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

Pan, Z., Zhu, M., Zhu, Y. &amp; Jia, L., August 2017. A new antiarch placoderm from the Emsian (Early Devonian) of Wuding, Yunnan, China. <i>Alcheringa 42</i>, 10–21. ISSN 0311-5518. <i>Wufengshania magniforaminis</i>, 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 <i>Wufengshania</i> 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 <i>Dianolepis</i> and the Bothriolepididae. <i>Luquanolepis</i>, 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. <i>Zhaohui Pan* [</i>[e-mail]<i>], Min Zhu* [</i>[e-mail]<i>], You’an Zhu</i>^<i>†</i><i>[</i>[e-mail]<i>]</i> and <i>Liantao Jia [</i>[e-mail]<i>] Key Laboratory of Vertebrate Evolution and Human Origins of Chinese Academy of Sciences, Institute of Vertebrate Paleontology and Paleoanthropology, Chinese Academy of Sciences, PO Box 643, Beijing 100044, PR China. *Also affiliated with University of Chinese Academy of Sciences, Beijing, 100049, PR China.</i> ^<i>†</i><i>Also affiliated with Uppsala University, PO Box 256, 751 05 Uppsala, Sweden.</i>

潘(Z.), 朱(M.), 朱(Y.) 与 贾(L.)，2017年8月。《产自中国云南武定早泥盆世艾姆斯期的一种新反甲类盾皮鱼（antiarch placoderm）》。载于《Alcheringa》第42卷，第10–21页。ISSN 0311-5518。

本文记述了真反甲亚目（Euantiarcha，盾皮鱼纲（Placodermi）：反甲亚纲（Antiarcha））一新属新种大孔武定鱼（Wufengshania magniforaminis），其化石产自中国西南云南省武定的晚艾姆斯期（早泥盆世（Early Devonian））地层。归入本种的标本保存在黑色页岩（black shales）中，呈三维立体保存状态，可通过高分辨率计算机断层扫描（computed tomography）重建其解剖学细节。该新真反甲类的鉴别特征包括：硕大的眶孔（orbital fenestra）、环绕眶孔的拱形外骨骼带（exoskeletal band），以及颅顶（skull roof）发育的骨化颈区（obtected nuchal area）。

研究团队采用修正后的反甲类数据集（包含44个类群（taxa）与66个性状（characters））开展最大简约法系统发育分析（maximum parsimony analysis），结果显示新属武定鱼属（Wufengshania）gen. nov.隶属于沟鳞鱼科（Bothriolepididae），该科的鉴别特征为：眶下感觉管（infraorbital sensory canal）在侧片（lateral plate）上分叉，以及颈板（nuchal plate）具有眶面（orbital facets）。新的系统发育分析支持滇鱼属（Dianolepis）与沟鳞鱼科构成姊妹群关系（sister group relationship）。同期产自该新类群邻区的禄劝鱼属（Luquanolepis）被归入星鳞鱼亚目（Asterolepidoidei），代表了该亚目最基部且最古老的成员。

作者及单位信息：
潘昭辉* [[e-mail]]、朱敏* [[e-mail]]、朱友安^† [[e-mail]]、贾连涛 [[e-mail]]
中国科学院脊椎动物演化与人类起源重点实验室，中国科学院古脊椎动物与古人类研究所，北京邮政信箱643，100044，中华人民共和国。
* 同时隶属于中国科学院大学，北京100049，中华人民共和国。
^† 已故，同时隶属于瑞典乌普萨拉大学，Box 256，751 05乌普萨拉，瑞典。