scholarly journals Reconstructing time and diagenesis of limestone-marl alternations from the selective compaction of colonies of the tabulate coral Halysites

2019 ◽  
pp. 279-298
Author(s):  
T. Nohl ◽  
A. Munnecke
Keyword(s):  
Tabulate Coral

Procteria (Pachyprocteria) vermifera n. sp., an unusual Hicetes-bearing species of tabulate coral from the lower Eifelian of the Gaspé Sandstones Group, Rimouski County (Quebec, Canada)

2011 ◽  
Vol 48 (12) ◽  
pp. 1530-1542 ◽  
Author(s):  
Yves Plusquellec ◽  
Sylvain Desbiens ◽  
Rémy Gourvennec
Keyword(s):  
New Species ◽  
North America ◽  
Central Area ◽  
York River ◽  
Proximal Side ◽  
Unusual Association ◽  
Tabulate Coral ◽  
First Time

Procteria (Pachyprocteria) vermifera n. sp. is described from the upper part of the York River Formation (Gaspé Sandstones Group), lower Eifelian (brachiopod Amphigenia Zone), Rimouski County (Quebec, Canada). This new species is considered part of a new lineage of Pachyprocteria characterized by the presence of interstitial corallites. This study reveals for the first time that the granules on the lower (proximal) side are distributed irregularly, their density being higher in the central area of this side than at the periphery. The unusual association of the tabulate coral Procteria (Pachyprocteria) with the “worm” Hicetes is pointed out. The record of the new species adds to the known paleogeographic distribution of Pachyprocteria in North America (Laurussia).

Lamottia (Favositida, Tabulata) from the Decorah Formation (Kirkfieldian, Ordovician) of Iowa

1988 ◽  
Vol 62 (3) ◽  
pp. 424-426
Author(s):  
Jeffrey C. Edwards
Keyword(s):  
New York ◽  
Thin Section ◽  
Geographic Range ◽  
Upper Ordovician ◽  
North Central ◽  
The North ◽  
Tabulate Coral ◽  
Longitudinal Pattern ◽  
Stratigraphic Range ◽  
Diagenetic Feature

The early tabulate coral Lamottia heroensis has been identified from the Ion Member of the Decorah Formation (Upper Ordovician) in northeast Iowa. This extends the stratigraphic range of this species upward from Lower Chazyan to Kirkfieldian, and extends the geographic range from the Vermont-New York border area to include the north-central Midcontinent. Thin section and SEM studies strongly support the contention that the longitudinal pattern of alternating light and dark bands observed in corallite walls reflects a primary structural grain rather than a secondary diagenetic feature.

scholarly journals HUBUNGAN KEPADATAN SIPUT (Drupella) DENGAN KONDISI EKOSISTEM TERUMBU KARANG DI PERAIRAN PULAU SEMUJUR PROVINSI KEPULAUAN BANGKA BELITUNG

2019 ◽  
Vol 13 (2) ◽  
pp. 152-161
Author(s):  
ISTIQOMAH ISTI QOMAH ◽  
Okto Supratman ◽  
Indra Ambalika Syari
Keyword(s):  
Coral Reef ◽  
Coral Cover ◽  
Principal Component ◽  
Total Suspended Solid ◽  
Data Retrieval ◽  
Suspended Solid ◽  
Coral Reef Ecosystem ◽  
Tabulate Coral ◽  
Belt Transect ◽  
Reef Ecosystem

This research aims to analyse density of Drupella's on coral reef ecosystem, analyze the percentage of coral cover and analyze the relationship between the density of Drupella with environmental factors and conditions coral reef ecosystem in the waters of Semujur Island. Research data retrieval in April 2019 in the waters of Semujur Island. Drupella data retrieval using Belt Transect method and coral reef data retrieval using Line Intercept Transek. The results showed that the highest overall density of Drupella is in the area of coral, which is 244 ind/100m2 and the lowest density of Drupella is in the landscaped area of 31 ind/100m2, coral cover percentage Highest in the area of coral average of 72.20% and the lowest 23.44% while on the highest cover area of 54.96% and lows of 29.14%. Principal Component Analysis (PCA) in the reef flats and Drupella watersheds correlates with temperature, current, pH, Dissolved Oxygen and Total Suspended Solid. Correspondence Analysis (CA) in the reef flats was found that Drupella was positively correlated with lifeforms acropora submassive, acropora tabulate, coral submassive, and coral massive. In the slope area of the Drupella positively correlated with the type of lifeform acropora digitate, acropora submassive, acropora tabulate, coral submassive, and coral branching.

scholarly journals Paleoecological Significance of a Pre-Mortem Crinoid-Coral Interaction from the Silurian of Southeastern Indiana

2021 ◽  
Vol 3 ◽  
Author(s):  
James Thomka ◽  
Thomas E. Bantel
Keyword(s):  
Lateral Margin ◽  
Biological Functions ◽  
Tabulate Coral

A noteworthy specimen recording a syn vivo interaction between a stalked echinoderm and a tabulate coral is described herein from the middle Silurian (Wenlock: Sheinwoodian) Massie Formation of Ripley County, southeastern Indiana. Part of the column of the camerate crinoid Eucalyptocrinites is encrusted around the entirety of its lateral margin by a favositid colony. The radially outward orientation of corallites on both the upper and lower surfaces of the colony show that the coral was elevated completely above the seafloor and, more importantly, that the crinoid column had to be vertical at the time of initial encrustation and subsequent coral astogeny. Hence, the crinoid host was most likely alive throughout the duration of this interaction. No evidence for a paleopathological reaction is present on the crinoid column, suggesting that the encruster did not adversely affect the host. This most likely reflects the long and inflexible column of Eucalyptocrinites, which could have supported encrusting, secondarily tiered organisms—even relatively heavy ones—without interfering with the biological functions of the crown or weighing down the column.

Allochthonous Permian micro- and macrofauna, Kamloops area, British Columbia

1985 ◽  
Vol 22 (3) ◽  
pp. 442-451 ◽  
Author(s):  
Samuel J. Nelson ◽  
Eric R. Nelson
Keyword(s):  
British Columbia ◽  
Western Hemisphere ◽  
Island Arc ◽  
Late Permian ◽  
Early Permian ◽  
Tabulate Coral

The first waagenophyllid coral to be described from the Western Hemisphere has been found in Permian rocks of the "Harper Ranch Group," near Kamloops, southern British Columbia. It is Parawentzelella?(Miyagiella) johnstonae sp. nov., associated with the tabulate coral Multithecopora?larushi sp. nov., numerous brachiopods, and other fossils. The containing rocks are considered to be allochthonous, originating in the western part of the Paleopacific Tethyan Ocean or in an island-arc complex farther to the north.The outcrop yielding the fossils appears to be a stratigraphic misfit, both in age and origin. Fusulinids from adjacent areas are of Early Permian (Wolfcampian) age but those associated with the fossils indicate a Late Permian (Guadalupian) age. These conflicting dates cannot, at present, be reconciled. The Tethyan origin of the fauna also contrasts with that of surrounding rocks, which are "non-Tethyan."

Endobiotic cornulitids in Upper Ordovician tabulate corals and stromatoporoids from Anticosti Island, Quebec

2010 ◽  
Vol 84 (3) ◽  
pp. 518-528 ◽  
Author(s):  
Owen A. Dixon
Keyword(s):  
Coral Species ◽  
Coral Host ◽  
Shell Wall ◽  
Upper Ordovician ◽  
Layered Shell ◽  
Tabulate Coral ◽  
Anticosti Island ◽  
Commensal Relationship ◽  
Stratigraphic Range ◽  
Tabulate Corals

Conoidal shells of Cornulites celatus n. sp. occur commonly within host coralla of Propora conferta Milne-Edwards and Haime, 1851, sensu lato, from the Laframboise Member of the Ellis Bay Formation (Ashgill: Upper Ordovician) at Pointe Laframboise on western Anticosti Island. Examples have also been found at the same locality in the tabulate corals Paleofavosites sp., Acidolites arctatus Dixon, 1986, and A. compactus Dixon, 1986, and the stromatoporoid Ecclimadictyon sp., but not in other associated tabulate coral species. Growth interference between the shells and their hosts indicates a commensal relationship. C.celatus apparently had a more limited paleoenvironmental range than its principal coral host species, which occurs abundantly elsewhere on the island without its endobiotic partner. The diagnosis of Cornulites is emended to include forms having a two-layered shell wall with a distinctive outer layer consistently preserved as prismatic calcite. This new species extends the known stratigraphic range of cornulitids in commensal relationships with corals and stromatoporoids from the Silurian back to the Upper Ordovician.

A new tabulate coral species from the Pitkin Formation (Chesterian) of north-central Arkansas

1990 ◽  
Vol 64 (4) ◽  
pp. 664-666 ◽  
Author(s):  
Gregory E. Webb
Keyword(s):  
Coral Species ◽  
The West ◽  
North Central ◽  
Coral Fauna ◽  
Tabulate Coral

The coral fauna of the Upper Mississippian (Chesterian) Pitkin Formation was described by Easton (1943) and, more recently, by Webb (1987), who defined two coral faunules. The lower faunule occurs throughout the Pitkin outcrop belt from northeastern Oklahoma to north-central Arkansas. The upper faunule has been recognized only in north-central Arkansas where a higher part of the Pitkin is preserved. Equivalent strata have apparently been removed to the west by the pre-Pennsylvanian regional unconformity that differentially truncates Chesterian strata across the Ozark uplift. Thus the upper faunule is less well known than the lower faunule. The purpose of this note is to describe a new tabulate coral from the upper faunule in Searcy County, Arkansas.

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