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Meekopora
Classification
Phylum:
Bryozoa
Subphylum:
Ectoprocta
Class:
Gymnolaemata
Order:
Cystoporata
Suborder:
Fistuliporina
Family:
Hexagonellidae
Formal Genus Name and Reference:
Meekopora Ulrich in MILLER, 1889, p. 312
Type Species:
Fistulipora? clausa ULRICH, 1884, p. 47, M, U. 1b Miss., Sloans Valley, Ky., USA
Images
(Click to enlarge in a new window)
Fig. 201, 1a-e. *M. clausa (Ulrich), a, closely spaced diaphragms in endozone and inner exozone, vesicles decreasing in height outward, stereom at surface, long. sec., lectotype, USNM 159834, x20, b, thin mesotheca, boxlike to hemispherical autozooecia, large vesicles in endozone, stereom at surface, transv. sec., lectotype, x20, c, crushed endozone, autozooecia isolated by blisterlike vesicles in exozone, distal "wall"' of autozooecium (right center) of superimposed vesicle walls; long. sec., paralectotype, USNM 159835, X30; d, elongate autozooecia narrowly isolated by small vesicles; tang. sec., paralectotype, USNM 159836, X30; e, solid monticular center, autozooecia with peristomes and lunaria; paralectotype, USNM 159837, x10.
Synonyms
Geographic Distribution
Miss., N.Am., Asia
Age Range
Beginning Stage in Treatise Usage:
Miss.
Beginning International Stage:
Tournaisian
Fraction Up In Beginning Stage:
0
Beginning Date:
359.3
Ending Stage in Treatise Usage:
Miss.
Ending International Stage:
Serpukhovian
Fraction Up In Ending Stage:
100
Ending Date:
323.4
Description
Zoarium narrow, bifoliate, branching, Monticules depressed, central cluster of vesicular tissue or stereom and ring of slightly larger zooecia, Autozooecia with peristomes and lunaria, Mesotheca thin, granular-prismatic, Autozooecia at mesotheca narrow, boxlike to hemispherical in cross section, partially to completely isolated by vesicular tissue, Walls granular-prismatic, tubuli in cortex, locally, lateral and distal walls replaced by superimposed vesicle walls, Diaphragms thin, closely spaced in endozone and inner exozone, planar to cystoidal, some off-centered funnel cystiphragms, Lunaria in endozone and exozone, dark granular boundary continuous into boundary of autozooecial wall, granular-prismatic layer slightly thicker proximally, may have tubuli, Vesicular tissue decreasing in height to low blisters in exozone, local zones of thicker vesicle roofs and thin stereom, granular-prismatic, with tubuli in roofs and stereom.
References
Miller, S. A., 1889, North American Geology and Paleontology for the Use of Amateurs, Students, and Scientists: 664 p., 1194 text-fig., Western Methodist Book Concern (Cincinnati).
Museum or Author Information
Classification
Phylum:
Bryozoa
Subphylum:
Ectoprocta
Class:
Gymnolaemata
Order:
Cystoporata
Suborder:
Fistuliporina
Family:
Hexagonellidae
Formal Genus Name and Reference:
Meekopora Ulrich in MILLER, 1889, p. 312
Type Species:
Fistulipora? clausa ULRICH, 1884, p. 47, M, U. 1b Miss., Sloans Valley, Ky., USA
Images
(Click to enlarge in a new window)
Fig. 201, 1a-e. *M. clausa (Ulrich), a, closely spaced diaphragms in endozone and inner exozone, vesicles decreasing in height outward, stereom at surface, long. sec., lectotype, USNM 159834, x20, b, thin mesotheca, boxlike to hemispherical autozooecia, large vesicles in endozone, stereom at surface, transv. sec., lectotype, x20, c, crushed endozone, autozooecia isolated by blisterlike vesicles in exozone, distal "wall"' of autozooecium (right center) of superimposed vesicle walls; long. sec., paralectotype, USNM 159835, X30; d, elongate autozooecia narrowly isolated by small vesicles; tang. sec., paralectotype, USNM 159836, X30; e, solid monticular center, autozooecia with peristomes and lunaria; paralectotype, USNM 159837, x10.
Synonyms
Geographic Distribution
Miss., N.Am., Asia
Age Range
Beginning Stage in Treatise Usage:
Miss.
Beginning International Stage:
Tournaisian
Fraction Up In Beginning Stage:
0
Beginning Date:
359.3
Ending Stage in Treatise Usage:
Miss.
Ending International Stage:
Serpukhovian
Fraction Up In Ending Stage:
100
Ending Date:
323.4
Description
Zoarium narrow, bifoliate, branching, Monticules depressed, central cluster of vesicular tissue or stereom and ring of slightly larger zooecia, Autozooecia with peristomes and lunaria, Mesotheca thin, granular-prismatic, Autozooecia at mesotheca narrow, boxlike to hemispherical in cross section, partially to completely isolated by vesicular tissue, Walls granular-prismatic, tubuli in cortex, locally, lateral and distal walls replaced by superimposed vesicle walls, Diaphragms thin, closely spaced in endozone and inner exozone, planar to cystoidal, some off-centered funnel cystiphragms, Lunaria in endozone and exozone, dark granular boundary continuous into boundary of autozooecial wall, granular-prismatic layer slightly thicker proximally, may have tubuli, Vesicular tissue decreasing in height to low blisters in exozone, local zones of thicker vesicle roofs and thin stereom, granular-prismatic, with tubuli in roofs and stereom.
References
Miller, S. A., 1889, North American Geology and Paleontology for the Use of Amateurs, Students, and Scientists: 664 p., 1194 text-fig., Western Methodist Book Concern (Cincinnati).