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Stomatograptus
Classification
Phylum:
Hemichordata
Class:
Pterobranchia
Order:
Graptoloidea
Superfamily:
Neograptina
Family:
Retiolitidae
Formal Genus Name and Reference:
Stomatograptus TULLBERG, 1883, p. 42
Type Species:
*S. toernquisti, M, =Retiolites grandis Suess, 1851, p. 99, see TÖRNQUIST, 1890, p. 8
Images
(Click to enlarge in a new window)
Fig. 281,1a-b. S. grandis (Suess), 1a, neotype, NM L31630 (selected by Štorch, Serpagli, \& Barca, 2002, p. 102), Llandovery, upper Telychian, Cyrtograptus lapworthi Biozone, Prague region, Czech Republic (new), 1b, GSC 78432, thecal fusellar floors partially preserved, Llandovery, Cyrtograptus centrifugus or Cyrtograptus murchisoni Biozone, Arctic Canada (new). Scale bars, 1 mm, ——Fig. 281, Ic. S. canadensis Lenz, 1988c, GSC, Llandovery, Cyrtograptus sakmaricus Biozone, Arctic Canada, scale bar, 1 mm (new), ——Fig. 281,1 d-e.* S. toernquisti, 1 d, holotype, LO 481T, Röstånga, Scania, Sweden, 1e, LO 482t, Motala, Östergötland, Sweden (specimen missing), scale bars, 1 mm (Tullberg, 1883, pl. 1)
Synonyms
Retiolites
Geographic Distribution
worldwide
Age Range
Beginning Stage in Treatise Usage:
Silurian, Llandovery (Telychian, Spirograptus turriculatus Biozone)
Beginning International Stage:
Telychian
Fraction Up In Beginning Stage:
0
Beginning Date:
438.59
Ending Stage in Treatise Usage:
Wenlock (lower Homerian, Cyrtograptus lundgreni Biozone)
Ending International Stage:
Homerian
Fraction Up In Ending Stage:
0
Ending Date:
428.68
Description
Tubarium gradually widening initially, ancora umbrella bowl-shaped with hexagonal meshwork, prosicula present, nema with connecting lists, transverse lists present, ventral walls defined by thecal lips, strongly inclined lateral apertural lists and pleural lists, pleural lists attached to middle part of outwardinclined lateral apertural lists, ancora sleeve well developed with polygonal meshes, narrow external common canal with stomata, ancora sleeve lists with seams facing outward, bandages finely striated
References
Tullberg, S. A. 1883. Skånes Graptoliter II. Graptolitfaunorna i Cardiolaskiffern och Cyrtograptusskiffern. Sveriges Geologiska Undersökning. Afhandlingar och uppsatser (serie C) 55:1-43, 4 pl .
Museum or Author Information
Classification
Phylum:
Hemichordata
Class:
Pterobranchia
Order:
Graptoloidea
Superfamily:
Neograptina
Family:
Retiolitidae
Formal Genus Name and Reference:
Stomatograptus TULLBERG, 1883, p. 42
Type Species:
*S. toernquisti, M, =Retiolites grandis Suess, 1851, p. 99, see TÖRNQUIST, 1890, p. 8
Images
(Click to enlarge in a new window)
Fig. 281,1a-b. S. grandis (Suess), 1a, neotype, NM L31630 (selected by Štorch, Serpagli, \& Barca, 2002, p. 102), Llandovery, upper Telychian, Cyrtograptus lapworthi Biozone, Prague region, Czech Republic (new), 1b, GSC 78432, thecal fusellar floors partially preserved, Llandovery, Cyrtograptus centrifugus or Cyrtograptus murchisoni Biozone, Arctic Canada (new). Scale bars, 1 mm, ——Fig. 281, Ic. S. canadensis Lenz, 1988c, GSC, Llandovery, Cyrtograptus sakmaricus Biozone, Arctic Canada, scale bar, 1 mm (new), ——Fig. 281,1 d-e.* S. toernquisti, 1 d, holotype, LO 481T, Röstånga, Scania, Sweden, 1e, LO 482t, Motala, Östergötland, Sweden (specimen missing), scale bars, 1 mm (Tullberg, 1883, pl. 1)
Synonyms
Retiolites
Geographic Distribution
worldwide
Age Range
Beginning Stage in Treatise Usage:
Silurian, Llandovery (Telychian, Spirograptus turriculatus Biozone)
Beginning International Stage:
Telychian
Fraction Up In Beginning Stage:
0
Beginning Date:
438.59
Ending Stage in Treatise Usage:
Wenlock (lower Homerian, Cyrtograptus lundgreni Biozone)
Ending International Stage:
Homerian
Fraction Up In Ending Stage:
0
Ending Date:
428.68
Description
Tubarium gradually widening initially, ancora umbrella bowl-shaped with hexagonal meshwork, prosicula present, nema with connecting lists, transverse lists present, ventral walls defined by thecal lips, strongly inclined lateral apertural lists and pleural lists, pleural lists attached to middle part of outwardinclined lateral apertural lists, ancora sleeve well developed with polygonal meshes, narrow external common canal with stomata, ancora sleeve lists with seams facing outward, bandages finely striated
References
Tullberg, S. A. 1883. Skånes Graptoliter II. Graptolitfaunorna i Cardiolaskiffern och Cyrtograptusskiffern. Sveriges Geologiska Undersökning. Afhandlingar och uppsatser (serie C) 55:1-43, 4 pl .