67 Tonicella marmorea COMPARISON Lepidochitona cinerea

67 Tonicella marmorea COMPARISON  Lepidochitona cinerea

Intermediate valve iv of Lepidochitona cinerea. Length of live animal 16 mm. North Yorkshire. September 2014. Leg. Paula Lightfoot.
T. marmorea apophyses are short (anterior-posterior), wide and gently curved (see 61 Tonicella marmorea COMPARISON Boreochiton ruber ).
1: L. cinerea apophyses are gently curved.
T. marmorea jugal sinus (gap between apophyses) is about quarter width of one apophysis (see 61 Tonicella marmorea COMPARISON Boreochiton ruber ).
2 to 2: L. cinerea jugal sinus (gap between apophyses) is convex and about same width as one apophysis.

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