In this case, we're very lucky in that it's not just the bones; we have all of the armour, the osteoderm
is preserved, we also have all the skin preserved and it is in three dimensions.
A paramedian dorsal osteoderm
of an aetosaurine (NSM012GF032.
Then we assigned each isolated osteoderm
to one of the six regions using as criteria its symmetry, dimensions, texture, and thickness (Gillette and Ray, 1981; Castro-Azuara, 1997).
On display is an osteoderm
, or bony skin growth, of a Titanosaur, part of a sauroped group that reached the largest sizes and lived between 65,000,000 and 71,000,000 years ago.
: CFM-960, 972, 1774, 1912, 1913, 1916 and 1923 among others, display particular characteristics found in Gavialosuchus like: absence of the spine or dorsal ridge and the presence of holes distributed more or less in a radial way in the osteoderms
with an oval pattern and random way in a rectangular osteoderm
Strahm and Schwartz (1977) primarily used a new character, the development of the osteoderm
canal system, to characterize the two nominal genera.
The only identified marine turtle bone came from XU8B--an osteoderm
(upper carapace or plastron) fragment weighing 21.
The dorsal surface is fully covered by circular pits, with the exception of the anterior margin, which is smooth to allow for the overlapping articulation with the anterior osteoderm
morphology in recent and fossil Euphractinae Xenarthrans.
A histological section of a Holmesina osteoderm
shows a superficial layer, integrated by mineralized fibers, and a deep arca of compact bone perforated by vascular channels.
The anterior ventral element associated with TMM 40146-6 bears a single row of large pits immediately posterior to a broad, flat region that would have passed dorsal to the osteoderm
immediately in front of it.
2009): The titanosaur (Dinosauria: Sauropoda) osteoderm
record: review and first definitive specimen from India.