Protohertzina: Difference between revisions

Protohertzina; Temporal range: Early Cambrian PreꞒ Ꞓ O S D C P T J K Pg N
Scientific classification
Kingdom:	Animalia
Phylum:	Chordata
Class:	†Conodonta? Chaetognatha?
Order:	Protoconodonta? Paraconodonta
Family:	[(Amphigeisinidae]]?
Genus:	†Protohertzina; Missarzhevsky, 1973
Species
	Protohertzina anabarica Missarzhevsky 1973 (type); Protohertzina cultrata Missarzhevsky 1977; Protohertzina dabashanensis Yang and He 1984; Hastina quadrigoniata Yang and He 1984; Protohertzina robusta Qian 1977; Protohertzina siciformis Missarzhevsky 1973; Protohertzina unguliformis Missarzhevsky 1973;
Synonyms
	Emeidus Chen 1982; Hastina Yang and He 1984;

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Revision as of 17:12, 27 July 2016

Protohertzina is a genus of protoconodonts or paraconodonts found at the beginning of the Cambrian explosion.

Protoconodonts are an extinct taxonomic group of conodonts or, possibly, Chaetognaths.^[2]

Chaetognaths (also known as arrow worms) were thought possibly to be related to some of the animals grouped with the conodonts. The conodonts themselves, however, are thought to be related to the vertebrates. It is now thought that protoconodont elements (e.g., Protohertzina anabarica Missarzhevsky, 1973), are probably grasping spines of chaetognaths rather than teeth of conodonts.

Protohertzina fossils have been found in the Ingta Formation of Canada.

References

^ Conodont-shaped organisms from Precambrian-Cambrian boundary strata of the Siberian Platform and Kazakhstan. VV Missarzhevsky - Trudy Instituta Geologii i Geofiziki SO AN SSSR, 1973
^ Zooproblematica and mollusca from the Lower Cambrian Meishucun section (Yunnan, China) and taxonomy and systematics of the Cambrian small shelly fossils of China. P. Y. Parkhaev and Y. Demidenko, Paleontological Journal, 2010, volume 44, issue 8, pages 883-1161, doi:10.1134/s0031030110080010

External links

"Protohertzina" at the Encyclopedia of Life
"Protohertzina" at the Encyclopedia of Life
"Protohertzina". Fossilworks. Gateway to the Paleobiology Database. Retrieved 27 July 2016.

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[1] Conodont-shaped organisms from Precambrian-Cambrian boundary strata of the Siberian Platform and Kazakhstan. VV Missarzhevsky - Trudy Instituta Geologii i Geofiziki SO AN SSSR, 1973

[2] Zooproblematica and mollusca from the Lower Cambrian Meishucun section (Yunnan, China) and taxonomy and systematics of the Cambrian small shelly fossils of China. P. Y. Parkhaev and Y. Demidenko, Paleontological Journal, 2010, volume 44, issue 8, pages 883-1161, doi:10.1134/s0031030110080010

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