|Arkys sp. from New Guinea|
L. Koch, 1872
|2 genera, 43 species|
Arkyidae is a family of araneomorph spiders first described by Ludwig Carl Christian Koch in 1872 as a subfamily of Araneidae, and later elevated to a full family in 2017.
Family is one of the eight major hierarchical taxonomic ranks in Linnaean taxonomy; it is classified between order and genus. A family may be divided into subfamilies, which are intermediate ranks between the ranks of family and genus. The official family names are Latin in origin; however, popular names are often used: for example, walnut trees and hickory trees belong to the family Juglandaceae, but that family is commonly referred to as being the "walnut family".
The Araneomorphae are an infraorder of spiders. They are distinguished by having chelicerae (fangs) that point diagonally forward and cross in a pinching action, in contrast to the Mygalomorphae, where they point straight down. Most of the spiders that people encounter in daily life belong to the Araneomorphae.
Spiders are air-breathing arthropods that have eight legs and chelicerae with fangs able to inject venom. They are the largest order of arachnids and rank seventh in total species diversity among all orders of organisms. Spiders are found worldwide on every continent except for Antarctica, and have become established in nearly every habitat with the exceptions of air and sea colonization. As of November 2015, at least 45,700 spider species, and 113 families have been recorded by taxonomists. However, there has been dissension within the scientific community as to how all these families should be classified, as evidenced by the over 20 different classifications that have been proposed since 1900.
As of April 2019 [update] , the World Spider Catalog accepts the following genera:
The World Spider Catalog (WSC) is an online searchable database concerned with spider taxonomy. It aims to list all accepted families, genera and species, as well as provide access to the related taxonomic literature. The WSC began as a series of individual web pages in 2000, created by Norman I. Platnick of the American Museum of Natural History. After Platnick's retirement in 2014, the Natural History Museum of Bern (Switzerland) took over the catalog, converting it to a relational database.
Arkys, also known as triangular spider or ambush spider, is a genus of Australian araneomorph spiders in the Arkyidae family, first described by Charles Athanase Walckenaer in 1837. They are often small, with a triangular shaped abdomen, and can be found in Australia and some of its surrounding islands. They don't build webs, but can often be found on leaves and tips of flower heads. Their egg sacs are pinkish-orange and spherical, and are made late in the summer.
Arkys curtulus, the small bird dropping spider, is a small spider found in eastern Australia.) It is usually seen resting on leaves waiting for prey to come near, commonly feasting on soldier flies. Colours and patterns vary considerably, ranging from cream, orange, mottled, brown or black.
Arkys lancearius, the triangular spider, is a common Australian spider belonging to the family Arkyidae. It is an ambush hunter, commonly found resting on leaves and ferns or hanging from just a few threads of silk. The front two pairs of legs are large, suited for grabbing small insects, while the rear pairs of legs are much smaller.
Demadiana is a genus of spiders in the Arkyidae family. It was first described in 1929 by Strand. As of 2017, it contains 6 species, all from Australia.
In zoological nomenclature, a type species is the species name with which the name of a genus or subgenus is considered to be permanently taxonomically associated, i.e., the species that contains the biological type specimen(s). A similar concept is used for suprageneric groups called a type genus.
The genus Argiope includes rather large spiders that often have a strikingly coloured abdomen. These spiders are distributed throughout the world. Most countries in tropical or temperate climates host one or more species that are similar in appearance. The etymology of Argiope is from a Latin word argentum meaning silver. The carapace of Argiope species is typically covered in silvery hairs.
Spiny orb-weavers is a common name for Gasteracantha, a genus of spiders. They are also commonly called spiny-backed orb-weavers, due to the prominent spines on their abdomen. These spiders can reach sizes of up to 3 cm (1.2 in) in diameter. Although their abdomen is shaped like a crab shell with spikes, it is not to be confused with a crab spider.
Holoplatys is a genus of the spider family Salticidae.
Omoedus is a spider genus of the Salticidae family.
Cyrtophora, the tent-web spiders, although technically orb-web spiders, do not build orb webs. Their tent-like, highly complex non-sticky web is sometimes considered a precursor of the simplified orb web. These webs are aligned horizontally, with a network of supporting threads above them. These spiders often live in colonies. Females have a body length of mostly about 10 mm.
The spider genus Aname is endemic to Australia, with one species found only on Tasmania. It contains the black wishbone spider, A. atra.
Carepalxis is a genus of orb-weaver spiders first described by Ludwig Carl Christian Koch in 1872. These spiders only build webs at night and break them down in the morning. C. coronata builds orb webs up to 60 centimetres (24 in) in diameter with closely woven spiral threads.
Storena is a genus of ant spiders first described by Charles Athanase Walckenaer in 1805.
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