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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.
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 newly discovered long-extinct species is described as a “large spider-like arachnid” with “distinctive large spines on the legs” by the study’s authors.
From 8-eyed spiders to a new species resembling a “miniature dragon.” ... Two new species of spiders with “medically significant” venom were discovered in Yunnan Province, China, according ...
New species of funnel-web spider found in Newcastle has been dubbed ‘Big Boy’ ... one of the world’s deadliest spiders – and found there were three species, ...
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.
They are “medium to large spiders” ranging from about 0.4 inches to about 2 inches. They are believed to be responsible for about 13 envenomation deaths before the creation of antivenom in 1981.