Zoarium

a collection of distinct, individual zooids that make up a compound or colonial organism.
the supporting structure for a polyp colony; polyzoarium.
historical examples

this species is related to p. emarginata, from which it may be distinguished by the following characters:— zoarium.
freshwater sponges, hydroids & polyzoa nelson annandale

the zoarium is of delicate appearance and branches sparingly.
freshwater sponges, hydroids & polyzoa nelson annandale

the zoarium consists of a circular or oval m-ss of no great size.
freshwater sponges, hydroids & polyzoa nelson annandale

major walton found it growing over a zoarium of hislopia lacustris.
freshwater sponges, hydroids & polyzoa nelson annandale

the arrangement of the polypides in the zoarium and the general structure of the statoblasts are very similar in the two species.
freshwater sponges, hydroids & polyzoa nelson annandale

a zoarium with its included polypides is finally produced from the young polypide by the rapid development of buds.
freshwater sponges, hydroids & polyzoa nelson annandale

it possesses a creeping “sole” or organ of progression at the base of the zoarium.
freshwater sponges, hydroids & polyzoa nelson annandale

the zoœcia are not distinct from one another, but in dendritic forms the zoarium is divided irregularly by chitinous part-tions.
freshwater sponges, hydroids & polyzoa nelson annandale

the zoarium consists primarily of a main axis running in a straight line, with lateral branches that point forwards and outwards.
freshwater sponges, hydroids & polyzoa nelson annandale

the zoarium as a whole is either rec-mbent and adherent or at least partly vertical.
freshwater sponges, hydroids & polyzoa nelson annandale