There are approximately 1,107 species of arachnid native to Ireland. [11] Not up to date for all taxa. Arachnids are eight-legged chelicerate arthropods with pedipalps and bodies divided into two tagmata.
The most best known and familiar group in Ireland is the spiders, and there are also several species of harvestman (daddy-long-legs), ticks, mites and pseudoscorpions. Arachnid groups absent from Ireland include true scorpions, whip scorpions, solifuges, cave spiders, microwhip scorpions, hooded tick spiders and tarantulas.
15 native species and three species which are not considered to be native: Odiella spinosus , Opilio parietinus (Phalangiidae) and Dicranopalpus ramosus (Leiobunidae)
17 species
At least 684 species
10 species
2 species
249 species
4 species
5 species
5 species
1 species
52 species [12]
7 species
2 species
3 species
44 species
1 species
2 species [13]
2 species
6 species
11 species
2 species
3 species
4 species
1 species
1 species
2 species
1 species
2 species
2 species
14 species
1 species
4 species
1 species
7 species
3 species
1 species
14 species
6 species
1 species
9 species
1 species
15 species
6 species
173 species have been identified for the Republic of Ireland
4 species
1 species
7 species
1 species
1 species
19 species
1 species
6 species
3 species
1 species
1species
2 species
7 species
2 species
1 species
6 species
4 species
4 species
2 species
1 species
4 species
5 species
12 species
4 species
1 species
1 species
3 species
1 species
2 species
1 species
1 species
1 species
4 species
2 species
1 species
1 species
1 species
16 species
3 species
7 species
1 species
8 species
1 species
1 species
1 species
1 species
2 species
2 species
2 species
6 species
1 species
2 species
1 species
390 species belonging to 31 families
Encyclopedia of Life online has many images via search Dictynoidea Placements
Theridiidae, also known as the tangle-web spiders, cobweb spiders and comb-footed spiders, is a large family of araneomorph spiders first described by Carl Jakob Sundevall in 1833. This diverse, globally distributed family includes over 3,000 species in 124 genera, and is the most common arthropod found in human dwellings throughout the world.
Tord Tamerlan Teodor Thorell was a Swedish arachnologist.
Xysticus is a genus of ground crab spiders described by C. L. Koch in 1835, belonging to the order Araneae, family Thomisidae. The genus name is derived from the Ancient Greek root xyst, meaning "scraped, scraper".
Drassodes is a genus of ground spiders that was first described by Niklas Westring in 1851. They are brown, gray, and red spiders that live under rocks or bark in mostly dry habitats, and are generally 3.8 to 11.6 millimetres long, but can reach up to 20 millimetres (0.79 in) in length.
This is a list of the known wild biota of the Isle of Man.
Tetragnatha is a genus of long-jawed orb-weavers found all over the world. It was first described by Pierre André Latreille in 1804, and it contains hundreds of species. Most occur in the tropics and subtropics, and many can run over water. They are commonly called stretch spiders in reference to their elongated body form and their ability to hide on blades of grass or similar elongated substrates by stretching their front legs forward and the others behind them. The name Tetragnatha is derived from Greek, tetra- a numerical prefix referring to four and gnatha meaning "jaw". Evolution to cursorial behavior occurred long ago in a few different species, the most studied being those found on the Hawaiian islands. One of the biggest and most common species is T. extensa, which has a holarctic distribution. It can be found near lakes, river banks or swamps. Large numbers of individuals can often be found in reeds, tall grass, and around minor trees and shrubs.
Pardosa is a large genus of wolf spiders, commonly known as the thin-legged wolf spiders. It was first described by C. L. Koch, in 1847, with more than 500 described species that are found in all regions of the world.
Walckenaeria is a genus of dwarf spiders that was first described by John Blackwall in 1833. It is a senior synonym of Paragonatium, as well as Wideria, Cornicularia, Prosopotheca, Tigellinus, and Trachynella.
Erigone is a genus of dwarf spiders that was first described by Jean Victoire Audouin in 1826. They are carnivorous, preying on small insects such as psylla and flies. One of the distinctive characters for this genus is the presence of teeth bordering the carapace.
Niklas Westring was a Swedish entomologist and arachnologist.
Micrargus is a genus of dwarf spiders that was first described by Friedrich Dahl in 1886.
Porrhomma is a genus of sheet weavers that was first described by Eugène Louis Simon in 1884.
Helsdingen, P.J. van, 1996 A county distribution of Irish spiders, incorporating a revised catalogue of the species Irish Naturalists' Journal Special Issue
Key works are:-
Peter C. Barnard, 1999 Identifying British insects and arachnids: an annotated bibliography of key works Cambridge University Press ISBN 0 521 63241 2 provides a comprehensive list of identification literature.