World Spider Catalog (2022). World Spider Catalog. Version 23.5. Natural History Museum Bern, online at http://wsc.nmbe.ch, accessed on {date of access}. doi: 10.24436/2 (Link)
The DNA barcode marker CO1 of Atypus snetsingeri found in Pennsylvania USA showed it to be an exact match with Atypus karschi from Japan. The species status is "introduced" in the USA.
Unintended disagreements occur when a parent (B) is
thinned by swapping a child (E) to another part of the
taxonomic tree, resulting in existing IDs of the parent being interpreted
as disagreements with existing IDs of the swapped child.
Identification
ID 2 of taxon E will be an unintended disagreement with ID 1 of taxon B after the taxon swap
If thinning a parent results in more than 10 unintended disagreements, you
should split the parent after swapping the child to replace existing IDs
of the parent (B) with IDs that don't disagree.
The DNA barcode marker CO1 of Atypus snetsingeri found in Pennsylvania USA showed it to be an exact match with Atypus karschi from Japan. The species status is "introduced" in the USA.