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 .
Dicranopalpus ramosus , a harvestman found in southern coastal parts of Ireland.[1]
Oligolophus tridens , a harvestman found all over Ireland.[2]
Chelifer cancroides , a pseudoscorpion found in Ireland. The abdomen is short and rounded at the rear, rather than extending into a segmented tail and stinger like a true scorpion , of which there are none in Ireland.[3]
Ixodes ricinus , the castor bean tick, which spreads the pathogens that cause Lyme disease and tick-borne encephalitis .[1]
Trombidium holosericeum , a red velvet mite that lives in soil and feeds on insects.[4]
Pholcus phalangioides , the skull spider, found in County Kerry.[5]
Egg sac of Ero furcata , a pirate spider found in coastal parts of Ireland.[6]
Female snake-back spider (Segestria senoculata ).[7]
European cave spider (Meta menardi ), recorded in Kerry.
A female Enoplognatha ovata on a daisy ; this spider is found in coastal parts of Ireland, especially in the southeast.[8]
Giant house spider (Eratigena atrica ), common in the Midlands.[9]
Clubiona trivialis , a sac spider very common in the Midlands.[10]
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 .