<prompt> I-subfamily yesikhova esidala kunazo zonke, i-Hesperopetes, ivela emuva ku-Chadronian i-Eocene yokugcina, cishe iminyaka eyizigidi ezingama-40-35 edlule futhi ifana nezikhova ezindizayo zanamuhla. Izinhlobonhlobo zezikhova ze-fossil, kusukela ku-Eocene yakamuva kuya ku-Miocene, azizange zinikezwe ngokuqiniseka kunoma yimuphi umugqa ophilayo. Okungenani ezinye zalezi cishe zaziyizinhlobonhlobo ze-basal i-protosquadrels ngomqondo wokuthi zazingenayo uhla oluphelele lwezikhova ze-squirrels. Ukusabalalisa nokusabalalisa kokhokho basendulo kanye nokuphila manje kusikisela ukuthi izikhova zasendulo njengeqembu elilodwa kungenzeka ukuthi zavela eNyakatho Melika.  <response>: ezinhlanu 