门: 腕足动物门
纲: 舌型贝纲
目: 舌型贝目
科: Eoobolidae
属：Eoobolus
种: 马龙舌型贝
描述:
贝壳小，双凸型壳瓣，壳面发育有辐射状纹饰，壳的前端有粗的瘤点状装饰。腹壳向末端逐渐收缩，具尖角。腹壳假绞合面高，外边缘由前向后膨大。类假三角板未成熟期窄沟状。背壳轮廓为圆形或椭圆形。背壳假绞合面很低，中央有一细沟。肉茎长，具有环纹。
Phylum: Brachiopoda Schindewolf, 1955
Class: Lingulata Gorjansky & Popov, 1985
Order: Lingulida Waagen, 1885
Family: Eoobolidae Holmer, Popov & Wrona, 1996
Genus：Eoobolus Matthew, 1902
Specie: Eoobolus malongensis (Rong, 1974)
Description:
Shell ventro-biconvex, ornamented with radiating trails of pustules; Ventral valve acuminate, with apical angle; ventral pseudointerarea close to orthocline, triangular with prominent deep, parallel-sided pedicle groove; dorsal valve rounded oval in outline; dorsal pseudointerarea with broad, shallow and narrow, almost parallel-sided median groove; Pedicle densely annulated.
时代：寒武纪，第二统，第四阶
主要产地: 云南东部，包括昆明的大摩峪和高娄房段，武定县的石江郡和沙坡山段，以及马龙县的坎福清段。
Age: Cambrian, Series 2, Stage 4
Principal localities: Eastern Yunnan, comprising the Damoyu and Gaoloufang sections in Kunming, the Shijiangjun and Saposhan sections in Wuding county, and the Kanfuqing section in Malong county.
Zhang, Z.F. et al. 2005. Morpho-anatomical differences of the Early Cambrian Chengjiang and Recent lingulids and their implications. Acta Zoologica (Stockholm), 86, 277–288
Zhang, Z.F. et al. 2020. The oldest ‘Lingulellotreta’ (Lingulata, Brachiopoda) from China and its phylogenetic significance: integrating new material from the Cambrian Stage 3–4 Lagerstätten in eastern Yunnan, South China. Journal of Systematic Palaeontology.