Caudatas is spelled with a "c" instead of a "k" because it comes from the Latin word "cauda" meaning tail. The "c" is pronounced as /k/ in IPA phonetics, and the word is accented on the second syllable, with an /a/ vowel sound that's pronounced as in the word "father" (/ˈkɔːdətəz/). Caudatas refers to a group of amphibians that have long tails, such as salamanders and newts, and is commonly used in biology and zoology.