First record of Metzgeriinean bryophyte Pantiathallites gondwanensis gen. et sp. nov. in the Glossopteris floral assemblage of late early Permian of India

2013 ◽  
Vol 84 (3) ◽  
pp. 447-455 ◽  
Author(s):  
Manju Banerjee ◽  
Sutapa Dutta
Keyword(s):  
First Record ◽  
Early Permian ◽  
Floral Assemblage

First record of Seymouria (Vertebrata: Seymouriamorpha) from Early Permian fissure fills at Richards Spur, Oklahoma

1999 ◽  
Vol 36 (8) ◽  
pp. 1257-1266 ◽  
Author(s):  
Corwin Sullivan ◽  
Robert R Reisz
Keyword(s):  
United States ◽  
North America ◽  
First Record ◽  
The Other ◽  
Early Developmental Stage ◽  
Regular Component ◽  
Early Permian ◽  
Skeletal Morphology ◽  
Mode Of Life ◽  
Early Developmental

Isolated skeletal elements of the amphibian genus Seymouria were recently discovered at the Richards Spur locality near Fort Sill, Oklahoma, a prolific source of Early Permian tetrapod remains. Five of the seven described bones are of juvenile size and include three neural arches, a humerus, and a femur, whereas the other two are partial vertebrae, apparently adult. All seven are morphologically similar to equivalent skeletal elements in Seymouria specimens previously collected in Europe and North America, apart from features reflecting the early developmental stage of the juvenile bones. The femur and humerus are clearly distinct from those of other seymouriamorphs such as Ariekanerpeton and Kotlassia. The rarity of Seymouria at the Richards Spur locality implies that it was not a regular component of the fauna, and it is also associated with the less markedly terrestrial assemblage that consistently occurs at localities in the southwestern United States. However, its skeletal morphology and occurrence at terrestrial localities such as Richards Spur imply a primarily terrestrial, rather than an amphibious, mode of life. Conflicting biostratigraphic correlations imply that the exact age of the Richards Spur deposits is uncertain, and equivalence to the Arroyo Formation of Texas may be erroneous.

scholarly journals First record of catacrinid crinoid from the Lower Permian of Spitsbergen

2013 ◽  
Vol 34 (2) ◽  
pp. 139-150 ◽  
Author(s):  
Przemysław Gorzelak ◽  
Błażej Błażejowski ◽  
Alfred Uchman ◽  
Nils−Martin Hanken
Keyword(s):  
First Record ◽  
Lower Permian ◽  
Early Permian ◽  
Considerable Part ◽  
Generic Level ◽  
Degree Of Certainty ◽  
First Time

AbstractAn early Permian (late Artinskian-Roadian) cladid crinoid (Catacrinidae gen. et sp. indet.) is reported for the first time from the Vøringen Member of the Kapp Starostin Formation of Spitsbergen. The specimen is partly articulated and preserves a considerable part of its stalk and a complete cup, but only the proximal portions of its arms. Thus, it can− not be identified with any degree of certainty at the generic level. Despite this, our finding is important as it constitutes one of the youngest records of catacrinid crinoids to date and con− siderably extends the palaeogeographic distribution of this group.

A new species of Dimetrodon (Synapsida: Sphenacodontidae) from the Lower Permian of Germany records first occurrence of genus outside of North America

2001 ◽  
Vol 38 (5) ◽  
pp. 803-812 ◽  
Author(s):  
David S Berman ◽  
Robert R Reisz ◽  
Thomas Martens ◽  
Amy C Henrici
Keyword(s):  
New Species ◽  
North America ◽  
Vertebral Column ◽  
First Record ◽  
Lower Permian ◽  
Early Permian ◽  
Terrestrial Vertebrates ◽  
First Occurrence ◽  
Large Predators ◽  
A New Species

A new species of the sphenacodontid synapsid Dimetrodon, D. teutonis, is described on the basis of a single, adult specimen consisting of a large portion of the presacral vertebral column. The holotype was collected from the Lower Permian Tambach Formation, lowermost formational unit of the Upper Rotliegend, of the Bromacker quarry locality in the midregion of the Thuringian Forest near Gotha, central Germany. This is the first record of the genus outside of North America and, therefore, provides not only additional biological evidence of a continuous Euramerican landmass during the Early Permian, but also the absence of any major physical or biological barrier to faunal interchange of terrestrial vertebrates. An estimated weight of 14 kg for D. teutonis is half that of the smallest, previously recognized species, D. natalis. Sphenacodontid phylogeny indicates that the diminutive size of D. teutonis represents an autapomorphy and is in general accord with the absence of large-sized, basal synapsid predators at this truly terrestrial upland locality. It is speculated that the diminutive size of D. teutonis was probably an adaptation to a truly terrestrial, relatively uplands existence like that represented by the Bromacker locality. Here it subsisted on small vertebrates (and possibly large invertebrates) of the Bromacker assemblage, in which the dominant members in both size and abundance were herbivorous diadectids, and it was unlikely to encounter large predators.

scholarly journals Palynofacies patterns of the Highveld coal deposits (Karoo Basin, South Africa): Clues to reconstruction of palaeoenvironment and palaeoclimate

2016 ◽  
Vol 56 (1) ◽  
pp. 3-15 ◽  
Author(s):  
Alexander Wheeler ◽  
Annette E. Götz
Keyword(s):  
Coal Seam ◽  
Depositional Environment ◽  
Vegetation Patterns ◽  
Early Permian ◽  
Plant Debris ◽  
Delta Plain ◽  
Karoo Basin ◽  
Local Environments ◽  
Coal Deposits ◽  
Floral Assemblage

Abstract The early Permian represents a crucial period of climate change in Gondwana. This climate signature is captured in the palynological record that represents the floral assemblage of the region. Palynofacies analysis of the No. 2 Coal Seam of the Highveld Coalfield provides a high-resolution picture of this climatic shift, as well as detailing the vegetation patterns and local environments. Core samples taken from two localities were studied with respect to the characteristics of the plant debris and the palynomorph assemblages to differentiate between regional and local signatures. At both of the sampling localities, the No. 2 Coal Seam is split into a Lower Coal Seam and an Upper Coal Seam by a siltstone and a sandstone intraseam parting, respectively. The uneven palaeotopography and distal depositional environment of the Highveld Coalfield distinguish it from the northern Witbank Coalfield as a river-dominated delta plain, with differences in the palaeoenvironment at each locality. Results from the Lower Coal Seam indicate a fern-dominated lowland and conifer-dominated upland. This gives way to a Glossopteris-dominated lowland and a diverse gymnospermous assemblage in the upland of the Upper Coal Seam. This change in floral composition is also observed in the adjacent Witbank Coalfield and is likely caused by climate amelioration related to the movement of Gondwana away from the South Pole.

Spore tetrads, possible indicators of intense climatic regimes: case study from an early Permian stratum of Singrauli Coalfield, Son-Mahanadi Basin, India

2015 ◽  
Vol 153 (3) ◽  
pp. 426-437 ◽  
Author(s):  
ANJU SAXENA ◽  
KAMAL JEET SINGH ◽  
SRIKANTA MURTHY ◽  
SHAILA CHANDRA ◽  
SHREERUP GOSWAMI
Keyword(s):  
Central India ◽  
First Record ◽  
Climatic Conditions ◽  
Early Permian ◽  
Factors Affecting ◽  
Plant Parts ◽  
Ph Values ◽  
Mahanadi Basin ◽  
Biochemical Analyses ◽  
The Individual

AbstractA large number of naked, fossil spore tetrads assignable to the dispersed microspore genera Indotriradites, Microbaculispora and Microfoveolatispora are reported for the first time from an early Permian stratum (Lower Barakar Formation) of Singrauli Coalfield, Son-Mahanadi Basin, Central India. This is also the first record of tetrads from any Artinskian strata in the world. There is no evidence of any kind of sporangia or related plant parts in the present investigation that could ascertain the affinity of these tetrads; however, the presence of a trilete mark in the spores of the tetrads demonstrates their alliance at least with the pteridophyte group. The present study suggests possible factors affecting the sporogenesis process in the past, considering other available global records pertaining to fossil spore tetrads. The results of significant physiological and biochemical analyses performed on the anthers of modern plants related to reproductive biology, in order to understand the conditions and changes responsible for the formation of tetrads, are also considered. We analysed the globally occurring fossil tetrads and the palaeoclimates prevailing during their deposition. A correlation between extreme climatic conditions, specific pH values inside microsporangium and the formation of tetrad is envisaged. It is deduced that extreme climatic conditions (extreme cold/extreme hot) might have triggered some sort of malfunctioning in the sporogenesis process that altered the specific pH values inside the microsporangium. Any restraint of the activity of the callase enzyme, responsible for dissolution of callose walls laid between the individual spores, may therefore have apprehended the dissociation of tetrads into individual spores.

First record of plicidentine in Synapsida and patterns of tooth root shape change in Early Permian sphenacodontians

2014 ◽  
Vol 101 (11) ◽  
pp. 883-892 ◽  
Author(s):  
Kirstin S. Brink ◽  
Aaron R. H. LeBlanc ◽  
Robert R. Reisz
Keyword(s):  
Shape Change ◽  
First Record ◽  
Tooth Root ◽  
Early Permian

A new vertebrate Lagerstätte from the Lower Permian of France (Franchesse, Massif Central): palaeoenvironmental implications for the Bourbon-l'Archambault basin

2012 ◽  
Vol 183 (6) ◽  
pp. 509-515 ◽  
Author(s):  
J.-Sébastien Steyer ◽  
Sophie Sanchez ◽  
Pierre J. Debriette ◽  
Andrea M.F. Valli ◽  
François Escuille ◽  
...  
Keyword(s):  
Geographical Distribution ◽  
Aquatic Environment ◽  
First Record ◽  
Mass Mortality ◽  
Lower Permian ◽  
Early Permian ◽  
Massif Central

Abstract A new vertebrate locality from the Lower Permian (Cisuralian) of the Bourbon-l'Archambault basin (Massif Central, France) is reported and its associated flora and fauna preliminarily described. This locality corresponds to a mass mortality assemblage deposited in an aquatic environment. Interestingly, it has yielded hundreds of exceptionally well preserved seymouriamorph specimens, all referred to Discosauriscus austriacus. This exquisite assemblage corresponds to the first seymouriamorph Lagerstätte and the first record of D. austriacus outside the Boskovice basin in Czechia. It enlarges the geographical distribution of the species during the Early Permian, and has new palaeoenvironmental implications regarding the Palaeozoic Bourbon-l'Archambault basin.

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