Aphids are marked by their high polymorphism, but species reported from the Early Cretaceous are known only from alate morphs. The discovery of an apterous adult morph in Lebanese amber and a larva of the same species...Aphids are marked by their high polymorphism, but species reported from the Early Cretaceous are known only from alate morphs. The discovery of an apterous adult morph in Lebanese amber and a larva of the same species are very important for the understanding of both the morphological and biological evolution of this insect group at the very early stage of development. Gondvanoaphis estephani new subfamily, new genus and species of the recent aphids family Thelaxidae is described. The characters of the new genus in respect to other genera placed in Thelaxidae are reviewed. The palaeoeeological and palaeogeographical data concerning Gondvanoaphis new genus are also discussed.展开更多
The present study describes a new genus and species Unicohormaphis sorini,which belongs to the subfamily Cerataphidinae.The contemporary distribution of aphids belonging to the Hormaphididae family is summarized and a...The present study describes a new genus and species Unicohormaphis sorini,which belongs to the subfamily Cerataphidinae.The contemporary distribution of aphids belonging to the Hormaphididae family is summarized and analyzed.According to the obtained data,the climate warming in Eocene was conducive to the expansion of the family over the areas of Europe.Subsequent climate changes,resulting from epeirogenic and orogenic movements towards the end of Eocene,led to a considerable cooling and drying of climate in the northern hemisphere.These processes contributed to the shrinking down of areas covered by subtropical forests,which constituted the habitat of Hormaphididae（Cerataphidinae）.Retaining their way of life,the Cerataphidinae were forced to limit their distribution,and the representatives of the family in Europe became completely extinct.展开更多
文摘Aphids are marked by their high polymorphism, but species reported from the Early Cretaceous are known only from alate morphs. The discovery of an apterous adult morph in Lebanese amber and a larva of the same species are very important for the understanding of both the morphological and biological evolution of this insect group at the very early stage of development. Gondvanoaphis estephani new subfamily, new genus and species of the recent aphids family Thelaxidae is described. The characters of the new genus in respect to other genera placed in Thelaxidae are reviewed. The palaeoeeological and palaeogeographical data concerning Gondvanoaphis new genus are also discussed.
文摘The present study describes a new genus and species Unicohormaphis sorini,which belongs to the subfamily Cerataphidinae.The contemporary distribution of aphids belonging to the Hormaphididae family is summarized and analyzed.According to the obtained data,the climate warming in Eocene was conducive to the expansion of the family over the areas of Europe.Subsequent climate changes,resulting from epeirogenic and orogenic movements towards the end of Eocene,led to a considerable cooling and drying of climate in the northern hemisphere.These processes contributed to the shrinking down of areas covered by subtropical forests,which constituted the habitat of Hormaphididae（Cerataphidinae）.Retaining their way of life,the Cerataphidinae were forced to limit their distribution,and the representatives of the family in Europe became completely extinct.
