scholarly journals New information on two Late Cretaceous (Turonian) fishes from Lac des Bois, Northwest Territories, Canada

2015 ◽  
Vol 1 ◽  
pp. 23 ◽  
Author(s):  
Alison M Murray ◽  
Stephen L Cumbaa
Keyword(s):  
Northwest Territories ◽  
Late Cretaceous ◽  
New Information ◽  
New Material

Fishes from Turonian deposits at Lac des Bois, Northwest Territories, Canada, have previously been described based on material from calcareous mudstone concretions collected in 1969. A more recent collecting trip to the locality in 2010 led to the discovery of fossil fishes in a shale layer. These fishes, preserved in a different manner from the earlier collections, provide new information and allow reinterpretations on two previously described fishes, Aquilopiscis wilsoni (Pachyrhizodontidae) and Avitosmerus canadensis (Euteleostei). Although the new material allows a better understanding of these two fishes, it does not change our ideas about their relationships. Avitosmerus canadensis remains in the Euteleostei with relationships uncertain, and Aquilopiscis wilsoni is confirmed as a member of the Pachyrhizodontidae.

A review of Leidyosuchus canadensis Lambe, 1907 (Archosauria: Crocodylia) and an assessment of cranial variation based upon new material

2001 ◽  
Vol 38 (12) ◽  
pp. 1665-1687 ◽  
Author(s):  
Xiao-Chun Wu ◽  
Anthony P Russell ◽  
Donald B Brinkman
Keyword(s):  
North America ◽  
Late Cretaceous ◽  
Individual Variation ◽  
The Other ◽  
Cranial Morphology ◽  
Cranial Variation ◽  
New Information ◽  
New Material ◽  
Incisive Foramen ◽  
Two Stages

Cranial morphology of Leidyosuchus canadensis Lambe 1907 is reviewed based on previously undescribed material—seven skulls and eight mandibles. This species can be distinctively diagnosed by more than 10 derived features. New information supports the contention that L. canadensis is the sole representative of Leidyosuchus, and indicates that it is very different from the other species previously assigned to this taxon. The membership of L. canadensis within Alligatoroidea is also demonstrated by new information revealed in this study. Ontogenetic and individual variation in the cranial anatomy of L. canadensis are documented. The contact of the premaxillary–maxillary suture with the incisive foramen is not diagnostic of the taxon; rather, it exhibits individual variation. Leidyosuchus is endemic to North America. There was no faunal interchange of crocodyliforms between North America and central Asia during the last two stages of the Late Cretaceous.

scholarly journals A new small deinonychosaur (Dinosauria: Theropoda) from the Late Cretaceous of Patagônia, Argentina

2011 ◽  
Vol 83 (1) ◽  
pp. 109-116 ◽  
Author(s):  
Juan D. Porfiri ◽  
Jorge O. Calvo ◽  
Domenica dos Santos
Keyword(s):  
Late Cretaceous ◽  
Taxonomic Diversity ◽  
South American ◽  
New Material ◽  
New Evidence

Here we report on a new small deinonychosaurian theropod, Pamparaptor micros gen. et sp. nov., from the Late Cretaceous of Patagônia, Argentina. Pamparaptor micros exhibits a pedal structure previously unknown among South Américan deinonychosaurians. The new material provides new evidence about the morphology and taxonomic diversity of Patagônian deinonychosaurs. Pamparaptor is the smaller non-avialae Patagônian deinonychosaur, probably with about 0.50-0.70 meters, long. The pedal construction resembles, that of Troodontid or basal Dromaeosaurids. Nevertheless, up to now, we considered Pamparaptor a peculiar Patagônian Dromaeosaurid with troodontid-like pes.

Additional information on Alainaspis and Boothiaspis, cyathaspidids (Agnatha: Heterostraci) from the Upper Silurian of Northwest Territories, Canada

1991 ◽  
Vol 65 (2) ◽  
pp. 308-313 ◽  
Author(s):  
David K. Elliott ◽  
David L. Dineley
Keyword(s):  
Northwest Territories ◽  
Related Species ◽  
Posterior Margin ◽  
Dorsal Shield ◽  
Filter Feeder ◽  
Closely Related Species ◽  
Additional Information ◽  
New Material ◽  
Upper Silurian ◽  
Original Interpretation

New material of the poraspid Alainaspis platyrhina Elliott and Dineley has made it possible to provide a more extensive reconstruction of this animal. It is now clear that an elongated branchial opening was present below the lateral lamina and that a well-developed post-branchial lobe was present. No branchial plate has been identified and this may have been fused to the dorsal shield, forming the ventral lamina. The lateral lamina is now seen to terminate in a rounded angle before the posterior margin of the shield. Several ventral shields with similar ornament are identified as belonging to A. platyrhina. These are broad and deep and are consistent with the original interpretation of this animal as a filter feeder. One similar shield with a coarser ornament is tentatively assigned to the closely related species Boothiaspis ovata Broad.

scholarly journals The firstCaipirasuchus(Mesoeucrocodylia, Notosuchia) from the Late Cretaceous of Minas Gerais, Brazil: new insights on sphagesaurid anatomy and taxonomy

PeerJ ◽  
2018 ◽  
Vol 6 ◽  
pp. e5594 ◽  
Author(s):  
Agustín G. Martinelli ◽  
Thiago S. Marinho ◽  
Fabiano V. Iori ◽  
Luiz Carlos B. Ribeiro
Keyword(s):  
New Species ◽  
Late Cretaceous ◽  
Field Work ◽  
Lower Portion ◽  
Main Subject ◽  
Vertebrate Fauna ◽  
Paulo State ◽  
New Material ◽  
Fish Remains ◽  
A New Species

Field work conducted by the staff of the Centro de Pesquisas Paleontológicas Llewellyn Ivor Price of the Universidade Federal do Triângulo Mineiro since 2009 at Campina Verde municipality (MG) have resulted in the discovery of a diverse vertebrate fauna from the Adamantina Formation (Bauru Basin). The baurusuchidCampinasuchus diniziwas described in 2011 from Fazenda Três Antas site and after that, preliminary descriptions of a partial crocodyliform egg, abelisaurid teeth, and fish remains have been done. Recently, the fossil sample has been considerably increased including the discovery of several, partially articulated fish remains referred to Lepisosteiformes and an almost complete and articulated skeleton referred to a new species ofCaipirasuchus(Notosuchia, Sphagesauridae), which is the main subject of this contribution. At present, this genus was restricted to the Adamantina Formation cropping out in São Paulo state, with the speciesCaipirasuchus montealtensis,Caipirasuchus paulistanus, andCaipirasuchus stenognathus. The new material represents the holotype of a new species,Caipirasuchus mineirusn. sp., diferenciated from the previously ones due to the following traits: last two maxillary teeth located posterior to anterior edge of infraorbital fenestra, elongated lateroventral maxillo-jugal suture—about ½ the anteroposterior maxillar length—and contact between posterior crest of quadrate and posterior end of squamosal forming an almost 90° flaring roof of the squamosal, among others.C. mineiruswas found in the same outcrop thanCampinasuchusbut stratigraphically the former occurs in the lower portion of the section with no unambiguous data supporting the coexistance of both taxa.

scholarly journals New information on the Cretaceous sauropod dinosaurs of Zhejiang Province, China: impact on Laurasian titanosauriform phylogeny and biogeography

2019 ◽  
Vol 6 (8) ◽  
pp. 191057 ◽  
Author(s):  
Philip D. Mannion ◽  
Paul Upchurch ◽  
Xingsheng Jin ◽  
Wenjie Zheng
Keyword(s):  
Southern Hemisphere ◽  
Early Cretaceous ◽  
Late Cretaceous ◽  
East Asian ◽  
Zhejiang Province ◽  
Data Matrix ◽  
New Information ◽  
Anatomical Information ◽  
Globally Distributed ◽  
Early Late

Titanosaurs were a globally distributed clade of Cretaceous sauropods. Historically regarded as a primarily Gondwanan radiation, there is a growing number of Eurasian taxa, with several putative titanosaurs contemporaneous with, or even pre-dating, the oldest known Southern Hemisphere remains. The early Late Cretaceous Jinhua Formation, in Zhejiang Province, China, has yielded two putative titanosaurs, Jiangshanosaurus lixianensis and Dongyangosaurus sinensis . Here, we provide a detailed re-description and diagnosis of Jiangshanosaurus , as well as new anatomical information on Dongyangosaurus . Previously, a ‘derived’ titanosaurian placement for Jiangshanosaurus was primarily based on the presence of procoelous anterior caudal centra. We show that this taxon had amphicoelous anterior-middle caudal centra. Its only titanosaurian synapomorphy is that the dorsal margins of the scapula and coracoid are approximately level with one another. Dongyangosaurus can clearly be differentiated from Jiangshanosaurus , and displays features that indicate a closer relationship to the titanosaur radiation. Revised scores for both taxa are incorporated into an expanded phylogenetic data matrix, comprising 124 taxa scored for 548 characters. Under equal weights parsimony, Jiangshanosaurus is recovered as a member of the non-titanosaurian East Asian somphospondylan clade Euhelopodidae, and Dongyangosaurus lies just outside of Titanosauria. However, when extended implied weighting is applied, both taxa are placed within Titanosauria. Most other ‘middle’ Cretaceous East Asian sauropods are probably non-titanosaurian somphospondylans, but at least Xianshanosaurus appears to belong to the titanosaur radiation. Our analyses also recover the Early Cretaceous European sauropod Normanniasaurus genceyi as a ‘derived’ titanosaur, clustering with Gondwanan taxa. These results provide further support for a widespread diversification of titanosaurs by at least the Early Cretaceous.

scholarly journals The debated question of asymmetrical rhynchonellids (Brachiopoda, Rhynchonellida): examples from the Late Cretaceous of Western Europe

2020 ◽  
Vol 191 ◽  
pp. 1
Author(s):  
Danièle Gaspard ◽  
Sylvain Charbonnier
Keyword(s):  
New Species ◽  
Late Cretaceous ◽  
Western Europe ◽  
Anterior Margin ◽  
Morphological Diversity ◽  
New Genera ◽  
New Material ◽  
A New Species ◽  
Se France ◽  
Sw France

Many Cretaceous asymmetrical rhynchonellid brachiopods (Brachiopoda, Rhynchonellida) have long been considered as Rhynchonella difformis (Valenciennes in Lamarck, 1819). After a revision, Owen (1962) included the Cenomanian specimens from Europe in Cyclothyris M’Coy, 1844. Later, Manceñido et al. (2002) confirmed this decision and critically mentioned the name of another asymmetrical rhynchonellid genus from Spain, Owenirhynchia Calzada in Calzada and Pocovi, 1980. Specimens with an asymmetrical anterior margin (non particularly ecophenotypical), from the Late Coniacian and the Santonian of Les Corbières (Aude, France) and Basse-Provence (SE France) are here compared to specimens of the original Cenomanian species C. difformis. They are also compared to new material from the Northern Castilian Platform (Coniacian-Santonian, N Spain) and to Rhynchonella globata Arnaud, 1877 (Campanian, Les Charentes, Dordogne, SW France) and Rh. vesicularis Coquand, 1860 (Campanian, Charente, SW France). These observations document the great morphological diversity among all these species and lead us to erect a new species: Cyclothyris grimargina nov. sp. from the type material of Arnaud, and two new genera: Contortithyris nov. gen. including Contortithyris thermae nov. sp., Beaussetithyris nov. gen. including Beaussetithyris asymmetrica nov. sp. All of these brachiopods fundamentally present an asymmetrical state which origin is discussed.

Crete (Prehistoric)

2013 ◽  
Vol 59 ◽  
pp. 56-67
Author(s):  
John Bennet
Keyword(s):  
The Past ◽  
New Information ◽  
Archaeological Work ◽  
New Material ◽  
Individual Contributions ◽  
The University

Publications of fieldwork continue to appear slowly, but the latest volume of ADelt for Crete, covering the years 2001–2004, appeared in print in summer 2012 (ADelt 56–59 [2001–2004] B5). Inevitably, given the years covered, some of the activity summarized in this volume has already been noted in AG and brief notices of some appears in the decadal summary of the activities of all the prehistoric and Classical ephorias (www.yppo.gr/0/anaskafes; AR 58 [2011–2012] 58). Emphasis here is on those activities not already noted in AG or those where significant new information appears in the new volume of ADelt. The second meeting on Archaeological Work on Crete (AWiC2), alluded to last year (AR 58 [2011–2012] 58), has been published and can be read online through the University of Crete's Library (http://elocus.lib.uoc.gr/dlib/d/0/5/metadata-dlib-1368695830-557833-31681.tkl#). A third meeting is scheduled for December 2013 and will hopefully be made accessible with equally commendable promptness. The proceedings of the Tenth International Cretological Congress held in Chania in 2006 (see AR 53 [2006–2007] 96) are still to appear in print, although e-offprints of individual contributions continue to circulate. New material in this year's entry is therefore drawn primarily from ADelt 56–59 (2001–2004) B5 and AWiC2.The past year has seen a number of significant publications on prehistoric Crete, including the proceedings of several conferences. The publication by the BSA of Intermezzo: Intermediacy and Regeneration in Middle Minoan III Palatial Crete (Macdonald and Knappett [2013]), containing papers presented at a workshop held in 2008, complements volumes noted last year (AR 58 [2011–2012] 58) on Late Minoan IB ceramics (Brogan and Hallager [2011]) and on the Prepalatial and Protopalatial periods (Early Minoan to Middle Minoan II) (Schoep et al. [2011]).

Morphology, anatomy, phylogenetics and distribution of fossil and extant Trochodendraceae in the Northern Hemisphere

2020 ◽  
Author(s):  
Steven R Manchester ◽  
Zlatko Kvaček ◽  
Walter S Judd
Keyword(s):  
Northern Hemisphere ◽  
Late Cretaceous ◽  
Morphological Characters ◽  
Basal Part ◽  
Parsimony Analysis ◽  
Crown Group ◽  
Modern Species ◽  
The Family ◽  
New Material ◽  
Fossil Fruit

Abstract We present the oldest known occurrences of crown-group Trochodendraceae based on new material from the Palaeocene of Wyoming, USA. Two genera are recognized, Trochodendron and Eotrochion gen. nov. The fossil fruit of Trochodendron infernense sp. nov. is represented by a pedicellate, apically dehiscent capsular fruit composed of nine follicle-like units, each bearing a persistent convex style. The basal part is ornamented with numerous raised stamen scars. From the same deposits, Eotrochion is represented by infructescences, fruits and associated leaves. The infructescences are racemes of numerous apically dehiscent capsules, each with c. 14–16 styles, each with an underlying nectary and receptacles lacking stamen scars, but possessing a prominent perianth scar. A phylogenetic assessment of the modern species, plus representatives of four extinct genera of fossil Trochodendraceae based on available morphological characters, yields a favoured topology of Trochodendron(Eotrochion(Concavistylon kvacekii(C. wehrii (Pentacentron, Tetracentron)))). A parsimony analysis of currently available characters indicates that C. wehrii renders Concavistylon non-monophyletic. Accordingly, we transfer it to Paraconcavistylon gen. nov., characterized by pendent, rather than erect infructescences. We also reconsider the extinct Nordenskioeldia (Late Cretaceous to Miocene), the prior placement of which in Trochodendraceae has been challenged, and we consider it to fall outside the crown group of the family.

scholarly journals New Material of Beelzebufo, a Hyperossified Frog (Amphibia: Anura) from the Late Cretaceous of Madagascar

PLoS ONE ◽  
2014 ◽  
Vol 9 (1) ◽  
pp. e87236 ◽  
Author(s):  
Susan E. Evans ◽  
Joseph R. Groenke ◽  
Marc E. H. Jones ◽  
Alan H. Turner ◽  
David W. Krause
Keyword(s):  
Late Cretaceous ◽  
New Material

Anatomy of the primitive bird Sapeornis chaoyangensis from the Early Cretaceous of Liaoning, China

2003 ◽  
Vol 40 (5) ◽  
pp. 731-747 ◽  
Author(s):  
Zhonghe Zhou ◽  
Fucheng Zhang
Keyword(s):  
Hind Limb ◽  
Feeding Habit ◽  
Pectoral Girdle ◽  
Mosaic Pattern ◽  
Avian Evolution ◽  
New Information ◽  
New Material ◽  
Evolution Of Birds ◽  
Phalangeal Formula ◽  
Basal Position

Two new, nearly completely articulated skeletons of Sapeornis chaoyangensis provide much new information about the anatomy of this basal avian, particularly in the skull, pectoral girdle, forelimb, and hind limb. This new material shows that the hand of Sapeornis, with a phalangeal formula of "2–3–2," was more derived than previously reconstructed. The skeleton of Sapeornis has several unique features, such as a distinctively elongated fenestra on the proximal end of the humerus, a robust furcula with a distinctive hypocleidum, and an elongated forelimb. Sapeornis exhibits a combination of derived and primitive features, including a short, robust non-strut-like coracoid and a fibula reaching the distal end of the tarsal joint (as in Archaeopteryx), a pygostyle, reduced manual digits, and a well-fused carpometacarpus (as in more advanced birds). These features further indicate the mosaic pattern in the early evolution of birds and confirm the basal position of Sapeornis near Archaeopteryx and Jeholornic in the phylogeny of early birds. The preservation of gastroliths in one of the new specimens also represents the first Chinese Mesozoic bird with such evidence, indicating a herbivorous feeding habit and providing further evidence for our understanding of the diet diversification in early avian evolution.

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