Amphistomes (Trematoda) From Domestic Ruminants in North Borneo (Malaysia)

Abstract

Gastrothylax elongatus, G. synethes, G. cobboldii, Ceylonocotyle streptocoelium, C. scoliocoelium, and Ceylonocotyle gigantopharynx are reported from domestic ruminants of Borneo. C. gigantopharynx is a new name for Paramphistomum gotoi of Dawes, 1936 (not Fukui), redescribed here on the basis of median sagittal sections to permit its placement in the taxonomic system of Näsmark.

The taxonomy of the family Paramphistomidae Fischoeder, 1901 with special reference to the morphology of species occurring in ruminants. II. Revision of the genus Paramphistomum Fischoeder, 1901

“…The type specimens could not be traced but it is clear from the author's own description and illustration that the species in question belongs to the genus Orthocoelium and its specific status is discussed under that genus. Schad et al (1964) renamed P. gotoi of Dawes (1936) and of Tandon (1955b) as Ceylonocotyle gigantopharynx because they found, by examining several specimens from Bubalus bubalis in Borneo, Malaysia, that the species is not identical with P. gotoi Fukui, 1922. Yamaguti (1958)accepted its validity but listed the species under the genus Paramphistomum without giving any reason.…”

“…Yamaguti (1958)accepted its validity but listed the species under the genus Paramphistomum without giving any reason. The writer has re-examined the original material of Dawes (1936) identified as P. gotoi deposited in the British Museum (Natural History) and found that it is not identical with P. gotoi Fukui, 1922 but agrees with Ceylonocotyle gigantopharynx Schad et al, 1964. Material of this species from Bos taurus and Bubalus bubalis in the Philippines was also examined. It is characterized by Laurer's canal not crossing the excretory vesicle or duct and the well developed pars musculosa, features common to all species of the genus Orthocoelium.…”

“…It is characterized by Laurer's canal not crossing the excretory vesicle or duct and the well developed pars musculosa, features common to all species of the genus Orthocoelium. Schad et al (1964) were correct in assigning the species to Ceylonocotyle but as this is now a synonym of Orthocoelium, the species becomes Orthocoelium gigantopharynx (Schad, Kuntz, Anteson & Webster, 1964) n. comb. and is described and discussed in detail under this genus in a paper to be published shortly.…”

The taxonomy of the family Paramphistomidae Fischoeder, 1901 with special reference to the morphology of species occurring in ruminants. VI. Revision of the genus Orthocoelium (Stiles & Goldberger, 1910) Price & McIntosh, 1953

“…Earlier, Yamaguti (1958) erected the genera Pseudoparamphistoma and Paramphistomoides to contain P. cuonum and P. maplestonei respectively and later (1971) he maintained the same generic arrangement of the two species but listed P. spinicephalus Tandon, 1955 under the genus Paramphistomum with a note 'generic status sub judice'. Several species have been subsequently described under Ceylonocotyle namely, Ceylonocotyle dawesi Gupta, 1958 from domestic ruminants in India, C. petrovi Davydova, 1961 from Cervus nippon in Russia, Ceylonocotyle naesmarki Mukherjee, 1963 from sheep in India, C. gigantopharynx Schad, Kuntz, Anteson & Webster, 1964 (a new name proposed for Paramphistomum gotoi of Dawes, 1936 and of Tandon, 1955b but not of Fukui, 1922) and C. scoliocoelium var. benoiti Gr6tillat, 1966 from Syncerus caffer in Central Africa.…”

“…Yamaguti (1971) realized the validity of Orthocoelium over Ceylonocotyle and listed all species previously assigned to the latter under the former genus. However, without giving any reason, he listed Ceylonocotyle gigantopharynx Schad, Kuntz, Anteson & Webster, 1964 under the genus Paramphistomum. Two species were later described under Ceylonocotyle, C. narayanai Gupta & Gupta, 1972 and C. tamilensis Gupta & Bakhshi in Gupta & Nakhasi, 1977but Eduardo (1980b has now moved both species to Orthocoelium as new combinations.…”