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Spider taxonomy. Spider taxonomy is the part of taxonomy that is concerned with the science of naming, defining and classifying all spiders, members of the Araneae order of the arthropod class Arachnida, which has more than 48,500 described species. [1] However, there are likely many species that have escaped the human eye as well as specimens ...
The number of eggs in a burrow varies somewhat, but has been recorded up to 157 eggs. The amount of time it takes eggs to hatch has been recorded at five weeks in one record. Roughly a month after hatching, the spiderlings leave the mothers burrow and dig their own. The spiders burrows are known to be around 8.9cm in length. [2]
Spiders have been evolving for at least 380 million years. The group's origins lie within an arachnid sub-group defined by the presence of book lungs (the tetrapulmonates); [1][2] the arachnids as a whole evolved from aquatic chelicerate ancestors. More than 45,000 extant species have been described, organised taxonomically in 3,958 genera and ...
External anatomy. The underside and head of a female spider. Spiders, unlike insects, have only two main body parts (tagmata) instead of three: a fused head and thorax (called a cephalothorax or prosoma) and an abdomen (also called an opisthosoma). The exception to this rule are the assassin spiders in the family Archaeidae, whose cephalothorax ...
Spiders (order Araneae) are air-breathing arthropods that have eight limbs, chelicerae with fangs generally able to inject venom, [ 2 ] and spinnerets that extrude silk. [ 3 ] They are the largest order of arachnids and rank seventh in total species diversity among all orders of organisms. [ 4 ][ 5 ] Spiders are found worldwide on every ...
600+ genera, 6000+ species. Jumping spiders are a group of spiders that constitute the family Salticidae. As of 2019, this family contained over 600 described genera and over 6,000 described species, [1] making it the largest family of spiders at 13% of all species. [2] Jumping spiders have some of the best vision among arthropods and use it in ...
Atypoidea is a clade of mygalomorph spiders, one of the two main groups into which the mygalomorphs are divided (the other being Avicularioidea ). It has been treated at the rank of superfamily. It contains five families of spiders: [1] [2] [3] Spiders from atypoid families live in burrows and use silk to build many different types of burrow ...
Orb-weaver spiders are members of the spider family Araneidae. They are the most common group of builders of spiral wheel-shaped webs often found in gardens, fields, and forests. The English word "orb" can mean "circular", [1] hence the English name of the group. Araneids have eight similar eyes, hairy or spiny legs, and no stridulating organs.
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