04 Trivia monacha
1: posterior and usually largest of three pitch-brown/black dorsal marks on shell .
2: middle of three pitch-brown/black dorsal marks weakest on this specimen, but usually anterior mark is smallest (Forbes & Hanley, 1853); considerable variation in size and colour saturation.
3: pale, median, dorsal line marks meeting position of sides of expanded mantle; little pigmented shell deposited in slight gap between mantle sides.
4: whitish ribs have very slight pink tint where exterior mantle has deposited minimal amount of pigmented material.
Adult. Shell height 10.8 mm (longest dimension). Menai Strait. August 2010.
Full SPECIES DESCRIPTION: flic.kr/p/CGERbH
Sets of OTHER SPECIES:
www.flickr.com/photos/56388191@N08/collections/
04 Trivia monacha
1: posterior and usually largest of three pitch-brown/black dorsal marks on shell .
2: middle of three pitch-brown/black dorsal marks weakest on this specimen, but usually anterior mark is smallest (Forbes & Hanley, 1853); considerable variation in size and colour saturation.
3: pale, median, dorsal line marks meeting position of sides of expanded mantle; little pigmented shell deposited in slight gap between mantle sides.
4: whitish ribs have very slight pink tint where exterior mantle has deposited minimal amount of pigmented material.
Adult. Shell height 10.8 mm (longest dimension). Menai Strait. August 2010.
Full SPECIES DESCRIPTION: flic.kr/p/CGERbH
Sets of OTHER SPECIES:
www.flickr.com/photos/56388191@N08/collections/