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The Opiliones (formerly Phalangida) are an order of arachnids colloquially known as harvestmen, harvesters, harvest spiders, or daddy longlegs. As of April 2017, over 6,650 species of harvestmen have been discovered worldwide, although the total number of extant species may exceed 10,000.
Nov 17, 2023 · Unlike spiders, harvestmen lack venom glands associated with their chelicerae (mouthparts). Uniquely among the arachnids fertilization is direct: males of most taxa possess a penis (also referred to in the literature as pene, aedagus or intromittent organ).
The Opiliones (formerly Phalangida) are an order of arachnids colloquially known as harvestmen, harvesters, or daddy longlegs. According to the most updated count, over 6,660 species of harvestmen have been discovered worldwide, although the total number of extant species may exceed 10,000.
The Phalangida (Opiliones) of New York, with special reference to the species of the Edmund Niles Huyck Preserve, Rensselaerville, New York. Rochester Academy of Science. Proceedings 9: 159–235.
Goodnight, CJ & ML Goodnight, 1942. New Phalangodidae (Phalangida) from the United States. American Museum Novitates, New York, 1188: 1-18.
A male Phalangium opilio, showing the distinguishable long legs. Harvestment or opiliones comprise the order Opiliones in the class Arachnida in the subphylum Chelicerata of the phylum Arthropoda. Arachnida is a largely terrestrial group that also includes spiders, mites, ticks, and scorpions.
In the United States, research in the Order Phalangida (Order Opil- iones) has been concerned primarily with taxonomy, as seen in the contri- butions by C. Ril. Weed, N. Banks, C. R. Crosby, and others. Tlle phalangids of some states have been studied systematically, notably those of New York (Bishop, 1919) and Ohio (Walker, 1928).
