A new antiarch placoderm from the Emsian (Early Devonian) of Wuding, Yunnan, China

作者：Pan, Zhaohui^*; Zhu, Min; Zhu, You'An; Jia, Liantao

来源：Alcheringa, 2018, 42(1): 10-21.

DOI：10.1080/03115518.2017.1338357

• Antiarcha
• Placodermi
• Early Devonian
• HRCT scanning
• morphology

Wufengshania magniforaminis, a new genus and species of the Euantiarcha (Placodermi: Antiarcha), is described from the late Emsian (Early Devonian) of Wuding, Yunnan, southwestern China. The referred specimens were three-dimensionally preserved in black shales, allowing a high-resolution computed tomography reconstruction of anatomical details. The new euantiarch is characterized by a large orbital fenestra, an arched exoskeletal band around the orbital fenestra and a developed obtected nuchal area of the skull roof. Maximum parsimony analysis, using a revised data-set of antiarchs with 44 taxa and 66 characters, resolves Wufengshania gen. nov. as a member of the Bothriolepididae, which is characterized by the presence of the infraorbital sensory canal diverging on the lateral plate, and the nuchal plate with orbital facets. New analysis supports a sister group relationship between Dianolepis and the Bothriolepididae. Luquanolepis, a coeval euantiarch from the neighboring site of the new form, is referred to the Asterolepidoidei and represents the basalmost and earliest member of the Asterolepidoidei.

• 出版日期2018
• 单位中国科学院大学; 中国科学院古脊椎动物与古人类研究所