echinoid

The aim of this paper is merely give the histological description of the coexistence of male and female germ cells (gametes) in the same gonads of an adult specimen of Loxechinus albus, without conclusion about sexuality as is just one isolated phenomenon of ovotestis observed in this gonochoric echinoid, nonsignificant at a population scale; but is interesting and is important not to miss out this phenomenon, like L.

Development of nervous systems to metamorphosis in feeding and non-feeding echinoid larvae, the transition from bilateral to radial symmetry.

The rock-boring urchin (Echinometra lucunter) is a regular tropical echinoid characterized by the color of the test (or shell) and spikes ranging from dark tones to black.

Echinoid community structure and rates of herbivory and bioerosion on exposed and sheltered reefs.

Contradictory findings regarding behavioral cues, both among and within species and locales, make it difficult to develop a generalized model of echinoid aggregation and overgrazing.

The finding of the study indicated that D.setosum is a stenohaline echinoid that could not be able to survive and develop if the salinity range is less than28 or more than 37 ppt.

Efficiency of organic matter absorption by the tropical echinoid Diadema antillarum Philippi fed non-macrophytic algae.

Taxonomic significance of spine morphology in the echinoid genera Diadema and Echinothrix.

The northern limb of the syncline is accessible by vehicles along a dirt track around the western side of the jebel and has been a fruitful site for the collection of echinoid specimens by palaeontologists of the Natural History Museum, London.

Sea urchins belong to the class Echinoidea, one of four classes in the phylum Echinodermata, and here specialists describe echinoid species and represent them with images.

An echinoid fossil in the wall of <BBurberry's on Bond Street

Biology of the Echinoid, Tripneustesgratilla Fed the Seagrass, Halophilastipulacea in the Gulf of Aqaba, Jordan.