| Size under dissecting microscope: 190-200µm Size under compound microscope: 190µm |
| Morphology: This is a rather fragile protoconch, generally found with at least the aperture damaged. It is very rounded in appearance, with regularly spaced lines extending about ¾ of the way to the aperture. There is some hint of sparse reticulate sculpture on the sides and base. The aperture is probably sinuous and we have seen no evidence of a rim. This protoconch resembles several in the family Skeneidae; for example, see Warén and Bouchet (1993, Fig. 23, A & C) for images of the protoconchs of Xyloskenea costulifera Marshall, 1988 from deep-sea wood falls and Ventsia tricarinata Warén and Bouchet, 1993, from the Lau Basin. |
| Frequency: Pump EPR 1999-2000: Rare Pump EPR 2004: Rare Trap EPR 2004-2005: Not collected |
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Unknown 8's sculpture and size are similar to that of Unknown 7. Unknown 7 has only five lines that are more widely spaced than those on Unknown 8. It is also shorter in height for its diameter than Unknown 8. The approximate height:diameter figures are 135:190µm for Unknown 8 and 125:180µm for Unknown 7. |
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