Phaulactis cyathophylloides Temporal range: | |
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An illustration of Phaulactis cyathophylloides. | |
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Species: | †P cyathophylloides |
Binomial name | |
Phaulactis cyathophylloides Ryder, 1926 | |
Phaulactis cyathophylloides is an extinct species of rugose coral known from the silurian layers of Gotland, and Estonia. [1] It is the type species of the genus Phaulactis and was described by Ryder in 1926. It can grow to relatively large sizes. [2]
The species can have two different shapes, either turbinate or cylindrical. It can grow to 60 mm in length and 20 mm in diameter. The calyx is very deep and the septal ridges are well marked. As all other Phaulactis species, it has large amount of septa. [3]
Muhlenbergia schreberi, the nimblewill, is a grass species native to North America.
Diadsomaspis is an extinct genus of placoderm fish, which lived during the Late Devonian period in Europe.
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Dendrograptus is an extinct genus of graptolites from the Lower Ordovician.
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Hamodus is an extinct genus of prehistoric sarcopterygian or lobe-finned fish.
Orlovichthys is an extinct genus of prehistoric sarcopterygians or lobe-finned fish. Fossil evidence was found in Russia, and is from the Late Devonian period.
Ventalepis is an extinct genus of prehistoric sarcopterygians or lobe-finned fish.
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Craniops is an extinct genus of brachiopods in the family Craniopsidae with species known from the Ordovocian to the Devonian.
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Holophragma is an extinct genus of rugose coral known from Ordovician and Silurian rocks in Scandinavia, Russia, Australia and the United States. Two of its species can be found on the northwestern coast of Gotland, where it is one of the most common fossil genera. It was described by Gustaf Lindström in the year 1896. The genus contains two species.
Holophragma calceoloides is an extinct species of rugose coral known from Silurian layers mainly on, but not limited to, the northwestern coast of Gotland, where it is very common. The species was recognised in 1866 by Gustaf Lindström. It was small and benthic, and always solitary.
Holophragma mitrata is an extinct species of Rugose coral mainly known from the island of Gotland. It is horn shaped and can grow to about 40mm in length. The calyx is relatively deep and the septa runs from its ridge to the floor. The cardinal septa is not very dominant. It was described by Schlotheim in the year 1820 under the name Hippurites mitratus.
Phaulactis is an extinct genus of rugose coral that existed during the Ordovician, Silurian and Devonian periods. It can be found in Europe, North America, Asia and Australia. Phaulactis was described by Ryder in 1926.
Megadonichthys kurikae is an extinct species of fish belonging to the family Osteolepididae.