Fig. 6 in The diploporite blastozoan Lepidocalix pulcher from the Middle Ordovician of northern Algeria: Taxonomic revision and palaeoecological implications

Fig. 6. Oral surface of the diploporite blastozoan Lepidocalix pulcher Termier and Termier, 1950a (MUA. 1024020); Middle Ordovician, Stita, Algeria. A. Four peri-orals (PO1, PO3, PO4, and PO6) between four circum-orals (CO1, CO2, CO4, and CO5), peristome partially covered by small subtriangular oral cover plates biseries, diplopore-bearing polygonal thecal plates immediately surrounding the peristome, hydropore over PO1 and PO6; in external view. B. Surface showing numerous diplopores. Photographs (A1, B1), coloured interpretations (A2, B2) of both surfaces illustrating names using circumorals and periorals (Paul 1973, 2017); in internal view. B–E ambulacral designations in Carpenter's system. Scale bars 5 mm.