Black tar sponge
Dercitus (Dercitus) bucklandi
- in crevice on overhang 2
Black tar sponge
Leuconia nivea
- in crevice on overhang 3
Black tar sponge
Dercitus (Dercitus) bucklandi
- close-up 1
Black tar sponge
Dercitus (Dercitus) bucklandi
- close-up 2
Black tar sponge
Dercitus (Dercitus) bucklandi
- microscope image of calthrop showing axial canal 1
Black tar sponge
Dercitus (Dercitus) bucklandi
- calthrops 0.1mm division rule 1
Black tar sponge
Dercitus (Dercitus) bucklandi
- microscope image of spicule / microscleres / toxa 1
Specimen typically found bridging a small crevice on an overhang on the extreme lowershore at Watermouth Cove Holiday Park (private beach), near Ilfracombe, Devon, 13.06.18.
This species is unlikely to be confused with any other species in the UK due to its colour although the grey Pachymatisma johnstonia can be found in crevices in similar habitats.