NEOTROPICAL MONOGENOIDEA - 33 - 3 NEW SPECIES OF ANCISTROHAPTOR N. G.(DACTYLOGYRIDAE, ANCYROCEPHALINAE) ON TRIPORTHEUS SPP. (TELEOSTEI, CHARACIDAE) FROM BRAZIL, WITH CHECKLISTS OF ANCYROCEPHALINES RECORDED FROM NEOTROPICAL CHARACIFORM FISHES

Three new species of Ancistrohaptor n. g. are described from the gills of three species of Triportheus (Characidae) collected from the envir ons of Manaus, Amazonas, Brazil: A. falcatum n. sp. from T. elongatus; and A. falciferum n. sp. and A. falcunculum n. sp. from T. angulatus, T. albus and T. elongatus. Ancistrohaptor n, g. is proposed for speci es possessing overlapping gonads, a dextral or dextroventral vaginal a perture, a coiled (counter-clockwise) male copulatory organ, two acces sory pieces in the copulatory complex, and a haptor armed with two pai rs of anchors (ventral anchor with elongate shaft), dorsal and ventral bars and 14 hooks; hook pair 1 (ventral) anterior to ventral bar, pai rs 2-4 (ventral) lying bilaterally anterior to ventral anchor bases, p air 5 (ventral) associated with distal end of ventral anchor shafts, a nd pairs 6 and 7 (dorsal) bilateral about midway along haptoral length . Parasite-host and host-parasite lists of the Ancyrocephalinae from n eotropical Characiformes are provided.