Open Paleo

Pradhania

Kutty et al., 2007 prad-han-ee-uh

Named in honor of Dhuiya Pradhan, a fossil collector at the Indian Statistical Institute who contributed to paleontological work in India

201.4–192.9 million years ago Hettangian–Sinemurian, Early Jurassic
Early Jurassic stages

Pradhania is a genus of plateosaurian sauropodomorph dinosaur from the Early Jurassic Dharmaram Formation of India. The genus contains a single species, Pradhania gracilis, known from a partial skeleton that includes skull elements, vertebrae and an incomplete hand.

Under dispute

The relationships of Pradhania gracilis are unresolved, and its fragmentary holotype has left it unstable in every dataset that includes it. Kutty and colleagues (2007) originally recovered it as a stem sauropodomorph falling below Plateosauria, but at bootstrap support under 50%, and stated that more precise relationships could not be determined from their matrix; Knoll (2010) likewise concluded that the incomplete type material prevents its position from being decided. Reanalysis by Novas and colleagues (2010) moved it into Massopoda and nested it within Massospondylidae on two synapomorphies. Later work instead draws it toward the unaysaurids: Ezcurra and colleagues (2023) identified it as the wildcard taxon responsible for a large polytomy at the base of Plateosauria and recovered it as the earliest-diverging unaysaurid in part of their tree sample, Wang and colleagues (2025) placed it with Macrocollum and Musankwa at the base of Massopoda, and Barrett and colleagues (2026) recovered it within Unaysauridae. Plateosauria is the least-inclusive clade common to every analysis since the original description.

Diagnosis

  1. Maxilla with very prominent medial longitudinal ridge overhanging alveolar margin
  2. Cranial cervical vertebrae extremely elongated with central length ~4.5 times its height
  3. Spatulate teeth with coarse obliquely oriented denticles (17 or more per tooth)
  4. Cervical vertebrae with extremely low neural spines
  5. Ungual phalanx of manual digit I strongly recurved with prominent flexor tubercle and bilateral claw grooves

Species

Pradhania gracilis Kutty et al., 2007

Type species

From Latin 'gracilis' meaning 'slender' or 'graceful', referring to the gracile nature of the animal.

Holotype
ISIR 265 , Geology Museum, Indian Statistical Institute
Material
Incomplete skeleton: skull elements (maxilla, supraoccipital, dentary), cervical and sacral vertebrae, incomplete left manus.
Horizon
upper Dharmaram Formation, Hettangian–Sinemurian, Early Jurassic , 201.4–192.9 million years ago
Locality
Northwest of Krishnapur village, Telangana, India

References

  1. Kutty, T. S.; Chatterjee, S.; Galton, P. M.; Upchurch, P. (2007). Basal sauropodomorphs (Dinosauria: Saurischia) from the Lower Jurassic of India: their anatomy and relationships. Journal of Paleontology 81(6): 1218-1240. Cambridge University Press (CUP). doi:10.1666/04-074.1

    Recovered Pradhania as a stem sauropodomorph below Plateosauria at bootstrap support under 50%.

    kutty2007a
  2. Knoll, F. (2010). A primitive sauropodomorph from the upper Elliot Formation of Lesotho. Geological Magazine 147(6): 814-829. Cambridge University Press (CUP). doi:10.1017/s001675681000018x

    Judged the holotype too incomplete to decide the phylogenetic position of Pradhania.

    knoll2010a
  3. Novas, F. E.; Ezcurra, M. D.; Chatterjee, S.; Kutty, T. S. (2010). New dinosaur species from the Upper Triassic Upper Maleri and Lower Dharmaram formations of Central India. Earth and Environmental Science Transactions of the Royal Society of Edinburgh 101(3-4): 333-349. Cambridge University Press (CUP). doi:10.1017/S1755691011020093

    Recovered Pradhania as a massospondylid.

    novas2010a
  4. Ezcurra, M. D.; Müller, R. T.; Novas, F. E.; Chatterjee, S. (2023). Osteology of the sauropodomorph dinosaur Jaklapallisaurus asymmetricus from the Late Triassic of central India. The Anatomical Record. Wiley. doi:10.1002/ar.25359

    Identified Pradhania as the wildcard taxon behind a large polytomy at the base of Plateosauria, and recovered it as the earliest-diverging unaysaurid in part of the tree sample.

    ezcurra2023a
  5. Wang, Y. M.; Zhang, Q. N.; Wang, Y. C.; Xu, H.; Chen, J.; Feng, Z.; Xu, X.; Wang, T.; You, H. L. (2025). A new Early Jurassic dinosaur represents the earliest-diverging and oldest sauropodomorph of East Asia. Scientific Reports 15(1). Springer Science and Business Media LLC. doi:10.1038/s41598-025-12185-2

    Recovered Pradhania with Macrocollum and Musankwa at the base of Massopoda.

    wang2025a
  6. Barrett, P. M.; Botha, J.; Sciscio, L.; Stuart, B. P.; Lovegrove, J.; Munyikwa, D.; Zondo, M.; Broderick, T. J.; Edwards, S. F.; Mbambo, E.; Chapelle, K. E. J.; Dollman, K. N.; Tolan, S.; Choiniere, J. N. (2026). A new sauropodomorph dinosaur from the Pebbly Arkose Formation (Upper Triassic: Norian) of Kariba, Zimbabwe. Journal of Systematic Palaeontology 24(2): 2678610. Informa UK Limited. doi:10.1080/14772019.2026.2678610

    Recovered Pradhania within Unaysauridae.

    barrett2026a