On September 2, 2018, the National Museum of Brazil (Museu Nacional) was gutted by fire. 2018 was the Museu Nacional’s 200th year.
This post is one of series in which I discuss an important specimens that may have been lost to science in the blaze.
In 1999, Alexander Kellner, a researcher at the Museu Nacional, published a paper describing the holotype for the genus Santanaraptor (“Santana Formation thief”). This holotype (MN 4802-V) consists of several bones of a juvenile individual and fragments of mineralized soft tissues (including epidermis, muscle, and possibly blood vessels).

CREDIT: Dornike CC BY-SA 4.0
Bibliography
Kellner, A. W. A. (1999). “Short Note on a new dinosaur (Theropoda, Coelurosauria) from the Santana Formation (Romualdo Member, Albian), northeastern Brazil”. Boletim do Museu Nacional (Serie Geologia). 49: 1–8.