Cheleutochroa Temporal range: | |
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Scientific classification | |
Domain: | Eukaryota |
Kingdom: | incertae sedis |
(unranked): | † Acritarcha |
Genus: | † Cheleutochroa Alfred R. Loeblich Jr and Helen Tappan, 1978 [1] |
Species | |
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Cheleutochroa is an extinct genus of acritarchs from the Ordovician.
C. elegans was recovered from Rapla borehole in Estonia. [2]
Acritarchs are organic microfossils, known from approximately 1800 million years ago to the present. The classification is a catch all term used to refer to any organic microfossils that cannot be assigned to other groups. Their diversity reflects major ecological events such as the appearance of predation and the Cambrian explosion.
Rapla is a town in central Estonia, the capital of Rapla County and the centre of Rapla Parish.
Rapla Parish is an Estonian municipality located in Rapla County. It has a population of 13,193 and an area of 859 km2.
Leiosphaeridia is a form-genus of acritarchs proposed by Eisenack in 1958. The grouping was refined to represent a more natural group by Jankauskas.
Hagudi is a small borough in Rapla Parish, Rapla County, Estonia. As of the 2011 census, the settlement's population was 311.
Kuusiku is a small borough in Rapla Parish, Rapla County, Estonia. It has a population of 250. Kuusiku Manor and Rapla Airfield are located in Kuusiku.
Lonchodomas is a genus of trilobites, that lived during the Ordovician. It was eyeless, like all raphiophorids, and had a long straight sword-like frontal spine, that gradually transforms into the relatively long glabella. Both the glabellar spine and the backward directed genal spines are subquadrate in section. Lonchodomas has five thorax segments and the pleural area of the pygidium has two narrow furrows. Lonchodomas occurred in what are today Argentina, Canada (Newfoundland), Estonia, Latvia, Norway, Sweden, the Russian Federation and the United States.
Kaiu is a small borough in Rapla Parish, Rapla County, Estonia.
Juuru is a small borough in Rapla Parish, Rapla County, Estonia. From 1991 until 2017, Juuru was the administrative center of Juuru Parish.
Atla is a village in Rapla Parish, Rapla County, Estonia. It is located about 13 km (8 mi) northeast of the town of Rapla, just east of Juuru and 6 km (4 mi) northwest of Kaiu, by road no. 14. As of the 2011 census, the village's population was 81. Between 1991 and 2017, the village was located in Juuru Parish.
Mahtra is a village in Rapla Parish, Rapla County, Estonia. It has a population of 92. Between 1991 and 2017 the village was located in Juuru Parish.
Kuimetsa is a village in Rapla Parish, Rapla County in northwestern Estonia. Between 1993–2017 the village was located in Kaiu Parish.
Jalase is a village in Rapla Parish, Rapla County in northwestern Estonia. Between 1991–2017 the village was located in Raikküla Parish.
Koikse is a village in Rapla Parish, Rapla County in northwestern Estonia. Between 1991–2017 the village was located in Raikküla Parish.
Raikküla is a village in Rapla Parish, Rapla County in northwestern Estonia. Between 1991 and 2017 the village was located in Raikküla Parish.
Iira is a village in Rapla Parish, Rapla County in northwestern Estonia.
Seli is a village in Rapla Parish, Rapla County in northwestern Estonia.
Helda is a village in Rapla Parish, Rapla County, Estonia. It's located about 8 km northeast of the town of Rapla. It has an area of 545 ha and a population of 43.
Similodonta is an extinct genus of early bivalve in the extinct family Praenuculidae. The genus is one of eleven genera in the subfamily Praenuculinae. Similodonta is known from Middle Ordovician through Middle Silurian fossils found in Europe and North America. The genus currently contains eight accepted species, Similodonta ceryx, Similodonta collina, Similodonta djupvikensis, Similodonta magna, Similodonta recurva, Similodonta spjeldnaesi, Similodonta wahli and the type species Similodonta similis.
Granomarginata is a genus of spherical Cambrian acritarchs interpreted as a phytoplankton.