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Cystophormis brevispina group
Petrushevskaya, 1975
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Description - Add description
?Cystophormis brevispina
Description. Cephalis strongly compressed, cap partially embedded in thorax, with a few small circular pores. Thorax not flared, centally inflated, with medium circular pores arranged in staggered vertical rows. Bars medium to wide, of moderate thickness. Some specimens have vertical ribs between pore rows. Thorax terminated by circular opening at base of thorax approximately same diameter as cephalis, surrounded by a hyaline peristome. Outline of shell is smooth. The photographs in Petrushevskaya (1975) are too blurred to permit definite comparisons.
Occurrence: In Sections 105-647A-14, CC and -13, CC (early Miocene). | | | | | |
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