Showing papers on "Digenea published in 1970"

Some helminth parasites of fishes of Bermuda and an account of the attachment organ of Alcicornis carangis MacCallum, 1917 (Digenea: Bucephalidae).

Abstract: Of 414 Bermuda fishes, 148 belonging to 13 species harboured Digenea and 11 belonging to 6 species Aspidogastrea, Acanthocephala or nematodes. In a previous paper 69 of these fishes belonging to 20 species were found to contain cestodes. The number of infected species was greatest in the case of cestodes and the number of infected individuals in the case of Digenea. The latter is probably due to the closer proximity, for reasonably long periods, of the various hosts in the life-cycles. Of the 17 species of Digenea 3 are new host records, 3 new locality records and 4 new host and new locality records. New records were found, also, in the other groups of helminths. The digenean fauna of Bermuda fishes most closely resembles that of Dry Tortugas, Florida. Digenea and cestodes were not usually found in the same families of fishes. Cestode larvae were abundant in the deep-water Serranidae and Lutianidae which had no Digenea, the latter being common in Clupeidae, Hae-mulidae and Belonidae, which do not harbour cestodes and which occur, mostly, in the inner reefs and shallows.The functional morphology of the apical disk, tentacles and rhynchus of Alcicornis carangis is described. The tentacles are invaginable and concerned with attachment.I am most grateful to Dr W. H. Sutcliffe Jun., Director of the Bermuda Biological Station, for the excellent facilities provided and to The Shell Grants Committee and The National Science Foundation for grants which made the work possible. I would also like to express my gratitude to all those who kindly helped in the capture of fishes and to Mrs M. Fisher for technical assistance.

A new species of Transversotrema (Trematoda: Digenea) from marine fishes of Australia.

Abstract: Transversotrema licinum sp. n. (Trematoda:Digenea: Transversotrematidae) is described from Scorpius sp. and Microcanthus strigatus in Queensland, Australia. It is ectoparasitic beneath the scales of the host. The genus Transversotrema Witenberg, 1944 (Family Transversotrematidae) is remarkable in its laterally extended body, lack of oral sucker, weakly muscular acetabulum, and other characters. The type species, T. haasi Witenberg, 1944, was found in a basin containing about 20 species of fishes from the Red Sea; its precise host and location in the host are still unknown. The peculiar Cercaria patialensis Soparkar, 1924, protandrous in a freshwater snail, Melanoides tuberculata (Miiller, 1774) in India, is a species of Transversotrema, T. patialense (Soparkar, 1924) Yamaguti, 1958. It has been reported from the same or related species of snail in the Congo (Brien, 1954) and in Ceylon. The structure and life cycle of T. patialense were further described by Crusz, Ratnayake, and Sathananthan (1964) who found "mature metacercariae" in abundance under the scales of Macropodus cupanus (Cuv. and Val.) (Osphronemidae), Ophiocephalus punctatus Bloch (Ophiocephalidae), and Tilapia mossambia (Peters) (Cichlidae), all freshwater fishes of Ceylon. These fishes were experimentally infected by cercariae from M. tuberculata. Olivier (1947) described Cercaria koliensis from Melanoides terebra (?) (Lesson) in the Solomon Islands. He noted its similarity to Transversotrema but did not place it in that genus. Yamaguti (1958) states it apparently belongs there, so the correct name is Transversotrema koliensis (Olivier, 1947) Yamaguti, 1958. There seems no doubt that Yamaguti used the word "apparently" in the sense of "obviously." Velasquez (1958) named Transversotrema Received for publication 30 December 1969. * Studies from the Department of Zoology, University of Nebraska, Lincoln, Nebraska, No. 415. Supported in part by NSF Grant GB 468. laruei from Lates calcarifer Bloch in the Philippines. At that time, the few specimens found were thought to come from the muscles and intestine. Later studies (Velasquez, 1961) showed that the bioculate, furcocercous, protandrous cercariae of this species emerged from rediae in brackish water snails, Thiara riquettii Grateloup, and became "progenetic metacercariae" under the scales of several species of freshwater and brackish water fishes. The species described below is the one mentioned in an abstract by Manter (1965). It occurred sexually mature beneath the scales of two species of marine fishes in Moreton Bay, Queensland, Australia. Eggs were usually present in the uterus and there seems no reason why the worms should not be considered normal adults, rather than progenetic

Metazoan parasites, excluding Monogenea, from longnose and white suckers.

Abstract: Seven genera of helminths (two of Digenea, one of Cestoda, and two each of Nematoda and Acanthocephala) and one species of parasitic copepod were recovered from 40 longnose suckers (Catostomus catostomus) and five white suckers (Catostomus commersoni), caught at two localities in Labrador, during August and September 1969. The helminths reported include five new host records.

Parasites of the ninespine stickleback Pungitius pungitius (L.) in Newfoundland and Labrador

Abstract: Metazoan parasites belonging to 11 genera (one of Monogenea; five of Digenea; two each of Cestoda and Acanthocephala; one of parasitic copepods) were recovered from 65 ninespine sticklebacks, Pungitius pungitius (L.), caught at four localities in Newfoundland and Labrador, during the period May–August, 1969.