewissen, J.G.M. & Sahni, A. (1996). Indocetus (Cetacea, Mammalia) endocasts from Kachchh (India). Journal of Vertebrate Paleontology, 6 (3): 582-584.
  108. Srinivasan, S., Bajpai, S. & Sahni, A. (1994). Charophytes from the Deccan intertrappean beds of peninsular India: Implications for age and correlation of peninsular India. Geobios, 27 : 559-571.
  109. Sahni, A., Tandon, S.K., Jolly, A. Bajpai, S., Sood, A. & Srinivasan, S. (1994). Late  Cretaceous dinosaur eggs and nesting sites from the Deccan volcano-sedimentary province of peninsular India. In: Dinosaur Eggs and Babies (Eds. K. Carpenter, J. Horner & K.F. Hirsch), Cambridge University Press: 204-226.
  110. Bajpai, S., Sahni, A. & Srinivasan, S. (1993). Ornithoid egshells from Deccan intertrappean beds near Anjar  (Kachchh), western India. Current Science, 64 (1): 42-45.
  111. Srinivasan, S., Sahni, A. & Bajpai, S. (1993).Fossil Charophyta from the Deccan intertrappean beds of Gurmatkal, Gulbarga District, Karnataka. Current Science, 63 (7): 396-398.
  112. Nolf, D. & Bajpai, S. (1992). Marine middle Eocene fish otoliths from India and Java. Bulletin de l’ Institut des Sciences de la Terre, 62:195-221.
  113. Sahni, A. & Bajpai, S. (1991). Eurasiatic elements in the Upper Cretaceous nonmarine biotas of penisular India. Cretaceous Research, 12: 177-183.
  114. Sahni, A., Kumar, G.,Srinivasan, S. & Bajpai, S. (1990). Review of Late Pleistocene ostriches (Struthio sp.) of India. Man and Environment, XV (1): 41-47.
  115. Bajpai, S., Srivastava & Jolly, A. (1989). Sirenian -Moerithere dichotomy: some evidence from the Middle Eocene of Kachchh, western India. Current Science, 58 (6): 304-306.
  116. Bhatia, S.B., Sirjana & Bajpai, S. (1989) Predation by gastropod drills on early Lutetian ostracods from Kutch, western India. Geobios, 22 (3): 387-394.
  117. Sahni, A., Kumar, G., Srinivasan, S. & Bajpai, S. (1989). Ultrastructure and taxonomy of ostrich eggshells from Upper Palaeolithic sites of India. Journal of the Palaeontological Society of India, 34: 91-98.
  118. Jolly, A. & Bajpai, S. (1988). Osteoglossidea from the Kalakot Zone (middle Eocene): Implications for palaeoecology, palaeobiogeography and correlation. Bulletin of the Indian Geologists' Association, 21(1): 71-79.
  119. Sahni, A. & Bajpai, S. (1988). Cretaceous -Tertiary boundary events: the fossil vertebrate, palaeomagnetic and radiometric evidence from peninsular India. Journal of the Geological Society of India, 32 (5): 382-396.
  120. Bajpai, S., Singh,M.P. & Singh, P. (1987). A new sirenian from the Miocene of  Kachchh. Journal of the Palaeontological Society of India, 32: 20-25.
  121. Bajpai, S. & Singh,R.Y. (1987). On some early Middle Eocene plant fossils from southwestern Kachchh, Gujarat. Bulletin of the Indian Geologists' Association, 20 (1): 51-57.





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