Notidanoidei

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Lusitania sinking, illustration from The War of the Nations (New York), December 31, 1919. World War I, WWI. This image is one of three on the page. (See source file for the other two.)

7 of the World’s Deadliest Shipwrecks

Black widow spider

9 of the World’s Deadliest Spiders

Ahura Mazda - relief of the Zoroastrian god Ahura Mazda at the ancient ruins of Persepolis in Iran. Also known as Ormazd Zoroastrianism,

Which Religion Is the Oldest?

Nero (Nero Claudius Caesar Augustus Germanicus) (ad 50-54) the fifth Roman emperor (ad 54-68), stepson and heir of the emperor Claudius.

Did Nero Really Fiddle as Rome Burned?

The Colosseum, Rome, Italy. Giant amphitheatre built in Rome under the Flavian emperors. (ancient architecture; architectural ruins)

New Seven Wonders of the World

United States electoral college map showing number of electoral votes by state.

How Does the Electoral College Work?

Statue of Nostradamus

Nostradamus and His Prophecies

Notidanoidei

shark suborder

Learn about this topic in these articles:

annotated classification

In chondrichthyan: Annotated classification
Suborder NotidanoideiSharks having 6 or 7 gill openings. Anal fin present.Family Hexanchidae (cow sharks and 7-gilled sharks)Distinguished by presence of 6 gill slits; teeth of lower jaw strikingly unlike those of upper, the 5 or 6 on either side of the central tooth…
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