Figure 4. Fallotella causae Berlanga, 1997 from the Paleocene of Campeche (SE Mexico). Scale bar = 0.3 mm. A, D-G, I, axial sections. B-C, H, longitudinal sections close to the axial plane. J-M, transversal sections. A, 95-Me-36-01. B, 95-Me-36-02 (Paralectotype). C, 95-Me-36-03 (Paralectotype). D, 95-Me-36-07. E, 95-Me-36-08. F, 95-Me-36-09. G, 95-Me-36-10. H, 95-Me-36-11. I, 95-Me-36-04 (Paralectotype). J, 95-Me-36-05 (Paralectotype). K, 95-Me-36-06 (Paralectotype). L, 95-Me-36-12. M, 95-Me-36-13.

Abbreviations: b: beam; i b: intercalary beam; f: foramen; m t: marginal thickening; p: pillar; pr: proloculus. See Hottinger, 2006, for definition of terms.