Long-proboscid zhangsolvid flies in mid-Cretaceous Burmese amber (Diptera: Stratiomyomorpha)

摘要

Zhangsolvidae is an extinct family of brachycerous flies with long proboscis that is known only from the Cretaceous. This family is considered a pollinator of Cretaceous gymnosperms. Two new species, Burmomyia rossi gen. et sp. nov. and Cratomyia zhuoi sp. nov., are described in mid-Cretaceous Burmese amber from the Hukawng Valley in northern Myanmar. An updated key to all known genera and species of Zhangsolvidae is also given. Our study suggests that zhangsolvids had a relatively high diversity in the mid-Cretaceous and reveals zhangsolvid lacked distinct sexual dimorphism. (C) 2019 Elsevier Ltd. All rights reserved.