This group of species was originally classified under Calyptraea (Sigapatella) by Lesson in 1830. In 1990 the subgenus was elevated to the rank of genus as Sigapatella by Beu et al.[3] and confirmed in 2000 by Camacho et al. (2000) [4]
Description
The oval shell has a lateral
apex. The interior plate has a submarginal axis. The free margin is concave.[5]
^A. G. Beu, P.A. Maxwell, and R.C. Brazier. 1990. Cenozoic Mollusca of New Zealand. New Zealand Geological Survey Paleontological Bulletin 58
^H. H. Camacho, J. O. Chiesa, S. G. Parma and C. J. Rio. 2000. Invertebrado marinos eocenos de los cerros Palique y Castillo, subdoeste de la provincia de Santa Cruz, Argentina. Ameghiniana 37(1):59-72
^G.W. Tryon, Manual of Conchology vol. VIII p. 103; 1886
^H. H. Camacho, J. O. Chiesa, S. G. Parma and C. J. Rio. 2000. Invertebrado marinos eocenos de los cerros Palique y Castillo, subdoeste de la provincia de Santa Cruz, Argentina. Ameghiniana 37(1):59-72
This group of species was originally classified under Calyptraea (Sigapatella) by Lesson in 1830. In 1990 the subgenus was elevated to the rank of genus as Sigapatella by Beu et al.[3] and confirmed in 2000 by Camacho et al. (2000) [4]
Description
The oval shell has a lateral
apex. The interior plate has a submarginal axis. The free margin is concave.[5]
^A. G. Beu, P.A. Maxwell, and R.C. Brazier. 1990. Cenozoic Mollusca of New Zealand. New Zealand Geological Survey Paleontological Bulletin 58
^H. H. Camacho, J. O. Chiesa, S. G. Parma and C. J. Rio. 2000. Invertebrado marinos eocenos de los cerros Palique y Castillo, subdoeste de la provincia de Santa Cruz, Argentina. Ameghiniana 37(1):59-72
^G.W. Tryon, Manual of Conchology vol. VIII p. 103; 1886
^H. H. Camacho, J. O. Chiesa, S. G. Parma and C. J. Rio. 2000. Invertebrado marinos eocenos de los cerros Palique y Castillo, subdoeste de la provincia de Santa Cruz, Argentina. Ameghiniana 37(1):59-72