Zhenyu Song

Yangtze University | yangtzeu · School of Geosciences

Amber first became relatively abundant and widespread in the geological record during the Cretaceous period. It originated often as copious resin production by a variety of incompletely understood coniferous trees, generally under humid climates, but not excluding seasonal aridity. Study of insect and other organic inclusions only commenced in the...

Archostemata are a notable element of Mesozoic insect faunas. Prior to the present study, a total of 35 species, including an indeterminate one, from 18 genera have been reported from Cretaceous amber. These are mainly ommatid and cupedid reticulated beetles, with only 3 species, including an indeterminate one, belonging to micromalthids. Most spec...

A rare archostematan beetle, Lepidomma beuteli sp. nov. (Insecta: Coleoptera: Archostemata), is described based on a well-preserved specimen from mid-Cretaceous Kachin amber. It is the fourth species of the genus from the same locality that can be distinguished from the other three congeners by its elongated scape, exposed neck and, especially, rid...

A rare archaic beetle, Mallecupes zhangi sp. n., (Insecta: Coleoptera: Archostemata: Cupedidae) is described based on a well-preserved male specimen from mid-Cretaceous Kachin amber. It is the fourth species of the genus from the same location that can be distinguished from the other 3 congeners based on the combination of rounded temples and finge...

The biodiversity changes of trilobites in the middle Yangtze region of South China in the Great Ordovician Biodiversification Event and the end-Ordovician mass extinction have been analysed. The Ordovician trilobites in this region originated in the early Tremadocian and radiated from the late Floian to the early Katian. Two peaks of diversity appe...

The evolution of Ordovician cephalopod diversity in the Middle Yangtze region of South China has been analysed. The cephalopods in this region appeared in the earliest Tremadocian, radiated in the Early–Middle Floian and Middle Ordovician, and went through an extinction period during the Late Katian and Hirnantian. The composition of the cephalopod...

The evolution of the Early–Middle Ordovician brachiopod diversity in the middle Yangtze region of South China has been analyzed. The brachiopods in this region originated in the early Tremadocian and radiated from the late Floian to the late Dapingian. The composition of rhynchonelliformean brachiopods underwent major changes in the late Floian, an...