giant water scorpion

giant water scorpion

▪ arthropod order
also called  sea scorpion  

      any member of the extinct subclass Eurypterida of the arthropod group Merostomata, a lineage of large, scorpion-like, aquatic invertebrates that flourished during the Silurian Period (444 to 416 million years ago). Well over 200 species have been identified and divided into 18 families. They include the largest arthropod species known, Jaekelopterus rhenaniae (also called Pterygotus rhenanius or P. buffaloenis), which measures nearly 2.5 metres (8 feet) in length. Several other eurypterid forms were almost as large. The fossils of giant water scorpions are usually found in brackish and freshwater deposits, but the animals probably first lived in shallow coastal areas and estuaries and moved into freshwater environments later. Only a few species appear to have been good swimmers. They are presumed to have been fearsome predators, with large grasping pincers that may have entrapped early vertebrates and various shelled animals. Their distant relative, the horseshoe crab of the order Xiphosura, has survived to the present day.

* * *

Universalium. 2010.

Игры ⚽ Нужно сделать НИР?

Look at other dictionaries:

  • scorpion — scorpionic /skawr pee on ik/, adj. /skawr pee euhn/, n. 1. any of numerous arachnids of the order Scorpionida, widely distributed in warmer parts of the world, having a long, narrow, segmented tail that terminates in a venomous sting. 2. the… …   Universalium

  • water bug — noun 1. a true bug: large aquatic bug adapted to living in or on the surface of water • Hypernyms: ↑heteropterous insect • Hyponyms: ↑giant water bug, ↑water scorpion, ↑water boatman, ↑boat bug, ↑water strider, ↑ …   Useful english dictionary

  • water bug — (Roget s IV) n. Water bugs include: skipper, skater, water beetle, walking stick, water weevil, back swimmer, giant water bug, Croton bug, gerrid, water flea, water scorpion, water mantis, water scavenger, water treader, water boatman, water… …   English dictionary for students

  • Giant Arabian Deathstalker — The Giant Arabian Deathstalker ( Apistobuthus pterygocercus ) is a type of a rare scorpion species that can be easily identified by its unusually long and slender chela ( claws ) and the disk shaped segments on its metasoma ( tail ).Hunting and… …   Wikipedia

  • Scorpion — For other uses see Scorpion (disambiguation) Scorpion Temporal range: Silurian–Recent …   Wikipedia

  • Geology of Australia — Australia is a continent situated on the Indo Australian Plate.The geology of Australia includes virtually all known rock types and from all geological time periods spanning over 3.8 billion years of the Earth s history. ComponentsAustralia s… …   Wikipedia

  • Hibbertopterus — Zeitraum Unteres Karbon 330 Mio. Jahre Fundorte Schottland Systematik Gliederfüßer (Arthropoda) …   Deutsch Wikipedia

  • List of characters in the Camp Half-Blood series — This is a list of characters in the Percy Jackson the Olympians series and in the The Heroes of Olympus series. Contents 1 Main characters 1.1 Perseus Jackson 1.2 Annabeth Chase …   Wikipedia

  • List of Advanced Dungeons & Dragons 2nd edition monsters — See also: Lists of Dungeons Dragons monsters This is the list of Advanced Dungeons Dragons 2nd edition monsters, an important element of that role playing game.[1] This list only includes monsters from official Advanced Dungeons Dragons 2nd… …   Wikipedia

  • List of Advanced Dungeons & Dragons 1st edition monsters — This literature related list is incomplete; you can help by expanding it. See also: List of Dungeons Dragons monsters Contents 1 TSR 2009 Monster Manual (1977 …   Wikipedia

Share the article and excerpts

Direct link
Do a right-click on the link above
and select “Copy Link”