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Different types of fingerprint patterns exist in humans from "summary" of Forensic Fingerprints by Max M. Houck
Human fingerprints can be broadly classified into three main categories: arches, loops, and whorls. These categories are further subdivided into specific patterns that can be unique to each individual. Arches are characterized by ridges that enter from one side of the finger and exit on the other side, forming a smooth wave-like pattern. Loops, on the other hand, have ridges that enter from one side and exit on the same side, creating a looped pattern. Whorls are more complex patterns that consist of circular or spiral ridges. Within each category of fingerprints, there are variations that distinguish one pattern from another. For example, arches can be divided into plain arches and tented arches based on the presence of a slight sp...
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