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Lituigraptus
Classification
Phylum:
Hemichordata
Class:
Pterobranchia
Order:
Graptoloidea
Superfamily:
Neograptina
Family:
Monograptidae
Formal Genus Name and Reference:
Lituigraptus Ni, 1978, p. 412, ex Rastrites (Lituigraptus) NI, 1978, p. 412
Type Species:
*Rastrites (Lituigraptus) glomeratus, OD
Images
(Click to enlarge in a new window)
Fig. 300,4a-d. P. convolutus (Hisinger), 4a, holotype, NRM Cn 68951, Furudal, Dalarna, Sweden (Hisinger, 1837, pl. 35.7), 4b, medium-sized specimen with thecal apertures, BB 697, Tmaň, Czech Republic (Štorch, 1998a, fig. 11.7 B ), 4c, proximal end with sicula, PŠ 724, Tmaň, Czech Republic (Štorch, 1998a, fig. 11,7D), 4 d, holotype of { }^{*} L. glomeratus Ni , 1978, NIGP 45401 (Nı, 1978, fig. 7.7). Scale bars, 1 mm
Synonyms
Corymbites
Geographic Distribution
worldwide
Age Range
Beginning Stage in Treatise Usage:
Silurian, Llandovery (Aeronian, Demirastrites simulans Biozone)
Beginning International Stage:
Aeronian
Fraction Up In Beginning Stage:
0
Beginning Date:
440.49
Ending Stage in Treatise Usage:
Silurian, Llandovery (Telychian, Spirograptus guerichi Biozone)
Ending International Stage:
Telychian
Fraction Up In Ending Stage:
0
Ending Date:
432.93
Description
Dorsally enrolled spiral tubarium, distally tubarium axis may gradually twist and thecae may be situated ventrally or perpendicular to spiral plane, proximal thecae rastritiform, with threadlike prothecae and straight, tubular metathecae with hooded apertures, mesially thecae gradually become high triangular, apertural hoods gradually retreat being substituted by prominent paired, ventrally to ventro-proximally directed, lateral processes
References
Ni , Yunan. 1978. Lower Silurian graptolites from Yichang, western Hubei. Acta Palaeontologica Sinica 17(4):387-416. In Chinese.
Museum or Author Information
Classification
Phylum:
Hemichordata
Class:
Pterobranchia
Order:
Graptoloidea
Superfamily:
Neograptina
Family:
Monograptidae
Formal Genus Name and Reference:
Lituigraptus Ni, 1978, p. 412, ex Rastrites (Lituigraptus) NI, 1978, p. 412
Type Species:
*Rastrites (Lituigraptus) glomeratus, OD
Images
(Click to enlarge in a new window)
Fig. 300,4a-d. P. convolutus (Hisinger), 4a, holotype, NRM Cn 68951, Furudal, Dalarna, Sweden (Hisinger, 1837, pl. 35.7), 4b, medium-sized specimen with thecal apertures, BB 697, Tmaň, Czech Republic (Štorch, 1998a, fig. 11.7 B ), 4c, proximal end with sicula, PŠ 724, Tmaň, Czech Republic (Štorch, 1998a, fig. 11,7D), 4 d, holotype of { }^{*} L. glomeratus Ni , 1978, NIGP 45401 (Nı, 1978, fig. 7.7). Scale bars, 1 mm
Synonyms
Corymbites
Geographic Distribution
worldwide
Age Range
Beginning Stage in Treatise Usage:
Silurian, Llandovery (Aeronian, Demirastrites simulans Biozone)
Beginning International Stage:
Aeronian
Fraction Up In Beginning Stage:
0
Beginning Date:
440.49
Ending Stage in Treatise Usage:
Silurian, Llandovery (Telychian, Spirograptus guerichi Biozone)
Ending International Stage:
Telychian
Fraction Up In Ending Stage:
0
Ending Date:
432.93
Description
Dorsally enrolled spiral tubarium, distally tubarium axis may gradually twist and thecae may be situated ventrally or perpendicular to spiral plane, proximal thecae rastritiform, with threadlike prothecae and straight, tubular metathecae with hooded apertures, mesially thecae gradually become high triangular, apertural hoods gradually retreat being substituted by prominent paired, ventrally to ventro-proximally directed, lateral processes
References
Ni , Yunan. 1978. Lower Silurian graptolites from Yichang, western Hubei. Acta Palaeontologica Sinica 17(4):387-416. In Chinese.