Extended Data Figure 4: Skin structures of S. xenarthrosus. | Nature

Extended Data Figure 4: Skin structures of S. xenarthrosus.

From: A Cretaceous eutriconodont and integument evolution in early mammals

Extended Data Figure 4

a, SEM image of skin surface showing compound hair follicles (FO), epidermal cells (keratinocytes), and pores (P). b, Schematic drawings of scale-like skin folds (SCF) with compound hair follicles (FO) of the dog with primary (PH) and secondary (SH) hairs of three ontogenetic stages (redrawn from ref. 38). c, Skin surface of Spinolestes with scale-like wrinkles. d, Schematic diagram of scale-like wrinkled skin folds with hair follicles of a dog (redrawn from ref. 38). e, SEM image of epidermal cells (keratinocytes) of a hair follicle. f, SEM images of skin surface with polygonal epidermal cells (keratinocytes) and pores. g, Detail of the keratinocytes.

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