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How do dermal papillae create fingerprint patterns?

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A pangolin walks through grass with a blue circle around it and the word endangered written in white across the image. — Integument The pangolin is the only mammal in the world covered in scales.

Fingerprint patterns are formed by the structural relationship between the epidermis and the dermis. Specifically, the dermis contains an outer papillary layer characterized by numerous microscopic, peglike protuberances known as dermal papillae.31

These papillae are arranged in definite, consistent patterns beneath the surface of the skin. Each ridge of the epidermis is anchored to the dermis by a double row of these papillae. This arrangement creates the alternating ridges and grooves on the palms and soles known as dermatoglyphics. Because these papillae provide the structural foundation for the epidermal ridges, the ridge pattern is preserved even if the surface skin is damaged; however, if the dermal papillae themselves are destroyed, the ridge pattern is permanently obliterated.123