FIGS 5 in Notes on astogeny of some Petraliellidae (Bryozoa) from Australia

FIGS 5±8. Riscodopa biincisa (Waters): scanning electron micrographs of colonies from Balcombe Bay, Victoria, Miocene. (5) MOV, ancestrula (a) and two primary zooids. Note complex suboral mucro with paired avicularia on right-hand zooid (arrowed) Ö 62. (6) Enlarged primary zooid showing lyrula and oral spines Ö 110. (7) NHM D5351, basal surface showing septular pores (arrowed) and raised proximal lamina of marginal zooids Ö 70. (8) Riscodopa paucipora sp. nov.: MOV P128374, Browns Creek, Victoria, Upper Eocene. Scanning electron micrograph of basal surface of zooid (see also Žgure 10). Note median group of septular pores and raised proximal and marginal lamina (arrowed) Ö 106.