SABIIA - Sistema Aberto e Integrado de Informação em Agricultura (Sabiia)

Garassino, Alessandro; Pasini, Giovanni; Teruzzi, Giorgio.

Fossil decapods of the Lower Triassic marine strata of Madagascar are reviewed. These display affiliation to the dendrobranchiates. These include Antrimpos madagascariensis, two species of Ifasya (I. madagascariensis and I. straeleni) and Ambilobeia karojoi.

Triadobatrachus massinoti, the earliest known lissamphibian (Vertebrata: Tetrapoda) re-examined by μCT scan, and the evolution of trunk length in batrachians

Palavras-chave: Crustacea; Decapoda; Triassic; Madagascar.

Ano: 2003

URL: http://www.repository.naturalis.nl/record/534321

Ascarrunz, E.; Rage , J.-C.; Legreneur, P.; Laurin, M..

Triadobatrachus massinoti is a batrachian known from a single fossil from the Early Triassic of Madagascar that presents a combination of apomorphic salientian and plesiomorphic batrachian characters. Herein we offer a revised description of the specimen based on X-ray micro-tomography data. We report previously unknown caudal vertebrae, possible mentomeckelians, and hidden parts of other structures. We also confirm the presence of a ventrolateral ledge on the opisthotic, and we rectify some previous interpretations. There are no cervical ribs and the jaw may have had an angular. The presacral region is composed of 15 vertebrae with a unique atlas-axis complex instead of 14 vertebrae with a bipartite atlas. The configuration of the pelvic girdle is not...

First record of Coleia Broderip (Crustacea, Decapoda, Coleiidae) from the Upper Triassic of Japan

Palavras-chave: Anura; Caudopelvic apparatus; CT scan; Salientia; Triassic; Trunk evolution; 42.82.

Ano: 2016

URL: http://www.repository.naturalis.nl/record/610011

Karasawa, Hiroaki; Takahashi, Fumio; Doi, Eiji; Ishida, Hideo.

We record the discovery of Coleia Broderip (Eryonoidea: Coleiidae) from the Nakatsuka Formation, Mine Group, Upper Triassic of Japan. The specimens were collected from shales exposed at Tsubuta, Sanyo-cho (Yamaguchi Prefecture). Coleia co-occurs there with fragments of a penaeoid, bivalves, Halobia spp., ammonites, and plants.

Long bone histology and microanatomy of Placodontia (Diapsida: Sauropterygia)

Palavras-chave: Crustacea; Decapoda; Coleiidae; Coleia; Triassic; Japan.

Ano: 2003

URL: http://www.repository.naturalis.nl/record/534361

Klein, N.; Houssaye, A.; Neenan, J.M.; Scheyer, T.M..

Placodontia, an enigmatic group of durophagous and in part heavily armoured animals, were members of Sauropterygia, the most diverse and successful group of Mesozoic marine reptiles. Microanatomy and histology of long bones of several armoured and non-armoured Placodontia were studied, covering most of their taxonomic breadth, to elucidate the paleoecology, physiology, and lifestyle of its members. Results reveal an unexpected and not phylogenetically or stratigraphically related disparity of microanatomical and histological features for the group. The non-armoured Paraplacodus and the heavily armoured Psephoderma grew with lamellar-zonal bone tissue type, which is typical for modern sauropsids. In the former, the tissue is nearly avascular surrounding a...

Biomechanical comments about Triassic dinosaurs from Brazil

Palavras-chave: Bone mass increase; Bone tissue types; Extinct marine reptiles; High growth rates; PCA; Swimming capabilities; Triassic; 38.22.

Ano: 2015

URL: http://www.repository.naturalis.nl/record/521679

Pap. Avulsos de Zool. (São Paulo)

Delcourt,Rafael; Azevedo,Sergio Alex Kugland de; Grillo,Orlando Nelson; Deantoni,Fernanda Oliveira.

Triassic dinosaurs of Brazil are found in Santa Maria and Caturrita formations, Rio Grande do Sul state, Brazil. There are three species known from the Santa Maria Formation (Staurikosaurus pricei, Saturnalia tupiniquim and Pampadromaeus barberenai), and two from Caturrita Formation (Guaibasaurus candelariensis and Unaysaurus tolentinoi). These dinosaur materials are, for the most part, well preserved and allow for descriptions of musculature and biomechanical studies. The lateral rotation of the Saturnalia femur is corroborated through calculations of muscle moment arms. The enhanced supracetabular crest of Saturnalia, Guaibasaurus, Staurikosaurus, Herrerasaurus ischigualastensis, Efraasia minor and Chormogisaurus novasi suggests that basal dinosaurs may...

Miospores and chlorococcalean algae from the Los Rastros Formation, Middle to Upper Triassic of central-western Argentina

Palavras-chave: Dinosaurs; Triassic; Biomechanics; Articulation; Mass.

Ano: 2012

URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0031-10492012002900001

Ottone,Eduardo G.; Mancuso,Adriana C.; Resano,Magdalena.

Lacustrine strata of the Los Rastros Formation (Middle to Upper Triassic) at Río Gualo section (La Rioja province), yield a distinctive palynological assemblage of miospores and chlorococcalean algae. The miospore association is characterized by a relative abundance of corystosperm pollen grains with subordinate inaperturates, diploxylonoid disaccates, spores, monocolpates, monosaccates and striate pollen grains. The phytoplankton are mostly represented by Botryococcus but also by Plaesiodictyon , a form probably related to the Hydrodictyaceae. Geological data and variations in phytoplankton content indicate that the lacustrine system probably evolved from a stretcht of freshwater with eutrophic conditions, into a body with oligotrophic conditions through...

URL: http://www.scielo.org.ar/scielo.php?script=sci_arttext&pid=S0002-70142005000200007

Palavras-chave: Argentina; Triassic; Miospores and chlorococcalean algae; Systematics; Lacustrine environment.

Ano: 2005

The "New Approach to Corystospermales" and the Antarctic Fossil Record: A Critique

Axsmith,Brian J.; Taylor,Edith L.; Taylor,Thomas N..

Much is now known about the Mesozoic pteridosperm order Corystospermales based on over seventy years of research. However, several concepts of corystosperm evolution have been proposed that avoid well-established phylogenetic methodology and arbitrarily discount evidence of the group from Antarctica. Here, we focus on the "New approach to Corystospermales" published by Artabe and Brea, which establishes a phylogeny for corystosperms based mainly on a restricted concept of anomalous wood anatomy in this group, and assumed relationships with cycads and medullosan pteridosperms. These authors also question evidence regarding attached corystospermalean organs from Antarctica. Based on a reconsideration of the Antarctic record, we reaffirm the evidence for a...

URL: http://www.scielo.org.ar/scielo.php?script=sci_arttext&pid=S0002-70142007000100017

Palavras-chave: Antarctica; Corystospermales; Dicroidium; Gondwana; Phylogeny; South America; Triassic; Seed ferns.

Ano: 2007

The Triassic insect fauna from Argentina: Blattoptera and Coleoptera from the Ischichuca Formation (Bermejo Basin), La Rioja Province

Neto,Rafael Gioia Martins; Gallego,Oscar Florencio.

Fossil insect taxa from the Ischichuca Formation (late Middle Triassic to early Late Triassic), La Rioja Province (Argentina) are described. One new genus and six new species are proposed: Hermosablatta pygmaea sp. nov. (Blattoptera, Mancusoblattidae), Ademosyne umutu sp. nov., Ischichucasyne cladocosta sp. nov. (Coleoptera, Permosynidae), Argentinosyne ischichucaensis sp. nov. (Coleoptera, Schizocoleidae), Babuskaya elaterata gen. et sp. nov. (Coleoptera, Elateridae?) and Argentinocupes sara sp. nov. (Coleoptera, Cupedidae?). Other previously described Triassic insect species, such as Ademosyne punctuada Martins-Neto and Gallego, Argentinosyne frenguellii Martins-Neto and Gallego, and Argentinocupes pulcher Martins-Neto and Gallego are reported for the...

URL: http://www.scielo.org.ar/scielo.php?script=sci_arttext&pid=S0002-70142009000200012

Palavras-chave: Blattoptera; Coleoptera; Ischichuca Formation; Triassic; Argentina.

Ano: 2009

Analysis by Fourier transform infrared spectroscopy of Johnstonia (Corystospermales, Corystospermaceae) cuticles and compressions from the Triassic of Cacheuta, Mendoza, Argentina

D`angelo,José Alejandro.

Spectroscopic information (functional groups and semi-quantitative data) of corystosperm cuticles and compressions from the Triassic of Cacheuta, Mendoza, Argentina, is reported for the first time. Fossil leaves of Johnstonia spp. (Corystospermales, Corystospermaceae) were analyzed by Fourier transform infrared spectroscopy (FT-IR) in an attempt to identify spectroscopic patterns that would characterize these taxa. Infrared spectra obtained from cuticles and compressions of Johnstonia spp. showed a relatively rich aliphatic structure as well as hydroxyl, carbonyl and some other oxygen-containing functional groups. Semi-quantitative data derived from FT-IR spectra were statistically analyzed using one-way analysis of variance test (ANOVA). In the three taxa...

URL: http://www.scielo.org.ar/scielo.php?script=sci_arttext&pid=S0002-70142006000400003

Palavras-chave: Corystosperm cuticles; Johnstonia; FT-IR spectroscopy; Triassic; Cacheuta; Argentina.

Ano: 2006

The Triassic insect fauna from the Los Rastros Formation (Bermejo Basin), La Rioja Province (Argentina): its context, taphonomy and paleobiology

Mancuso,Adriana C.; Gallego,Oscar F.; Martins-Neto,Rafael G..

In the Bermejo Basin, the Los Rastros Formation bears an abundant insect fauna, mainly of terrestrial winged adult organisms related to the Blattoptera and the Coleoptera orders. The insect remains are found in the black shales of the offshore lacustrine facies and their taphonomic features suggest that the specimens were allochthonous to the lake. The individuals appear to arrived alive to the lake and had a rapid fall trough the water column, thus, they are preserved intact. In contrast, some of them may have suffered fragmentation in air traspontation and/or biological attack during long periods of flotation.

URL: http://www.scielo.org.ar/scielo.php?script=sci_arttext&pid=S0002-70142007000200006

Palavras-chave: Triassic; Insecta; Taphonomy; Los Rastros Formation; Argentina.

Ano: 2007

A new prozostrodontian cynodont (Therapsida) from the Late Triassic Riograndia Assemblage Zone (Santa Maria Supersequence) of Southern Brazil

Anais da ABC (AABC)

SOARES,MARINA B.; MARTINELLI,AGUSTÍN G.; OLIVEIRA,TÉO V. DE.

We report here on a new prozostrodontian cynodont, Botucaraitherium belarminoigen. et sp. nov., from the Late Triassic RiograndiaAssemblage Zone (AZ) of the Candelária Sequence (Santa Maria Supersequence), collected in the Botucaraí Hill Site, Candelária Municipality, state of Rio Grande do Sul, Brazil. The new taxon is based on a single specimen (holotype MMACR-PV-003-T) which includes the left lower jaw, without postdentary bones, bearing the root of the last incisor, canine and four postcanines plus one partial crown inside the dentary, not erupted, and two maxillary fragments, one with a broken canine and another with one postcanine. The features of the lower jaw and lower/upper postcanines resemble those of the prozostrodontians Prozostrodon...

Mesozoic dinosaurs from Brazil and their biogeographic implications

Palavras-chave: Cynodontia; Prozostrodontia; Santa Maria Supersequence; Triassic.

Ano: 2014

URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652014000401673

Anais da ABC (AABC)

Bittencourt,Jonathas S.; Langer,Max C..

The record of dinosaur body-fossils in the Brazilian Mesozoic is restricted to the Triassic of Rio Grande do Sul and Cretaceous of various parts of the country. This includes 21 named species, two of which were regarded as nomina dubia, and 19 consensually assigned to Dinosauria. Additional eight supraspecific taxa have been identified based on fragmentary specimens and numerous dinosaur footprints known in Brazil. In fact, most Brazilian specimens related to dinosaurs are composed of isolated teeth and vertebrae. Despite the increase of fieldwork during the last decade, there are still no dinosaur body-fossils of Jurassic age and the evidence of ornithischians in Brazil is very limited. Dinosaur faunas from this country are generally correlated with those...