Article: The belemnite genera Dicoelites Boehm and Prodicoelites Stolley

Dicoelites Boehm (type species Belemnites dicoelus Rothpletz) contains two separate groups of belemnites which have in common only the possession of a dorsal as well as a ventral groove. B. dicoelus, with a slender elongate cylindrical guard, belongs to one group and Dicoelites keeuwensis Boehm, with a short robust conical guard, to the other. In this paper the name Dicoelites is restricted to belemnites of the dicoelus group, to which Stolley has given the name Prodicoelites, and a new genus, Conodicoelites, is proposed for those of the keeuwensis group, with D. keeuwensis as type species. Both genera and their main species are described. Dicoelites species are known from the Middle and Upper Jurassic of Indonesia, South America, and the Himalayas and Conodicoelites from the Middle and Upper Jurassic of Indonesia, New Zealand, the Himalayas, Swiss Alps, and Polish Carpathians.