<p><em>Facelina bostoniensis</em> (Couthouy, 1838)</p>
Photographer / copyright holder
Distribution and status
Ecology and behaviour
- Usually iridescence on cerata and, sometimes, on head and body, occasionally not.
- Cerata usually neatly swept back, each group only slightly overlaps the next behind.
- Rhinophore lamellae alternate complete/incomplete disk.
- Propodial extensions shorter and stouter than on F. bostoniensis.
- White pigment splashes down front of cerata.
Facelina dubia (EML) Very similar to F. bostoniensis
- Smooth rhinophores lack lamellae.
- White pigment flecks on head and oral tentacles.
- In British & Irish waters, so far only recorded in Lough Hyne in SW Ireland.
Key identification features
- Cerata long, linear, rather untidy and lack iridescence . (Occasionally, a small amount of iridescence on the head or oral tentacles; very rarely all over cerata).
- No white pigment splashes down cerata, apart from small patch near top . (Sometimes a minute white spot or two on front of cerata.)
- Rhinophore lamellae all complete disks.
- Slender sickle-shape propodial tentacles .
Taxon version key
Body (excluding appendages)