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George Poinar 《Cretaceous Research》2009,30(5):1066-1072
Two Early Cretaceous Burmese amber cockroaches contained protists related to mutualistic flagellates occurring in extant Cryptocercus cockroaches and lower termites. The fossil protists are described as Devescovites proteus Poinar n. gen., n. sp. (Parabasalia: Trichomonadida: Devescovinidae), Paleotrichomones burmanicus Poinar n. gen., n. sp. (Parabasalia: Trichomonida), Burmanymphus cretacea Poinar n. gen., n. sp. (Hypermastigia: Trichonymphida: Burmanymphidae n. fam.) and Oxymonas gigantea Poinar, n. sp. Additional putative protists are also illustrated. Evolutionary implications of this discovery are discussed. 相似文献
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A new false jewel beetle, Mesoschizopus elegans n. gen. n. sp., is described and illustrated based on a well-preserved impression fossil from the Lower Cretaceous Yixian Formation of China. It represents a definitive Mesozoic fossil belonging to the recent small buprestoid family Schizopodidae, which is now endemic to the western North America. Mesoschizopus is placed in Schizopodidae based on its overall body shape and size, short prosternum in front of procoxae, wide metanepisternum, and wing venation. The discovery of the first schizopodid from the Early Cretaceous not only highlights the antiquity of the small family, but also provides an example of a now narrowly distributed group whose ancestral groups were probably more widespread in the Mesozoic. 相似文献
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The Cretaceous new species and genus Albocryptophagus cantabricus gen. et sp. n. is described based on a fossil specimen from the El Soplao amber deposit (Spain). The new genus is similar to the extant genera Cryptophagus and Micrambe, but differs from them in the transverse pedicel, anterior angles of pronotum, pronotal margin unmodified, pronotal pits absent. Albocryptophagus gen. n. is undoubtedly the most ancient representative for the subfamily Cryptophaginae described up today. Because the saproxylic habits in recent species of the family, a similar behavior is inferred for this new fossil. It is a new example that agrees with the idea that fossil beetles from Mesozoic ambers are characterized by a saproxylic lifestyle. 相似文献
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A new genus Barbderma gen. nov. with a new species, Barbderma oblonguata sp. nov., and a new species, Sinoprotodiplatys ellipsoideuata sp. nov., of the family Protodiplatyidae are described from the Lower Cretaceous Yixian Formation at the Huangbanjigou Village, Beipiao City, Liaoning Province, China. Both new species are assigned to Protodiplatyidae mainly based on their diagnostic characters of antenna, pronotum, tegmina, tarsi and the distinct long, slender, multi-segmented cerci. These findings of fossil Protodiplatyidae provide more evidence to confirm the existence of these basal earwigs in the Early Cretaceous. Key diagnostic characters for genera of Protodiplatyidae are compared to highlight the generic variations and similarities. Evolutionary trend of cerci morphology suggests that it is likely that the cerci were evolved from long, slender and segmented to the stout terminal forceps without segmentation. 相似文献
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The new tribe Mediumiugamiini (Coleoptera: Polyphaga: Tenebrionoidea: Mordellidae) is described based on Mediumiuga sinespinis gen. et sp. nov. It is a fossil beetle from Albian (Early Cretaceous) amber from the Peñacerrada I outcrop (Spain). It is the first Spanish beetle described in amber. The mesotibiae and mesotarsi bearing multiple dorsal–lateral ridges, running oblique, metatibiae without any dorsal or dorsal–lateral ridge, only showing a subapical ridge, and metatibiae without apical spurs, define the new tribe. A key for worldwide tribes of Mordellinae, including Mediumiugamiini, is provided. Evolution of some characters of Mordellidae along Cretaceous is discussed. 相似文献
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Two new genera and species of fossil chrysidoid wasps belonging to the families Chrysididae and Bethylidae are described from Charentese (Fouras Bois-Vert and Archingeay) lower Upper Cretaceous amber of France. New taxa include: Sphaerocleptes neraudeaui n. gen. et sp., and Nucifrangibulum carentonensis n. gen. et sp. A new bethylid wasp is also described but left in open nomenclature. These findings are the first records of the subfamilies Cleptinae and Bethylinae in these deposits and time interval. The implications of these discoveries, and the features shared with previously known taxa are discussed. 相似文献
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Four new genera and five new species of Archegocimicidae are described from the Lower Cretaceous of England: namely Mortalia martini gen. et sp. nov., Tyrion lannister gen. et sp. nov., T. cersei sp. nov., Stannis baratheon gen et sp. nov., Daenerys khaleesi gen. et sp. nov. A transitional position of the complex between Asian Late Jurassic and Early Cretaceous entomofaunas is indicated by this new material. 相似文献
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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. 相似文献
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《Proceedings of the Geologists' Association. Geologists' Association》2021,132(5):597-604
Christophus myanmarensis gen. et sp. nov., Christophus ohmkuhnlei gen. et sp. nov., and Mintara parva gen. et sp. nov., three new species and two new genera of belytine wasps (Diapriidae: Belytinae) are described and figured from males preserved in mid-Cretaceous Kachin (Burmese) amber. These new fossils enrich the fossil record of Cretaceous diapriids, summarized here, demonstrating the diversity of the family before the K/Pg extinction and suggesting an older origin for the family. 相似文献
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Two new genera and two new species of fossil Throscidae: Potergosoma gratiosa gen. et sp. nov. and Rhomboaspis laticollis gen. et sp. nov. are described from the Lower Cretaceous Lebanese amber and are compared with extant and extinct genera. The described amber inclusions are the oldest known representatives of the family Throscidae. Some hypotheses on the phylogeny of the family Throscidae and the position of it in the superfamily Elateroidea are discussed. 相似文献
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Early Cretaceous elasmobranchs still are very insufficiently known despite all progress that has been accomplished in recent years. Here, a small elasmobranch assemblage is presented from the Valanginian of Austria that contributes significantly to a better understanding of early Cretaceous elasmobranch diversity. The new assemblage comprises two new carcharhiniform sharks, Altusmirus triquetrus gen. et sp. nov. and Fornicatus austriacus gen. et sp. nov., a new orectolobiform shark, Similiteroscyllium iniquus gen. et sp. nov., and a galeomorph shark tooth of uncertain affinities. The recent identification of Similiteroscyllium gen. nov. has shown that it has strong similarities with Ornatoscyllium rugasimulatum from the Lower Cretaceous of France. Significant differences of the tooth morphology of O. rugasimulatum and the type specimen O. freemani justify full reconsideration of the systematic position of O. rugasimulatum and require it to be reassigned to Similiteroscyllium gen. nov. described in this paper. The new assemblage described here, and those from the Valanginian of France and Poland comprising 30 additional taxa, indicates that Early Cretaceous elasmobranch diversity was significantly higher than previously assumed. Consequently, the supposed diversity decline of elasmobranchs across the Jurassic-Cretaceous boundary represents a collecting bias rather than a real pattern. 相似文献
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New lacewings (Insecta: Neuroptera) from the Lower Cretaceous Wealden supergroup of Southern England
James E. Jepson Vladimir N. Makarkin Edmund A. Jarzembowski 《Cretaceous Research》2009,30(5):1325-1338
Eight new genera and thirteen new species of lacewings (Neuroptera) are described from the Lower Cretaceous Wealden Supergroup, Weald Sub-basin: Principiala rudgwickensis sp. nov. (Ithonidae), Stenomylina medialis gen. et sp. nov., Protosmylina bifasciata gen. et sp. nov. (Osmylidae), Cretapsychops corami gen. et sp. nov., Micropsychops parallelus gen. et sp. nov., Valdipsychops logunovi gen. et sp. nov., V. brigidae gen. et sp. nov., V. maculosus gen. et sp. nov., V. proudlovei gen. et sp. nov., V. minimus gen. et sp. nov., Psychopsites rolandi gen. et sp. nov. (Psychopsidae), Actinophlebioides valdensis gen. et sp. nov. and Protohemerobius perexiguus gen. et sp. nov. (Neuroptera familia incertae sedis). Psychopsidae are shown to dominate the neuropteran fauna, while the presence of Brongniartiellidae has not been confirmed in the Wealden, due to previously thought representatives of this family being in fact psychopsids. This is the first fossil record of Ithonidae and Osmylidae in Britain. The range of Kalligrammatidae has been extended in the Cretaceous of Britain from the mid-Valanginian to early Barremian. 相似文献
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Situated at the easternmost area of the Late Mesozoic Jehol Biota, China, abundant fossils, including invertebrates, vertebrates and plants, were collected from the Early Cretaceous Yingzuilazi Formation of the Baishan Basin, southeastern Jilin. The faunal remains from this formation distinctly belong to the Early Cretaceous Lycoptera–Ephemeropsis–Eosestheria assemblage of the Jehol Biota. Based on the gross leaf morphology and epidermal structures, two new species and one indeterminate species of genus Solenites(Czekanowskiales), S. baishanensis sp. nov., S. gracilis sp. nov. and S. sp. are described in this paper. This is the first fossil plant of Czekanowskiales reported from this new fossil locality of the easternmost area of the Late Mesozoic Jehol Biota, China. The new discovery contributes to improve our knowledge for understanding of leaf morphology, epidermal characters and diversity of this genus during the Early Cretaceous time, and extends geologic and geographic distribution of Solenites in northern China and Eurasia. Along with consideration of associated plant and faunal assemblages and sedimentology, we suggest that the regional climate was warm and moderately humid with seasonal temperature and precipitation variations in warm–temperate zone during the Early Cretaceous. 相似文献
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New Mesozoic Mesopsychidae(Mecoptera)from Northeastern China 总被引：2，自引：2，他引：0
<正>The Mesozoic family Mesopsychidae Tillyard,1917 presently consists of seven described genera and 13 species from the mid-Triassic to the Early Cretaceous of Australia,South Africa and Eurasia.In the present paper one new genus and three new species of fossil mesopsychids are described that add significant distributional and stratigraphic extensions to the family.This finding documents the first formal record of fossil Mesopsychidae in China.Both Lichnomesopsyche gloriae gen.et sp.nov.and L.daohugouensis gen.et sp.nov. were found from the Middle Jurassic Jiulongshan Formation of Inner Mongolia,whereas Vitimopsyche kozlovi sp. nov.,of mid Early Cretaceous age,was collected from the Jehol Biota of northern Hebei Province.This new,well-preserved material from China reveals complete and previously unknown body features,including head, antennae,mouthparts,legs and abdomen.The delicate and long proboscides of these new taxa indicate that they were feeding on externally exposed,nutrient-rich fluids of gymnospermous ovulate fructifications,and incapable of piercing surface epidermis-attributable principally to the absence of stylets.These proboscides originated, perhaps multiply,among basal Mecoptera and are functionally and structurally convergent with equivalent mouthparts borne by fossil and extant Diptera,Lepidoptera,Neuroptera and Coleoptera. 相似文献
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The Early Cretaceous Jehol Biota, one of the most important Mesozoic lagerstätten in East Asia, is especially well-known for occurrences of fossil feathered dinosaurs and early angiosperms. However, the terrestrial biodiversity, especially the fossil wood record, is poorly known. In this study, several structurally preserved coniferous wood specimens from the Lower Cretaceous Yixian Formation are investigated, based on collections from the Heichengzi Basin in Beipiao of western Liaoning, Northeast China. Four species referred to four genera of fossil wood are described, including Taxodioxylon heichengziense sp. nov., Thujoxylon beipiaoense sp. nov., Sciadopityoxylon liaoningense Ding and Protocedroxylon shengjinbeigouense sp. nov. These new records enlarge the fossil wood diversity of the Yixian Formation up to 10 species in 9 genera, and provide further insights into the forest vegetation composition of the Early Cretaceous Jehol Biota. Systematic analysis of the floral constitution indicates that the petrified forests of the Yixian Formation are dominated by conifers, represented by Araucariaceae, Podocarpaceae, Sciadopityaceae, Pinaceae and Cupressaceae in the western Liaoning region. Palaeoclimatical analysis of the fossil wood assemblage implies that the western Liaoning region was dominated by a cool temperate, wet and seasonal climate with variable interannual water supply in the western Liaoning region during the Early Cretaceous. 相似文献
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Edmund A. Jarzembowski B. Wang 《Proceedings of the Geologists' Association. Geologists' Association》2019,130(6):673-676
Mayflies are very rare in the British fossil record. The first nymph to be found, Schistonotorum wallisi gen. et sp. nov., is described from the non-marine Lower Cretaceous of southeast England. This Early Barremian find is from the Upper Weald Clay Formation at Smokejacks brickworks, Surrey. It is preserved as an adpression in concretionary sideritic ironstone from the upper insect bed exposed in the northeast face of the pit. The palaeoecological significance of this record is discussed. 相似文献
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The Soritoidea (Foraminifera) represent an important component of Cenomanian microfossil assemblages of the central and southern Tethyan carbonate platforms and are widely used as biostratigraphic markers. In this paper a new taxon, Fissumella motolae n. gen. n. sp., is described from the Cretaceous carbonate platform facies of central and southern Italy. It is characterized by its small size, planispiral-involute arrangement of chambers, fissure-shaped single aperture and few and short radial septula subdividing the marginal lumen of the chambers. Fissumella motolae n. gen. n. sp. represents the first soritoidean in the fossil record showing internal subdivisions of the chamber lumen. Carbon isotope stratigraphy supports an earliest Albian age for this significant step in the evolution of the superfamily Soritoidea. The new subfamily Fissumellinae is established for soritoidean foraminifera with planispiral-involute lens-shaped shells, single aperture and chamber lumen subdivided by few and short septula. 相似文献