Phoronis psammophila - Horseshoe worm - Zandhoefijzerworm

Phoronis psammophila  Cori, 1889

(kind of) Horseshoe worm - Zandhoefijzerworm 

Zeelandbrug, the Netherlands, 28-8-2026. In vitro photo specimen A, diameter of shaft/trunk 0.4 mm, 29-8-2026.

Zeelandbrug, the Netherlands, 28-8-2026. In vitro photo specimen A, 31-8-2026.

Zeelandbrug, the Netherlands, 28-8-2026. In vitro photo specimen A, 31-8-2026.

Zeelandbrug, the Netherlands, 28-8-2026. In vitro photo specimen A, 29-8-2026.

Zeelandbrug, the Netherlands, 28-8-2026. In vitro photo specimen A, 29-8-2026.

Zeelandbrug, the Netherlands, 28-8-2026. In vitro photo, 9-9-2026.

Zeelandbrug, the Netherlands, 28-8-2026. In vitro photo of two disconnected lophophores ('heads'), 29-8-2026.

Zeelandbrug, the Netherlands, 28-8-2026. 

Zeelandbrug, the Netherlands, 28-8-2026. 

Zeelandbrug, the Netherlands, 28-8-2026. 

Zeelandbrug, the Netherlands, 28-8-2026. 

Zeelandbrug, the Netherlands, 28-8-2026. 

Zeelandbrug, the Netherlands, 28-8-2026. 

Zeelandbrug, the Netherlands, 28-8-2026. 

Zeelandbrug, the Netherlands, 28-8-2026. With Celtodoryx ciocalyptoides, Cylista troglodytes, Sepia officinalis and Ericthonius didymus.

Zeelandbrug, the Netherlands, 28-8-2026. With Halichondria panicea, Synarachnactis lloydii, Sabella pavonina, Sepia officinalis and Ericthonius didymus (and several other species).

Zeelandbrug, the Netherlands, 28-8-2026. With Cylista troglodytes and Ericthonius didymus.

Zeelandbrug, the Netherlands, 28-8-2026. In vitro photo of tubes, width 37 mm, 9-9-2026.

Zeelandbrug, the Netherlands, 28-8-2026. In vitro photo of detail of tubes (see previous photo), 9-9-2026.

Zeelandbrug, the Netherlands, 28-8-2026. In vitro photo of a complete specimen, diameter of shaft/trunk 0.4 mm, 9-9-2026.

Zeelandbrug, the Netherlands, 28-8-2026. In vitro photos of a specimen showing its very flexible ampulla (bottom end of the body), 15-9-2026.