A possible Early Cambrian chordate

Article Abstract:

A study shows that the cephalochordate Yunnanozoon lividum found in Yunnan, China, is a 525-million-year-old Early Cambrian chordate that belongs to the Chengjiang fauna. This is confirmed by the presence of a notochord and an expanded filter-feeding pharynx which bears an endostyle. The metameric gonads and an anteriorly prolonged notochord are important characteristics of this cephalochordate. The cephalochordates and the craniates have segmented musculature and metameric branchial arches in common.

Research, Paleontology, Protochordates, Cambrian period

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Early Homo and associated artefacts from Asia

Article Abstract:

The excavation at Longgupo cave in 1988 yielded two hominid dental fragments and two stone artifacts. Longgupo dentition is more primitive than that of the Asian Homo erectus. The diverse Plio-Pleistocene fauna in Longgupo region indicate the early arrival of the genus Homo in Asia. The hominid species may have come to Asia as early as two Myr. The study of the finds reveals important information on the early human settlements in Asia.

China, Antiquities, Excavations (Archaeology)

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Early ant plagues in the new world

Article Abstract:

Plague ants, particularly the Hispaniolan plague ant, are identified as having a painful sting and able to survive in the roots of trees and shrubs, in highly populated areas. This type of ant fauna are found in the West Indian part and are identified as the tropical fire ant called 'Solenopsis geminata'.

Ants, Fire ants

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