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Class Aphanoneura
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Resumo(s)
The Aphanoneura are a class of Annelida, with an equivocal
relationship with clitellates (oligochaetes and leeches)
and no clear affiliation with any of the traditional polychaete
groups (Struck & Purschke, 2005; Zrzavy´ et al.,
2009). They comprise two families, Aeolosomatidae and
Potamodrilidae, which have been included among the
Polychaeta in previous reviews of freshwater annelids
(Glasby & Timm, 2008; Glasby et al., 2009). Aeolosomatidae,
currently considered Annelida incertae sedis
(WoRMS, 2012), is the most diverse and abundant aphanoneuran
represented in the Palaearctic by three genera:
Rheomorpha Ruttner-Kolisko, 1955 (one species), Hystricosoma
Michaelsen, 1926 (one species) and Aeolosoma
Ehrenberg, 1828 (at least 20 species). The Potamodrilidae
is represented in the Palaearctic by a single species, Potamodrilus
fluviatilis (Lasto ckin, 1935.)