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Plectostroma
Classification
Phylum:
Porifera
Class:
Stromatoporoidea
Order:
Actinostromatida
Family:
Actinostromatidae
Formal Genus Name and Reference:
Plectostroma NESTOR, 1964a, p. 78
Type Species:
Actinostroma intertextum NICHOLSON, 1886b, p. 233, OD
Images
(Click to enlarge in a new window)
Fig. 426, 3a-b. *P. intertextum (Nicholson), holotype, Wenlock, Ironbridge, England, NHM P5620, a, longitudinal section, Nicholson slide 188b, latilaminar phases with short pillars low in figure and long pillars high in figure, b, tangential section, Nicholson slide 188 , showing well developed hexactinellid pattern, X10 (Stock, 2012).
Synonyms
Geographic Distribution
Russia (Altai, Salair), Silurian, Estonia, Russia (Siberian Platform, Tuva, Urals), Sweden (Gotland), Uzbekistan, Llandovery, China, middle Silurian, Canada (Northwest Territories), Estonia, Mongolia, Norway, Russia (Kuznetsk Basin, Urals), Sweden (Gotland), United Kingdom, Wenlock, China, Russia (Kuznetsk Basin, Pechora Basin, Urals), upper Silurian, Canada (Quebec), Estonia, Mongolia, Russia (Altai, Novaya Zemlya), Sweden (Gotland, Scania), Ukraine (Podolia), Ludlow, Canada (Quebec), Estonia, Mongolia, Ukraine (Podolia), Pridoli, Russia (northeastern Siberia), Uzbekistan, Lower Devonian, Canada (Arctic islands), Uzbekistan, Lochkovian, Australia (Victoria), Pragian, Canada (Arctic islands, Northwest Territories), Czech Republic, Spain, Emsian, Russia (Salair), Middle Devonian, Canada (Arctic islands, Northwest Territories), China (Guangxi), Czech Republic, Russia (Altai), Uzbekistan, Eifelian, China (Guangxi), Czech Republic, France, Givetian, Vietnam, Frasnian
Age Range
Beginning Stage in Treatise Usage:
lower Silurian (Llandovery)
Beginning International Stage:
Rhuddanian
Fraction Up In Beginning Stage:
0
Beginning Date:
443.07
Ending Stage in Treatise Usage:
Upper Devonian (Frasnian)
Ending International Stage:
Frasnian
Fraction Up In Ending Stage:
100
Ending Date:
371.1
Description
Pillars long, continuous, colliculi not horizontally aligned, in many cases not perfectly horizontal
References
Nestor, Heldur. 1964a. Stromatoporoidei Ordovika i Llandoveri Estoniii [Ordovician and Llandoverian Stromatoporoidea of Estonia]. Akademiia Nauk Estonskoi SSR, Institut Geologii. Tallinn. 112 p., 38 fig., 32 pl., 5 tables. In Russian with English summary.
Museum or Author Information
Classification
Phylum:
Porifera
Class:
Stromatoporoidea
Order:
Actinostromatida
Family:
Actinostromatidae
Formal Genus Name and Reference:
Plectostroma NESTOR, 1964a, p. 78
Type Species:
Actinostroma intertextum NICHOLSON, 1886b, p. 233, OD
Images
(Click to enlarge in a new window)
Fig. 426, 3a-b. *P. intertextum (Nicholson), holotype, Wenlock, Ironbridge, England, NHM P5620, a, longitudinal section, Nicholson slide 188b, latilaminar phases with short pillars low in figure and long pillars high in figure, b, tangential section, Nicholson slide 188 , showing well developed hexactinellid pattern, X10 (Stock, 2012).
Synonyms
Geographic Distribution
Russia (Altai, Salair), Silurian, Estonia, Russia (Siberian Platform, Tuva, Urals), Sweden (Gotland), Uzbekistan, Llandovery, China, middle Silurian, Canada (Northwest Territories), Estonia, Mongolia, Norway, Russia (Kuznetsk Basin, Urals), Sweden (Gotland), United Kingdom, Wenlock, China, Russia (Kuznetsk Basin, Pechora Basin, Urals), upper Silurian, Canada (Quebec), Estonia, Mongolia, Russia (Altai, Novaya Zemlya), Sweden (Gotland, Scania), Ukraine (Podolia), Ludlow, Canada (Quebec), Estonia, Mongolia, Ukraine (Podolia), Pridoli, Russia (northeastern Siberia), Uzbekistan, Lower Devonian, Canada (Arctic islands), Uzbekistan, Lochkovian, Australia (Victoria), Pragian, Canada (Arctic islands, Northwest Territories), Czech Republic, Spain, Emsian, Russia (Salair), Middle Devonian, Canada (Arctic islands, Northwest Territories), China (Guangxi), Czech Republic, Russia (Altai), Uzbekistan, Eifelian, China (Guangxi), Czech Republic, France, Givetian, Vietnam, Frasnian
Age Range
Beginning Stage in Treatise Usage:
lower Silurian (Llandovery)
Beginning International Stage:
Rhuddanian
Fraction Up In Beginning Stage:
0
Beginning Date:
443.07
Ending Stage in Treatise Usage:
Upper Devonian (Frasnian)
Ending International Stage:
Frasnian
Fraction Up In Ending Stage:
100
Ending Date:
371.1
Description
Pillars long, continuous, colliculi not horizontally aligned, in many cases not perfectly horizontal
References
Nestor, Heldur. 1964a. Stromatoporoidei Ordovika i Llandoveri Estoniii [Ordovician and Llandoverian Stromatoporoidea of Estonia]. Akademiia Nauk Estonskoi SSR, Institut Geologii. Tallinn. 112 p., 38 fig., 32 pl., 5 tables. In Russian with English summary.