Helcionopsis is an extinct genus of paleozoic monoplacophoran in the family Tryblidiidae.
The generic name is from the external resemblance which the genus bear to the recent species of the genus Helcion in family Patellidae.
Species Species in the genus Helcionopsis include:Helcionopsis. The Paleobiology Database, accessed 25 August 2009. Helcionopsis radiatum (Lindström, 1884) Helcionopsis reticulatus Easton, 1943Easton W. H. 1943. The Fauna of the Pitkin Formation of Arkansas. Journal of Paleontology 17(2):125-154. Helcionopsis striata Ulrich, 1897Ulrich E. O. & Scofield W. H. 1897. The Lower Silurian Gastropoda of Minnesota. page 827, plate VXI, figure 29-30. Helcionopsis subcarinata Ulrich & Scofield, 1897Ulrich E. O. & Scofield W. H. 1897. The Lower Silurian Gastropoda of Minnesota. page 827-828, plate VXI, figure 28.
Shell description General form and position of apex is as in Tryblidium, from which Helcionopsis differ in having the surface marked by fine radiating striae. Muscular scars of this genus Helcionopsis unknown in 1897, when the genus was described.
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