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
Tetrastemma helvolum Bürger, 1895 ??? or similar species - A tetrastemmatid nemertean (Nemerteans)
Scroll down and rollover titles to change screen image or click on title to view image.
Tetrastemmatid nemertean
Tetrastemma helvolum ???
- dorsal view 1

Tetrastemmatid nemertean
Tetrastemma helvolum ???
- dorsal view 2

Tetrastemmatid nemertean
Tetrastemma helvolum ???
- with 0.1mm division rule 1

Tetrastemmatid nemertean
Tetrastemma helvolum ???
- under microscope 1

Tetrastemmatid nemertean
Tetrastemma helvolum ???
- microscope / anterior 1

Tetrastemmatid nemertean
Tetrastemma helvolum ???
- microscope / anterior 2

Tetrastemmatid nemertean
Tetrastemma helvolum ???
- microscope / side of head 1

Tetrastemmatid nemertean
Tetrastemma helvolum ???
- stylet 1

Tetrastemmatid nemertean
Tetrastemma helvolum ???
- stylet 2

Tetrastemmatid nemertean
Tetrastemma helvolum ???
- stylet 3

Tetrastemmatid nemertean
Tetrastemma helvolum ???
- proboscis 1

Numerous specimens found in a sample of algae collected from the extreme lowershore at Wherry Rocks, Penzance, Cornwall, 31.03.18.

The specimen on this page needs confirmation / verification, it's probably more important to record species like thia as Tetrastemma sp., and provide notes on the species or an image with the record so verification might be possible in the future. It is probably likely there are more species of Tetrastemma than are covered by current literature in the UK.

Of course here identification is based on morphological characteristics and the shape of the stylet. What is needed is a lot more sequencing of nemerteans in the UK to determine the species we have and their variabilty in terms of morphological characteristics, and for the purposes of recording.

Tetrastemma helvolum tetrastemmatid tetrastemmatidae Ribbon worm Nemertean 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.