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Plectograptus
Classification
Phylum:
Hemichordata
Class:
Pterobranchia
Subclass:
Graptolithina
Order:
Graptoloidea
Suborder:
Axonophora
Infraorder:
Neograptina
Superfamily:
Retiolitoidea
Family:
Retiolitidae
Subfamily:
Retiolitinae
Formal Genus Name and Reference:
Plectograptus Moberg & TÖRNQUIST, 1909, p. 18
Type Species:
*Retiolites macilentus TÖRNQUIST, 1887, p. 491, OD
Images
(Click to enlarge in a new window)
Fig. 279, 1a-b. { }^{*} P. macilentus (Törnquist), neotype, SMF XXIV 433, photograph and line drawing of specimen, Ludlow, Gorstian, Neodiversograptus nilssoni Biozone, Wetterahammer, Thuringia, Germany, scale bars, 1 mm (Bates & others, 2006, fig. 1), ——Fig. 279,1c. P. robustus (Obut & Zaslavskaya, 1983), holotype, CNIGR 251/42-2, chemically isolated specimen, scale bar, 1 mm (Obut & Zaslavskaya, 1986, fig. 1)
Synonyms
Agastograptus
Geographic Distribution
worldwide
Age Range
Beginning Stage in Treatise Usage:
Silurian, Ludlow (Gorstian, Neodiversograptus)
Beginning International Stage:
Gorstian
Fraction Up In Beginning Stage:
0
Beginning Date:
426.74
Ending Stage in Treatise Usage:
Ludlow (Gorstian, Lobograptus scanicus Biozone)
Ending International Stage:
Gorstian
Fraction Up In Ending Stage:
100
Ending Date:
425.01
Description
Tubarium parallel sided or narrowing distally, shallow ancora umbrella with five meshes and only partially developed rim, nema free, may bear a nematularium, large proximal lateral orifices of tubarium width, ventral sides formed by thecal lips, genicular lists, lateral apertural lists, pleural lists, and mid-ventral lists, single or paired genicular processes in some species, reticulum well developed to absent, zigzag parietal list lists, ancora sleeve lists with seams facing inward, bandages with pustules
References
Moberg, J. C., & S. L. Törnquist. 1909. Retiolitoidea från Skånes Colonusskiffer. Sveriges Geologiska Undersökning C213:1-20.
Museum or Author Information
Classification
Phylum:
Hemichordata
Class:
Pterobranchia
Subclass:
Graptolithina
Order:
Graptoloidea
Suborder:
Axonophora
Infraorder:
Neograptina
Superfamily:
Retiolitoidea
Family:
Retiolitidae
Subfamily:
Retiolitinae
Formal Genus Name and Reference:
Plectograptus Moberg & TÖRNQUIST, 1909, p. 18
Type Species:
*Retiolites macilentus TÖRNQUIST, 1887, p. 491, OD
Images
(Click to enlarge in a new window)
Fig. 279, 1a-b. { }^{*} P. macilentus (Törnquist), neotype, SMF XXIV 433, photograph and line drawing of specimen, Ludlow, Gorstian, Neodiversograptus nilssoni Biozone, Wetterahammer, Thuringia, Germany, scale bars, 1 mm (Bates & others, 2006, fig. 1), ——Fig. 279,1c. P. robustus (Obut & Zaslavskaya, 1983), holotype, CNIGR 251/42-2, chemically isolated specimen, scale bar, 1 mm (Obut & Zaslavskaya, 1986, fig. 1)
Synonyms
Agastograptus
Geographic Distribution
worldwide
Age Range
Beginning Stage in Treatise Usage:
Silurian, Ludlow (Gorstian, Neodiversograptus)
Beginning International Stage:
Gorstian
Fraction Up In Beginning Stage:
0
Beginning Date:
426.74
Ending Stage in Treatise Usage:
Ludlow (Gorstian, Lobograptus scanicus Biozone)
Ending International Stage:
Gorstian
Fraction Up In Ending Stage:
100
Ending Date:
425.01
Description
Tubarium parallel sided or narrowing distally, shallow ancora umbrella with five meshes and only partially developed rim, nema free, may bear a nematularium, large proximal lateral orifices of tubarium width, ventral sides formed by thecal lips, genicular lists, lateral apertural lists, pleural lists, and mid-ventral lists, single or paired genicular processes in some species, reticulum well developed to absent, zigzag parietal list lists, ancora sleeve lists with seams facing inward, bandages with pustules
References
Moberg, J. C., & S. L. Törnquist. 1909. Retiolitoidea från Skånes Colonusskiffer. Sveriges Geologiska Undersökning C213:1-20.