How To Write A Species Scientific Name . The above instance shows that the classifications go from general (animalia) to specific ( c. The icsp recommends spelling out the entire name of. Linneau’s System of Scientific Names Binomial Nomenclature Rules from www.pinterest.com Both parts should be italicized, unless the. Together, these two pieces create the scientific name of a domestic cat. For instance, the scientific name of the domestic housecat is felis catus (note that because scientific names are in latin, they are always italicized when written, and the first word is always capitalized).