门: 软体动物门
纲: 软舌螺纲
目: 直管螺目
科: 三槽螺科
属：三槽螺属
种: 三槽螺
锥形矿化螺壳，断面呈近三角形。背侧具二个纵脊。腹侧扁平，略凸。口盖扁平，近三角形或心型。扇状排列的触手结构，可在口盖腹部边缘内外可以自由伸缩。
Phylum:Mollusca
Class: Hyolitha Marek, 1963
Order: Orthothecida Marek, 1966
Family: Triplicatellidae in Liu et al., 2020
Genus：Triplicatella Conway Morris in Bengtson et al. 1990
Specie: Triplicatella opimus (Yu, 1974)
The conch is cone-shaped with subtriangular cross-section, and strongly mineralized. Dorsum bears two crests separated by deep carina tapering from apex to aperture, and ventral side appears flattened and slightly convex with a curved ventral margin. The operculum is flat, subtriangular and cap-shaped. Three shorter, divergent folds are present on the posterior (dorsal) side of the operculum. The pharynx and tentaculate structure remain in the central position of the operculum.
时代：寒武纪，第二统，第三阶
主要产地: 云南地武定县筇竹寺组
Age: Cambrian, Series 2, Stage 3
Principal localities: The Qiongzhusi Formation in Wuding county, Yunnan, China
Liu, F. et al. 2020. Are hyoliths Palaeozoic lophophorates? National Science Review. 7(2):453–469.
Liu, F. et al. 2020. Revision of Triplicatella (Orthothecida, Hyolitha) with preserved digestive tracts from the early Cambrian Chengjiang Lagerstätte, South China, Historical Biology.