Plumatella fungosa

Verder in Nederlands
Nederlands

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

The yellowish color on many pictures is caused by peat coloring the water.

According to literature P. fungosa grows in fungoid or knoll shape and has closely packed zooids.

P. fungosa crust form P. fungosa bulbous form

I found P. fungosa in the same stream i found P. magnifica where it grew encrusting on the bridge support at a depth of about 20 cm and at the underside of a concrete beam.
As i took these pictures i had to lock my legs around a concrete bridge support in order to stay in place in the current.

Plumatella fungosa

The next picture illustrates how closely packed the P. fungosa zooids are.

Plumatella fungosa

To differentiate between P. fungosa and P. repens both are shown side by side
The P. fungosa tentacles are smaller and more slender as compared to the P. repens ones
In addition the P. fungosa colonies often have a greyish shine which the P. repens colonies lack.

P. fungosa P. repens
Plumatella fungosa Plumatella repens

Recently i found P. fungosa in a subsiduary stream to my favorite diving lake. If it has rained a significant current (1 - 2 m/s) occurs. The pictures below show colonies i found on branches of a tree that had fallen in to the water.
The righthand picture shows part of the polyps retracted. This was caused by a sudden movement from my side in combination with my camera being very close to the colony.

P. fungosa P. fungosa

Especially on the concrete walls of a 'under the road' construction i found significant numbers of P. fungosa colonies. On places where the concrete was irregular i found nice colonies, even close (10 cm) to the very silty bottom.

P. fungosa on concrete wall

This picture also shows that P. fungosa can grow in a more loose 'creeping' form. I have not found this any where in literature.

P. fungosa creeping on concrete wall

Closer inspection learned me that at the edge of bulbous colonies i could also find creeping extensions.

P. fungosa creeping at the edge of a colony

In more detail one can even see statoblasts in the colony tubes (top of picture).

P. fungosa creeping detail

This is a picture of the location where i found P. fungosa in crawling form, taken while floating in the water.
P. fungosa grows on the walls under the road. The colonies grew on both walls along almost the full length and from a few centimeters of the watersurface to almost the bottom.

wall wall

20 meter downstream a tree hangs partially in the water and on submerged branches P. fungosa grows in knoll shape (see pictures above). Also on other trees and bushes with submerged branches i found P. fungosa colonies in knoll shape.

Location P. fungosa in knoll form