L. Forró szerk.: Miscellanea Zoologica Hungarica 9. 1994 (Budapest, 1994)

Sey, O.; Prasitirat, P.: Amphistomes (Trematoda, Amphistomida) of cattle and buffalo in Thailand

Paramphistomidae Fischoeder, 1901 Key to the genera of Paramphistomidae 1. Excretory duct and Laurer's canal cross each other Excretory duct and Laurer's canal without crossing 2 Orthocoelium 3 2. Pars musculosa weakly developed Pars musculosa strongly developed Calicophoron 3. Acetabulum Explanatum type Acetabulum Paramphistomum or Pisum type Explanatum Paramphistomum Orthocoelium streptocoelium (Fischoeder, 1901) (Figs 3, 9, 14) Diagnosis: Body length 4.2-9.3, body width 1.0-2.3. Acetabulum 0.8-1.4 in diameter, Streptocoelium type (Fig. 3), muscle units: d.e.c. 16-21, d.i.c. 20-26, v.e.c. 15-20, v.i.c. 20-23, m.e.c. 4-7. Pharynx 0.3-0.9, Calicophoron type (Fig. 9), oesophagus 0.4-1.2, with muscular sphincter. Anterior testis 0.4-0.7 long and 0.6-0.9 in dorsoventral direction, posterior testis 0.2-0.6 long and 0.4-0.8 in dorsoventral direction. Pars musculosa well developed. Ovary 0.2-0.5 in diameter. Terminal genitalium Streptocoelium type (Fig. 14), genital pore postbifurcal. Eggs 0.11-0.14 by 0.05-0.07. Hosts: Bos primigenius f. taurus, Bubalus arnee f. bubalis. Habitat: rumen. Orthocoelium dicranocoelium (Fischoeder, 1901) (Figs 3, 10A, 10B, 12) Diagnosis Body length 4.1-7.1, body width 1.1-2.2. Acetabulum 0.5-1.1 in diameter, Streptocoelium type (Fig. 3), number of muscle units: d.e.c. 11-16, d.i.c. 18-26, v.e.c. 11-17, v.i.c. 18-26, m.e.c. 5-7. Pharynx 0.3-0.8 long, Dicranocoelium type (Figs 10A, 10B), oesophagus 0.3-1.1 long with muscular thickening. Anterior testis 0.6-1.2 long and 0.5-1.1 in dorsoventral direction, posterior testis 0.7-1.2 long and 0.5-1.2 in dorsoventral direction. Ovary 0.2-0.4 in diameter. Terminal genitalium Gracile type (Fig. 12), genital pore postbifurcal, pars musculosa well developed. Eggs 0.11-0.13 by 0.06-0.09. Hosts: Bos primigenius f. taurus. Habitat: rumen. Orthocoelium parvipapillatum (Stiles & Goldberger, 1910) (Figs 3, 10A, 10B, 15) Diagnosis. Body length 2.4-3.6, body width 1.0-2.1. Acetabulum 0.4-0.8, Streptocoelium type (Fig. 3), number of muscle units: d.e.c. 13-17, d.i.c. 20-24, v.e.c. 10-17, v.i.c.20-24, m.e.c. 3-7. Pharynx 0.3-0.5 long, Dicranocoelium type (Figs 10A, 10B), oesophagus 0.4-0.7 long. Anterior testis 0.3-0.5 long and 0.4-0.6 in dorsoventral direction. Pars musculosa moderately developed. Ovary 0.1-0.2 by 0.2-0.3. Terminal genitalium Parvipapillatum type (Fig. 15), genital pore postbifurcal. Eggs 0.12-0.14 by 0.061-0.07. Host: Bos primigenius f. taurus. Habitat: rumen. Key to the species of Orthocoelium 1. Pharynx Dicranocoelium type 2 Pharynx Calicophoron type O. streptocoelium 2. Terminal genitalium Gracile type O. dicranocoelium Terminal genitalium Parvipapillatum type O. parvipapillatum