Kellner has over 500 publications to his name, has published more than 160 primary studies and two science books. He has participated in paleontological expeditions to many locations including Brazil, Chile, Iran, the United States, Argentina, China, and Antarctica.
His scientific achievements include the description of more than thirty species. For his work he has received several honors and prizes, including the TWAS Prize for Earth Sciences from The World Academy of Sciences and admission to the National Order of Scientific Merit (class Comendador), one Brazil's most prestigious awards.
Biography
Kellner was born in Vaduz, Liechtenstein, son of a German father and Austrian mother.[2] In his early childhood he moved with his parents to Brazil, where he became naturalised Brazilian.[1]
As part of his work on flying reptiles, Kellner organised the Pterosaur Workshop at Pittsburgh, USA, in 1995,[4] and the first pterosaur symposium ever held at the American Museum of Natural History in 1996. As well, he was involved in the organisation of several scientific meetings in Rio de Janeiro such as the 31st International Geological Congress in 2000 and the 2nd Latin-American Congress of Vertebrate Paleontology in 2002.[1]
Kellner has over 500 publications to his name (including abstracts and science articles). He has published more than 160 primary studies[4] and two science books: Pterossauros - os senhores do céu do Brasil ("Pterosaurs — Lords of the Brazilian Sky")[9] and the novel Na terra dos titãs ("In the Land of the Titans").[10] He has also taken part in documentaries about fossils (e.g., Antarctica - a Summer of 70 million Years and Dinosaur Hunters).[citation needed]
Besides his teaching activity, having advised over fifteen master and Ph.D. students, Kellner has been active in the propagation of scientific knowledge to the general public. He organised the 1999 exposition No Tempo dos Dinossauros ("In the Time of the Dinosaurs") at the Museum of Earth Sciences, which has been regarded as a landmark for the establishment of paleontology in Brazil, attracting the attention of the people of Brazilian to the studies of fossils.[1] In 2006 he organized the mounting of the first large-scale dinosaur skeleton in Brazil, that of the sauropodMaxakalisaurus topai, for which he received recognition from the Brazilian Congress.[5][11] Since 2004 he has written a monthly column in Caçadores de Fósseis (Fossil Hunters), on the website Ciência Hoje On Line, a project of the Brazilian Society for Scientific Progress.[12]
Apart from studying their fossils, Kellner has performed important theoretical work on pterosaurs, including cladistic studies regarding their phylogeny. In this he is the founder of a distinctive Brazilian school of the study of pterosaurs, with its own favoured phylogenetic model, clade terminology and nomenclature. Rival models and nomenclatural choices have been devised by the influential British pterosaur researcher David Unwin.[citation needed]
Kellner's scientific achievements include the description of more than thirty species, of which Santanaraptorplacidus (1996, 1999) is among the best examples of soft tissue preservation, including blood vessels and muscle fibers, reported in any dinosaur. The pterosaur Thalassodromeus sethi, which Kellner described in 2002 with his colleague Diogenes de Almeida Campos, allowed for the establishment of a new hypothesis regarding the use of the head crest in body temperature regulation of pterosaurs.[1]
A complete list of new species described and named by Kellner, sometimes in cooperation with other researchers, includes:
