ACANTHOCOLLARITREMA-UMBILICATUM TRAVASSOS, FREITAS-AND-BUHRNHEIM, 1965 (DIGENEA, ACANTHOCOLLARITREMATIDAE) FROM THE COMMON SNOOK, CENTROPOMUS-UNDECIMALIS, FROM ITAMARACA, STATE OF PERNAMBUCO, BRAZIL
Rb. Robaldo et Ip. Padovan, ACANTHOCOLLARITREMA-UMBILICATUM TRAVASSOS, FREITAS-AND-BUHRNHEIM, 1965 (DIGENEA, ACANTHOCOLLARITREMATIDAE) FROM THE COMMON SNOOK, CENTROPOMUS-UNDECIMALIS, FROM ITAMARACA, STATE OF PERNAMBUCO, BRAZIL, Memorias do Instituto Oswaldo Cruz, 93(3), 1998, pp. 303-307
Acanthocollaritrema umbilicatum Travassos, Freitas and Buhrnheim, 1965
, is the only species of Acanthocollaritrematidae described up to the
moment. The systematic position of this species and the validity of th
e family has been questioned by the possible presence of a gonotyl and
a genital atrium associated to the acetabulum. In this paper, specime
ns of this trematode, collected from Centropomus undecimalis cultivate
d at Itamaraca, State of Pernambuco, northeast Brazil were studied und
er optical and scanning electron microscopy, and compared with availab
le sintypes. Gonotyl and genital atrium were not observed and both fam
ily and species are considered valid taxonomic entities. A. umbilicatu
m is redescribed with the addition of new morphological information.