Search results
Results from the WOW.Com Content Network
Some annelids also have oblique internal muscles that connect the underside of the body to each side. [23] The setae ("hairs") of annelids project out from the epidermis to provide traction and other capabilities. The simplest are unjointed and form paired bundles near the top and bottom of each side of each segment.
A chaeta or cheta (from Ancient Greek χαίτη (khaítē) 'crest, mane, flowing hair'; pl. chaetae) is a chitinous bristle or seta found on annelid worms, although the term is also frequently used to describe similar structures in other invertebrates such as arthropods.
Setae on the foreleg of a mayfly. Annelid setae are stiff bristles present on the body. They help, for example, earthworms to attach to the surface and prevent backsliding during peristaltic motion. These hairs make it difficult to pull a worm straight from the ground. Setae in oligochaetes (a group including earthworms) are largely composed of ...
The spines, or setae, [5] on the scaled back of the sea mouse are one of its unique features. Normally, these have a deep red sheen, warning off predators, but when the light shines on them perpendicularly, they flash green and blue, a "remarkable example of photonic engineering by a living organism".
Lamellibrachia luymesi is a cold seep tube worm that reaches lengths of over 3 m and may be the most long-lived annelid, being over 250 years old. A still unclassified multilegged predatory polychaete worm was identified only by observation from the underwater vehicle Nereus at the bottom of the Challenger Deep , the greatest depth in the ...
Headlobe with four or (?) two eyes, a tentacle, two antennae, and two palpi. The first segment of body provided with four cirri on each side; the succeeding segments with a cirrus on each side. Body nearly as broad as long. Branchiae placed on each segment, on each side of body, disposed in a fan-shaped row of flat setae or paleae.
This is a list of the Annelida recorded from Ireland. ... Papillated body and cross-barred setae. Flabelligera, Diplocirrus, Brada. 4 species including
An image plate showing the different anatomical features (dashed outline) of a representative annelid parapodium. Parapodium is from Lepidonotus oculatus and is a Museums Victoria specimen. Microscope photograph of a parapodium from a specimen of Arctonoe sp. showing the internal acicula that support the two lobes of the parapodium. This ...