considered to be synonyms. These can be ordered from most compressed to thickest as E. aspasia, E. microceras, E. loricatus, E. pricei and E. subtuberculatus. E. loricatus var. meandrina has been formerly promoted to separate species, as its ribs do not start in the groups of 2, or 3, but in groups of 3, or 4. It is the youngest variation of E. loricatus, but now, this separation of it is not considered to be necessary. E. neglectus is considered to be a synonym of E. meandrinus. E. lautus Synonyms: E. truncatus Spath, 1925 E. opalinus Spath, 1930 E. nitidus Spath, 1925 E. proboscideus J. Sowerby, 1921 Ammonite with strong lautiform ribs that are curved forward in the last third of the flank. It differs from its predecessor, E. loricatus by having excavated siphonal line with subrectangular section. There is big variability in the case of shell thickness. Old synonyms can be ordered by thickness from most compressed to thickest as E. lautus, E. truncatus, E. opalinus, E. nitidus and E. proboscideus. It has lived during middle and early part of upper Albian and gave rise to E. ochetonotus. E. ochetonotus Synonyms: E. sublautus Spath, 1928 E. solenotus Seeley, 1865 E. serotinus Spath, 1930 E. trapezoidalis Spath, 1930 E. armatus Spath, 1925 Ribs are subradial to flexuous and became attenuated on the living chamber. Venter is flat with siphonal canal and ventro-lateral clavi are slightly oblique to it. Forms of this species, which has been formerly considered to be valid species can be ordered from slimmest to thickest as E. ochetonotus, E. sublautus, E. solenotus, E. serotinus, E. trapezoidalis and E. armatus. It has been living during the base of upper Albian. E. subcrenatus Synonyms: E. inornatus Spath, 1930 Micromorph with very weakened ornamentation. Sigmoid ribs ends at the venter, where they create crenulations by both sides of siphonal canal. Its form, that has been named as formerly separate species E. inornatus is almost smooth. It lived during the early part of upper Albian. E. alphalautus Synonyms: E. vulgaris Spath, 1928 E. boloniense Spath, 1926 Species with sigmoid ribs that tends to form crenulations on the ventro-lateral shoulder. Siphonal canal is tending to form shape of V and is less hollow than in the case of other species. Species that are now considered to be synonyms were based on the difference in their thickness. E. alphalautus is the thinnest one,