Sastrugi dunes, and the resulting drifting snow shapes are also popularly referred to as "barchans". Inuit of Canada call them "kalutoqaniq". When winds slacken, the drifted formations consolidate via sublimation and recrystallization. Subsequent winds erode kalutoqaniq into the sculptured forms of sastrugi. Inuit call large sculpturings "kaioqlaq" and small ripples "tumarinyiq". Further erosion may turn "kaioqlaq" back into drifting "kalutoqaniq". An intermediate stage of erosion is "mapsuk", an overhanging shape. On the windward side of a ridge, the base erodes faster than the top, producing a shape like an anvil tip pointing upwind. Sastrugi are more likely to form on first-year
Surface wave detection by animals to these by swimming 15 cm. The neuro-anatomical basis for this ability has not yet been identified. "A lineatus" and similar surface feeding fish (e.g. "Pantadon bucholzi") use a slightly modified lateral line organ called a neuromast to detect surface waves. "A lineatus" has 18 neuromasts (specialized vibration-sensitive lateral line organs) on the dorsal surface of the head of "A lineatus". These are organized into three groups by longitudinal position, and each group is bilaterally symmetric. The groups are, caudal to rostral: nasal/infraorbital (I), supraorbital (II), and supratemporal/post-orbital (III). Each neuromast is a cluster of hair-cell bundles arranged in a