门: 古虫动物门
纲: 古虫纲
目: 未定
科: 地大动物科
属：地大动物属
种: 郝氏地大动物
描述:
身体由两部分构成，角质化保存，前体分节，口部较大，腹缘平坦，向后身体变宽。前体与后体被一个窄缩的区域分开。前体每侧具有五个鳃兜。后体由七个体节组成，从两个方向逐渐变尖细，最后端为圆形。
Phylum: Vetulicolia Shu et al., 2001
Class: Vetulicolida Chen & Zhou, 1997
Order：uncertain
Family: Didazoonidae Shu & Han, 2001
Genus：Didazoon Shu & Han, 2001
Specie: Didazoon haoae Shu & Han, 2001
Description:
Bipartite, cuticularized body, anterior segmented region and voluminous mouth, ventral margin flattened, widens posteriorly. A prominent constriction separates dorsal region of anterior from posterior section. Five gill ports have been identified on either side of the anterior section. The latter, composed of seven segments, tapers in both directions, with rounded posterior termination.
时代：寒武系第二统第三阶
主要产地: 中国昆明大板桥地区
Age: Cambrian Series 2 Stage 3
Principal localities: Dabanqiao area, Kunming, China
Shu D.G. et al. 2001. Primitive deuterostomes from the Chengjiang Lagerstätte (Lower Cambrian, China). Nature, 414: 419-424.
McMenamin M.A.S. 2019. Cambrian Chordates and Vetulicolians. Geosciences, 9, 354.
裴文瑞. 2021. 寒武纪早期澄江生物群古虫动物门口部结构新知. 西北大学.