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Canthigaster amboinensis, commonly known as the Ambon pufferfish, the Ambon toby, or the spider-eye puffer, is a species of pufferfish of the family Tetraodontidae. The species is commonly seen in the tropical Indo-Pacific Ocean, including Australia, Indonesia, Japan, Papua New Guinea, Taiwan and the Hawaiian Islands . [ 2 ]
Hogna wolf spider (family Lycosidae) showing the enlarged posterior median eyes typical of the family. The eyes of spiders vary significantly in their structure, arrangement, and function. They usually have eight, each being a simple eye with a single lens rather than multiple units as in the compound eyes of insects. The specific arrangement ...
Canthigaster amboinensis (Bleeker, 1865) (Spider-eye puffer) Spider-eye puffer (Canthigaster amboinensis) Canthigaster axiologus Whitley, 1931 (Pacific crown toby) Canthigaster aziz Matsuura, Bogorodsky, Mal & Alpermann 2020 (Aziz's toby) [4] Canthigaster bennetti (Bleeker, 1854) (Bennett's sharpnose puffer) Canthigaster callisterna (J. D ...
Eyes: The basic number of eyes is eight, typically arranged in two rows (e.g. as in Gnaphosidae); the front row are the anterior eyes, the row behind the posterior eyes; the four eyes to the edges are the lateral eyes, the four eyes in the centre the median eyes; the anterior median eyes are called the main eyes or direct eyes, while the other ...
Six-eyed spiders are spiders that, unlike most spider species, lack the principal pair of eyes, leaving them with only six eyes instead of the usual eight. [ 1 ] List
Females can reach a body length of 22 mm, males up to 15 mm. This species is much darker than others of the same genus. While subadult spiders have a greyish opisthosoma with a marking similar to Segestria senoculata, adults are of a uniform black, sometimes with a green iridescent shine, especially on the chelicerae, [2] which reflect with a striking green.
Selenops is a spider genus that is found in many arid regions of the world, but some species may also be found in some cooler and even mountainous regions. Most of the 132 species (as of May. 2021) are hard to visually distinguish, and requires study of their finer anatomy.
The eye arrangement of spiders in the genus Dysdera. Adults have a reddish-brown body and legs, and can grow up to 2 centimetres (0.79 in) long. Females are generally larger growing from 1.1 to 1.5 centimetres (0.43 to 0.59 in), while males are about 0.9 to 1 centimetre (0.35 to 0.39 in). [4]