Clathrina heronensis Wörheide & Hooper, 1999

Clathrina heronensis Wörheide & Hooper, 1999 View in CoL

Figures 4–e View FIGURE 4

Clathrina heronensis Wörheide & Hooper, 1999: 863 View in CoL , figs 3A–F; Klautau & Valentine, 2003: 28, fig. 21.

Material examined. RMNH 4499 About RMNH , Indonesia. Kalimantan, Berau region, Derawan Islands, Maratua Island , Haji Buang Marine Lake , 2.2044°N 118.5987°E, depth 1–2 m, snorkeling, coll. L.E. Becking GoogleMaps , # LE156 , 11 September 2008 .

Description. ( Fig. 4a View FIGURE 4 ) Small, flatly encrusting loosely open network of thin tubes. Water collecting tubes or oscules not apparent. In situ color is transparent white, discoloring to brown in preserved condition ( Fig. 4b View FIGURE 4 ). Size of cormus 1.5 x 2 cm, tubes thin, at most up to 2 mm in diameter, usually less than 1 mm. Consistency in preserved state stiff, fragile.

Skeleton. ( Figs 4c–d View FIGURE 4 ) Several layers of irregularly arranged triactines.

Spicules. Triactines only.

Triactines ( Fig. 4e View FIGURE 4 ), mostly equiangular equiactinal, but some are faintly parasagittal, size of conico-cylindrical actines 93– 125.9 –162 x 8– 9.3 –11.5 µm.

Eology. Shallow-water, in marine lake on mangrove roots. Elsewhere in caves.

Distribution. Indonesia, NE Australia.

Remarks. The specimen, which is now broken into two fragments, is closely similar to Australian material according to descriptions of it in Wörheide & Hooper (1999) and Klautau & Valentine (2003). White color, brown discoloration in alcohol, cormus shape and spicule size and form of our material fit well with the type.