Welcome to the Treatise on Invertebrate Paleontology!
Please enter a genera name to retrieve more information.
Herrmannograptus
Classification
Phylum:
Hemichordata
Class:
Pterobranchia
Order:
Graptoloidea
Superfamily:
Unknown
Family:
Dichograptidae
Formal Genus Name and Reference:
Herrmannograptus MONSEN, 1937, p. 186
Type Species:
*Graptolithus milesi Hall in HAGER, 1861a, p. 372, OD
Images
(Click to enlarge in a new window)
Fig. 188,1a-e. { }^{*} H. milesi (Hall in Hager), 1a, lectotype, AMNH 433/1, scale bar, 10 \mathrm{~mm}, 1 b-e, juvenile specimens from type slab, showing astogeny, sicular bitheca visible in 1 e, float, Monkton, Vermont, USA, scale bars, 1 mm (Lindholm & Maletz, 1989, fig. 4).
Synonyms
Geographic Distribution
USA
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:
Lower Ordovician (Floian, ?Paratetragraptus approximatus Biozone)
Ending International Stage:
Floian
Fraction Up In Ending Stage:
0
Ending Date:
471.26
Description
Multiramous dichograptid with a funicle formed by two first-order stipes comprised of two thecae each, up to seven or more orders of dichotomy with second and later dichotomies delayed, proximal end with sicular bitheca, bithecae lacking along stipes, thecae simple with slight rutellum
References
Monsen, Astrid. 1937. Die Graptolithenfauna im Unteren Didymograptusschiefer (Phyllograptusschiefer) Norwegens. Norsk Geologisk Tidsskrift 16(2-4):57-267.
Museum or Author Information
Classification
Phylum:
Hemichordata
Class:
Pterobranchia
Order:
Graptoloidea
Superfamily:
Unknown
Family:
Dichograptidae
Formal Genus Name and Reference:
Herrmannograptus MONSEN, 1937, p. 186
Type Species:
*Graptolithus milesi Hall in HAGER, 1861a, p. 372, OD
Images
(Click to enlarge in a new window)
Fig. 188,1a-e. { }^{*} H. milesi (Hall in Hager), 1a, lectotype, AMNH 433/1, scale bar, 10 \mathrm{~mm}, 1 b-e, juvenile specimens from type slab, showing astogeny, sicular bitheca visible in 1 e, float, Monkton, Vermont, USA, scale bars, 1 mm (Lindholm & Maletz, 1989, fig. 4).
Synonyms
Geographic Distribution
USA
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:
Lower Ordovician (Floian, ?Paratetragraptus approximatus Biozone)
Ending International Stage:
Floian
Fraction Up In Ending Stage:
0
Ending Date:
471.26
Description
Multiramous dichograptid with a funicle formed by two first-order stipes comprised of two thecae each, up to seven or more orders of dichotomy with second and later dichotomies delayed, proximal end with sicular bitheca, bithecae lacking along stipes, thecae simple with slight rutellum
References
Monsen, Astrid. 1937. Die Graptolithenfauna im Unteren Didymograptusschiefer (Phyllograptusschiefer) Norwegens. Norsk Geologisk Tidsskrift 16(2-4):57-267.