4.12: MINUTIAE — Read — Invisible Network

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As previously mentioned in Chapter 3, Sir Francis Galton provided for us a method of classification inside of the patterns that are based on natural formations of the ridges. These formations, called minutiae or Galton’s Detail, are bifurcations, end ridges, short ridges, enclosures, spurs, bridges, and dots. The position of these formations within the pattern are what make the finger marks unique and individual. The following are descriptions of fingerprint minutiae:

Ridge endings = a ridge that ends abruptly
Ridge bifurcation = a single ridge that divides into two ridges
Short ridges, island or independent ridge = a ridge that commences, travels a short distance and then ends
Ridge enclosures = a single ridge that bifurcates and reunites shortly afterward to continue as a single ridge
Spur = a bifurcation with a short ridge branching off a longer ridge
Bridge = a short ridge that runs between two parallel ridges

Black and white fingerprint patterns highlighting a short ridge and a spur, each marked with blue circles and red arrows.

Diagram of a fingerprint with a blue circle and an arrow pointing to a ridge labeled "Bridge."

Black and white fingerprint pattern with a blue circle highlighting a dot, and a red arrow pointing to the dot. — Figure \(\PageIndex{1}\): Galton's Detail - Author's collection

Image of a fingerprint close-up, highlighting an "End Ridge" and "Bifurcation" with labels and circles around them. — Figure \(\PageIndex{1}\): Galton's Detail - Author's collection

This page titled 4.12: MINUTIAE was last modified on Sun, 25 Jan 2026 01:27:47 GMT and is shared under a CC BY-SA 4.0 license and was authored, remixed, and/or curated by David Doglietto.

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