Clavatula

Harzhauser, Mathias, Landau, Bernard & Janssen, Ronald, 2022, The Clavatulidae (Gastropoda, Conoidea) of the Miocene Paratethys Sea with considerations on fossil and extant Clavatulidae genera, Zootaxa 5123 (1), pp. 1-172 : 40

‘ Clavatula ’ juliae group

We unite here two moderately large species, which are characterized by a broad conical coronate spire, a strongly constricted and strongly concave base leading to a long siphonal canal. Early teleoconch sculpture is bipartite with faint (‘ C. ’ jarzynkae) or prominent (‘ C. ’ juliae ) opisthocline riblets on broad mid-portion. The columella is more broadly excavated than in most other clavatulids. The bipartite early teleoconch whorls distinguish this group from Megaclavatula . The long siphonal canal and the opisthocline riblets on early teleoconch whorls allow a separation from Clavatula . The last whorl profile separates the ‘ Clavatula ’ juliae group from other bipatite groups such as the bimarginata -clade and the ‘ Clavatula ’ camillae group, which differ in their slender fusiform profile.