Definition: Egg laying; producing eggs that are laid and hatch externally (Lincoln et al., 1998).
Attribution: Lincoln, R., Boxshall, G. & Clark, P., 1998. A dictionary of ecology, evolution and systematics (2nd ed.). Cambridge: Cambridge University of Press.
Definition: Repeated, thickened, raised structures on the shell or carapace surface, less than the thickness of the shell/carapace and covering a small area of it. Thickenings can be either radial, comarginal, axial or spiral.
Definition: Salts and esters of phosphoric and oligophosphoric acids and their chalcogen analogues. In inorganic chemistry, the term is also used to describe anionic coordination entities with phosphorus as central atom.