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Rectograptus
Classification
Phylum:
Hemichordata
Class:
Pterobranchia
Subclass:
Graptolithina
Order:
Graptoloidea
Suborder:
Axonophora
Infraorder:
Diplograptina
Family:
Diplograptidae
Subfamily:
Peiragraptinae
Formal Genus Name and Reference:
Rectograptus PŘIBYL, 1949, p. 25
Type Species:
*Diplograptus pristis var. truncatus LAPWORTH, 1877, p. 133, OD
Images
(Click to enlarge in a new window)
Fig. 232,2a. *R. truncatus (Lapworth) holotype (Lapworth, 1877, pl. 6,17a specimen not identified, see Strachan, 1997, p. 72)._—Fig. 232,2 b- d. R. gracilis (Roemer, 1861), 2b, neotype, GPIT 1056 / 3, infrared photo, scale bar, 1 mm (Eisenack 1959, fig. 1), 2c-d, NRM-PZ Cn 654, 885, isolated specimens, glacial boulder, Sweden, scale bars, 1 mm (Bulman, 1932a, pl. 7,11 and 7,10, respectively).
Synonyms
Geographic Distribution
worldwide
Age Range
Beginning Stage in Treatise Usage:
Upper Ordovician (Sandbian, Climacograptus bicornis Biozone)
Beginning International Stage:
Sandbian
Fraction Up In Beginning Stage:
0
Beginning Date:
458.18
Ending Stage in Treatise Usage:
Upper Ordovician (Hirnantian, Paraorthograptus pacificus Biozone)
Ending International Stage:
Hirnantian
Fraction Up In Ending Stage:
100
Ending Date:
443.07
Description
Peiragraptines with square proximal end, distally widening or largely parallel-sided tubarium, prominent antivirgellar spines and subapertural spine on th $1^{1}$ but not on th $1^{2}$, thecae with or without geniculum on proximal thecae or straight, outward-inclined ventral thecal walls and straight, everted apertures, sometimes with low lateral lappets on thecal apertures that may be lost distally, median septum lacking, proximal development of pattern G astogeny
References
Přibyl, Alois. 1949. Revision of the Diplograptidae and Glossograptidae of the Ordovician of Bohemia. Bulletin Internationale de l'Académie Tchèque des Sciences 50:1-51.
Museum or Author Information
Classification
Phylum:
Hemichordata
Class:
Pterobranchia
Subclass:
Graptolithina
Order:
Graptoloidea
Suborder:
Axonophora
Infraorder:
Diplograptina
Family:
Diplograptidae
Subfamily:
Peiragraptinae
Formal Genus Name and Reference:
Rectograptus PŘIBYL, 1949, p. 25
Type Species:
*Diplograptus pristis var. truncatus LAPWORTH, 1877, p. 133, OD
Images
(Click to enlarge in a new window)
Fig. 232,2a. *R. truncatus (Lapworth) holotype (Lapworth, 1877, pl. 6,17a specimen not identified, see Strachan, 1997, p. 72)._—Fig. 232,2 b- d. R. gracilis (Roemer, 1861), 2b, neotype, GPIT 1056 / 3, infrared photo, scale bar, 1 mm (Eisenack 1959, fig. 1), 2c-d, NRM-PZ Cn 654, 885, isolated specimens, glacial boulder, Sweden, scale bars, 1 mm (Bulman, 1932a, pl. 7,11 and 7,10, respectively).
Synonyms
Geographic Distribution
worldwide
Age Range
Beginning Stage in Treatise Usage:
Upper Ordovician (Sandbian, Climacograptus bicornis Biozone)
Beginning International Stage:
Sandbian
Fraction Up In Beginning Stage:
0
Beginning Date:
458.18
Ending Stage in Treatise Usage:
Upper Ordovician (Hirnantian, Paraorthograptus pacificus Biozone)
Ending International Stage:
Hirnantian
Fraction Up In Ending Stage:
100
Ending Date:
443.07
Description
Peiragraptines with square proximal end, distally widening or largely parallel-sided tubarium, prominent antivirgellar spines and subapertural spine on th $1^{1}$ but not on th $1^{2}$, thecae with or without geniculum on proximal thecae or straight, outward-inclined ventral thecal walls and straight, everted apertures, sometimes with low lateral lappets on thecal apertures that may be lost distally, median septum lacking, proximal development of pattern G astogeny
References
Přibyl, Alois. 1949. Revision of the Diplograptidae and Glossograptidae of the Ordovician of Bohemia. Bulletin Internationale de l'Académie Tchèque des Sciences 50:1-51.