rigati
Rigati is the Italian term for pasta shapes that have ridges or grooves on their surface, in contrast to lisci, the smooth varieties. The adjective rigato (plural rigati) describes this textured category and is commonly used in labeling and descriptions of pasta. Rigati shapes are produced by extrusion or molding that creates external ribs, which increase surface area and help hold sauces.
Common rigati shapes include rigatoni, penne rigate, radiatori, and tortiglioni, as well as other ridged forms
Culinary use: The ridges allow sauces—especially chunky tomato sauces, meat ragù, and creamy preparations—to cling to
Production and labeling: On packaging, "pasta rigata" signals ribbed pasta. Most dried rigati is made from durum