ribbon worm

Like other ribbon worms, this species is not divided into segments but is long, thin and contractile.

Collared cells are found in other animal groups, such as ribbon worms, suggesting this was the morphology of their last common ancestor.

The bootlace worm is in the phylum Nemertea or ribbon worms.

Later scientists suggested an affinity with the nemerteans (ribbon worms), but the evidence for this was somewhat inadequate.

The ribbon worm larvae invade their hosts when they are juveniles soon after settlement and become precociously mature within three weeks.

This means that the maximum number of ribbon worm larvae are available to invade the hosts when they are newly settled.

Once the algae and seaweed were gone, so too went the hermit crabs, ribbon worms and eels.

The Ribbon Worm Tidal Steps fills with water at high tide, creating homes for small marine life.

Other invertebrates include the Nemertea or ribbon worms, and the Sipuncula.

Gononemertes australiensis is a parasitic ribbon worm.

Nemertea is a phylum of invertebrate animals also known as ribbon worms or proboscis worms.

Emplectonema neesii is a species of ribbon worm in the phylum Nemertea.

Ribbon worms (Nemertea)

It co-exists with a parasitic ribbon worm, Gononemertes australiensis which lives in its digestive gland or body cavity.

Prostoma jenningsi is a species of ribbon worm known only from one site near Croston, Lancashire.

Currently these two phyla have been included in a larger group, the Lophotrochozoa, that also includes the annelids, the ribbon worms and several other phyla.

(lophotrochozoan bilaterians, such as flatworms, ribbon worms, lophophorates, and molluscs)

Examples range from the minute parasitic mesozoans to the larger bodied free-living phyla like ribbon worms, peanut worms and priapulids.

Worms vary in size from less than 1 mm (0.04 inch) in certain aschelminths to more than 30 m (100 feet) in certain ribbon worms.

But besides these are a multitude of unusual animals like lamp shells, peanut worms, moss animals, ribbon worms, beard worms and many others that lack common names.

The majority of enoplan ribbon worms are marine and benthic, but there are approximately 100 named and described species of pelagic nemerteans.

The Cambrian fossil, Amiskwia, has been interpreted as a nemertean based on its resemblance to some pelagic ribbon worms; however, this interpretation is disputed by many paleontologists.

Gibson, Ray (2002): The Invertebrate Fauna of New Zealand: Nemertea (Ribbon Worms).

Predatory invertebrates found in the vicinity of the Antarctic scallop include the gastropod Neobuccinum eatoni, and the ribbon worm Parborlasia corrugatus.

The Lophotrochozoa also include the Nemertea or ribbon worms, the Sipuncula, and several phyla that have a ring of ciliated tentacles around the mouth, called a lophophore.