门: 节肢动物门
纲: 类肢纲
目: 游楯目
科: 纳罗虫科
属：纳罗虫属
种: 刺状纳罗虫
描述:
发育良好一对复杂的树状分支物延伸至前背甲的面颊区域.
具有双形的纳罗虫；形态 A 带有边缘刺，前背甲具一对棘刺，后背甲具10 或 11 对侧棘刺和一对后棘刺；形态B 缺乏边缘刺；两种变体都具备相同的附肢和消化道； 触角后附肢的外肢呈桨状，边缘呈薄片状，具有刚毛。
Phylum: Arthropoda
Class: Artiopoda
Order: Nektaspida
Family: Naraoiidae
Genus: Naraoia
Specie: spinosa
Description:
Well-developed digestive system, the anteriormost pair complex arborescent branches extending to cheek areas of the anterior shield.
Naraoia with dimorphism; Morph A bearing marginal spines, one pair of genal spines in the anterior shield, ten or eleven pairs of lateral and one pair of posterior spines in the posterior shield. Morph B lacking marginal spines. Both morphs carying identical appendages and digestive tract. Exopods of post-antennal limbs paddle-like and fringed with lamellae and bristles.
时代：寒武系第二统第三阶
主要产地: 澄江生物群，中国，云南
Age: Cambrian Series 2 Stage 3
Principal localities: Chengjiang biota, Yunnan, China
Zhang X L, Shu D G, Erwin D H. Cambrian naraoiids (Arthropoda): morphology, ontogeny, systematics, and evolutionary relationships[J]. Journal of Paleontology, 2007, 81(sp68): 1-52.
Zhai D, Edgecombe G D, Bond A D, et al. Fine-scale appendage structure of the Cambrian trilobitomorph Naraoia spinosa and its ontogenetic and ecological implications[J]. Proceedings of the Royal Society B, 2019, 286(1916): 20192371.
Xian-Guang H, Siveter D J, Siveter D J, et al. The Cambrian fossils of Chengjiang, China: The flowering of early animal life[M]. John Wiley & Sons, 2017.