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In his comprehensive study of the Paraonidae, in general, and of
Aricidea jeffreysii (Mcintosh), in particular, Cerruti (1909) synonymized
Levensenia Mésnil, 1897, with
Paraonis Grube, 1873, and recognized the latter and
Aricidea Webster, 1879, as the two valid genera of the family. In addition, he reduced
Cirrophorus Ehlers, 1908, to subgeneric status in the genus
Aricidea and proposed a new subgenus,
Paraonides, for the genus
Paraonis.
This classification of the Paraonidae was followed for more than fifty years, and was recognized by Fauvel (1927), E. and C. Berkeley (1956), Hartman (1959), Day (1961), and Pettibone (1963). Hartman (1957), in addition to proposing a third subgenus,
Aedicira, for the genus
Aricidea, redefined
Paraonis (Paraonides) Cerruti.
It remained for Day (1963) to raise the subgenera to generic rank with the statement (p. 420) that "...as the whole family includes some fifty species it is suggested that the subgenera be given full generic rank." Hartman (1965a), with some few exceptions, concurred with Day as to the generic status of the former subgenera and proposed two new genera,
Aparaonis and
Paradoneis, the latter including
Paraonides as earlier redefined (Hartman, 1957); all seven genera were listed in Hartman's catalogue supplement (Hartman, 1965b). Laubier (1965, p. 469), in his report of the presence of
Cirrophorus in the Mediterranean, followed Day in the recognition of genera, with the comment that "Ce point de vue parait justifié...," and Glémarec (1966), in describing a new species of
Paradoneis from Brittany also accepted Day's judgment. Finally, Day (1967) continued the recognition of the former subgenera as genera, with the exception of
Paradoneis Hartman which he returned to
Paraonides Cerruti. Thus, according to some authors there are presently seven, six, or two genera in the family Paraonidae, and generic criteria are the presence or absence of modified setae in neuropodia or notopodia and/or the presence or absence of a median prostomial antenna.