门: 软体动物门
纲: 恐虾纲
科: 维瓦西亚虫科
属：维瓦西亚虫属
种：凤蝶维瓦西亚虫
描述:
全身长5-8毫米，巩膜前部有8排横排，无背刺。腹外侧巩膜是花苞状的，而其他巩膜是圆形的，大约是宽的两倍长。每一个腹侧侧巩膜完全重叠于它的后邻。前面一排的巩膜由两个双侧成对的莲座组成，其形态的变化与身体其他部位的巩膜相同:最腹侧的巩膜是花苞状的，而更背侧的巩膜是圆形的，偶尔不对称。口部有两到三排碳质牙齿。
Phylum: Mollusca
Class: Unranked clade halwaxiids
Family: Wiwaxiidae Walcott, 1911
Genus: Wiwaxia Walcott, 1911
Species: Wiwaxia papilio Zhang, Martin & Shu 2015
Description:
Wiwaxia papilio is 5–8 mm long, an anterior region of sclerites followed by eight further transverse rows, with no dorsal spines. Ventrolateral sclerites are siculate, whereas other sclerites are rounded and about twice as long as broad. Each ventro-lateral sclerite fully overlaps its posterior neighbour. The anterior row of sclerites is made up of two bilaterally-paired rosettes, across which the morphology of sclerites varies in the same fashion as it does elsewhere on the body: the most ventral sclerites are siculate, whereas the more dorsal sclerites are rounded and occasionally asymmetric. Mouthparts possess two to three rows of carbonaceous teeth.
层位：玉案山段筇竹寺组，寒武纪第2统第3阶，Eoredlichia-Wutingaspis带。
主要产地: 中国云南东部澄江生物群，昆明海口的尖山剖面。
Period: Cambrian Series 2, Stage 3, Eoredlichia-Wutingaspis Zone (ca. 518 million years ago).
Principal localities: Chengjiang Lagerstätte (Yu’anshan Member of the Chiungchussu Formation), Jianshan Section in Haikou, Kunming, eastern Yunnan Province, China.
Zhang, Z.F., Smith, M.R., Shu, D.G., 2019. New reconstruction of the Wiwaxia scleritome, with data from Chengjiang juveniles. Scientific Reports, 5: 14810.