-
Lower GSSP
ratified 2000
Upper boundary definition FAD of the
Graptolite Akidograptus ascensus Upper boundary GSSP Dob's Linn, Moffat, U.K. 55°26′24″N 3°16′12″W...
- span
formality Formal Lower boundary definition FAD of the
Graptolite Akidograptus ascensus Lower boundary GSSP Dob's Linn, Moffat,
United Kingdom 55°26′24″N...
- base was
originally defined as the
first appearance of the
graptolite Akidograptus ascensus at Dob's Linn, but was
later discovered to be imprecise. It...
- span
formality Formal Lower boundary definition FAD of the
graptolite Akidograptus ascensus Lower boundary GSSP Dob's Linn, Moffat, U.K. 55°26′24″N 3°16′12″W...
- as the
first appearance of
graptolites Parakidograptus a****inatus and
Akidograptus ascensu 1.6 m
above the base of the
Birkhill Shale Formation. The shale...
- an
extinct family of graptolites. List of
genera from
Maletz (2014): †
Akidograptus Davies, 1929 †Avitograptus
Melchin et al., 2011 †Bulmanograptus Přibyl...
-
ratified 2006
Upper boundary definition First appearance of the
graptolite Akidograptus ascensus Upper boundary GSSP Dob's Linn, Moffat, U.K. 55°26′24″N 3°16′12″W...
- Moffat, Dumfries-shire, Scotland, U.K. Biologic:
First appearance of
Akidograptus ascensus and
Parakidograptus a****inatus (Graptolite). 1.6 m
above the...
-
Valentinagraptus Retiolitidae,
Subfamily Plectograptinae Piras, 2006
Akidograptus Dimorphograptidae Davies, 1929
Avitograptus Dimorphograptidae Melchin...
- †Agathammina †Agetolites †Aglaoglypta †Agoniatites –
tentative report †
Akidograptus †
Akidograptus a****inatus †Alaskacirrus – type
locality for
genus †Alaskacirrus...
