Unknown 9. Family Unknown.

Unknown 9Unknown 9 SEM

Size under dissecting microscope: 190-210µm
Size under compound microscope: 190µm
This protoconch has short stretch of lineate sculpture at the axis of curvature which then spreads out into an area of interconnected reticulate sculpture that covers the proximal 1/3 of the shell. From this point a few lines extend toward the aperture, most stopping well short of it, but a few reaching all the way. The aperture is roughly circular and is only about 1/3 of the diameter of the shell. There appears to be a narrow aperture rim, surrounded by a wider region of stippling, possibly a continuation of the reticulate sculpture.
Pump EPR 1999-2000: Not collected on axis
Pump EPR 2004: Rare
Trap EPR 2004-2005: Not collected

Can be confused with

Unknown 7
Unknown 9 is most likely to be confused with Unknown 7, which has a similar type of sculpture. Unknown 9 is slightly larger and some of its lineate sculpture extends all the way to the aperture, whereas all five lines in Unknown 7 stop well short of the aperture. Unknown 7 is greater in height for its diameter than Unknown 9. The approximate height:diameter figures are 110:190µm for Unknown 9 and 125:180µm for Unknown 7.

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