TABLE 2 in A preliminary account of the Arctic / Subarctic Suberites (Porifera: Demospongiae) fauna

TABLE 2. Morphological characters of Suberites present in the Arctic/Subarctic region.
SpeciesShapeTextureSurfaceOsculumSkeletonMegascleresMicroscleresSuberites lutkenii s. str.Massive, fungiform. Weak pedicle serves to attach body to a substrateElastic, rubberyWrinkled, corrugated, velvetySingle, apical in position, fringed by a spicular collarChalichondroid with ectosomal bouquets of smaller scleresChoanosomal subtylostyles and ectosomal tylostylesMicrospined microrhabds (oxeas, stongyles & styles)Suberites lutkenii var. lanataMassive, slightly lobose; grows laterally; lies on the sideSoft, elastic, fleshlyConuloseWide osculum is partitioned by septaAs in S.lutkenii s. str., but choanosomal skeleton has a tendency to radial arrangementAs in S.lutkenii s. str.As in S.lutkenii s. str.Suberites cebrionesMassive, cup-shapedFirm and compact, like a corkSmoothInconspicuousAs in S.lutkenii s. str., but microrhabds are also found in choanosomeAs in S.lutkenii s. str.As in S.lutkenii s. str.Suberites spermatozoonMinute (~ 5 mm in length), pyriform, elongate, laterally compressedFriableOptically smoothSingle, apicalConfused, with ectosomal bouquets of smaller tylostylesStyles (tylo- and sub-tylostyles) of one size class onlyMicrospined microrhabds. No microstylesSuberites syringellaBranching erect, with anastomosing side branchesSoft and delicateRather smooth, velvetyMultiple, scattered along the sides of branchesIll-developed longitudinal spicule tracts in choanosome; ectosomal bouquets are presentOne category: tylo- and subtylostylesNo microscleresSuberites montinigerHemisphericalCompact and elastic.even to touch, yet it is covered with reduced papillaeSingle, surrounded by spicular collarAs in S.lutkenii s. str.Of one kind only: slightly sinuous subtylostylesNo microscleres