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Harklessia

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Journal Article

A NEW GENUS OF EARLY CAMBRIAN CORAL IN ESMERALDA COUNTY, SOUTHWESTERN NEVADA Available to Purchase

MELISSA HICKS
Published: 01 July 2006
Journal of Paleontology (2006) 80 (4): 609–615.
DOI: https://doi.org/10.1666/0022-3360(2006)80[609:ANGOEC]2.0.CO;2
...MELISSA HICKS Abstract Numerous Early Cambrian corals or “coralomorphs,” as they are often classified, are recorded from North America, Australia, and Siberia. A new Early Cambrian coral, Harklessia yuenglingensis n. gen. and sp., is found in conjunction with archaeocyathan-microbial reefs...
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Figure4—Photographs of Harklessia yuenglingensis n. gen. and sp. 1, 2, UCMP 50029. 3, Polished longitudinal cut, Holotype UCMP 50027

Figure 4 —Photographs of Harklessia yuenglingensis n. gen. and sp. 1, 2... Available to Purchase

Published: 01 July 2006
Figure 4 —Photographs of Harklessia yuenglingensis n. gen. and sp. 1, 2, UCMP 50029. 3, Polished longitudinal cut, Holotype UCMP 50027
Image
Figure5—Photomicrographs of thin sections of Harklessia yuenglingensis n. gen and sp. 1, Transverse section through corallum (UCMP 50030) illustrating the close-packed, polygonal corallites (note that all corallites share walls; detrital quartz and micrite are typical deposits in the corallites); 2, longitudinal section illustrating intercorallite budding (holotype UCMP 50027); 3, longitudinal section with new corallite wall forming during lateral increase (holotype UCMP 50027); 4, transverse section through same coral (holotype UCMP 50027) showing the new corallite wall growth; 5, 6, longitudinal ultra thin sections (UCMP 50030) at 10× magnification in plain light (5) and 40× magnification with cross polars (6) (coral skeleton composed of varying sized, randomly distributed, and irregularly shaped, microgranular calcite)

Figure 5 —Photomicrographs of thin sections of Harklessia yuenglingensis ... Available to Purchase

Published: 01 July 2006
Figure 5 —Photomicrographs of thin sections of Harklessia yuenglingensis n. gen and sp. 1, Transverse section through corallum (UCMP 50030) illustrating the close-packed, polygonal corallites (note that all corallites share walls; detrital quartz and micrite are typical deposits
Image
Field view, hand samples, and thin section from Harkless Formation at Gold Point Hills. A) Harkless Formation with carbonaceous sandstone and overlying reef, separated by erosional surface. Hammer for scale. B) Erosional surface found at red arrow in A. C) Polarized light thin section of carbonaceous sandstone with high birefringence anhydrite gypsum circled. Scale bar = 1 mm. D, E) Outcrop of Harkless Formation archaeocyaths with large osculum. F) Hand sample of coralomorph Harklessia. Photographed wet with reflected light. G) Sagittal view of coralomorph showing corallite columns. H) Top view of corallites. G and H coated in ammonium chloride.

Field view, hand samples, and thin section from Harkless Formation at Gold ... Available to Purchase

Published: 20 March 2019
section of carbonaceous sandstone with high birefringence anhydrite gypsum circled. Scale bar = 1 mm. D , E ) Outcrop of Harkless Formation archaeocyaths with large osculum. F ) Hand sample of coralomorph Harklessia . Photographed wet with reflected light. G ) Sagittal view of coralomorph showing
Journal Article

INCREASE IN CARBONATE CONTRIBUTION FROM FRAMEWORK-BUILDING METAZOANS THROUGH EARLY CAMBRIAN REEFS OF THE WESTERN BASIN AND RANGE, USA Available to Purchase

DAVID R. CORDIE, STEPHEN Q. DORNBOS, PEDRO J. MARENCO
Journal: PALAIOS
Published: 20 March 2019
PALAIOS (2019) 34 (3): 159–174.
DOI: https://doi.org/10.2110/palo.2018.085
... section of carbonaceous sandstone with high birefringence anhydrite gypsum circled. Scale bar = 1 mm. D , E ) Outcrop of Harkless Formation archaeocyaths with large osculum. F ) Hand sample of coralomorph Harklessia . Photographed wet with reflected light. G ) Sagittal view of coralomorph showing...
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Journal Article

The “earliest tabulate corals” are not tabulates Available to Purchase

Robert J. Elias, Dong-Jin Lee, Brian R. Pratt
Journal: Geology
Published: 04 November 2020
Geology (2021) 49 (3): 304–308.
DOI: https://doi.org/10.1130/G48235.1
... also been reported in Harklessia ( Hicks, 2006 ), but in our opinion, the illustrated examples show fission during axial increase. All of the above genera are Cambrian Epoch 2 in age. A substantial time span (∼25 m.y.) separates them from the Early Ordovician appearance of fossils previously...
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Journal Article

A lowermost Ordovician tabulate-like coralomorph from the Precordillera of western Argentina: a main component of a reef-framework consortium Available to Purchase

Marcelo G. Carrera, Ricardo A. Astini, Fernando J. Gomez
Published: 01 January 2017
Journal of Paleontology (2017) 91 (1): 73–85.
DOI: https://doi.org/10.1017/jpa.2016.145
... organization. Most of these forms were recorded in the Cambrian (e.g., Rosellatana Kobluk, 1984 ; Flindersipora Lafuste et al., 1991 ; Moorowipora Fuller and Jenkins, 1994 ; Tabulaconus Handfield, 1969 ; Harklessia Hicks, 2006 ). All these coral-like forms were grouped under...
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Journal Article

A problematic cnidarian ( Cambroctoconus ; Octocorallia?) from the Cambrian (Series 2–3) of Laurentia Available to Purchase

John S. Peel
Published: 09 August 2017
Journal of Paleontology (2017) 91 (5): 871–882.
DOI: https://doi.org/10.1017/jpa.2017.49
... ; Flindersipora Lafuste in Lafuste et al., 1991 ; Moorowipora Fuller and Jenkins, 1994 ; Arrowipora Fuller and Jenkins, 1995 ; Yaworipora Zhuravlev, 1999 ; and Blinmanipora Fuller and Jenkins, 2007 . Hicks ( 2006 ) listed 16 taxa of coralomorphs while describing Harklessia Hicks, 2006 from...
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Journal Article

Reptamsassia n. gen. (Amsassiaceae n. fam.; calcareous algae) from the Lower Ordovician (Floian) of western Newfoundland, and the earliest symbiotic intergrowth of modular species Available to Purchase

Dong-Jin Lee, Robert J. Elias, Brian R. Pratt
Published: 01 May 2022
Journal of Paleontology (2022) 96 (3): 715–728.
DOI: https://doi.org/10.1017/jpa.2021.122
... ). A number of taxa with modular coral-like skeletons are known from reefs dating to Cambrian Epoch 2, including Flindersipora Lafuste in Lafuste et al., 1991 , Moorowipora Fuller and Jenkins, 1994 , Arrowipora Fuller and Jenkins, 1995 , Harklessia Hicks, 2006 , and Blinmanipora Fuller...
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Book Chapter

Ediacaran and early Cambrian reefs of Esmeralda County, Nevada: Non-congruent communities within congruent ecosystems across the Neoproterozoic–Paleozoic boundary Available to Purchase

Author(s)
Stephen M. Rowland, Lynn K. Oliver, Melissa Hicks
Book: Field Guide to Plutons, Volcanoes, Faults, Reefs, Dinosaurs, and Possible Glaciation in Selected Areas of Arizona, California, and Nevada
Series: GSA Field Guide
Publisher: Geological Society of America
Published: 01 January 2008
DOI: 10.1130/2008.fld011(04)
EISBN: 9780813756110
... contain one of the earliest reported corals from North America, Harklessia yuenglingensis , which has similarities with tabulate corals ( Hicks, 2006b ). Unfortunately, the reefs with Harklessia are not easily accessible, so these early Cambrian corals will not be observed on this field trip...
Abstract
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Abstract Esmeralda County, Nevada, is extraordinary for the presence of Ediacaran and early Cambrian reefs at several stratigraphic positions. In this road log and field guide we present descriptions and interpretations of the most instructive exposures of three of these reef-rich intervals: (1) the Mount Dunfee section of the Middle Member of the Deep Spring Formation (Ediacaran in age), (2) the Stewart's Mill exposure of the Lower Member of the Poleta Formation (mid-early Cambrian), and (3) an exposure on the north flank of Slate Ridge of reefs near the top of the Harkless Formation (latest early Cambrian). We introduce the term “congruent ecosystems” for ecosystems of different age that occupied similar environments. The Ediacaran reefs of the Deep Spring Formation and the early Cambrian reefs of the Lower Member of the Poleta Formation occupied similar environments but exhibit distinctively different ecological structure. Thus we propose these two reef complexes as our premier example of non-congruent communities within congruent ecosystems.