Leonardo Kerber
Universidade Federal de Santa Maria
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Featured researches published by Leonardo Kerber.
Anais Da Academia Brasileira De Ciencias | 2016
Thais M.F. Ferreira; Adriana Itati Olivares; Leonardo Kerber; Leonardo S. Avilla
Echimyidae (spiny rats, tree rats and the coypu) is the most diverse family of extant South American hystricognath rodents (caviomorphs). Today, they live in tropical forests (Amazonian, coastal and Andean forests), occasionally in more open xeric habitats in the Cerrado and Caatinga of northern South America, and open areas across the southern portion of the continent (Myocastor). The Quaternary fossil record of this family remains poorly studied. Here, we describe the fossil echimyids found in karst deposits from southern Tocantins, northern Brazil. The analyzed specimens are assigned to Thrichomys sp., Makalata cf. didelphoides and Proechimys sp. This is the first time that a fossil of Makalata is reported. The Pleistocene record of echimyids from this area is represented by fragmentary remains, which hinders their determination at specific levels. The data reported here contributes to the understanding of the ancient diversity of rodents of this region, evidenced until now in other groups, such as the artiodactyls, cingulates, carnivores, marsupials, and squamate reptiles.
Zootaxa | 2018
Micheli Stefanello; Rodrigo Temp Müller; Leonardo Kerber; Ricardo N. Martínez; Sérgio Dias-da-Silva
Ecteniniidae comprises an endemic radiation of carnivore probainognathian cynodonts from the Late Triassic of South America. Three taxa have been included in this clade: Ecteninion lunensis Martínez et al., 1996 and Diegocanis elegans Martínez et al., 2013 from Argentina, and Trucidocynodon riograndensis Oliveira et al., 2010 from Brazil. Herein, a new specimen (skull and mandible) assigned to T. riograndensis from the Carnian of the Candelária Sequence (Southern Brazil) is described. A phylogenetic analysis recovered the new specimen as the sister taxon of the holotype of T. riograndensis, and both in a trichotomy with E. lunensis and D. elegans, all supporting the monophyly of Ecteniniidae. The new specimen of T. riograndensis is almost 20% larger than its holotype. Therefore, it represents one of the largest specimens of a carnivorous probainognathian from the Late Triassic known to date and contributes to knowledge of size variation in ecteniniids.
Historical Biology | 2018
Leonardo Kerber; Marcos César Bissaro Júnior; Francisco Ricardo Negri; Jonas P. De Souza-Filho; Edson Guilherme; Annie Schmaltz Hsiou
Abstract Recently, the fossil record of rodents from southwestern Brazilian Amazonia has been reviewed with regards to its diversity as well as its ecological relationships. In the reviews, the necessity to report new specimens collected with stratigraphic control was stated. Here, a new dinomyid specimen collected during a 2015 expedition to the Niterói locality, Acre River, is reported. The material is a fragment of skull with the right P4–M1 and the left P4–M2 preserved. The cheek teeth are protohypsodont, a characteristic employed to differentiate Potamarchinae dinomyids from the euhypsodont dinomyids Eumegamyinae and Tetrastylinae. The occlusal surface of the cheek teeth is composed of lophs with interruptions, showing little wear, which suggests that the specimen is not fully ontogenetically developed. The specimen has a unique combination of characters (protohypsodont and pentalophodont cheek teeth, with the leading edges of similar thickness to the trailing edges, and presence of a groove on the bottom of the infraorbital foramen) not present in other known dinomyids, which led us to erect a new taxon. The abundant and diverse fossil record of protohypsodont dinomyids suggests that an important radiative event may have occurred during the middle–late Miocene of northern South America. http://zoobank.org/urn:lsid:zoobank.org:pub:E082C3C6-47B6-4D83-9009-A64879AAFC7A http://www.zoobank.org/NomenclaturalActs/16235A7B-A261-445E-8DD4-940AB21DCB06
Biology Letters | 2018
Rodrigo Temp Müller; Flávio Augusto Pretto; Leonardo Kerber; Eduardo Silva-Neves; Sérgio Dias-da-Silva
A recently published study [[1][1]] reassessed the phylogenetic relationships of Chilesaurus diegosuarezi , proposing its affinities to ornithischians rather than theropods as previously suggested [[2][2]]. However, we observed that the results presented by Baron & Barrett [[1][1]] could not be
Journal of Mammalian Evolution | 2017
Leonardo Kerber; Francisco Ricardo Negri; Ana Maria Ribeiro; Norma Nasif; Jonas P. De Souza-Filho; Jorge Ferigolo
Lethaia | 2017
Leonardo Kerber; Francisco Ricardo Negri; Jorge Ferigolo; Elver Luiz Mayer; Ana Maria Ribeiro
Terrae Didatica | 2018
Leonardo Kerber
Palaeogeography, Palaeoclimatology, Palaeoecology | 2018
Elver Luiz Mayer; Leonardo Kerber; Ana Maria Ribeiro; Alex Hubbe
Archive | 2018
Rodrigo Temp Müller; Flávio A. Pretto; Leonardo Kerber; Eduardo Silva-Neves; Sérgio Dias-da-Silva
Journal of South American Earth Sciences | 2018
Ane Elise Branco Pavanatto; Flávio Augusto Pretto; Leonardo Kerber; Rodrigo Temp Müller; Átila Augusto Stock Da-Rosa; Sérgio Dias-da-Silva