Definition of Helcionella. Meaning of Helcionella. Synonyms of Helcionella

- Helcionella is a genus of helcionellid, a fossil marine invertebrate animal that is considered to be a mollusk and may possibly be a gastropod. The s****...
- lineage, if they are gastropods at all. Earliest Cambrian organisms like Helcionella, Barskovia and Scenella are no longer considered gastropods,[citation...
- several fossils: Acrothele bellapunctata Ellipsocephalus nordenskjoldi Helcionella subrugosa Holmia grandis, H. kjerulfi Kjerulfia lata Marocella antiqua...
- America. Teiichi KOBAYASHI (1987). "The Ancestry of the Cephalopoda: From Helcionella to Plectronoceras". Proceedings of the ****an Academy, Series B: Physical...
- subsidua Bathyuriscus-Elrathina & Bolaspidella Zones. A brachiopod. Helcionella "H." arguta Bathyuriscus fimbriatus & Bolaspidella contracta Subzones...
- more derived. The Helconellidae (Wenz, 1938) represented by the genus Helcionella (Grabau & Shimer, 1909) more closely resembles the monoplacophoran ancestor...
- †Gnathodus †Gravicalymene †Greenops †Hallipterus †Hardieopterus †Hazelia †Helcionella †Hexactinellid †Hindeodus †Holonema †Holopea †Holoptychius †Holoptychus...
- enigmatic body fossils such as hyoliths; the single-s****ed, mollusk Helcionella; Scenella hermitensis; and Chancelloria. Although trace fossils are common...
- †Flexicalymene senaria †Foerstia †Girvanella †Glauconome †Gonioceras †Hallopora †Helcionella †Heliomeroides †Hemithecella – type locality for genus †Holia †Holopea...
- obsolete nomenclature †Girvanella †Gogia †Goniograptus †Haplophrentis †Helcionella †Helicoprion †Helicoprion davisii – type locality for species †Hintzeia...