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The generic name, composed of the Ancient Greek μέγας (megas) meaning "great" and Ancient Greek ἀράχνη (arachne) meaning "spider", translates to "great spider"; because the fossil was misidentified as a large, prehistoric spider. With a body length of 54 cm (21 in), Megarachne was a medium-sized eurypterid.
Among the oldest known land arthropods are Trigonotarbids, members of an extinct order of spider-like arachnids. [5]Trigonotarbids share many superficial characteristics with spiders, including a terrestrial lifestyle, respiration through book lungs, and walking on eight legs, [6] with a pair of leg-like pedipalps near the mouth and mouth parts.
The Mesothelae are a suborder of spiders (order Araneae). As of April 2024, two extant families were accepted by the World Spider Catalog, Liphistiidae and Heptathelidae. Alternatively, the Heptathelidae can be treated as a subfamily of a more broadly circumscribed Liphistiidae. There are also a number of extinct families.
Mongolarachne is an extinct genus of spiders placed in the monogeneric family Mongolarachnidae.The genus contains only one species, Mongolarachne jurassica, described in 2013, which is presently the largest fossilized spider on record. [1]
The trachea were originally connected to the surroundings through a pair of openings called spiracles, but in the majority of spiders this pair of spiracles has fused into a single one in the middle, and moved backwards close to the spinnerets. [13] Spiders that have tracheae generally have higher metabolic rates and better water conservation. [17]
The idea of coming face to face with any spider-like creature is enough to fill any arachnophobe with horror, let alone encountering one with large, spiky legs.
The study was launched after Mr Christensen, based at the Australian Reptile Park in New South Wales, collected a number of “unusually large male funnel-web spiders” as part of a venom ...
Image credits: Chester Zoo “Ten years ago we helped release THOUSANDS of GIANT spiders back into the UK!” read the zoo’s social media post last week. “The fen raft spiders were bred right ...