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Basic arrangement of spider eyes, viewed from above. Most spiders have eight eyes, which tend to be arranged into two rows of four eyes on the head region. The eyes can be categorised by their location and are divided into the anterior median eyes (AME), anterior lateral eyes (ALE), posterior median eyes (PME), and posterior lateral eyes (PLE).
Spiders also have several adaptations that distinguish them from other arachnids. All spiders are capable of producing silk of various types, which many species use to build webs to ensnare prey. Most spiders possess venom, which is injected into prey (or defensively, when the spider feels threatened) through the fangs of the chelicerae. Male ...
Telemidae, also known as long-legged cave spiders, is a family of small haplogyne spiders. Most are cave dwelling spiders with six eyes, though some do not have any eyes at all. Most are cave dwelling spiders with six eyes, though some do not have any eyes at all.
The outer pair are "secondary eyes" and there are other pairs of secondary eyes on the sides and top of its head. [25] Eyes of the jumping spider, Plexippus paykulli. Spiders have primarily four pairs of eyes on the top-front area of the cephalothorax, arranged in patterns that vary from one family to another. [13]
Spiders do not have compound eyes, but instead have several pairs of simple eyes with each pair adapted for a specific task or tasks. The principal and secondary eyes in spiders are arranged in four, or occasionally fewer, pairs. Only the principal eyes have moveable retinas. The secondary eyes have a reflector at the back of the eyes.
Whether you’ve got a can of bacon grease at the ready or you’re Team Butter, we won’t be swearing off the fats when we’re cooking around here.
Forest Spiders of South East Asia: With a Revision of the Sac and Ground Spiders. Brill Publishers. ISBN 978-9004119598. Eaton, Eric R.; Kaufman, Kenn (2007). Kaufman Field Guide to Insects of North America. Houghton Mifflin Harcourt. ISBN 978-0618153107. Filmer, Martin R. (1991). Southern African Spiders: An Identification Guide. Random House.
Being a pet owner comes with many joys. But if you're hoping to spark some positive change in your pet's life, and give some joy back, that's where New Year's resolutions for pet owners can step ...