Welcome to the Treatise on Invertebrate Paleontology!
Please enter a genera name to retrieve more information.
Etagraptus
Classification
Phylum:
Hemichordata
Class:
Pterobranchia
Order:
Graptoloidea
Superfamily:
Unknown
Family:
Sigmargraptidae
Formal Genus Name and Reference:
Etagraptus RUEDEMANN, 1904, p. 644
Type Species:
*Tetragraptus (Etagraptus) lentus, M
Images
(Click to enlarge in a new window)
Fig. 170,2 a.* E. lentus, syntype, NYSM 6064, scale bar, 1 mm (new), Fig. 170,2b-c. E. tenuissimus (Harris & Thomas, 1942), holotype, NMV P32110, along with detail of thecal style (c), Chewtonian 2 (Lower Ordovician) Campbelltown, Allotment 41 B , Victoria, Australia, scale bars, 1 mm (VandenBerg, 2008a, Atlas, Folio, 2.35)
Synonyms
Geographic Distribution
Australia, New Zealand, Norway, Sweden, China, Canada, USA
Age Range
Beginning Stage in Treatise Usage:
Lower Ordovician (Floian, Didymograptellus bifidus Biozone)
Beginning International Stage:
Floian
Fraction Up In Beginning Stage:
0
Beginning Date:
477.08
Ending Stage in Treatise Usage:
Middle Ordovician (Dapingian, Isograptus maximodivergens Biozone)
Ending International Stage:
Dapingian
Fraction Up In Ending Stage:
0
Ending Date:
469.42
Description
Four-stiped to multiramous horizontal sigmagraptines with simple thecae and low thecal inclination, proximal development isograptid, dextral, branching regular
References
Ruedemann, Rudolf. 1904. Graptolites of New York, Part 1. New York State Museum Memoir 7:455-803.
Museum or Author Information
Classification
Phylum:
Hemichordata
Class:
Pterobranchia
Order:
Graptoloidea
Superfamily:
Unknown
Family:
Sigmargraptidae
Formal Genus Name and Reference:
Etagraptus RUEDEMANN, 1904, p. 644
Type Species:
*Tetragraptus (Etagraptus) lentus, M
Images
(Click to enlarge in a new window)
Fig. 170,2 a.* E. lentus, syntype, NYSM 6064, scale bar, 1 mm (new), Fig. 170,2b-c. E. tenuissimus (Harris & Thomas, 1942), holotype, NMV P32110, along with detail of thecal style (c), Chewtonian 2 (Lower Ordovician) Campbelltown, Allotment 41 B , Victoria, Australia, scale bars, 1 mm (VandenBerg, 2008a, Atlas, Folio, 2.35)
Synonyms
Geographic Distribution
Australia, New Zealand, Norway, Sweden, China, Canada, USA
Age Range
Beginning Stage in Treatise Usage:
Lower Ordovician (Floian, Didymograptellus bifidus Biozone)
Beginning International Stage:
Floian
Fraction Up In Beginning Stage:
0
Beginning Date:
477.08
Ending Stage in Treatise Usage:
Middle Ordovician (Dapingian, Isograptus maximodivergens Biozone)
Ending International Stage:
Dapingian
Fraction Up In Ending Stage:
0
Ending Date:
469.42
Description
Four-stiped to multiramous horizontal sigmagraptines with simple thecae and low thecal inclination, proximal development isograptid, dextral, branching regular
References
Ruedemann, Rudolf. 1904. Graptolites of New York, Part 1. New York State Museum Memoir 7:455-803.