张文堂教授是国际著名的三叶虫、叶肢介等节肢动物化石与寒武、奥陶纪地层专家 ,他曾任中国科学院南京地质古生物研究所第三研究室室主任 ,全国地层委员会奥陶系工作组组长 ,国际地层委员会寒武纪分会选举委员、名誉委员 ,伦敦国际动物命名理事会理事 International Trust forZ Professor Zhang Wentang is an internationally renowned trilobites, fronds and other arthropod fossils and Cambrian, Ordovician stratigraphic experts, he served as Nanjing Institute of Geology and Palaeontology, Chinese Academy of Sciences, the third director of the laboratory, the National Committee of Ordovician strata Chairman of the Working Group, Member of the Cambrian Sections of the International Stratigraphic Commission Elected Member, Honorary Member, Director, International Animal Names Council, London International Trust forZ