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Coscinotrypa
Classification
Phylum:
Bryozoa
Subphylum:
Ectoprocta
Class:
Gymnolaemata
Order:
Cystoporata
Suborder:
Fistuliporina
Family:
Hexagonellidae
Formal Genus Name and Reference:
Coscinotrypa HALL, 1886, pl. 29
Type Species:
Clathropora carinata HALL, 1883a, pl. 26, M, M. Dev., Falls of the Ohio, Jeffersonville, Ind., USA
Images
(Click to enlarge in a new window)
FIG. 198, la-g. "'c. carinata (HALL); a, frond with small fenestrules and broken branch, cotype, WM 13986:no fragment number, x1, b, frond with large fenestrules, cotype, WM 13986:f.33, x1, c, branch with lunaria on side of autozooecium away from branch centerline, cotype, WM 13986:f.32, x10, d, undulatory mesotheca, branch at high angle to frond, stereom in exozone, transv. sec., cotype, WM 13986:f.35, x30, e, thick, undulatory mesotheca, hemispherical autozooecia with keel and sinuses in outer endozone, transv. sec., Jeffersonville F., Ind., SIUC 3010, x30, f, laminated walls, laminated stereom with acanthostyles, lunaria on side of autozooecia away from branch midline (horizontal), tang. sec., Jeffersonville F., SIUC 3009, x30, g, thick mesotheca, autozooecia decrease in diameter from endozone to exozone, long. sec., cotype, WM 13986:f.35, X30
Synonyms
Geographic Distribution
M.Dev., N.Am.
Age Range
Beginning Stage in Treatise Usage:
M. Dev.
Beginning International Stage:
Eifelian
Fraction Up In Beginning Stage:
0
Beginning Date:
394.3
Ending Stage in Treatise Usage:
M. Dev.
Ending International Stage:
Givetian
Fraction Up In Ending Stage:
100
Ending Date:
378.9
Description
Zoarium bifoliate, cribrate, fenestrules bordered by rim of solid stereom, lunaria radially arranged around fenestrules, branches symmetrical with lunaria on side of autozooecia away from branch center. Mesotheca trilayered, median layer dark, lateral layers laminated and having tubuli. Mesotheca regularly undulatory in transverse view. Autozooecia contiguous at mesotheca, hemispherical in cross section, with keel and sinuses, size decreasing from endozone to exozone. Walls laminated, with tubuli. Lunaria in outer endozone and exozone, radius of curvature short, producing trilobed autozooecial cross section, hyaline or distinctly laminated. Vesicular tissue forming large blisters in outer endozone, low blisters in inner exozone, stereom in most of exozone, laminated, with numerous small acanthostyles.
References
Hall, James, ,, ,, ,, 1886, Bryozoa of the Upper Helderberg group; plates and explanations: State Geologist of New York, 5th Annu. Rep. for 1885, pl. 25-53.
Museum or Author Information
Classification
Phylum:
Bryozoa
Subphylum:
Ectoprocta
Class:
Gymnolaemata
Order:
Cystoporata
Suborder:
Fistuliporina
Family:
Hexagonellidae
Formal Genus Name and Reference:
Coscinotrypa HALL, 1886, pl. 29
Type Species:
Clathropora carinata HALL, 1883a, pl. 26, M, M. Dev., Falls of the Ohio, Jeffersonville, Ind., USA
Images
(Click to enlarge in a new window)
FIG. 198, la-g. "'c. carinata (HALL); a, frond with small fenestrules and broken branch, cotype, WM 13986:no fragment number, x1, b, frond with large fenestrules, cotype, WM 13986:f.33, x1, c, branch with lunaria on side of autozooecium away from branch centerline, cotype, WM 13986:f.32, x10, d, undulatory mesotheca, branch at high angle to frond, stereom in exozone, transv. sec., cotype, WM 13986:f.35, x30, e, thick, undulatory mesotheca, hemispherical autozooecia with keel and sinuses in outer endozone, transv. sec., Jeffersonville F., Ind., SIUC 3010, x30, f, laminated walls, laminated stereom with acanthostyles, lunaria on side of autozooecia away from branch midline (horizontal), tang. sec., Jeffersonville F., SIUC 3009, x30, g, thick mesotheca, autozooecia decrease in diameter from endozone to exozone, long. sec., cotype, WM 13986:f.35, X30
Synonyms
Geographic Distribution
M.Dev., N.Am.
Age Range
Beginning Stage in Treatise Usage:
M. Dev.
Beginning International Stage:
Eifelian
Fraction Up In Beginning Stage:
0
Beginning Date:
394.3
Ending Stage in Treatise Usage:
M. Dev.
Ending International Stage:
Givetian
Fraction Up In Ending Stage:
100
Ending Date:
378.9
Description
Zoarium bifoliate, cribrate, fenestrules bordered by rim of solid stereom, lunaria radially arranged around fenestrules, branches symmetrical with lunaria on side of autozooecia away from branch center. Mesotheca trilayered, median layer dark, lateral layers laminated and having tubuli. Mesotheca regularly undulatory in transverse view. Autozooecia contiguous at mesotheca, hemispherical in cross section, with keel and sinuses, size decreasing from endozone to exozone. Walls laminated, with tubuli. Lunaria in outer endozone and exozone, radius of curvature short, producing trilobed autozooecial cross section, hyaline or distinctly laminated. Vesicular tissue forming large blisters in outer endozone, low blisters in inner exozone, stereom in most of exozone, laminated, with numerous small acanthostyles.
References
Hall, James, ,, ,, ,, 1886, Bryozoa of the Upper Helderberg group; plates and explanations: State Geologist of New York, 5th Annu. Rep. for 1885, pl. 25-53.