12 Bittium reticulatum. Spawn mass, diameter 3mm. Redrawn after Fretter and Graham (1962).
Spawn mass is laid on weed, stone or rock as a gelatinous cylinder about 25mm long, containing about 1000 ova. Uniquely among British prosobranch gastropods, it is wound in a tight spiral of two to four turns and up to 3mm diameter. The spiral can be wound clockwise or anti-clockwise. A single female may lay 10 000 ova in seven masses over a two week period.
Full SPECIES DESCRIPTION: flic.kr/p/RCFpWq
Sets of OTHER SPECIES:
12 Bittium reticulatum. Spawn mass, diameter 3mm. Redrawn after Fretter and Graham (1962).
Spawn mass is laid on weed, stone or rock as a gelatinous cylinder about 25mm long, containing about 1000 ova. Uniquely among British prosobranch gastropods, it is wound in a tight spiral of two to four turns and up to 3mm diameter. The spiral can be wound clockwise or anti-clockwise. A single female may lay 10 000 ova in seven masses over a two week period.
Full SPECIES DESCRIPTION: flic.kr/p/RCFpWq
Sets of OTHER SPECIES: