†family Isograptidae Harris 1933 (graptolite)

Pterobranchia - Graptoloidea - Isograptidae

Synonym: Arienigraptidae Yu and Fang 1981

Parent taxon: Glossograptina according to J. Maletz 2014

Sister taxa: Cyrtograptidae, Glossograptidae

Subtaxa: Cardiograptus Isograptus Parisograptus

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Ecology: passively mobile planktonic suspension feeder

Distribution:

• Ordovician of Argentina (4 collections), Australia (1), Bolivia (1), Canada (3: Newfoundland and Labrador, Quebec, Yukon), China (6), New Zealand (33), the Russian Federation (11), United States (11: Alaska, British Columbia, Idaho, New York, Texas)

• Llandeilo of China (1)

• Whiterockian of Canada (1: Newfoundland and Labrador)

• Castlemainian of New Zealand (8), United States (4: Idaho)

• Ningkuo of China (5)

• Arenig of China (9), Morocco (1), Norway (2), United States (1: Nevada)

• Arenigian of Canada (2: Northwest Territories), United States (1: Alaska)

Total: 105 collections including 164 occurrences

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