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What the sources say

European HarvestmanPhalangium opilio

Every figure, record and mechanism on the European Harvestman profile was written from a source, and this is the working table behind it: 35 claims checked word for word against these sources. The left column is what the page says. The right column is the source's own words, copied, not paraphrased; a ... marks a cut and[brackets] an insertion. Open any source and check it yourself.

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Source
01

Biological Control: A Guide to Natural Enemies in North America, Cornell University

Phalangium opilio. Biological Control: A Guide to Natural Enemies in North America, Cornell University.

The page saysa stilt-legged arachnid with a body roughly 3.5 to 9 millimeters long
The source saysThe most notable features of P. opilio and many other harvestmen are the long, slender legs and short, globular body. Adult body length is approximately 3.5-9 mmNote: tagline; 'stilt-legged' is figurative for the long slender legs
The page saysCrops and other disturbed ground across Europe and northern Asia, and introduced to Canada
The source saysP. opilio tends to be the most common in relatively disturbed habitats such as most crops in temperate regionsNote: stats.habitat, first half. Range halves are claimed from ITIS below.
The page saysAphids, caterpillars and other soft-bodied arthropods, and it may also eat dead insects, earthworms and other harvestmen
The source saysHarvestmen will feed on many soft bodied arthropods in crops, including aphids, caterpillars, leafhoppers, beetle larvae, mites, and small slugs.Note: stats.diet
The page saysit may also eat dead insects, earthworms and other harvestmen
The source saysP. opilio also may feed on dead insects and other decaying material, as well as earthworms, other harvestmen, spiders and other beneficial invertebrates
The page saysLong, slender legs and a short, globular body are the European harvestman's most notable features.
The source saysThe most notable features of P. opilio and many other harvestmen are the long, slender legs and short, globular body.
The page saysThat body is about 3.5 to 9 mm long in adults, and males are generally smaller than females.
The source saysAdult body length is approximately 3.5-9 mm, with males generally smaller than females.
The page saysLike a spider, a harvestman has two main body sections, eight legs and no antennae.
The source saysLike the spiders and most adult mites, harvestmen have two major body sections and eight legs and lack antennae.
The page saysUnlike a spider's, its two sections are broadly joined.
The source saysUnlike spiders, the two body sections of harvestmen are broadly joined
The page saysIn crops, harvestmen feed on many soft-bodied arthropods, such as aphids, caterpillars, leafhoppers, beetle larvae, mites and small slugs.
The source saysHarvestmen will feed on many soft bodied arthropods in crops, including aphids, caterpillars, leafhoppers, beetle larvae, mites, and small slugs.
The page saysP. opilio may also eat dead insects, earthworms, spiders and other harvestmen, and it has a tendency toward cannibalism.
The source saysP. opilio also may feed on dead insects and other decaying material, as well as earthworms, other harvestmen, spiders and other beneficial invertebrates. Although its generalist feeding habits and tendency for cannibalism
The page saysOn its own it appears unable to keep any pest under control.
The source saysP. opilio by itself appears unable to keep populations of any pest under control
The page saysIt is one member of a gang of generalist predators found in many crops, though, and together they help keep pest numbers low.
The source saysit serves as one member of a complex of generalist predators that exist in many crops and that together are able to help keep pest densities low
The page saysIn Europe the species has one generation a year and overwinters as eggs.
The source saysIn Europe P. opilio has a single generation per year and overwinters as eggs.
The page saysThe eggs hatch in three weeks to five months or more, depending on temperature, and the young take two to three months to mature, also depending on temperature.
The source saysThe eggs hatch in three weeks to five months or more, depending on temperature, and the immatures undergo several molts and reach maturity in two to three months, again depending on temperature.
The page saysOf the many harvestman species, P. opilio tends to be the most common in disturbed habitats such as crop fields in temperate regions.
The source saysOf the many species of harvestmen known, P. opilio tends to be the most common in relatively disturbed habitats such as most crops in temperate regions
The page saysNo. Unlike spiders, harvestmen have no web-spinning organs.
The source saysUnlike spiders, the two body sections of harvestmen are broadly joined and no web spinning organs are present.
The page saysYes. This species is highly susceptible to at least some broad-spectrum insecticides, while more specific products such as Bts appear to be less harmful.
The source saysP. opilio is highly susceptible to at least some broad spectrum insecticides, while some more specific products, such as Bts, appear to be less harmful.
The page saysThe top carries an indistinct, variable pattern of light gray or brown, and the underside is typically light cream.
The source saysThe upper surface of the body is colored with an indistinct and variable light gray or brown pattern, and the lower surface is typically light cream.
The page saysIn parts of North America, two or more generations may occur in a year.
The source saysIn parts of North America two or more generations may occur
The page saysIn moist places: under rocks, in cracks in the soil, or between the soil and a plant's crown or the leaves lying against the ground.
The source saysEggs are laid in moist areas under rocks, in cracks in the soil, or between the soil and the crowns or recumbent leaves of plants.
The page saysThis harvestman gets about on long, slender legs that hang from a short, globular body.
The source saysThe most notable features of P. opilio and many other harvestmen are the long, slender legs and short, globular body.Note: vibe.reason; reuses the body claim

Source
02

Integrated Taxonomic Information System

Phalangium opilio Linnaeus, 1758 (TSN 1014112). Integrated Taxonomic Information System.

The page saysEurope and northern Asia, and introduced to Canada
The source saysEurope & Northern Asia (excluding China) North America Jurisdiction/Origin: Canada, IntroducedNote: stats.habitat range
The page saysNot Evaluated
The source saysPhalangium opilio Linnaeus, 1758Note: stats.conservationStatus. No Red List assessment: GBIF's copy of the Red List has no category for Phalangium opilio and the prefetch found no assessment DOI; Crossref Red List searches under synonyms failed with HTTP 429 and were not repeated. ITIS is cited for the species name only. Precedent great-scallop, moon-jellyfish.
The page saysIt is found in Europe and northern Asia, and it has been introduced to Canada.
The source saysEurope & Northern Asia (excluding China) North America Jurisdiction/Origin: Canada, Introduced

Source
03

Gainett et al. 2022

Gainett et al. (2022). Eggs to long-legs: embryonic staging of the harvestman Phalangium opilio (Opiliones), an emerging model arachnid. Frontiers in Zoology.

The page saysIn a lab colony, a female lays a typical clutch of about 250 eggs roughly every three days
The source saysA typical egg clutch contains approximately 250 embryosNote: stats.superpower
The page saysroughly every three days
The source saysFemales of P. opilio lay one egg clutch approximately every three days, when provided with fresh food and a container with moist coconut fiber at 26 °C
The page saysIt belongs to Opiliones, the third-largest order of arachnids, with over 6,500 described species.
The source saysOpiliones is the third-largest order of Arachnida ... with over 6,500 described species
The page saysPhalangium opilio was the first harvestman described with the Linnean system, the scientific naming scheme.
The source saysthe first species of Opiliones described with the Linnean system
The page saysHarvestmen also carry repugnatorial glands, which deter predators.
The source saysunique repugnatorial glands for deterring predatorsNote: Order scope (Opiliones), worded as harvestmen in general.
The page saysTheir openings are called ozopores, and in a lab-reared P. opilio embryo red pigment starts to show around them at about day 14.
The source saysStage 17: Ozopore pigmentation (day 14) Stage 17 is defined by the onset of red pigmentation around the ozopores, which are the openings of the repugnatorial glands
The page saysIn a lab colony kept at 26 °C, females laid one egg clutch about every three days, and a typical clutch held approximately 250 embryos.
The source saysFemales of P. opilio lay one egg clutch approximately every three days, when provided with fresh food and a container with moist coconut fiber at 26 °CNote: Clutch size from the same paper: 'A typical egg clutch contains approximately 250 embryos'.
The page saysa typical clutch held approximately 250 embryos
The source saysA typical egg clutch contains approximately 250 embryos
The page saysThe eggs are almost spherical and about 0.55 mm across.
The source saysEggs measure approximately 550 µm in diameter, are light-yellow in color, and are almost spherical.Note: 550 µm = 0.55 mm. Reviewer: the Cornell page says about 0.4 mm; the 2022 paper's measured figure replaces it.
The page saysAdults in a research colony lived 40 to 60 days.
The source saysThe adult lifespan is 40–60 days.Note: Lab colony at UW-Madison (Fig. 1 caption: 'terraria where adults P. opilio are kept at the Sharma lab (UW-Madison)').
The page saysAdults can be collected in temperate parts of North America, Europe and East Asia, and in New Zealand.
The source saysAdult animals can be collected in temperate regions of North America, Europe, East Asia, as well as New Zealand.

How the table was made: a writer drafted the profile from these sources and logged each claim with its quote, a reviewer with nothing but this table checked every sentence said no more than its quote, and a script confirmed each quote appears word for word in the source. The method is in the site'sAbout page.