Fig. 2
Scanning electron micrographs of Rorypora retiformis (Haime, 1854); Jurassic, Late Aalenian, Dogger, Murchisonae-Schichten; Rickenbacher Flue, Gelterkinden, Kanton Baselland, Switzerland. a Branches and two sediment-filled lacunae. b Lacuna surrounded by kenozooids. c Branch partly broken away to reveal moulds of zooids opening on opposite side of branch. d Autozooids. e Salient zooidal boundary walls and two autozooidal apertures apparently closed by terminal diaphragms. f Fractured interzooidal wall with pores and transversely fibrous skeletal fabric. Scale bars a 1 mm, b, c 500 μm, d 200 μm, e 100 μm, f 50 μm