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Bathysalenia granulosa (Woodward, 1856)

 

Members of the subfamily Saleniinae (Agassiz) (e.g. Salenia geometrica and Bathysalenia granulosus) are characterised by small tests, a fused apical disc, and a small, pronounced periproct Bathysalenia granulosus is distinguished from Salenia geometrica by the distinctly granular appearance of the apical disc, whereas that of B. granulosus has a smooth appearance.  Bathysalenia granulosus ranges from the Turonian to Campanian.

 

 A    BB

1).  Isolated tests; (A) adapical and (B) adoral views (both x9, Hope Gap, Lewes Nodular Chalk Formation (Beeding Beds)).  Both Randell Collection, (A) RR1523, (B) RR1525.

 

 

2).  Lateral (side) view of a complete test ( x9, Hope Gap, Lewes Nodular Chalk Formation (Beeding Beds), Randell Collection, RR1523).

 

     B

 3).  Large test resting on a fragment of inoceramid bivalve; (A) adapical and (B) lateral views (x6, Hope Gap, Lewes Nodular Chalk Formation (Beeding Beds), Randell Collection, RR1527).

 

A       B

4).  Broken tests exposing Aristotle's Lantern elements (both Hope Gap, Lewes Nodular Chalk (Beeding Beds), Randell Collection, (A) RR1500, (B) RR0255).; (A) a significant but mainly disarticulated portion of the lantern is retained within the test (x10); (B) a solitary hemi-pyramid is seen floating in the sediment fill of the test (x13).