Description. Macroscopic features. KML 1012; specimen up to 2 cm high extending over several cm 2 as a mat in the field, beta stage. In a 1 cm x 2 cm portion the surface is penetrated by four holes into which the oscula have retracted. One hole is 1.1 mm in diameter, the other three are 0.35 mm in diameter; oscula closed. Much of the surface covered by pore sieves which in the preserved material are flush with the surface (Fig. 3 B); sieve formed by a series of arched fingerlike structures connected by fine filaments; spaces between the intersections represent the pores averaging about 22 µm in diameter; 10 – 20 pores together form the sieve covering 1 to 2 ostia each 55 – 92 µm in diameter, and spaced at intervals of 185 – 440 µm. Ectosome 0.2 – 0.5 mm thick; where thin, forms dimples over tips of fibres spaced at 90 to 100 µm intervals (Fig. 3 A). Ectosome with tylostyles aligned with points extending about 100 µm beyond the surface. Mat of anastomosing fibres extends below the C. lobata ectosome two or more cm, colour golden brown, consistency unyielding and almost rock hard in alcohol. Fibres form tight mesh with openings of 180 – 240 µm (Fig. 3 C); all interfibre spaces filled by C. lobata choanosome and a few sand grains; fibres cored, knarled and lumpy; secondary fibres dominate; 60 – 250 µm diameter; laminated in part (Fig. 3 D); and free of debris except for occasional tylostyles incorporated into walls (Fig. 3 E). Primary fibres 350 – 900 µm diameter formed from fusion of secondary fibres to form lumpy plates about 1 mm below the surface. No tertiary fibres; no identifiable ectosome. No evident excavation chambers. Colour in life dull yellow.
Sumber: Taxonomic review of Hadromerida (Porifera, Demospongiae) from British Columbia, Canada, and adjacent waters, with the description of nine new species