A few species. Klein & Bogdanova (2013) list 14 species. The type species chosen by Casey (1961b, p. 191) is Douvilleiceras horridum Riedel, 1938. The 68 mm holotype, reproduced in Kennedy & Klinger (2015) and in the photograph at top left, shows 18 prominent, widely spaced but rather thin ribs, without intercalaries, sagged but still strong on the siphuncle. The ventrolateral tubercles divide into two on the last half-whorl. Casey (1962, p. 261) illustrates a rather different 59 mm specimen, with 17 ribs with larger, not yet divided tubercles, each followed by a thinner intercalary on the last whorl. These two specimens from Colombia have an uncertain stratigraphic level, but are assumed to be Aptian. Etayo-Serna (1979) created E. pedrocarvajali, another Colombian species known only from the Lower Albian. He states that the specimen from Casey (1962) belongs to this species.
Bogdanova & Mikhailova (2016) describe three species from the Clansayesian of Caucasus. E. clansayense (Jacob, 1905), also found in southeastern France, has widely spaced ribs with closer, undivided ventrolateral tubercles, with rare intercalaries (photo bottom left). It was a Douvilleiceras for Jacob. Some authors classify it as an Epicheloniceras, but this middle aptian genus does not occur in the Clansayesian (late Aptian). E. badkhyzicum Urmanova, 1962, known from fragments, has closely spaced ribs with bifid ventrolateral tubercles, without intercalaries. Finally, E. trituberculatum Sakharova, 1985, has closely spaced ribs with trifid ventrolateral tubercles. It has intercalaries, but these disappear around 35 mm.
Remarks. This genus is transitional between the Epicheloniceras of Middle Aptian, with lower ventrolateral tubercles that are never divided, and the Douvilleiceras of Lower Albian. Its species resemble D. inaequinodum (see its entry), except that the latter already has 6–8 clavi per flank at around 5 cm. According to Latil (2011) and then Kennedy & Klinger (2015), the Eodouvilleiceras are Douvilleiceras that traverse growth stages (development of tubercles and clavi) more slowly, and the Aptian origin of E. horridum is doubtful. We do not agree with their opinion, as they overlook the indisputably Aptian species described by Russian and Georgian authors. Moreover, the true Douvilleiceras appear later, at the top of the tardefurcata zone of Lower Albian.