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Dong Ren - One of the best experts on this subject based on the ideXlab platform.
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a new earwig dermaptera pygidicranidae from the Upper Cretaceous myanmar amber
Cretaceous Research, 2017Co-Authors: Mingyue Ren, Chungkun Shih, Weiting Zhang, Dong RenAbstract:Abstract A new genus and species, Gracilipygia canaliculata gen. et sp. nov., in the family Pygidicranidae of Dermaptera is described from the Upper Cretaceous Myanmar amber. The new species is assigned to the subfamily Pyragrinae mainly based on the following characters: broadly separated cercal forceps without segmentation and the posterior abdominal tergum with mediolongitudinal furrow and lateral ridges. The G. canaliculata gen. et sp. nov. is the earliest record hitherto for the subfamily Pyragrinae, and probably represents a stem taxa of Pyragrinae.
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Phylogeny of Stephanidae (Hymenoptera: Apocrita) with a new genus from Upper Cretaceous Myanmar amber
Systematic Entomology, 2017Co-Authors: Alexandr P. Rasnitsyn, Chungkun Shih, Conrad C. Labandeira, Dong RenAbstract:A new wasp species, Lagenostephanus lii Li, Rasnitsyn, Shih and Ren gen. et sp.n., is assigned to Stephaninae (Hymenoptera: Stephanidae). The specimen is described from the lowermost Upper Cretaceous Myanmar (Burmese) amber. This is the second stephanid wasp described from Myanmar amber after Kronostephanus zigrasi Engel & Grimaldi, representing the earliest fossil occurrences of Stephanidae. Based on morphological characters of all extant and extinct genera, a phylogenetic analysis of Stephanidae was conducted. The results indicate that Schlettereriinae and Stephaninae are monophyletic, whereas Electrostephanus Brues, as the only genus within Electrostephaninae, belongs to Stephaninae. Therefore, we propose a synonymy of Electrostephaninae with Stephaninae. Based on the fossil evidence, we infer that the family of Stephanidae was significantly diverse in the Late Cretaceous and that they originated during the Early Cretaceous or late Jurassic. A key to genera of Stephanidae is provided. This published work has been registered in ZooBank, http://zoobank.org/urn:lsid:zoobank.org:pub:C082C245-8FD3-42B0-880F-94333286500B.
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The first record of Ichneumonidae (Insecta: Hymenoptera) from the Upper Cretaceous of Myanmar
Cretaceous Research, 2017Co-Authors: Dmitry S. Kopylov, Chungkun Shih, Dong RenAbstract:A new subfamily of Ichneumonidae, Novichneumoninae subfam. nov., is established based on two new genera with two new species: Novichneumon longus gen. et sp. nov. and Caloichneumon perrarus gen. et sp. nov. These two new species are the first ichneumonids described from the Upper Cretaceous Myanmar (Burmese) amber. A list of all described Mesozoic ichneumonid fossil species with their respective localities and ages is summarized. The distribution of Ichneumonoidea during the Cretaceous indicates that Cretaceous ichneumonids were documented from localities at high latitudes while braconids were distributed worldwide, a pattern consistent with the distribution of extant ichneumonids and braconids.
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new beaded lacewings neuroptera berothidae from Upper Cretaceous myanmar amber
Cretaceous Research, 2016Co-Authors: Dandan Yuan, Dong Ren, Yongjie WangAbstract:Abstract Two new genera with two new species in Berothidae, Maculaberotha nervosa gen. et sp. nov. and Magniberotha recurrens gen. et sp. nov., are described from Upper Cretaceous Myanmar (Burmese) amber. Based on the new specimens of the same species, we propose some venational characters as intraspecific variations, e.g., the markings on the wings and crossveins in the radial sector. We also study and compare the female genital sclerites from three genera of Haploberotha , Dasyberotha , and Jersiberotha to highlight the importance of using these characters preserved in amber for taxonomic and phylogenetic studies. Furthermore, an updated key to the berothid genera of Myanmar amber is provided.
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the oldest armoured harvestman arachnida opiliones laniatores from Upper Cretaceous myanmar amber
Cretaceous Research, 2016Co-Authors: Weiwei Zhang, Paul A Selden, Jason A Dunlop, Gonzalo Giribet, Dong RenAbstract:Abstract The oldest laniatorean harvestman, Petrobunoides sharmai gen. et sp. nov. (Opiliones: Laniatores) is described, from the Upper Cretaceous (lowermost Cenomanian) amber of Myanmar. This is the first fossil Laniatores recovered from Southeast Asia, which is placed in the extant family Epedanidae. It is also the first fossil known within the superfamily Epedanoidea; a relatively derived clade of Laniatores restricted to Southeast Asia today. At ca. 99 Ma, this new amber inclusion is substantially older than the previous oldest record of a member of Laniatores from Baltic amber (ca. 44–49 Ma); however, given the Palaeozoic age of Laniatores implied by molecular data, the new record from Burmese amber is probably still too young for constraining or calibrating the date of cladogenesis for total group Laniatores. Nevertheless, it provides a much better constraint for Epedanoidea, adding the first useful laniatorean fossil to provide an internal calibration point for a clade of Grassatores.
Chungkun Shih - One of the best experts on this subject based on the ideXlab platform.
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a new earwig dermaptera pygidicranidae from the Upper Cretaceous myanmar amber
Cretaceous Research, 2017Co-Authors: Mingyue Ren, Chungkun Shih, Weiting Zhang, Dong RenAbstract:Abstract A new genus and species, Gracilipygia canaliculata gen. et sp. nov., in the family Pygidicranidae of Dermaptera is described from the Upper Cretaceous Myanmar amber. The new species is assigned to the subfamily Pyragrinae mainly based on the following characters: broadly separated cercal forceps without segmentation and the posterior abdominal tergum with mediolongitudinal furrow and lateral ridges. The G. canaliculata gen. et sp. nov. is the earliest record hitherto for the subfamily Pyragrinae, and probably represents a stem taxa of Pyragrinae.
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two new species of archipseudophasmatidae insecta phasmatodea from Upper Cretaceous myanmar amber
Cretaceous Research, 2017Co-Authors: Sha Chen, Chungkun Shih, Weiwei ZhangAbstract:Abstract Two new stick insect nymphs, Pseudoperla scapiforma sp. nov. and Pseudoperla leptoclada sp. nov. in Archipseudophasmatidae of Phasmatodea, are described from the Upper Cretaceous Myanmar amber. Compared to Pseudoperla gracilipes Pictet & Berendt, 1854, the two new species have the following differential characters: flagellomeres significantly elongated, metanotum rectangular and median segment longer than metanotum. Furthermore, the mesonotum of Pseudoperla leptoclada sp. nov. is rectangular and considerably longer than pronotum vs. mesonotum is quadrate and slightly shorter than pronotum in P. gracilipes. In addition, a slight curvature in the profemora indicates the Cretaceous evolutionary origin of this important character of Euphasmatodea. These two new taxa not only broaden the diversity of Archipseudophasmatidae, but also dated this family back to the Upper Cretaceous.
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Phylogeny of Stephanidae (Hymenoptera: Apocrita) with a new genus from Upper Cretaceous Myanmar amber
Systematic Entomology, 2017Co-Authors: Alexandr P. Rasnitsyn, Chungkun Shih, Conrad C. Labandeira, Dong RenAbstract:A new wasp species, Lagenostephanus lii Li, Rasnitsyn, Shih and Ren gen. et sp.n., is assigned to Stephaninae (Hymenoptera: Stephanidae). The specimen is described from the lowermost Upper Cretaceous Myanmar (Burmese) amber. This is the second stephanid wasp described from Myanmar amber after Kronostephanus zigrasi Engel & Grimaldi, representing the earliest fossil occurrences of Stephanidae. Based on morphological characters of all extant and extinct genera, a phylogenetic analysis of Stephanidae was conducted. The results indicate that Schlettereriinae and Stephaninae are monophyletic, whereas Electrostephanus Brues, as the only genus within Electrostephaninae, belongs to Stephaninae. Therefore, we propose a synonymy of Electrostephaninae with Stephaninae. Based on the fossil evidence, we infer that the family of Stephanidae was significantly diverse in the Late Cretaceous and that they originated during the Early Cretaceous or late Jurassic. A key to genera of Stephanidae is provided. This published work has been registered in ZooBank, http://zoobank.org/urn:lsid:zoobank.org:pub:C082C245-8FD3-42B0-880F-94333286500B.
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The first record of Ichneumonidae (Insecta: Hymenoptera) from the Upper Cretaceous of Myanmar
Cretaceous Research, 2017Co-Authors: Dmitry S. Kopylov, Chungkun Shih, Dong RenAbstract:A new subfamily of Ichneumonidae, Novichneumoninae subfam. nov., is established based on two new genera with two new species: Novichneumon longus gen. et sp. nov. and Caloichneumon perrarus gen. et sp. nov. These two new species are the first ichneumonids described from the Upper Cretaceous Myanmar (Burmese) amber. A list of all described Mesozoic ichneumonid fossil species with their respective localities and ages is summarized. The distribution of Ichneumonoidea during the Cretaceous indicates that Cretaceous ichneumonids were documented from localities at high latitudes while braconids were distributed worldwide, a pattern consistent with the distribution of extant ichneumonids and braconids.
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a new genus and species of praeaulacidae hymenoptera evanioidea from Upper Cretaceous myanmar amber
Cretaceous Research, 2015Co-Authors: Chungkun Shih, Alexandr P. Rasnitsyn, Dong RenAbstract:Abstract A new fossil praeaulacid wasp, Habraulacus zhaoi gen. et sp. nov., is described and figured from Upper Cretaceous Myanmar amber. The new genus is established based on the following characters: mesosoma stout, metasoma elongated ellipse with the first metasomal segment very thin and tubular (like a petiole), forewing with pterostigma long and narrow, and both veins Rs+M and 1m-cu very long, forming a long cell 1mcu. Species of Praeaulacidae demonstrate a distinct evolutionary trend, which consists of miniaturization, venational reduction and enlargement of pterostigma, and reduction of number of the antennal segments from the Jurassic to Cretaceous. However, except for the miniaturization, this hardly concerns Habraulacus.
Diying Huang - One of the best experts on this subject based on the ideXlab platform.
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A new riffle beetle in Upper Cretaceous amber from northern Myanmar (Coleoptera: Elmidae)
Cretaceous Research, 2018Co-Authors: Chenyang Cai, Crystal A. Maier, Diying HuangAbstract:Abstract A new riffle beetle is described and figured based on an exceptionally well-preserved individual preserved in Upper Cretaceous amber from northern Myanmar. Cretohypsilara parva gen. et sp. nov. is undoubtedly placed in the extant beetle family Elmidae, not assigned to a precise subfamily, though it represents the first record of a fossil riffle beetle possessing characteristics of the subfamily Larainae, including elongate subovate body covered with dense pubescence, clubbed antennae, and exposed protrochantins. It represents the oldest definitive record for the family, based on genitalic morphology, long claws, and the distinctive expanded prosternum. This Cretaceous riffle beetle is also probably a true water beetle, living in running water, providing information about the poorly known aquatic beetle fauna in the Mesozoic.
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protonicagus tani gen et sp nov the first stag beetles from Upper Cretaceous burmese amber coleoptera lucanidae aesalinae nicagini
Cretaceous Research, 2017Co-Authors: Chenyang Cai, Ziwei Yin, Ye Liu, Diying HuangAbstract:Abstract The first stag beetle from the Upper Cretaceous Burmese amber is described and figured. Protonicagus tani gen. et sp. nov. is firmly placed in the extant lucanid subfamily Aesalinae based on the narrow prosternal process, the non-geniculate antenna, and the pronotal and elytral vestiture with conspicuous scales. Protonicagus tani represents the first fossil record for the tribe Nicagini. Along with the modern disjunctive distribution pattern of the closely related Nicagus LeConte in the North America and Japan, our discovery indicates that Nicagini are probably an ancient group, and they were widespread at least in Laurasia before the continent eventually broke up.
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first fossil coloninae from Upper Cretaceous burmese amber coleoptera staphylinoidea leiodidae
Cretaceous Research, 2017Co-Authors: Chenyang Cai, Diying HuangAbstract:Abstract Fossil leiodids are sparse, and they are confined to the Cenozoic. Here we describe and illustrate the first definitive Mesozoic leiodid, Colonellus burmiticus sp. nov., based on two well-preserved adults from the Upper Cretaceous Burmese amber. The fossil is firmly placed in the extant Coloninae based on multiple synapomorphies, such as antennae with normal-sized antennomere 8 and abdominal intersegmental membranes with “brick-wall” pattern. It can be further assigned to the extant genus Colonellus (subgenus Pentacolonellus ) by its five-segmented antennal club. The discovery suggests that Colonellus is an ancient group, originating no later than the mid-Cretaceous.
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an unusual new lineage of sawflies hymenoptera in Upper Cretaceous amber from northern myanmar
Cretaceous Research, 2016Co-Authors: Michael S Engel, Diying Huang, Abdulaziz S Alqarni, Chenyang CaiAbstract:Abstract A peculiar new lineage of sawflies (‘Symphyta’) is described and figured from a female beautifully preserved in Upper Cretaceous (Cenomanian) amber from northern Myanmar. Syspastoxyela rhaphidia Engel and Huang, gen. et sp. nov., shares many plesiomorphic features with the primitive Xyelidae, †Xyelotomidae, and †Xyelydidae such as enlarged and thickened first flagellomere succeeded by a series of thinner and shorter flagellomeres, absence of a transverse mesoscutal sulcus, multiple preapical spurs, and two protibial spurs among other traits. However, the new lineage has an apomorphically contracted forewing venation, lacks a subcostal vein, has a single marginal cell, and lacks crossvein 1r-rs, and thus it is segregated into a new family, Syspastoxyelidae Engel and Huang, fam. nov. The phylogenetic affinities of the new family are discussed and a position near Pamphilioidea or Pamphilioidea + Unicalcarida is advocated.
Chenyang Cai - One of the best experts on this subject based on the ideXlab platform.
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A new riffle beetle in Upper Cretaceous amber from northern Myanmar (Coleoptera: Elmidae)
Cretaceous Research, 2018Co-Authors: Chenyang Cai, Crystal A. Maier, Diying HuangAbstract:Abstract A new riffle beetle is described and figured based on an exceptionally well-preserved individual preserved in Upper Cretaceous amber from northern Myanmar. Cretohypsilara parva gen. et sp. nov. is undoubtedly placed in the extant beetle family Elmidae, not assigned to a precise subfamily, though it represents the first record of a fossil riffle beetle possessing characteristics of the subfamily Larainae, including elongate subovate body covered with dense pubescence, clubbed antennae, and exposed protrochantins. It represents the oldest definitive record for the family, based on genitalic morphology, long claws, and the distinctive expanded prosternum. This Cretaceous riffle beetle is also probably a true water beetle, living in running water, providing information about the poorly known aquatic beetle fauna in the Mesozoic.
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protonicagus tani gen et sp nov the first stag beetles from Upper Cretaceous burmese amber coleoptera lucanidae aesalinae nicagini
Cretaceous Research, 2017Co-Authors: Chenyang Cai, Ziwei Yin, Ye Liu, Diying HuangAbstract:Abstract The first stag beetle from the Upper Cretaceous Burmese amber is described and figured. Protonicagus tani gen. et sp. nov. is firmly placed in the extant lucanid subfamily Aesalinae based on the narrow prosternal process, the non-geniculate antenna, and the pronotal and elytral vestiture with conspicuous scales. Protonicagus tani represents the first fossil record for the tribe Nicagini. Along with the modern disjunctive distribution pattern of the closely related Nicagus LeConte in the North America and Japan, our discovery indicates that Nicagini are probably an ancient group, and they were widespread at least in Laurasia before the continent eventually broke up.
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first fossil coloninae from Upper Cretaceous burmese amber coleoptera staphylinoidea leiodidae
Cretaceous Research, 2017Co-Authors: Chenyang Cai, Diying HuangAbstract:Abstract Fossil leiodids are sparse, and they are confined to the Cenozoic. Here we describe and illustrate the first definitive Mesozoic leiodid, Colonellus burmiticus sp. nov., based on two well-preserved adults from the Upper Cretaceous Burmese amber. The fossil is firmly placed in the extant Coloninae based on multiple synapomorphies, such as antennae with normal-sized antennomere 8 and abdominal intersegmental membranes with “brick-wall” pattern. It can be further assigned to the extant genus Colonellus (subgenus Pentacolonellus ) by its five-segmented antennal club. The discovery suggests that Colonellus is an ancient group, originating no later than the mid-Cretaceous.
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an unusual new lineage of sawflies hymenoptera in Upper Cretaceous amber from northern myanmar
Cretaceous Research, 2016Co-Authors: Michael S Engel, Diying Huang, Abdulaziz S Alqarni, Chenyang CaiAbstract:Abstract A peculiar new lineage of sawflies (‘Symphyta’) is described and figured from a female beautifully preserved in Upper Cretaceous (Cenomanian) amber from northern Myanmar. Syspastoxyela rhaphidia Engel and Huang, gen. et sp. nov., shares many plesiomorphic features with the primitive Xyelidae, †Xyelotomidae, and †Xyelydidae such as enlarged and thickened first flagellomere succeeded by a series of thinner and shorter flagellomeres, absence of a transverse mesoscutal sulcus, multiple preapical spurs, and two protibial spurs among other traits. However, the new lineage has an apomorphically contracted forewing venation, lacks a subcostal vein, has a single marginal cell, and lacks crossvein 1r-rs, and thus it is segregated into a new family, Syspastoxyelidae Engel and Huang, fam. nov. The phylogenetic affinities of the new family are discussed and a position near Pamphilioidea or Pamphilioidea + Unicalcarida is advocated.
Alexandr P. Rasnitsyn - One of the best experts on this subject based on the ideXlab platform.
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Phylogeny of Stephanidae (Hymenoptera: Apocrita) with a new genus from Upper Cretaceous Myanmar amber
Systematic Entomology, 2017Co-Authors: Alexandr P. Rasnitsyn, Chungkun Shih, Conrad C. Labandeira, Dong RenAbstract:A new wasp species, Lagenostephanus lii Li, Rasnitsyn, Shih and Ren gen. et sp.n., is assigned to Stephaninae (Hymenoptera: Stephanidae). The specimen is described from the lowermost Upper Cretaceous Myanmar (Burmese) amber. This is the second stephanid wasp described from Myanmar amber after Kronostephanus zigrasi Engel & Grimaldi, representing the earliest fossil occurrences of Stephanidae. Based on morphological characters of all extant and extinct genera, a phylogenetic analysis of Stephanidae was conducted. The results indicate that Schlettereriinae and Stephaninae are monophyletic, whereas Electrostephanus Brues, as the only genus within Electrostephaninae, belongs to Stephaninae. Therefore, we propose a synonymy of Electrostephaninae with Stephaninae. Based on the fossil evidence, we infer that the family of Stephanidae was significantly diverse in the Late Cretaceous and that they originated during the Early Cretaceous or late Jurassic. A key to genera of Stephanidae is provided. This published work has been registered in ZooBank, http://zoobank.org/urn:lsid:zoobank.org:pub:C082C245-8FD3-42B0-880F-94333286500B.
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a new genus and species of praeaulacidae hymenoptera evanioidea from Upper Cretaceous myanmar amber
Cretaceous Research, 2015Co-Authors: Chungkun Shih, Alexandr P. Rasnitsyn, Dong RenAbstract:Abstract A new fossil praeaulacid wasp, Habraulacus zhaoi gen. et sp. nov., is described and figured from Upper Cretaceous Myanmar amber. The new genus is established based on the following characters: mesosoma stout, metasoma elongated ellipse with the first metasomal segment very thin and tubular (like a petiole), forewing with pterostigma long and narrow, and both veins Rs+M and 1m-cu very long, forming a long cell 1mcu. Species of Praeaulacidae demonstrate a distinct evolutionary trend, which consists of miniaturization, venational reduction and enlargement of pterostigma, and reduction of number of the antennal segments from the Jurassic to Cretaceous. However, except for the miniaturization, this hardly concerns Habraulacus.