11 Differentiation L. obtusata/L. fabalis

11 Differentiation L. obtusata/L. fabalis

Male L. obtusata.
Penis fallen away from body and twisted, so exposing many small mamilliform glands (1), enabling limit (2) of short, stout, triangular filament (3) to be discerned and confirmation of L. obtusata identification.
Shell height 12.9mm. Menai Strait, North Wales. September 2016.
Full account at: 02 Differentiation L. obtusata/L. fabalis

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