This paper is a detailed description of Gondwanatitan foustoi, a new species of titanosaur (a sauropod) from Brazil. This new species is based upon specimen number MN 4111-V at the Museu Nacional. The material includes several vertebrae, part of a shoulder blade, parts of the hips, upper arm and lower leg bones, and some ribs.Continue reading “A Lost Titan – #365papers – 2018 – 65”
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).
This year, the Museu Nacional celebrated its 200th year. I am hopeful all is not lost.
Lapa Vermelha IV Hominid 1, informally referred to as Luzia, was discovered in 1975 in a rock shelter locality near Belo Horizonte, Brazil, by a French and Brazilian team led by Annette Laming-Emperaire. At the time, Laming-Emperaire felt that this was among the oldest human remains found in South America.
This paper presents a detailed discussion of tooth development in fishes. In particular, the authors review the state of knowledge of tooth development in placoderms, among the first of the jawed fishes and now extinct. They also make observations about denticles, tooth-like bumps, on the gill arches of many fishes, including jawless forms, and how the development of these relate the development of teeth and external scales in early fishes. With these details, the authors propose a hypothesis for the origins and development of teeth in placoderms and in modern fishes.Continue reading “Pharyngeal Denticles and the Placoderms – #365papers – 2018 – 58”