Microporella appendiculata (Heller, 1867) from the Iberian-Provençal Basin A, B Bisbe cave E Falco Cave, PMC Rosso-Collection I. H. B.84b C, D, F, G Ionian Sea, Ciclopi 2000, PMC Rosso-Collection I. H. B.84a A unbleached autozooids with trifurcate proximal oral spines and long, setiform avicularian mandibles B unbleached autozooids with bifurcate proximal oral spines. Note the vertical arrangement of the unbranched distal spines forming a sort of fence around the orifice C two kenozooidal ovicells developed on marginal autozooids D colony portion showing the co-occurrence of kenozooidal ovicells (black arrows) and ovicells formed by the distal autozooid (white arrow). Note the occurrence of bifurcate and trifurcate proximal spines E young colony showing the tatiform ancestrula and first budded autozooids with bifurcate proximal spines F ancestrula regenerated as a miniaturised autozooid G close-up of the ascopore. Scale bars: 200 µm (A–D); 500 µm (E); 100 µm (F); 30 µm (G).