Dwarf dinos never really grew up at Neverland-like Island in TransylvaniaFebruary 12th, 2010 - 2:05 pm ICT by ANI
Washington, Feb 12 (ANI): A new study has confirmed that dwarf dinosaurs existed on an island in Transylvania, as well as explained how dinosaurs shrank during the Late Cretaceous at the Neverland-like place where they never really grew up.
Earlier, Hungarian baron Franz Nopcsa claimed that his sister in 1895 found bones belonging to dwarf dinosaurs on his family’s Transylvanian estate.
But now, according to a report in Discovery News, a new study not only confirms the existence of dwarf dinosaurs, but also explains how dinosaurs shrank at Hateg Island in Romania.
The study indicates that the unusual phenomenon appears to have only affected some of the island’s dinosaur residents.
“The other animals living with the dinosaurs - fish, frogs, albanerpetonids (salamander-like amphibians), turtles, crocodilians, pterosaurs, birds, lizards, snakes, and mammals - were generally much smaller anyway, but so far haven’t shown obvious size differences from mainland relatives,” lead author Michael J. Benton told Discovery News.
Benton, who directs the Palaeobiology and Biodiversity Research Group at the University of Bristol, and his colleagues conducted one of the most extensive studies yet on the Hateg Island dinosaur remains.
They analyzed the dinosaurs’ limb proportions and bone growth patterns, comparing them with those of mainland dinos.
The analysis determined that at least four of the Hateg dinosaurs were dwarves.
The diminutive dinosaurs included the titanosaurian sauropod Magyarosaurus, which had a body length of about 16 to 19 feet.
That’s impressive by human standards, but is miniature compared to a sauropod such as Argentinosaurus, which grew to be at least 82 feet long.
Another small dinosaur was the hadrosaurid Telmatosaurus. Its 13-foot-long body contrasted with the average size of other hadrosaurids, which were 23 to 33 feet long, according to Benton.
Two species of Zalmoxes dinosaurs also appear to have been dwarves, with one - Zalmoxes robustus - measuring about 10 feet in length.
“So these forms are all typically half the length of their close relatives on larger land masses, and this equates to a body mass of perhaps one-eighth that of the relatives,” said Benton.
“Body mass is what matters most in biological terms, such as physiology and food intake,” he added.
Magnified sections of the dinosaurs’ bones revealed that the animals were adults and not juveniles.
The scientists believe the dinosaurs likely shrank due to a process called progenesis, which shortens the developmental period.
Sexual maturity happened early, and these dinosaurs may have also died two to five years younger than their “normal”-sized counterparts. (ANI)
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Tags: amphibians, argentinosaurus, author michael, bone growth, crocodilians, dinosaurs, discovery news, growth patterns, hateg, limb proportions, michael j benton, neverland, pterosaurs, salamander, sauropod, size differences, transylvania, transylvanian, university of bristol, unusual phenomenon