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

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

Results and Discussion The amphistomes species obtained from the present collection belong to the families: Gastrothylacidae Stiles & Goldberger, 1910 and Paramphistomidae Fischoeder, 1901. Species of these two families are easily differentiated by the presence (Gastrothylacidae) or absence (Paramphistomidae) of the ventral pouch. Gastrothylacidae Stiles & Goldberger, 1910 Key to the genera of Gastrothylacidae 1. Uterus and vas deferens cross over near middle Gastrothylax Uterus and vas deferens in dorsal median line along their length 2 2. Testes horizontal, one on each side of median line Carmyerius Testes not horizontal, median Fischoederius Gastrothylax crumenifer (Creplin, 1847) (Figs 1,7, 12) Diagnosis: Body length 10.7-16.3, body width 5.3-8.7. Acetabulum 1.2 by 2.3 in size, Gastrothylax type (Fig. 1), number of muscle units: d.e.c. 98-147, d.i.c. 100-113, v.e.c. 103-114, v.i.c. 108-121, m.e.c. 10-14. Ventral pouch usually triangular in cross section with dorsally directed apex. Pharynx Paramphistomum type (Fig. 8), oesophagus 1.1-1.3. Testes 1.2.-1.3 by 0.5-0.6. Pars prostatica moderately developed. Ovary 0.2.-0.3 in diameter. Terminal genitalium opens into ventral pouch, Gracile type (Fig. 12.). Eggs 0.12-0.14 by 0.05-0.07. Hosts: Bos primigenius f. taurus, Bubalus arnee f. bubalis. Habitat: rumen. Carmyerius spatiosus (Brandes, 1898) (Figs 1, 8, 12) Diagnosis: Body length 8.7-11.2, body width 2.3-3.0. Acetabulum 1.2-1.3 by 1.0-1.2, Gastrothylax type (Fig. 1), number of muscle units: d.e.c. 66-69, d.i.c. 40-44, v.e.c. 45-48, m.e.c. 6-7. Ventral pouch either circular or triangular with blunt angles. Pharynx 0.5-0.7 by 0.4-0.6, Paramphistomum type (Fig. 8), oesophagus 0.2-0.3. Pars musculosa weakly developed. Ovary 0.2-0.3 in diameter. Terminal genitalium within ventral pouch, Gracile type (Fig. 12). Eggs 0.1-0.2 by 0.06-0.07. Host: Bos primigenius f. taurus. Habitat: rumen. Fischoederius elongatus (Poirier, 1883) (Figs 2, 8, 13) Diagnosis: Body length 3.2-20.1, body width 1.6-3.2. Acetabulum 1.2-1.3 in diameter, Fischoederius type (Fig. 2), number of muscle units; d.e.c. 42-46 + 9-11, d.i.c. 36-41, v.e.c. 50-53, v.i.c. 56-61, m.e.c. 16-19. Ventral pouch usually triangular with ventrally directed apex. Pharynx 0.5-0.7 by 0.02-0.5, Paramphistomum type (Fig. 8), oesophagus 0.5-0.8. Testes 0.7-1.1 in diameter. Pars musculosa moderately developed. Ovary 0.1-0.3 by 0.2-0.4. Terminal genitalium within ventral pouch, Elongatus type (Fig. 13). Eggs 0.11-0.13 by 0.05-0.07. Hosts: Bos primigenius f. taurus, Bubalus arnee f. bubalis. Habitat: rumen.