ðeɪ ɑːɹ smˈɔːl dʒˈɛnɚɹə, kəntˈeɪnɪŋ ˈoʊnli θˈɜːtiːn ænd sˈɛvən dᵻskɹˈaɪbd spˈiːsiːz, ɹᵻspˈɛktɪvli, ænd ðɛɹ kəmbˈaɪnd ɹˈeɪndʒ ɪz nˌɪɹli aɪdˈɛntɪkəl tə ðə ɹˈeɪndʒ ʌv kjˌuːkɚbˈiːɾə ɪnðə nˈuː wˈɜːld, fɹʌm sˈaʊθ ɐmˈɛɹɪkə tə nˈɔːɹθ ɐmˈɛɹɪkə.
They are small genera, containing only 13 and 7 described species, respectively, and their combined range is nearly identical to the range of Cucurbita in the New World, from South America to North America.