Bonifay identifies Hayes “80B/99“--“à mon sens mal nommée“--as the latest variant (second half 7th century) of Hayes 99 (Bonifay2004, p. 181, under Sigillée type 55 variante D).
Bibliography
Bonifay2004, pp. 172, 173, fig. 92 (Sigillée type 43)
Shallow bowl or dish with narrow, flat base that curves out to straight flaring wall with plain, rounded or outwardly thickened rim. Two subtypes vary by rim shape (A, B). Uncommon ARS form of the late 5th century.