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Pachytheca
Classification
Phylum:
Porifera
Class:
Demospongiae
Order:
Hadromerida
Family:
Suberitidae
Formal Genus Name and Reference:
Pachytheca SCHLÜTER, 1885, p. 144
Type Species:
Images
(Click to enlarge in a new window)
Fig. 137a–c. *P. stellimicans, Eifelian, western Germany; a, transverse section of paralectotype, X20; b, longitudinal section of lectotype, X18.7; c, longitudinal section showing penicillate, water-jet (fascicular fibrous) microstructure of lectotype, X21 (Birenheide, 1985, pl. 1). --Fig. 138a–c. P. cf. P. stellimicans, Eifelian, northern Spain; a, calcite pseudomorph of tylostyle megasclere, X204; b, diagrammatic sketch of tylostyle megasclere, X270; c, diagrammatic reconstruction of basal skeleton, X52.5 (Reitner, 1992, p. 153, fig. 30, pl. 22, 6 ).
Synonyms
Geographic Distribution
Middle Devonian: Germany (Eifel), Great Britain, Russia (northern Urals).
Age Range
Beginning Stage in Treatise Usage:
Middle Devonian
Beginning International Stage:
Eifelian
Fraction Up In Beginning Stage:
0
Beginning Date:
394.3
Ending Stage in Treatise Usage:
Middle Devonian
Ending International Stage:
Givetian
Fraction Up In Ending Stage:
100
Ending Date:
378.9
Description
Growth form laminar, tubules polygonal in transverse section, long and thin longitudinally, most tubules filled with secondary calcite, as in Ceratoporella, microstructure penicillate water-jet (fascicular fibrous). [The following was observed
in P. cf. P. stellimicans of Reitner (1992, p. 152): tabulae microstructure similar to tubule filling; tubule walls inferred to be Mg calcite, tylostyle megasclera (500–800 µm long), arranged in bundles of 5 or 6 in the basal skeleton, reflecting a relict radial structure; microscleres unknown.
References
Schlüter, Clemens. 1885. Über einige neue Anthozoen aus dem Devon. Naturhistorischen Vereins Preussischen Rheinlande und Westfalens, Verhandlungen, Sitzungsberichte der Niederrheinische Gesellschaft für Natur- und Heilkunde, Jahrgang 42:144-151.
Museum or Author Information
Classification
Phylum:
Porifera
Class:
Demospongiae
Order:
Hadromerida
Family:
Suberitidae
Formal Genus Name and Reference:
Pachytheca SCHLÜTER, 1885, p. 144
Type Species:
Images
(Click to enlarge in a new window)
Fig. 137a–c. *P. stellimicans, Eifelian, western Germany; a, transverse section of paralectotype, X20; b, longitudinal section of lectotype, X18.7; c, longitudinal section showing penicillate, water-jet (fascicular fibrous) microstructure of lectotype, X21 (Birenheide, 1985, pl. 1). --Fig. 138a–c. P. cf. P. stellimicans, Eifelian, northern Spain; a, calcite pseudomorph of tylostyle megasclere, X204; b, diagrammatic sketch of tylostyle megasclere, X270; c, diagrammatic reconstruction of basal skeleton, X52.5 (Reitner, 1992, p. 153, fig. 30, pl. 22, 6 ).
Synonyms
Geographic Distribution
Middle Devonian: Germany (Eifel), Great Britain, Russia (northern Urals).
Age Range
Beginning Stage in Treatise Usage:
Middle Devonian
Beginning International Stage:
Eifelian
Fraction Up In Beginning Stage:
0
Beginning Date:
394.3
Ending Stage in Treatise Usage:
Middle Devonian
Ending International Stage:
Givetian
Fraction Up In Ending Stage:
100
Ending Date:
378.9
Description
Growth form laminar, tubules polygonal in transverse section, long and thin longitudinally, most tubules filled with secondary calcite, as in Ceratoporella, microstructure penicillate water-jet (fascicular fibrous). [The following was observed
in P. cf. P. stellimicans of Reitner (1992, p. 152): tabulae microstructure similar to tubule filling; tubule walls inferred to be Mg calcite, tylostyle megasclera (500–800 µm long), arranged in bundles of 5 or 6 in the basal skeleton, reflecting a relict radial structure; microscleres unknown.
References
Schlüter, Clemens. 1885. Über einige neue Anthozoen aus dem Devon. Naturhistorischen Vereins Preussischen Rheinlande und Westfalens, Verhandlungen, Sitzungsberichte der Niederrheinische Gesellschaft für Natur- und Heilkunde, Jahrgang 42:144-151.