Skeletons in confusion: a review of astrophorid sponges with (dicho-) calthrops as structural megascleres (Porifera, Demospongiae, Astrophorida) Author Van Soest, Rob W. M. Author Beglinger, Elly J. Author De Voogd, Nicole J. text ZooKeys 2010 68 1 88 http://dx.doi.org/10.3897/zookeys.68.729 journal article http://dx.doi.org/10.3897/zookeys.68.729 1313-2970-68-1 Dercitus Stoeba Stoeba sp.? Vacelet and Vasseur 1971 : 70, fig. 14. Material examined. None. Description (from Vacelet and Vasseur 1971 ). Encrusting the underside of coral blocks, 2-3 cm2 in expansion; consistency soft; live colour yellow, white in alcohol. Spicules: calthrops, sanidasters,?strongyles. Calthrops with irregular cladi, 50-250 x 15-25 µm . Sanidasters short and fat, 12.5 x 2.5 µm . Strongyles, probably foreign, long and thin 375-400 x 3-5 µm . Habitat. Shallow reefs. Distribution. Known only from the Tulear area, Madagascar. Remarks. Live colour and the details of the spicules make it likely that this is an undescribed species. The strongyles are considered foreign as the authors themselves suggested.