Temporal range: Late Cretaceous, Maastrichtian
|Dorsal vertebra UBB NVM1-43|
Csiki et al., 2010
Csiki et al., 2010
Paludititan was a small member of the Sauropoda, with a shoulder height of about 2 metres (6 ft 7 in). Gregory S. Paul in 2016 estimated the length of Magyarosaurus dacus and Paludititan, by him considered a possible single taxon, at 6 m (20 ft), the weight at one tonne.
The fossil remains show at least four unique features, autapomorphies, which demonstrate that P. nalatzensis is a species distinct from comparable titanosaurians. In the rear vertebrae of the back, the top of the lamina centrodiapophysealis anterior, the front ridge on the underside of the lateral process, obliquely curving to the front and above runs parallel to the top of the lamina centrodiapophysealis posterior, the rear ridge, instead of touching it. In the vertebrae of the tail base and the first vertebrae of the middle tail, the neural spines, while being short and erect, possess a conspicuous corner on their front rim, projecting to the front. While vertebrae of the tail base and the first vertebrae of the middle tail are procoelous, thus with a concave front facet of the vertebral centre, some middle tail vertebrae more to the rear are amphiplatous, with flat front and rear facets; but they are again followed by procoelous middle tail vertebrae. The peduncle of the ischium, touching the ilium, has a conspicuous triangular process at the outer upper rear, forming a buttress that overlaps the ischial pedicel of the ilium.
In 2002, a Belgian-Romanian expedition uncovered a sauropod skeleton in the bed of the river Râul Mare, at Nǎlaț-Vad. It was at the time the most complete sauropod skeleton ever discovered in Romania. In 2010, the type species Paludititan nalatzensis was named and described by Zoltán Csiki, Vlad Codrea, Cǎtǎlin Jipa-Murzea and Pascal Godefroit. The generic name is derived from Latin palus, "marsh" and Greek Titan. The specific name refers to its finding place Nǎlaț-Vad.
The holotype, UBB NVM1, was found in the Hațeg Basin, in a silty mudstone layer of the Sânpetru Formation, dating from the early Maastrichtian. It consists of a partial skeleton lacking the skull. It contains three dorsal vertebrae, at least nine caudal vertebrae, twelve chevrons, the right half of the pelvis, a left ischium, the lower end of the right thighbone, and two toe claws. The remains were not found in articulation but in such close association that it is likely they represent a single individual.
The describing authors of Paludititan considered the possibility that the skeleton was a specimen of Magyarosaurus dacus, a coeval titanosaurian sauropod sharing the same habitat. Overlapping remains were identical. On the other hand, they did not show any shared unique traits, synapomorphies, and M. dacus is known from a different location. They felt justified to name a separate taxon, pending further discoveries.
Paludititan was placed in 2010 in the Titanosauria. More precisely, it was considered a probable member of the Lithostrotia. Cladistic analysis suggested it was a sister species of the South American Epachthosaurus.
Paludititan lived on the Cretaceous Hațeg Island with a diverse assemblage of animals, including other island dwarfs such as its relative Magyarosaurus, the hadrosaurid Telmatosaurus and the iguanodontian Zalmoxes. Other endemic dinosaurs include the nodosaurid Struthiosaurus, several small, fragmentary maniraptorans Bradycneme, Elopteryx, Heptasteornis, and the avialan Balaur. The top predator of the island ecosystem was the giant azhdarchid pterosaur Hatzegopteryx.
Brasilotitan is a genus of titanosaurian sauropod dinosaur from the Late Cretaceous (early Maastrichtian) Adamantina Formation of Brazil. The type species is Brasilotitan nemophagus.Cetiosauridae
Cetiosauridae is a family of sauropod dinosaurs. While traditionally a wastebasket taxon containing various unrelated species, some recent studies have found that it may represent a natural clade. Additionally, at least one study has suggested that the mamenchisaurids may represent a sub-group of the cetiosaurids, which would be termed Mamenchisaurinae.Daxiatitan
Daxiatitan is a genus of titanosaur dinosaur from the Lower Cretaceous of Lanzhou Basin, Gansu Province, northwestern China. It is known from fossils including several neck vertebrae, a shoulder blade, and a thigh bone.It was a very large dinosaur, estimated at 23–30 meters (75–98 feet). Like both Euhelopus and Huanghetitan, it had an enormously long neck.Diplodocinae
Diplodocinae is an extinct subfamily of diplodocid sauropods that existed from the Late Jurassic to Early Cretaceous of North America, Europe and South America, about 161.2 to 136.4 million years ago. Genera within the subfamily include Tornieria, Supersaurus, Leinkupal, Galeamopus, Diplodocus, Kaatedocus and Barosaurus.Cladogram of the Diplodocidae after Tschopp, Mateus, and Benson (2015).Ferganasaurus
Ferganasaurus was a genus of dinosaur first formally described in 2003 by Alifanov and Averianov. The type species is Ferganasaurus verzilini. It was a sauropod similar to Rhoetosaurus. The fossils were discovered in 1966 in Kyrgyzstan from the Balabansai Formation and date to the Callovian stage of the Middle Jurassic.Flagellicaudata
Flagellicaudata is a clade of Dinosauria. It belongs to Sauropoda and includes two families, the Dicraeosauridae and the Diplodocidae.Gravisauria
Gravisauria is a clade of sauropod dinosaurs consisting of some genera, Vulcanodontidae and Eusauropoda.Huangshanlong
Huangshanlong is a genus of mamenchisaurid dinosaurs native to the Anhui province of China. It contains a single species, Huangshanlong anhuiensis. H. anhuiensis represents, along with Anhuilong and Wannanosaurus, one of three dinosaurs fround in Anhui province.Jiutaisaurus
Jiutaisaurus is a genus of sauropod dinosaur from the Quantou Formation of China. Jiutaisaurus was a sauropod which lived during the Cretaceous. The type species, Jiutaisaurus xidiensis, was described by Wu et al. in 2006, and is based on eighteen vertebrae.Kaijutitan
Kaijutitan (meaning "Kaiju titan" after the type of Japanese movie monsters) is a genus of basal titanosaur dinosaur from the Sierra Barrosa Formation from Neuquén Province in Argentina. The type and only species is Kaijutitan maui.Lithostrotia
Lithostrotia is a clade of derived titanosaur sauropods that lived during the Early Cretaceous and Late Cretaceous. The group was defined by Unchurch et al. in 2004 as the most recent common ancestor of Malawisaurus and Saltasaurus and all the descendants of that ancestor. Lithostrotia is derived from the Ancient Greek lithostros, meaning "inlaid with stones", referring to the fact that many known lithostrotians are preserved with osteoderms. However, osteoderms are not a distinguishing feature of the group, as the two noted by Unchurch et al. include caudal vertebrae with strongly concave front faces (procoely), although the farthest vertebrae are not procoelous.Mansourasaurus
Mansourasaurus ("Mansoura lizard") is a genus of herbivorous lithostrotian sauropod dinosaur from the Quseir Formation of Egypt. The type and only species is Mansourasaurus shahinae.
The discovery of Mansourasaurus was considered quite significant by paleontologists, because very few Late Cretaceous sauropod remains had been found in Africa where the rocky strata that preserve remains elsewhere and produce rich fossil beds were typically not found exposed at or near ground level.Microcoelus
Microcoelus is a dubius genus of small Titanosaurian sauropod dinosaur native to Argentina. It is known from only a single dorsal vertebra. A left humerus was formerly referred to this species, but it is now considered to belong to Neuquensaurus. This species may be a synonym of the contemporary sauropod Neuquensaurus australis.It was described by British paleontologist Richard Lydekker in 1893.Oceanotitan
Oceanotitan is a genus of titanosauriform sauropod known from the Upper Jurassic Praia da Amoreira-Porto Novo Formation of Portugal. It contains one species, Oceanotitan dantasi.The holotype consists of the scapula, almost all of the pelvis, a complete leg sans the toes, and nine caudals.Pilmatueia
Pilmatueia is a diplodocoid sauropod belonging to the family Dicraeosauridae that lived in Argentina during the Early Cretaceous.Tambatitanis
Tambatitanis is an extinct genus of titanosauriform dinosaur from the Early Cretaceous (probably early Albian) of Japan. It is known from a single type species, Tambatitanis amicitiae. It was probably around 14 meters long and its mass was estimated at some 4 tonnes. It was a basal titanosauriform and possibly belonged to the Euhelopodidae.Tastavinsaurus
Tastavinsaurus is a genus of sauropod dinosaur belonging to the Titanosauriformes. It is based on a partial skeleton from the Early Cretaceous of Spain. The type species is Tastavinsaurus sanzi, named in honor of the Rio Tastavins in Spain and Spanish paleontologist José Luis Sanz.Tengrisaurus
Tengrisaurus (meaning "Tengri lizard") is a genus of lithostrotian sauropod, from the Early Cretaceous (Barremian-Aptian), of the Murtoi Formation, Russia. It was described in 2017 by Averianov & Skutschas. The type species is T. starkovi.Vulcanodontidae
The Early Jurassic sauropod dinosaurs Zizhongosaurus, Barapasaurus, Tazoudasaurus, and Vulcanodon may form a natural group of basal sauropods called the Vulcanodontidae. Basal vulcanodonts include some of the earliest known examples of sauropods. The family-level name Vulcanodontidae was erected by M.R. Cooper in 1984. In 1995 Hunt et al. published the opinion that the family is synonymous with the Barapasauridae. One of the key morphological features specific to the family is an unusually narrow sacrum.