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Hermatostroma

Classification

    Phylum:  
Porifera
    Class:  
Stromatoporoidea
    Order:  
Stromatoporellida
    Superfamily:  
Unknown
    Family:  
Trupetostromatidae
    Formal Genus Name and Reference:  
Hermatostroma NICHOLSON, 1886a, p. 105
    Type Species:  
H. schlueteri Nicholson, 1886a, p. 105-106, OD, NICHOLSON, 1892, p. 215-219, holotype, NHM P5527


Images

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Fig. 444a–d. *H. schlueteri, holotype, NHMP5527, Middle Devonian, Hebborn, Paffrath District, Germany; a, longitudinal section, showing grid of pillars and laminae; b, tangential section, showing pillars, round in cross section, X10; c, longitudinal section showing peripheral vesicles and compact pillars, X50; d, tangential section, showing peripheral vesicles, ×50 (Stearn, 2011b).


Synonyms

Argostroma


Geographic Distribution

Australia (Queensland), Russia (Kuznetsk Basin), Eifelian, Australia (Canning Basin, Queensland), Belgium (Ardennes), China (Guangxi, Guizhou, Yunnan), France (Boulonnais, Ancenis), Poland (Holy Cross Mountains), Thailand, Givetian, Czech Republic (Bohemia), England (Devon), Germany (Eifel), China (Guangxi, Sichuan, Yunnan), USA (Missouri), Middle Devonian, Australia (Canning Basin), Belgium (Ardennes), Canada (Alberta, Manitoba, Saskatchewan), China (Sichuan, Yunnan), Czech Republic (Moravia),Germany, Poland (Holy Cross Mountains), Russia (northeastern Siberia), USA (Iowa), Frasnian


Age Range

    Beginning Stage in Treatise Usage:  
Middle Devonian (Eifelian)
    Beginning International Stage:  
Eifelian
    Fraction Up In Beginning Stage:  
0
    Beginning Date:  
394.3
    Ending Stage in Treatise Usage:  
Upper Devonian (Frasnian)
    Ending International Stage:  
Frasnian
    Fraction Up In Ending Stage:  
100
    Ending Date:  
371.1


Description

Laminae extensive, prominent, tripartite with central dark zone, or light zone and more opaque lateral zones, penetrated by large pores between the pillars, pillars spool shaped, confined to interlaminar spaces, regularly superposed in longitudinal section, subcircular in tangential section, surrounded by peripheral cyst plates or bordered by peripheral vesicles. Microstructure compact, vacuolate, cellular. [Hermatostroma may grade into Trupetostroma through forms with lines of vacuoles along the pillar edges.]




References

Nicholson, H. A. 1886a. A Monograph of the British Stromatoporoids. Part I, General Introduction, vol. 39. Palaeontographical Society. London. p. 1-130, fig. 1-17, pl. 1-11.


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