APHOTOMARINE

An educational resource dedicated mainly to the photography
and diversity of marine life that can be found in coastal waters
and intertidal areas of Great Britain and Ireland by David Fenwick.

A-P-H-O-T-O Wildlife Stock Image Library
Lineus clandestinus Krämer, Schmidt, Podsiadlowski, Beckers, Horn & Von Döhren, 2016
Scroll down and rollover titles to change screen image or click on title to view image.
Lineid ribbon worm
Lineus clandestinus
- worm 1

Lineid ribbon worm
Lineus clandestinus
- dorsal view worm 1

Lineid ribbon worm
Lineus clandestinus
- dorsal view anterior 1

Lineid ribbon worm
Lineus clandestinus
- dorsal view posterior 1

Lineid ribbon worm
Lineus clandestinus
- ventral surface showing luminescent ventral fold 1

Lineid ribbon worm
Lineus clandestinus
- lateral view middle 1

Lineid ribbon worm
Lineus clandestinus
- lateral view middle 2

Lineid ribbon worm
Lineus clandestinus
- habitat / location 1

Specimen above was found under a rock on the middleshore at Chimney Rocks, Penzance, Cornwall, 25.03.15.

Lineus clandestinus was found with both Lineus ruber and Lineus viridis under rocks on the shore at Chimney Rocks, Penzance.

Patrick Beckers who co-authored the paper 'Unravelling the Lineus ruber / viridis species complex (Nemertea, Heteronemertea) commented on the images of this specimen and stated it looked like Lineus clandestinus and he was sure the species would likely be found in the UK.

The morphological difference between this species and Lineus viridis and L. ruber is slight. Only some males of Lineus clandestinus can be morphologically identified, they have a characteristic luminescent ventral fold on the ventral surface. Lineus ruber and Lineus viridis do not have a luminescent ventral fold.

All green specimens will be Lineus viridis. Specimens that are green and red are likely Lineus ruber or Lineus clandestinus but may only be reported as Lineus clandestinus if a specimen with a lumiscent ventral fold is found and this means specimens have to be taken away from the shore and looked at using a microscope, with the characteristic ventral fold photographed as evidence. DNA sequencing can also be used to determine the species.

First UK record
Lineus clandestinus. Chimney Rocks, Penzance, Cornwall. SW47522985. 25.03.15. David Fenwick.

Further specimens will be looked for and a voucher specimen will be collected and send for the collection at the Natural History Museum.

Lineus clandestinus Lineidae Ribbon Worm marine worm images
The main objective of this website is in furthering environmental awareness and education through the medium of photography. To increase awareness and access to the wildlife of the region and help
people find and identify it. Sometimes the difference between species is obvious but many species can only be determined by observing microscopic characteristics that are specific to any one species.