scholarly journals The anatomy and relationships of Eucamerotus foxi (Dinosauria, Sauropoda) from the Early Cretaceous of England

2017 ◽  
Author(s):  
Amy Campbell ◽  
Paul Upchurch ◽  
Phillip D Mannion
Keyword(s):  
Phylogenetic Analysis ◽  
Early Cretaceous ◽  
Valid Species ◽  
Neural Arch ◽  
Isle Of Wight

Eucamerotus foxi is a macronarian sauropod from the Wessex Formation (Early Cretaceous, Barremian) of the Isle of Wight. It is represented by NHMUK R2522, a partial dorsal neural arch, and differs from other known sauropods by the presence of a stout robust prezygoparapophyseal lamina (PRPL) which bifurcates distally. NHMUK R90 are a pair of dorsal vertebrae also from the Wessex Formation which have been designated as paratypes of E. foxi. Both NHMUK R2522 and NHMUK R90 have traditionally been regarded as either basal titanosauriformes or of brachiosaurid affinities. Here, phylogenetic analysis using the Lusotitan Standard Discrete Matrix recovered NHMUK R90 as a non-titanosaurian somphospondylan nested in a clade made up of ((Tastavinsaurus (Chubutisaurus, Angolatitan, NHMUK R90)) though Bremer support for this group was low. Analyses recovered E. foxi as a neosauropod of uncertain affinities with little resolution throughout the tree. NHMUK R90 is recognised as being distinct from E. foxi based on the lack of a robust distally bifurcated PRPL and is likely representative of a new sauropod taxon. E. foxi is here retained as a valid species of basal macronarian.

scholarly journals The anatomy and relationships of Eucamerotus foxi (Dinosauria, Sauropoda) from the Early Cretaceous of England

2017 ◽  
Author(s):  
Amy Campbell ◽  
Paul Upchurch ◽  
Phillip D Mannion
Keyword(s):  
Phylogenetic Analysis ◽  
Early Cretaceous ◽  
Valid Species ◽  
Neural Arch ◽  
Isle Of Wight

Eucamerotus foxi is a macronarian sauropod from the Wessex Formation (Early Cretaceous, Barremian) of the Isle of Wight. It is represented by NHMUK R2522, a partial dorsal neural arch, and differs from other known sauropods by the presence of a stout robust prezygoparapophyseal lamina (PRPL) which bifurcates distally. NHMUK R90 are a pair of dorsal vertebrae also from the Wessex Formation which have been designated as paratypes of E. foxi. Both NHMUK R2522 and NHMUK R90 have traditionally been regarded as either basal titanosauriformes or of brachiosaurid affinities. Here, phylogenetic analysis using the Lusotitan Standard Discrete Matrix recovered NHMUK R90 as a non-titanosaurian somphospondylan nested in a clade made up of ((Tastavinsaurus (Chubutisaurus, Angolatitan, NHMUK R90)) though Bremer support for this group was low. Analyses recovered E. foxi as a neosauropod of uncertain affinities with little resolution throughout the tree. NHMUK R90 is recognised as being distinct from E. foxi based on the lack of a robust distally bifurcated PRPL and is likely representative of a new sauropod taxon. E. foxi is here retained as a valid species of basal macronarian.

Systematic revision of Sarcosuchus hartti (Crocodyliformes) from the Recôncavo Basin (Early Cretaceous) of Bahia, north-eastern Brazil

2019 ◽  
Author(s):  
Rafael G Souza ◽  
Rodrigo G Figueiredo ◽  
Sérgio A K Azevedo ◽  
Douglas Riff ◽  
Alexander W A Kellner
Keyword(s):  
Phylogenetic Analysis ◽  
Early Cretaceous ◽  
Coastal Areas ◽  
The State ◽  
Evolutionary Origin ◽  
Valid Species ◽  
Top Predator ◽  
Systematic Revision ◽  
Eastern Brazil ◽  
North Eastern

AbstractSarcosuchus hartii was a top predator that inhabited the fluvial and coastal areas of north-eastern Brazil during the Early Cretaceous. Several fossil remains were recovered during the late 19th and early 20th centuries from strata that outcrop in the Recôncavo Basin in the state of Bahia. A re-analysis of this material shows that S. hartii is a valid species. The Brazilian taxon differs from the African Sarcosuchus imperator in the unique pattern of anastomosing ornamentation observed on the enamel surface. The inclusion of S. hartii in a novel phylogenetic analysis recovered it inside Tethysuchia, a large clade comprising South and North American pholidosaurids along Elosuchidae and Dyrosauridae. The evolutionary origin of Sarcosuchus is likely related to a cladogenesis event that resulted from the break-up of Gondwana.

A redefinition of the genus Troglocharinus Reitter, 1908, with description of new species (Coleoptera, Leiodidae, Cholevinae, Leptodirini)

Zootaxa ◽  
2021 ◽  
Vol 4926 (2) ◽  
pp. 151-188
Author(s):  
JAVIER FRESNEDA ◽  
VALERIA RIZZO ◽  
JORDI COMAS ◽  
IGNACIO RIBERA
Keyword(s):  
Phylogenetic Analysis ◽  
New Species ◽  
Phylogenetic Analyses ◽  
Molecular Data ◽  
Valid Species ◽  
Distribution Area ◽  
Undescribed Species ◽  
Separate Species ◽  
Male And Female ◽  
New Material

We redefine the genus Troglocharinus Reitter, 1908 based on a phylogenetic analysis with a combination of mitochondrial and molecular data. We recovered the current Speonomites mengeli (Jeannel, 1910) and S. mercedesi (Zariquiey, 1922) as valid, separate species within the Troglocharinus clade, not directly related to Speonomites Jeannel, 1910, a finding corroborated by a detailed study of the male and female genitalia. In consequence, we reinstate Speonomus mercedesi Zariquiey, 1922 stat. nov. as a valid species, transfer both of them to the genus Troglocharinus, T. mengeli (Jeannel, 1910) comb. nov. and T. mercedesi (Zariquiey, 1922) comb. nov., and redescribe the genus. The study of new material from the distribution area of the former S. mengeli revealed the presence of two undescribed species, T. sendrai sp. nov. and T. fadriquei sp. nov., which we describe herein. We designate the lectotype of Speonomus vinyasi Escolà, 1971 to fix its identity, as among its syntypes there are two different species. In agreement with the results of the phylogenetic analyses we establish the synonymy between the genus Speonomites and Pallaresiella Fresneda, 1998 syn. nv. 

scholarly journals Taxonomic revision and phylogenetic relationships of Dasyloricaria Isbrücker & Nijssen, 1979 (Siluriformes: Loricariidae), with description of a new species

2016 ◽  
Vol 14 (1) ◽  
Author(s):  
Alejandro Londoño-Burbano ◽  
Roberto E. Reis
Keyword(s):  
Phylogenetic Analysis ◽  
New Species ◽  
Phylogenetic Relationships ◽  
Taxonomic Revision ◽  
Sister Group ◽  
Valid Species ◽  
Maracaibo Basin ◽  
New Synonyms ◽  
Branchial Arches ◽  
A New Species

ABSTRACT A taxonomic revision and phylogenetic analysis were completed for Dasyloricaria . The genus includes three valid species: D . filamentosa and D . latiura previously included in the genus, and a new species described herein. Dasyloricaria have a restricted trans-Andean distribution, with D . filamentosa occurring at the lower and middle Magdalena, lower Cauca, and Sinu in Colombia, and lago Maracaibo basin in Colombia and Venezuela; D . latiura in the Atrato and the Tuyra basins in Colombia and Panama, respectively; and the new species in the upper and middle Magdalena basin in Colombia. New synonyms for D . filamentosa and D . latiura are proposed, and a lectotype is designated for the latter. Dasyloricaria is herein recognized as monophyletic, with D . filamentosa as the sister group of D . latiura , and the new speciesas sister to that clade. Spatuloricaria is hypothesized to be the sister group of Dasyloricaria based on synapomorphies of the neurocranium, branchial arches and external morphology features. The subtribe Rineloricariina was partially corroborated through the phylogenetic analysis. An identification key for the species of Dasyloricaria is provided.

Cranial and post-cranial remains and phylogenetic relationships of the Gondwanan meiolaniform turtle Peligrochelys walshae from the Paleocene of Chubut, Argentina

2019 ◽  
Vol 93 (04) ◽  
pp. 798-821 ◽  
Author(s):  
Juliana Sterli ◽  
Marcelo S. de la Fuente
Keyword(s):  
Phylogenetic Analysis ◽  
3D Reconstruction ◽  
Early Cretaceous ◽  
Phylogenetic Relationships ◽  
Mass Extinction ◽  
Field Work ◽  
The Holocene ◽  
Previous Hypothesis ◽  
Postcranial Remains ◽  
Salamanca Formation

AbstractPeligrochelys walshae is a meiolaniform turtle originally described based on four specimens represented by cranial remains found in the classic locality of Punta Peligro (Chubut, Argentina) in outcrops of the Salamanca Formation (Danian). Recent field work in the vicinity of Punta Peligro resulted in the discovery of almost 30 new specimens, represented by cranial and postcranial remains that can be assigned to P. walshae. In this contribution, we provide a detailed anatomical description of the new specimens, provide an emended diagnosis for the species, and explore its phylogenetic relationships based on all anatomical data available for the species. The new specimens bring valuable information about the anatomy of the skull and postcranium of P. walshae as well as for meiolaniforms in general. The 3D preservation of the skull bones allows us to provide a 3D reconstruction using novel techniques. The updated phylogenetic analysis confirms that P. walshae is part of the clade Meiolaniformes, which spans from the Early Cretaceous until the Holocene and contains the giant, horned turtles (Meiolaniidae). This phylogenetic analysis reinforces the previous hypothesis that the clade Meiolaniformes is dominated by Gondwanan taxa, but also includes some Laurasian representatives. Alternate phylogenetic positions of taxa included in Meiolaniformes in this analysis were tested using the Templeton test. The lineage leading to Peligrochelys walshae is the only meiolaniform non-meiolaniid lineage to have survived the K-Pg mass extinction; its study provides valuable information to evaluate the effects of the K-Pg extinction in turtles.

scholarly journals New small-bodied ornithopods (Dinosauria, Neornithischia) from the Early Cretaceous Wonthaggi Formation (Strzelecki Group) of the Australian-Antarctic rift system, with revision ofQantassaurus intrepidusRich and Vickers-Rich, 1999

2019 ◽  
Vol 93 (3) ◽  
pp. 543-584 ◽  
Author(s):  
Matthew C. Herne ◽  
Jay P. Nair ◽  
Alistair R. Evans ◽  
Alan M. Tait
Keyword(s):  
Phylogenetic Analysis ◽  
Early Cretaceous ◽  
Rift System ◽  
Micro Ct ◽  
Internal Anatomy ◽  
Vertebrate Fauna ◽  
Southeastern Australia ◽  
Gippsland Basin

AbstractThe Flat Rocks locality in the Wonthaggi Formation (Strzelecki Group) of the Gippsland Basin, southeastern Australia, hosts fossils of a late Barremian vertebrate fauna that inhabited the ancient rift between Australia and Antarctica. Known from its dentary,Qantassaurus intrepidusRich and Vickers-Rich, 1999 has been the only dinosaur named from this locality. However, the plethora of vertebrate fossils collected from Flat Rocks suggests that further dinosaurs await discovery. From this locality, we name a new small-bodied ornithopod,Galleonosaurus dorisaen. gen. n. sp. from craniodental remains. Five ornithopodan genera are now named from Victoria.Galleonosaurus dorisaen. gen. n. sp. is known from five maxillae, from which the first description of jaw growth in an Australian dinosaur is provided. The holotype ofGalleonosaurus dorisaen. gen. n. sp. is the most complete dinosaur maxilla known from Victoria. Micro-CT imagery of the holotype reveals the complex internal anatomy of the neurovascular tract and antorbital fossa. We confirm thatQ. intrepidusis uniquely characterized by a deep foreshortened dentary. Two dentaries originally referred toQ. intrepidusare reassigned toQ.?intrepidusand a further maxilla is referred to cf.Atlascopcosaurus loadsiRich and Rich, 1989. A further ornithopod dentary morphotype is identified, more elongate than those ofQ. intrepidusandQ.?intrepidusand with three more tooth positions. This dentary might pertain toGalleonosaurus dorisaen. gen. n. sp. Phylogenetic analysis recovered Cretaceous Victorian and Argentinian nonstyracosternan ornithopods within the exclusively Gondwanan clade Elasmaria. However, the large-bodied taxonMuttaburrasaurus langdoniBartholomai and Molnar, 1981 is hypothesised as a basal iguanodontian with closer affinities to dryomorphans than to rhabdodontids.UUID:http://zoobank.org/4af87bb4-b687-42f3-9622-aa806a6b4116

New Psocoptera in the Early Cretaceous amber of SW France and Lebanon (Insecta: Psocoptera: Trogiomorpha)

2003 ◽  
Vol 140 (6) ◽  
pp. 669-683 ◽  
Author(s):  
VINCENT PERRICHOT ◽  
DANY AZAR ◽  
DIDIER NERAUDEAU ◽  
ANDRE NEL
Keyword(s):  
Phylogenetic Analysis ◽  
New Taxa ◽  
Early Cretaceous ◽  
Sw France

Proprionoglarisguyoti gen. nov., sp. nov., Parapsyllipsocus vergereaui gen. nov., sp. nov., and Prospeleketoralbianensis gen. nov., sp. nov. are described from the Early Cretaceous amber of Archingeay (SW France). Libanoglarismouawadi gen. nov., sp. nov. is described from the Early Cretaceous amber of Lebanon. They are all placed into the suborder Trogiomorpha, incertae familiae. The discovery of these new taxa together with a first phylogenetic analysis of the trogiomorphan families demonstrate the necessity of a cladistic redefinition of the currently admitted major subdivisions of this suborder.

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