13 Differentiation L. obtusata/L. fabalis

13 Differentiation L. obtusata/L. fabalis

Male L. obtusata.
Even though in this image most diagnostic features are hidden, it can be seen that the fat swollen end of the penis is not a slender vermiform filament, so it is L. obtusata and not L. fabalis.
Shell height 10.5 mm. Menai Strait, North Wales. September 2016.
Full account at: 02 Differentiation L. obtusata/L. fabalis

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