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Stylothalamia
Classification
Phylum:
Porifera
Class:
Demospongea
Order:
Vaceletida
Superfamily:
Pileolitoidea
Family:
Verticillitidae
Formal Genus Name and Reference:
Stylothalamia OTT, 1967a, p. 44
Type Species:
S. dehmi, OD
Images
(Click to enlarge in a new window)
Fig. 476a-c. *S. dehmi, Raibler beds, Carnian, Karwendel, Austria, a, transverse section of lower part of holotype with porous walls of circular chambers around narrow spongocoel, and with widely spaced, radial pillars in chambers, 4 mm above base of sponge, BSPGM G 416 a/67, X4, b, transverse section of holotype above that of view a, with chamber wall cut tangentially near center where pores are well shown, and sections of pillars relatively uniformly distributed in inner two chambers, around spongocoel, 6 mm above base of sponge, BSPGM G 418 a/67, X4, c, schematic, longitudinal section showing position of transverse sections, view a at level 2 and view b at level 4 (Ott, 1967a, courtesy of Neues Jahrbuch für Geologie und Paläontologie, Monatshefte).
Synonyms
Menathalamia
Geographic Distribution
China (Hubei), Guadalupian, Europe, Turkey, Iran, Tajikistan, Triassic, Peru, Morocco, Iran, Lower Jurassic, USA (Texas), Upper Cretaceous
Age Range
Beginning Stage in Treatise Usage:
Permian (Guadalupian)
Beginning International Stage:
Roadian
Fraction Up In Beginning Stage:
0
Beginning Date:
274.37
Ending Stage in Treatise Usage:
Upper Cretaceous
Ending International Stage:
Maastrichtian
Fraction Up In Ending Stage:
100
Ending Date:
66.04
Description
Broadly conical with narrow, central cloaca or without cloaca; chambers low; widely spaced, vertical pillars may branch upwardly, of circular cross section, sometimes hollow, their lumen connecting with that of overlying chamber; imperforate vesicles may be present in earlier chambers; endopores, interpores, and exopores essentially the same, mostly small, closely spaced, and ranging from circular to elongate to subpolygonal or lobate; a few larger, circular pores may be present; trabecular microstructure a feltwork of aragonite needles of vaceletid type (CUIF & others, 1979, p. 460); no spicules known. [Genus is similar to Vaceletia PICKETT , 1982.]
References
Ott, Ernst. 1967a. Segmentierte Kalkschwämme (Sphinctozoa) aus der alpinen Mitteltrias und ihre Bedeutung als Riffbildner im Wettersteinkalk. Bayerische Akademie der Wissenschaften Mathematisch-Naturwissenschaftliche Klasse, Abhandlungen (new series) 131:96 p., fig. 1-9, 10 pl.
Museum or Author Information
Classification
Phylum:
Porifera
Class:
Demospongea
Order:
Vaceletida
Superfamily:
Pileolitoidea
Family:
Verticillitidae
Formal Genus Name and Reference:
Stylothalamia OTT, 1967a, p. 44
Type Species:
S. dehmi, OD
Images
(Click to enlarge in a new window)
Fig. 476a-c. *S. dehmi, Raibler beds, Carnian, Karwendel, Austria, a, transverse section of lower part of holotype with porous walls of circular chambers around narrow spongocoel, and with widely spaced, radial pillars in chambers, 4 mm above base of sponge, BSPGM G 416 a/67, X4, b, transverse section of holotype above that of view a, with chamber wall cut tangentially near center where pores are well shown, and sections of pillars relatively uniformly distributed in inner two chambers, around spongocoel, 6 mm above base of sponge, BSPGM G 418 a/67, X4, c, schematic, longitudinal section showing position of transverse sections, view a at level 2 and view b at level 4 (Ott, 1967a, courtesy of Neues Jahrbuch für Geologie und Paläontologie, Monatshefte).
Synonyms
Menathalamia
Geographic Distribution
China (Hubei), Guadalupian, Europe, Turkey, Iran, Tajikistan, Triassic, Peru, Morocco, Iran, Lower Jurassic, USA (Texas), Upper Cretaceous
Age Range
Beginning Stage in Treatise Usage:
Permian (Guadalupian)
Beginning International Stage:
Roadian
Fraction Up In Beginning Stage:
0
Beginning Date:
274.37
Ending Stage in Treatise Usage:
Upper Cretaceous
Ending International Stage:
Maastrichtian
Fraction Up In Ending Stage:
100
Ending Date:
66.04
Description
Broadly conical with narrow, central cloaca or without cloaca; chambers low; widely spaced, vertical pillars may branch upwardly, of circular cross section, sometimes hollow, their lumen connecting with that of overlying chamber; imperforate vesicles may be present in earlier chambers; endopores, interpores, and exopores essentially the same, mostly small, closely spaced, and ranging from circular to elongate to subpolygonal or lobate; a few larger, circular pores may be present; trabecular microstructure a feltwork of aragonite needles of vaceletid type (CUIF & others, 1979, p. 460); no spicules known. [Genus is similar to Vaceletia PICKETT , 1982.]
References
Ott, Ernst. 1967a. Segmentierte Kalkschwämme (Sphinctozoa) aus der alpinen Mitteltrias und ihre Bedeutung als Riffbildner im Wettersteinkalk. Bayerische Akademie der Wissenschaften Mathematisch-Naturwissenschaftliche Klasse, Abhandlungen (new series) 131:96 p., fig. 1-9, 10 pl.