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Tetragraptus
Classification
Phylum:
Hemichordata
Class:
Pterobranchia
Order:
Graptoloidea
Superfamily:
Unknown
Family:
Phyllograptidae
Formal Genus Name and Reference:
Tetragraptus SALTER, 1863a, p. 140
Type Species:
*Graptolithus bryonoides Hall, 1858, p. 126, OD (=Tetragraptus serra Brongniart, 1828, p. 71, see Elles & WOOD, 1902, p. 66)
Images
(Click to enlarge in a new window)
Fig. 195,2a. * T. serra, lectotype, NHMUK PM 26995, Lévis, Quebec, Canada, scale bar, 1 mm (Cooper & Fortey, 1982, fig. 14), ——Fig. 195, 2b. T. bryonoides (Hall), lectotype, GSC 978, scale bar, 1 mm (Cooper & Fortey, 1982, fig. 16), ——Fig. 195, 2c. T. cor (Strandmark, 1902), SGU 3844, 1-2 preservation, scale bar, 1 mm (Cooper & Lindholm, 1985, fig. 3g), —Fig. 195,2d-e. T. phyllograptoides Strandmark, 1902, 2 d, LO 5377 t, specimen in 1-2 preser- vation, 2 e, LO 5372t, specimen in a-b preservation, scale bars, 1 mm (Cooper & Lindholm, 1985, fig. 1 m and 1c), -Fig. 195,2f-g. T. phyllograptoides triumphans Cooper & Fortey, 1982, 2f, PMO NF3303, juvenile in obverse view, 2 g, PMO NF 3181, proximal end in reverse view showing massive crossing canals, scale bars, 1 mm (Cooper & Fortey, 1982, fig. 22c and 22g, respectively)
Synonyms
Geographic Distribution
worldwide
Age Range
Beginning Stage in Treatise Usage:
Lower Ordovician (Floian, Paratetragraptus approximatus Biozone)
Beginning International Stage:
Floian
Fraction Up In Beginning Stage:
0
Beginning Date:
477.08
Ending Stage in Treatise Usage:
Middle Ordovician (Darriwilian, Pterograptus elegans Biozone)
Ending International Stage:
Darriwilian
Fraction Up In Ending Stage:
0
Ending Date:
458.18
Description
Phyllograptid with four horizontal to reclined, reflexed, and scandent stipes, proximal end isograptid, dextral, with wide crossing canals and tetragraptid proximal end, thecae with considerable overlap and moderate development of rutellum
References
Salter, J. W. 1863a. Note on the Skiddaw Slate fossils. Quarterly Journal of the Geological Society, London 19:135-140.
Museum or Author Information
Classification
Phylum:
Hemichordata
Class:
Pterobranchia
Order:
Graptoloidea
Superfamily:
Unknown
Family:
Phyllograptidae
Formal Genus Name and Reference:
Tetragraptus SALTER, 1863a, p. 140
Type Species:
*Graptolithus bryonoides Hall, 1858, p. 126, OD (=Tetragraptus serra Brongniart, 1828, p. 71, see Elles & WOOD, 1902, p. 66)
Images
(Click to enlarge in a new window)
Fig. 195,2a. * T. serra, lectotype, NHMUK PM 26995, Lévis, Quebec, Canada, scale bar, 1 mm (Cooper & Fortey, 1982, fig. 14), ——Fig. 195, 2b. T. bryonoides (Hall), lectotype, GSC 978, scale bar, 1 mm (Cooper & Fortey, 1982, fig. 16), ——Fig. 195, 2c. T. cor (Strandmark, 1902), SGU 3844, 1-2 preservation, scale bar, 1 mm (Cooper & Lindholm, 1985, fig. 3g), —Fig. 195,2d-e. T. phyllograptoides Strandmark, 1902, 2 d, LO 5377 t, specimen in 1-2 preser- vation, 2 e, LO 5372t, specimen in a-b preservation, scale bars, 1 mm (Cooper & Lindholm, 1985, fig. 1 m and 1c), -Fig. 195,2f-g. T. phyllograptoides triumphans Cooper & Fortey, 1982, 2f, PMO NF3303, juvenile in obverse view, 2 g, PMO NF 3181, proximal end in reverse view showing massive crossing canals, scale bars, 1 mm (Cooper & Fortey, 1982, fig. 22c and 22g, respectively)
Synonyms
Geographic Distribution
worldwide
Age Range
Beginning Stage in Treatise Usage:
Lower Ordovician (Floian, Paratetragraptus approximatus Biozone)
Beginning International Stage:
Floian
Fraction Up In Beginning Stage:
0
Beginning Date:
477.08
Ending Stage in Treatise Usage:
Middle Ordovician (Darriwilian, Pterograptus elegans Biozone)
Ending International Stage:
Darriwilian
Fraction Up In Ending Stage:
0
Ending Date:
458.18
Description
Phyllograptid with four horizontal to reclined, reflexed, and scandent stipes, proximal end isograptid, dextral, with wide crossing canals and tetragraptid proximal end, thecae with considerable overlap and moderate development of rutellum
References
Salter, J. W. 1863a. Note on the Skiddaw Slate fossils. Quarterly Journal of the Geological Society, London 19:135-140.