• Recently, a fossil unearthed in central Montana (US) of a species named Syllipsimopodibideni represents the oldest-known relative of today’s octopuses and boasts 10 arms, with two twice as long as the other eight.
  • It has been named after the US president, Joe Biden.

Characteristics of the Species

  • Syllipsimopodi, about 12 cm long, had a torpedo-shaped body and squid-like appearance though it was not closely related to squids.
  • It also is the oldest-known creature with suckers, which enable the arms to better grasp prey and other objects.
  • It represents the only member of the octopus lineage with 10 arms, meaning two were lost in later evolution.
  • There are numerous similar examples in the history of life on Earth – such as the reduction in the number of digits seen in meat-eating dinosaurs or horses.
  • Syllipsimopodi prowled the warm waters of a tropical bay – Montana at the time was situated close to the equator. It may have been a mid-level predator, eating smaller invertebrates.
  • It drifted across oceans nearly 328m years ago.
  • Syllipsimopodi pushes back by 82 million years the origins of a group called vampyropods that includes today’s octopuses.
  • Vampyropods are soft-bodied cephalopods typically characterized by eight arms and an internalized chitinous shell or fin supports.
  • Cephalopods are a group of marine invertebrates that include octopuses, squids and cuttlefish.
  • Vampyropoda, the clade combining octopods, vampyromorphs, and their relatives, is one of three main groups of coleoid (internally-shelled) cephalopods, the other two being Decabrachia (squids, cuttlefishes, bobtail squids, and Spirula) and the extinct Belemnoidea.

Characteristics of the Octopuses

  • Octopuses are the most intelligent invertebrates, and among the most intelligent animals overall.
  • Octopuses are ocean creatures that are most famous for having eight arms and bulbous heads.
  • They have three hearts and blue blood; they squirt ink to deter predators; and being boneless, they can squeeze into (or out of) tight spaces.


About ChinmayaIAS Academy - Current Affairs

Check Also

What to do with spent nuclear fuel?

Syllabus:  Alternate fuel Context: Japan has started releasing treated radioactive water from the beleaguered Fukushima …

Leave a Reply

Your email address will not be published. Required fields are marked *

Get Free Updates to Crack the Exam!
Subscribe to our Newsletter for free daily updates