Fig. 2 in Annular Chambers In Cretaceous Orbitolinidae (Larger Benthic Foraminifera): An Overview

Fig. 2 Annular chambers in Palorbitolinoides hedini Cherchi & Schroeder from the middle Albian Kazhdumi Formation of southwestern Iran. a Reflexed conico-concave test (Henson, 1948, fig. 12k–l). Early uniserial post-embryonic chambers marked in orange. b–c Low conico-concave test (Henson, 1948, fig. 12i–j) completely formed by annular post-embryonic chambers, so that the embryo base marks the test base. d High covexo-concave test (Henson, 1948, fig. 12r); compare to the specimen of Pseudorbitolina schroederi Luger shown in Fig. 3d.