Didymograptus

Didymograptus is an extinct genus of graptolites with four rows of cups. They lived during the Middle Ordovician,[1] to Late Ordovician.[2]

Didymograptus
Temporal range: Middle Ordovician
~478–443 Ma
Didymograptus murchisoni, Wales
Scientific classification
Kingdom:
Animalia
Phylum:
Hemichordata
Class:
†Graptolithinia
Genus:
†Didymograptus

McCoy 1851
  • D. artus
  • D. euodus
  • D. gracilis
  • D. murchisoni
  • D. nicholsoni

Distribution

Fossils of Didymograptus have been found in Argentina, Australia, Bolivia, Canada (Northwest Territories, Quebec, Yukon, Newfoundland and Labrador), Chile, China, Colombia (Tarqui, Huila),[3] the Czech Republic, Estonia, France, Iran, Morocco, New Zealand, Norway, Peru, Portugal, the Russian Federation, Saudi Arabia, Spain, Sweden, the United Kingdom, the United States (Alaska, California, Idaho, Nevada, New York, Utah), and Venezuela.[2]

gollark: That would involve parsing.
gollark: ```python @bot.command(help="Roll simulated dice (basic NdX syntax, N <= 50, X <= 1e6).") async def roll(ctx, dice): match = re.match("([-0-9]*)d([0-9]+)", dice) if not match: raise ValueError("Invalid dice notation") n, x = match.groups() if n == "": n = 1 n, x = int(n), int(x) if n > 50 or x > 1e6: raise ValueError("N or X exceeds limit") rolls = [ random.randint(1, x) for _ in range(n) ] await ctx.send(f"{sum(rolls)} ({' '.join(map(str, sorted(rolls)))})")```
gollark: Nope.
gollark: Fiona's rolldice, while excellently something, could not be used safely on untrusted input.
gollark: No, it uses one (1) regular expression.

References
  1. Palmer, Douglas; et al. (2009). "Ordovician". Prehistoric Life: the Definitive Visual History of Life on Earth (first American ed.). New York City: DK Publishing. p. 89. ISBN 978-0-7566-5573-0.
  2. Didymograptus at Fossilworks.org
  3. Moreno et al., 2008, p.10

Bibliography


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