[4] Although the 2023 study confirmed the age identification of the 2004 study through palynological, palaeobotanical and zircon analyses incorporating newly discovered additional data,[3] this is based on adjacent structurally separated block with different stratigraphy and sedimentology to the block with fossil site it was discovered, and it is confirmed as unsustainable.

[9] The single, 1 cm-long fragment of P. newmani depicts small paranota (keels) high on the body, long, slender legs.

[1] The fossil is important because its cuticle contains openings which are interpreted as spiracles, part of a gas exchange system that would only work in air.

[6][10] Trace fossils of myriapods are known dating back to the late Ordovician[1] (the geologic period preceding the Silurian), but P. newmani may be the earliest body fossil of a myriapod, if it had been dated at 428 million years ago (Silurian, late Wenlock epoch to early Ludlow epoch).

[11][8] In spite of the recent competing arguments, the 2023 study suggests that this taxon is still most likely the earliest body fossil of a myriapod, with its age reconfirmed as the late Wenlock epoch (around 430 million years ago) through various analyses.