New species of polychaetous annelids
in the collection of the American Museum of Natural History, from Puerto Rico, Florida, Lower California, and British Somaliland.
The tube-building serpulid polychaete Hydroides elegans (Haswell, 1883) serves as a useful model to study the molecular underpinnings of annelid
However, the phylogenetic topology of annelids
remains problematic (Rousset et al., 2007; Struck et al, 2008; Struck, 2011).
They possess sensory papillae, pigmented ocellus, tactile spines around the mouth, tactile papillae on the body surface and eyes with structural features that remind those of the annelids
more than the ocellus of the arthropod; some species have a lens and a cup composed of receptor neurons, each one having a photoreceptor process (Bullock and Horridge 1965).
This structure seems to lack the artifacts caused by deep-sea sampling methods, because the structure of membranes, nuclei, and fibers of the scaleworms can be compared to those of well-fixed annelid
species (Hartline and Kong, 2009).
Descriptions of new species and new generic records of Polychaetous annelids
from California of the families Glyceridae, Eunicidae, Stauronereidae, and Opheliidae.
Our first objective was to examine the generality of metatrochal arrest in larval annelids
and non-arrest in larval molluscs during prototrochal beat.
Histidine: A novel antimicrobial peptide containing bromotryptophan constitutively expressed in the NK cells-like of the marine annelid
, Nereis diversicolor.
Live foods like nematodes and annelids
which are widely used in aquarium fish maintenance and production are important alternatives with their ease of production and low costs.
All that the prints suggest was they were formed by some kind of bilaterian animal which had multiple paired appendages, like arthropods and annelids
, to raise its body above the water-sediment interface.
"At least three living groups of animals have paired appendages (represented by arthropods such as bumblebees, annelids
such as bristle worms, and tetrapods such as humans).
from the Caribbean Coast of Colombia
The purpose of this study is to determine if there have been changes in the settlement of larval polychaetous annelids
on suspended wooden test panels in Los Angeles Harbor since 1950-1951 (Reish 1971b).
, including marine worms, segmented worms and leeches have their blood green.
The most relatively represented among these groups are bivalve mollusks (27.27%), gastropod mollusks (15.91%), annelids
(9.09%), and nematodes (9.09%).