Subgenus Andiorrhinus (Turedrilus) Righi, 1993

Type species. Andiorrhinus samuelensis Righi, 1986 .

Diagnosis. Only two pairs of intestinal hearts in segments 10 and 11 (Righi 1986, 1993). Setae in 8 longitudinal lines, one gizzard in segment 6, one pair of intraclitellar male pores, spermathecae present or absent, three pairs of calciferous glands in segments 7–9 with lamellar structure. Sexual system holandric and metagynous with seminal vesicles short or long. Number of species: 12. Distribution: Venezuela (5), Brazil (5) and Colombia (2). Although Andiorrhinus meansi (James, 2009) from Guyana (1) has two pairs of intestinal hearts in segments 10 –11, it was recommended not to include this species in Turedrilus until a general revision (James 2009).