optional/compulsory, single

—

Inside <scientificname> the scientific (latin) name of an animal, or plant is given.

Either <scientificname> (that's better :-) ) or <trivialname> must be given inside <species> to uniquely determine it. The best is if both elements can be given.

<species>

—

<species>, <trivialname>

(see also <species>)

<!-- Rainbow wrasse -->
<scientificname>Coris julis</scientificname>