The Experts below are selected from a list of 1953 Experts worldwide ranked by ideXlab platform
Yongjie Wang - One of the best experts on this subject based on the ideXlab platform.
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Transitional Fossil earwigs - a missing link in Dermaptera evolution
BMC evolutionary biology, 2010Co-Authors: Jingxia Zhao, Yunyun Zhao, Dong Ren, Chungkun Shih, Yongjie WangAbstract:The Dermaptera belongs to a group of winged insects of uncertain relationship within Polyneoptera, which has expanded anal region and adds numerous anal veins in the hind wing. Evolutional history and origin of Dermaptera have been in contention. In this paper, we report two new Fossil earwigs in a new family of Bellodermatidae fam. nov. The Fossils were collected from the Jiulongshan Formation (Middle Jurassic) in Inner Mongolia, northeast China. This new family, characterized by an unexpected combination of primitive and derived characters, is bridging the missing link between suborders of Archidermaptera and Eodermaptera. Phylogenetic analyses support the new family to be a new clade at the base of previously defined Eodermaptera and to be a stem group of (Eodermaptera+Neodermaptera). Evolutional history and origin of Dermaptera have been in contention, with dramatically different viewpoints by contemporary authors. It is suggested that the oldest Dermaptera might possibly be traced back to the Late Triassic-Early Jurassic and they had divided into Archidermaptera and (Eodermaptera+Neodermaptera) in the Middle Jurassic.
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Transitional Fossil earwigs - a missing link in
2010Co-Authors: Jingxia Zhao, Yunyun Zhao, Dong Ren, Yongjie WangAbstract:Background: The Dermaptera belongs to a group of winged insects of uncertain relationship within Polyneoptera, which has expanded anal region and adds numerous anal veins in the hind wing. Evolutional history and origin of Dermaptera have been in contention. Results: In this paper, we report two new Fossil earwigs in a new family of Bellodermatidae fam. nov. The Fossils were collected from the Jiulongshan Formation (Middle Jurassic) in Inner Mongolia, northeast China. This new family, characterized by an unexpected combination of primitive and derived characters, is bridging the missing link between suborders of Archidermaptera and Eodermaptera. Phylogenetic analyses support the new family to be a new clade at the base of previously defined Eodermaptera and to be a stem group of (Eodermaptera +Neodermaptera). Conclusion: Evolutional history and origin of Dermaptera have been in contention, with dramatically different viewpoints by contemporary authors. It is suggested that the oldest Dermaptera might possibly be traced back to the Late Triassic-Early Jurassic and they had divided into Archidermaptera and (Eodermaptera+Neodermaptera) in the Middle Jurassic.
Dong Ren - One of the best experts on this subject based on the ideXlab platform.
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New Transitional Fossil snakeflies from China illuminate the early evolution of Raphidioptera
BMC evolutionary biology, 2014Co-Authors: Xingyue Liu, Dong Ren, Ding YangAbstract:Background Raphidioptera (snakeflies) is a holometabolous order of the superorder Neuropterida characterized by the narrowly elongate adult prothorax and the long female ovipositor. Mesozoic snakeflies were markedly more diverse than the modern ones are. However, the evolutionary history of Raphidioptera is largely unexplored, as a result of the poorly studied phylogeny among Fossil and extant lineages within the order.
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Transitional Fossil earwigs - a missing link in Dermaptera evolution
BMC evolutionary biology, 2010Co-Authors: Jingxia Zhao, Yunyun Zhao, Dong Ren, Chungkun Shih, Yongjie WangAbstract:The Dermaptera belongs to a group of winged insects of uncertain relationship within Polyneoptera, which has expanded anal region and adds numerous anal veins in the hind wing. Evolutional history and origin of Dermaptera have been in contention. In this paper, we report two new Fossil earwigs in a new family of Bellodermatidae fam. nov. The Fossils were collected from the Jiulongshan Formation (Middle Jurassic) in Inner Mongolia, northeast China. This new family, characterized by an unexpected combination of primitive and derived characters, is bridging the missing link between suborders of Archidermaptera and Eodermaptera. Phylogenetic analyses support the new family to be a new clade at the base of previously defined Eodermaptera and to be a stem group of (Eodermaptera+Neodermaptera). Evolutional history and origin of Dermaptera have been in contention, with dramatically different viewpoints by contemporary authors. It is suggested that the oldest Dermaptera might possibly be traced back to the Late Triassic-Early Jurassic and they had divided into Archidermaptera and (Eodermaptera+Neodermaptera) in the Middle Jurassic.
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Transitional Fossil earwigs - a missing link in
2010Co-Authors: Jingxia Zhao, Yunyun Zhao, Dong Ren, Yongjie WangAbstract:Background: The Dermaptera belongs to a group of winged insects of uncertain relationship within Polyneoptera, which has expanded anal region and adds numerous anal veins in the hind wing. Evolutional history and origin of Dermaptera have been in contention. Results: In this paper, we report two new Fossil earwigs in a new family of Bellodermatidae fam. nov. The Fossils were collected from the Jiulongshan Formation (Middle Jurassic) in Inner Mongolia, northeast China. This new family, characterized by an unexpected combination of primitive and derived characters, is bridging the missing link between suborders of Archidermaptera and Eodermaptera. Phylogenetic analyses support the new family to be a new clade at the base of previously defined Eodermaptera and to be a stem group of (Eodermaptera +Neodermaptera). Conclusion: Evolutional history and origin of Dermaptera have been in contention, with dramatically different viewpoints by contemporary authors. It is suggested that the oldest Dermaptera might possibly be traced back to the Late Triassic-Early Jurassic and they had divided into Archidermaptera and (Eodermaptera+Neodermaptera) in the Middle Jurassic.
Jingxia Zhao - One of the best experts on this subject based on the ideXlab platform.
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Transitional Fossil earwigs - a missing link in Dermaptera evolution
BMC evolutionary biology, 2010Co-Authors: Jingxia Zhao, Yunyun Zhao, Dong Ren, Chungkun Shih, Yongjie WangAbstract:The Dermaptera belongs to a group of winged insects of uncertain relationship within Polyneoptera, which has expanded anal region and adds numerous anal veins in the hind wing. Evolutional history and origin of Dermaptera have been in contention. In this paper, we report two new Fossil earwigs in a new family of Bellodermatidae fam. nov. The Fossils were collected from the Jiulongshan Formation (Middle Jurassic) in Inner Mongolia, northeast China. This new family, characterized by an unexpected combination of primitive and derived characters, is bridging the missing link between suborders of Archidermaptera and Eodermaptera. Phylogenetic analyses support the new family to be a new clade at the base of previously defined Eodermaptera and to be a stem group of (Eodermaptera+Neodermaptera). Evolutional history and origin of Dermaptera have been in contention, with dramatically different viewpoints by contemporary authors. It is suggested that the oldest Dermaptera might possibly be traced back to the Late Triassic-Early Jurassic and they had divided into Archidermaptera and (Eodermaptera+Neodermaptera) in the Middle Jurassic.
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Transitional Fossil earwigs - a missing link in
2010Co-Authors: Jingxia Zhao, Yunyun Zhao, Dong Ren, Yongjie WangAbstract:Background: The Dermaptera belongs to a group of winged insects of uncertain relationship within Polyneoptera, which has expanded anal region and adds numerous anal veins in the hind wing. Evolutional history and origin of Dermaptera have been in contention. Results: In this paper, we report two new Fossil earwigs in a new family of Bellodermatidae fam. nov. The Fossils were collected from the Jiulongshan Formation (Middle Jurassic) in Inner Mongolia, northeast China. This new family, characterized by an unexpected combination of primitive and derived characters, is bridging the missing link between suborders of Archidermaptera and Eodermaptera. Phylogenetic analyses support the new family to be a new clade at the base of previously defined Eodermaptera and to be a stem group of (Eodermaptera +Neodermaptera). Conclusion: Evolutional history and origin of Dermaptera have been in contention, with dramatically different viewpoints by contemporary authors. It is suggested that the oldest Dermaptera might possibly be traced back to the Late Triassic-Early Jurassic and they had divided into Archidermaptera and (Eodermaptera+Neodermaptera) in the Middle Jurassic.
Yunyun Zhao - One of the best experts on this subject based on the ideXlab platform.
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Transitional Fossil earwigs - a missing link in Dermaptera evolution
BMC evolutionary biology, 2010Co-Authors: Jingxia Zhao, Yunyun Zhao, Dong Ren, Chungkun Shih, Yongjie WangAbstract:The Dermaptera belongs to a group of winged insects of uncertain relationship within Polyneoptera, which has expanded anal region and adds numerous anal veins in the hind wing. Evolutional history and origin of Dermaptera have been in contention. In this paper, we report two new Fossil earwigs in a new family of Bellodermatidae fam. nov. The Fossils were collected from the Jiulongshan Formation (Middle Jurassic) in Inner Mongolia, northeast China. This new family, characterized by an unexpected combination of primitive and derived characters, is bridging the missing link between suborders of Archidermaptera and Eodermaptera. Phylogenetic analyses support the new family to be a new clade at the base of previously defined Eodermaptera and to be a stem group of (Eodermaptera+Neodermaptera). Evolutional history and origin of Dermaptera have been in contention, with dramatically different viewpoints by contemporary authors. It is suggested that the oldest Dermaptera might possibly be traced back to the Late Triassic-Early Jurassic and they had divided into Archidermaptera and (Eodermaptera+Neodermaptera) in the Middle Jurassic.
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Transitional Fossil earwigs - a missing link in
2010Co-Authors: Jingxia Zhao, Yunyun Zhao, Dong Ren, Yongjie WangAbstract:Background: The Dermaptera belongs to a group of winged insects of uncertain relationship within Polyneoptera, which has expanded anal region and adds numerous anal veins in the hind wing. Evolutional history and origin of Dermaptera have been in contention. Results: In this paper, we report two new Fossil earwigs in a new family of Bellodermatidae fam. nov. The Fossils were collected from the Jiulongshan Formation (Middle Jurassic) in Inner Mongolia, northeast China. This new family, characterized by an unexpected combination of primitive and derived characters, is bridging the missing link between suborders of Archidermaptera and Eodermaptera. Phylogenetic analyses support the new family to be a new clade at the base of previously defined Eodermaptera and to be a stem group of (Eodermaptera +Neodermaptera). Conclusion: Evolutional history and origin of Dermaptera have been in contention, with dramatically different viewpoints by contemporary authors. It is suggested that the oldest Dermaptera might possibly be traced back to the Late Triassic-Early Jurassic and they had divided into Archidermaptera and (Eodermaptera+Neodermaptera) in the Middle Jurassic.
Enrico Maria Corsini - One of the best experts on this subject based on the ideXlab platform.
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Fossil group origins IV. Characterization of the sample and observational properties of Fossil systems
Astronomy & Astrophysics, 2014Co-Authors: S. Zarattini, R. Barrena, Marisa Girardi, N. Castro-rodríguez, W. Boschin, J. A. L. Aguerri, Jairo Méndez-abreu, Rubén Sánchez-janssen, C. Catalán-torrecilla, Enrico Maria CorsiniAbstract:Context. Virialized halos grow by the accretion of smaller ones in the cold dark matter scenario. The rate of accretion depends on the different properties of the host halo. Those halos for which this accretion rate was very fast and efficient resulted in systems dominated by a central galaxy surrounded by smaller galaxies that were at least two magnitudes fainter. These galaxy systems are called Fossil systems, and they can be the Fossil relics of ancient galaxy structures. Aims. We started an extensive observational program to characterize a sample of 34 Fossil group candidates spanning a broad range of physical properties. Methods. Deep r-band images were obtained with the 2.5-m Isaac Newton Telescope and Nordic Optic Telescope. Optical spectroscopic observations were performed at the 3.5-m Telescopio Nazionale Galileo for similar to 1200 galaxies. This new dataset was completed with Sloan Digital Sky Survey Data Release 7 archival data to obtain robust cluster membership and global properties of each Fossil group candidate. For each system, we recomputed the magnitude gaps between the two brightest galaxies (Delta m(12)) and the first and fourth ranked galaxies (Delta m(14)) within 0.5 R-200. We consider Fossil systems to be those with Delta m(12) >= 2 mag or Delta m(14) >= 2.5 mag within the errors. Results. We find that 15 candidates turned out to be Fossil systems. Their observational properties agree with those of non-Fossil systems. Both follow the same correlations, but the Fossil systems are always extreme cases. In particular, they host the brightest central galaxies, and the fraction of total galaxy light enclosed in the brightest group galaxy is larger in Fossil than in non-Fossil systems. Finally, we confirm the existence of genuine Fossil clusters. Conclusions. Combining our results with others in the literature, we favor the merging scenario in which Fossil systems formed from mergers of L* galaxies. The large magnitude gap is a consequence of the extreme merger ratio within Fossil systems and therefore it is an evolutionary effect. Moreover, we suggest that at least one Fossil group candidate in our sample could represent a Transitional Fossil stage. This system could have been a Fossil in the past, but not now owing to the recent accretion of another group of galaxies.
