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Phaenopora
Classification
Phylum:
Bryozoa
Subphylum:
Ectoprocta
Class:
Gymnolaemata
Order:
Cryptostomata
Suborder:
Ptilodictyina
Family:
Ptilodictyidae
Formal Genus Name and Reference:
Phaenopora Hall, in Silliman, Silliman, & DANA, 1851, p. 399
Type Species:
Phaenopora explanata Hall, 1852, p. 46, SD ULRICH, 1890, p. 392, ?Cataract F., L. Sil., Flamborough Head, Ont., Can.
Images
(Click to enlarge in a new window)
Fig. 243, 1a. *P. explanata, lectotype, AMNH 1490, alignment of autozooecial ranges, external view, x5.-Fig. 243, 1 b-d. P. constellata Hall, ?Cataract F., Ont., b, straight autozooecial ranges, structurally continuous longitudinal walls, pairs of exilazooecia between successive autozooecia, and exilazooecia in groups between longitudinal walls, tang. sec., USNM 242618, x30, c, d, shape of living chambers, exilazooecia and sinuous mesotheca, superior and inferior hemisepta projecting into living chambers in endozone, long. sec., USNM 242617, x30, 100.
Synonyms
Geographic Distribution
M.Ord.-U.Sil., USSR, N.Am., Eng., Swed.
Age Range
Beginning Stage in Treatise Usage:
M.Ord.
Beginning International Stage:
Dapingian
Fraction Up In Beginning Stage:
0
Beginning Date:
471.26
Ending Stage in Treatise Usage:
U.Sil.
Ending International Stage:
Pridoli
Fraction Up In Ending Stage:
100
Ending Date:
419
Description
Zoarium branched or unbranched and explanate, Mesothecae sinuous in longitudinal section, Autozooecia in straight ranges throughout ontogeny, In exozones, autozooecia subrectangular in cross section, generally contiguous laterally, partially separated within ranges by exilazooecia, Autozooecia may be replaced by exilazooecia, Autozooecial boundaries generally not visible, Pustules indistinct, scattered in zoaria, Living chambers elliptical in cross section, generally without lining, Superior and inferior hemisepta common, regularly arranged, Superior hemisepta curved proximally, relatively long and thick, Inferior hemisepta extending from mesotheca, relatively thick, variable in length, Exilazooecia common, irregularly triangular to subcircular or elongate longitudinally in cross section, Exilazooecia regularly arranged in pairs or may be in short rows between successive autozooecia, Exilazooecia singly or in short rows in areas of bifurcation and margins, and in areas of replaced autozooecia, Monticules common in some zoaria, raised, consisting of exilazooecia and sparse zooecia. {Internal structure in type specimens of P. explanata is poorly preserved (Ross, 1960c, p. 1072; 1961a, p. 332); however, it is reasonable to assume that the internal structure in P. explanata was closely similar co that in P. constellata HALL and co that in the other ptilodictyid genera.]
References
Silliman, Benjamin, Silliman, Benjamin, Jr., \& Dana, J. D., 1851, New genera of fossil corals from the report of James Hall, on the paleontology of New York: Am. J. Sci. Arts, ser. 2, v. 11, p. 398401.
Museum or Author Information
Classification
Phylum:
Bryozoa
Subphylum:
Ectoprocta
Class:
Gymnolaemata
Order:
Cryptostomata
Suborder:
Ptilodictyina
Family:
Ptilodictyidae
Formal Genus Name and Reference:
Phaenopora Hall, in Silliman, Silliman, & DANA, 1851, p. 399
Type Species:
Phaenopora explanata Hall, 1852, p. 46, SD ULRICH, 1890, p. 392, ?Cataract F., L. Sil., Flamborough Head, Ont., Can.
Images
(Click to enlarge in a new window)
Fig. 243, 1a. *P. explanata, lectotype, AMNH 1490, alignment of autozooecial ranges, external view, x5.-Fig. 243, 1 b-d. P. constellata Hall, ?Cataract F., Ont., b, straight autozooecial ranges, structurally continuous longitudinal walls, pairs of exilazooecia between successive autozooecia, and exilazooecia in groups between longitudinal walls, tang. sec., USNM 242618, x30, c, d, shape of living chambers, exilazooecia and sinuous mesotheca, superior and inferior hemisepta projecting into living chambers in endozone, long. sec., USNM 242617, x30, 100.
Synonyms
Geographic Distribution
M.Ord.-U.Sil., USSR, N.Am., Eng., Swed.
Age Range
Beginning Stage in Treatise Usage:
M.Ord.
Beginning International Stage:
Dapingian
Fraction Up In Beginning Stage:
0
Beginning Date:
471.26
Ending Stage in Treatise Usage:
U.Sil.
Ending International Stage:
Pridoli
Fraction Up In Ending Stage:
100
Ending Date:
419
Description
Zoarium branched or unbranched and explanate, Mesothecae sinuous in longitudinal section, Autozooecia in straight ranges throughout ontogeny, In exozones, autozooecia subrectangular in cross section, generally contiguous laterally, partially separated within ranges by exilazooecia, Autozooecia may be replaced by exilazooecia, Autozooecial boundaries generally not visible, Pustules indistinct, scattered in zoaria, Living chambers elliptical in cross section, generally without lining, Superior and inferior hemisepta common, regularly arranged, Superior hemisepta curved proximally, relatively long and thick, Inferior hemisepta extending from mesotheca, relatively thick, variable in length, Exilazooecia common, irregularly triangular to subcircular or elongate longitudinally in cross section, Exilazooecia regularly arranged in pairs or may be in short rows between successive autozooecia, Exilazooecia singly or in short rows in areas of bifurcation and margins, and in areas of replaced autozooecia, Monticules common in some zoaria, raised, consisting of exilazooecia and sparse zooecia. {Internal structure in type specimens of P. explanata is poorly preserved (Ross, 1960c, p. 1072; 1961a, p. 332); however, it is reasonable to assume that the internal structure in P. explanata was closely similar co that in P. constellata HALL and co that in the other ptilodictyid genera.]
References
Silliman, Benjamin, Silliman, Benjamin, Jr., \& Dana, J. D., 1851, New genera of fossil corals from the report of James Hall, on the paleontology of New York: Am. J. Sci. Arts, ser. 2, v. 11, p. 398401.