FIG. 6. — A in A cool-water bryozoan association from the La Pola Formation (Sandbian, Ordovician) of Argentine Precordillera

FIG. 6. — A, Dianulites rocklandensis Wilson, 1921, tangential section showing autozooecial apertures, CEGH-UNC 27503 a; B-D, Monticulipora aff. mammulata d'Orbigny, 1850, CEGH-UNC 27516 d; B, C, tangential thin section showing autozooecial apertures; D, longitudinal thin section showing autozooecial chambers with cystiphragms; E-G. Orbignyella multitabulata Coryell, 1921; E, F, longitudinal thin section showing autozooecia with diaphragms, CEGH-UNC 27505 a; G, tangential thin section showing autozooecial apertures, CEGH-UNC 27505 b. Scale bars: A, C, 0.2 mm; B, G, 0.5 mm; D, F, 1 mm; E, 2 mm.