Plumatella repens

Verder in Nederlands

  1. More information
  2. Photos
  3. Microscope photos and videos
  4. Statoblasts

Plumatella repens in hanging form provides a good view on the shared tube that houses the polypids. I made this picture of a colony growing below an underwater treestump that was standing at an angle. Please note the competition for space with the fresh water sponge. Earlier in the season (picture taken mid-august) a P. repens colony had grown on almost the same spot that was first surrounded and then overgrown by the sponge.

Plumatella repens hanging

The detail image below shows the polypid's horseshoe shape fairly clearly. Also statoblasts are seen in the shared tube.

Plumatella repens detail

Plumatella repens also grows in a 'fungoide' form. P. repens then forms polypide fields on a flat surface. In this growth form it is fairly easy to confuse P. repens with P. fungosa, but P. repens is more open - the polypids are not closely packed.
I made this image on the underside of a piece of wood that i had stuck into the ground at an angle before in order to make an artificial mini-reef for bryozoans.
This and the following pictures are not completely sharp - improved version will be made soon.

Plumatella repens fungoid form

This detail of an image of P. repens in fungoid form shows the open stryctyre and the tubelike cystids that are typical for the species.

Plumatella repens fungoid form detail

The following extreme detail shows the horseshoe shape of the polypid.

Plumatella repens polypide

This is how P. repens looks shortly after a disturbance has hit the colony, in this case a diver moving too abruptly. All polypids are retracted.

Plumatella repens retracted polypids

The following 6 photos are examples of P. repens colonies. Clik on a photo for a full size image.

P. repens colony example P. repens colony example
P. repens colony example P. repens colony example
P. repens colony example P. repens colony example

The edges of a P. repens colony are messy. On the right hand side another species of bryozo can be seen, probably F. sultana.

Plumatella repens colony edge