†Thais (Polytropa) Swainson 1840 (murex snail)
Gastropoda - Neogastropoda - Muricidae
Alternative spelling: Polytropa
Parent taxon: Thais according to E. J. Moore 1963
Sister taxa: Thais (Mancinella), Thais (Thais), Thais (Vasula), Thais arenae, Thais biserialis, Thais bitubercularis, Thais blakei, Thais brevicula, Thais clarkensis, Thais cornwalli, Thais dubia, Thais emarginata, Thais lamellosa, Thais packi, Thais panzana, Thais trancosana, Thais tuberosa, Thais wittichi
Subtaxa: Thais (Polytropa) lima
Ecology: epifaunal carnivore
Distribution:
• Pliocene of United States (1: California collection)
• Miocene of United States (4: California, Oregon)
Total: 5 collections each including a single occurrence