Wikipedia
Scrotifera is a proposed clade of mammals within Laurasiatheria, consisting of the following six orders and their common ancestors:
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Artiodactyla
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Cetacea
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Carnivora
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Pholidota
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Perissodactyla
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Chiroptera
It is based on evidence from molecular phylogenetics.
The name comes from the word scrotum, a pouch in which the testes permanently reside in the adult male. All members of the group have a postpenile scrotum, often prominently displayed, except for some aquatic forms and pangolin (which has the testes just below the skin). It appears to be an ancestral character for this group, yet other orders generally lack this as an ancestral feature, with the probable exception of Primates.