Garumbatitan
| Garumbatitan Temporal range: Early Cretaceous,
| |
|---|---|
| |
| Restoration | |
Scientific classification 
| |
| Domain: | Eukaryota |
| Kingdom: | Animalia |
| Phylum: | Chordata |
| Clade: | Dinosauria |
| Clade: | Saurischia |
| Clade: | †Sauropodomorpha |
| Clade: | †Sauropoda |
| Clade: | †Macronaria |
| Clade: | †Titanosauriformes |
| Clade: | †Somphospondyli |
| Genus: | †Garumbatitan |
| Species: | †G. morellensis
|
| Binomial name | |
| †Garumbatitan morellensis Mocho et al., 2023
| |
Garumbatitan (meaning "Garumba giant") is an extinct genus of somphospondylan sauropod dinosaur from the Cretaceous Arcillas de Morella Formation of Spain. The genus contains a single species, G. morellensis, known from multiple partial skeletons.[1]
Discovery and naming
[edit]
In 1998, Miquel G. Fígols discovered the Sant Antoni de la Vespa fossil site of the Arcillas de Morella Formation in sediments of the Maestrat Basin near the city of Morella in Castelló, Spain. The Garumbatitan fossil material was subsequently unearthed during field expeditions in 2005 and 2008. The known fossils belong to multiple individuals of different sizes. The holotype, which constitutes the remains of the largest individual, includes a sequence of articulated cervical and dorsal vertebrae, a partial dorsal centrum, ribs, caudal vertebrae, chevrons, an interclavicle, both femora, tibiae, and fibulae, the right astragalus, most of the right pes, and two metatarsals. Some of the bones, including the cervical/dorsal vertebrae sequence some ribs, caudal vertebrae, chevrons, an incomplete ilium, and the left femur, tibia, and fibula, are still unprepared. Additional fossil material belonging to a smaller individual was found associated with the holotype, including ribs, both pubes, and two nearly complete hindlimbs with significant overlapping material with the holotype. These bones were assigned as a paratype specimen. Three left metatarsals and two left pedal phalanges were also referred to Garumbatitan. Additional bones belonging to smaller specimens indicate that the combined remains of Garumbatitan represent at least four individuals.[1]
The fossil material was first announced in a 2016 abstract, followed by a publication in 2017 by Mocho et al., which described it as an "indeterminate titanosauriform".[2][3]
In 2023, Mocho et al. described Garumbatitan morellensis as a new genus and species of somphospondylan sauropod based on these fossil remains. The generic name, "Garumbatitan ", combines a reference to "Mola de la Garumba", one of the highest peaks in the region, with the word "titan", a common suffix for the names of large sauropods, referencing the pre-Olympian gods of Greek mythology. The specific name, "morellensis", refers to the Arcillas de Morella Formation, as well as the nearby town of Morella where some of the first Spanish dinosaur remains were discovered, in addition to the remains of Garumbatitan.[1]
Description
[edit]
Many of the unique features of Garumbatitan are in its foot structure. These include the absence of a calcaneum, slender metatarsals with the first and fifth being shorter, a reduced ungual (claw) on the third toe, and the lack of toe bones for the fifth digit (a feature shared with titanosaurs). Furthermore, the femur of Garumbatitan had a well-developed lateral bulge which was possibly more pronounced than in any other sauropod. The tibia length is 64% of the femur length. In the related Tastavinsaurus, the tibia is 55% the length of the femur. The fibula of Garumbatitan is straight and robust, compared to the more curved fibula of Tastavinsaurus.[1]
Classification
[edit]A preliminary review of the Garumbatitan fossil material suggested that the taxon may have affinities to the 'Laurasiformes' within Somphosponyli.[3] However, this clade is problematic, as several studies have recovered it within various locations within Macronaria, with a drastically varying composition, or to be an unsupported paraphyletic group.[4] Mocho et al. (2023) recovered Garumbatitan as a basal somphospondylan member of the macronarian clade Titanosauriformes, failing to find support for the laurasiform clade. Their phylogenetic analyses placed Garumbatitan as more derived than Dongbeititan, but more basal than Tastavinsaurus. The results of their analyses are shown in the cladogram below:[1]
Paleoenvironment
[edit]
The Garumbatitan holotype was discovered in layers of the Arcillas de Morella Formation, which dates to the late Barremian age of the Early Cretaceous period. The styracosternan ornithopods Morelladon, Iguanodon bernissartensis, and cf. Mantellisaurus, as well as the spinosaurid theropods Vallibonavenatrix and Protathlitis have also been named from the formation.[5][6][7][8] Two turtle taxa (Brodiechelys royoi and Eodortoka), an unnamed leptocleidid plesiosaur, and indeterminate titanosauriform remains that are distinct from Garumbatitan have also been described.[9][10][1]
References
[edit]- ^ a b c d e f Mocho, Pedro; Escaso, Fernando; Gasulla, José M; Galobart, Àngel; Poza, Begoña; Santos-Cubedo, Andrés; Sanz, José L; Ortega, Francisco (2023-09-28). "New sauropod dinosaur from the Lower Cretaceous of Morella (Spain) provides new insights on the evolutionary history of Iberian somphospondylan titanosauriforms". Zoological Journal of the Linnean Society. doi:10.1093/zoolinnean/zlad124. ISSN 0024-4082.
- ^ Mocho, P.; Escaso, F.; Gasulla, J. M.; Galobart, A.; Poza, B.; Santos-Cubedo, A.; Sanz, J. L.; Ortega, F. (2016). "A new titanosauriform sauropod from the Arcillas de Morella Formation (Early Cretaceous, Spain)". Conference: VII International Symposium about Dinosaurs Palaeontology and their Environment.: 97–98.
- ^ a b Mocho, P.; Pérez-García, A.; Gasulla, J. M.; Ortega, F. (2017-07-28). "High sauropod diversity in the upper Barremian Arcillas de Morella Formation (Maestrat Basin, Spain) revealed by a systematic review of historical material". Journal of Iberian Geology. 43 (2): 111–128. doi:10.1007/s41513-017-0012-8. ISSN 1698-6180.
- ^ Royo-Torres, Rafael; Fuentes, Carolina; Meijide, Manuel; Meijide-Fuentes, Federico; Meijide-Fuentes, Manuel (2017). "A new Brachiosauridae Sauropod dinosaur from the lower Cretaceous of Europe (Soria Province, Spain)". Cretaceous Research. 80: 38–55. doi:10.1016/j.cretres.2017.08.012.
- ^ Gasulla, José Miguel; Escaso, Fernando; Narváez, Iván; Ortega, Francisco; Sanz, José Luis (2015). "A New Sail-Backed Styracosternan (Dinosauria: Ornithopoda) from the Early Cretaceous of Morella, Spain". PLOS ONE. 10 (12): e0144167. Bibcode:2015PLoSO..1044167G. doi:10.1371/journal.pone.0144167. PMC 4691198. PMID 26673161.
- ^ Gasulla, José M.; Escaso, Fernando; Ortega, Francisco; Sanz, José L. (January 2014). "New hadrosauriform cranial remains from the Arcillas de Morella Formation (lower Aptian) of Morella, Spain". Cretaceous Research. 47: 19–24. doi:10.1016/j.cretres.2013.10.004.
- ^ Santos-Cubedo, A.; de Santisteban, C.; Poza, B.; Meseguer, S. (2023). "A new spinosaurid dinosaur species from the Early Cretaceous of Cinctorres (Spain)". Scientific Reports. 13 (1). 6471. doi:10.1038/s41598-023-33418-2. hdl:10234/203142.
- ^ Pérez-García, A.; Gasulla, J. M.; Ortega, F. (2014-03-01). "Eodortoka morellana gen. et sp. nov., the first pan-pleurodiran turtle (Dortokidae) defined in the Lower Cretaceous of Europe". Cretaceous Research. 48: 130–138. doi:10.1016/j.cretres.2013.12.004. ISSN 0195-6671.
- ^ Quesada, Juan M.; Pérez-García, Adán; Gasulla, José Miguel; Ortega, Francisco (2019-02-01). "Plesiosauria remains from the Barremian of Morella (Castellón, Spain) and first identification of Leptocleididae in the Iberian record". Cretaceous Research. 94: 8–24. doi:10.1016/j.cretres.2018.10.010. ISSN 0195-6671. S2CID 134139253.
