Dr. Murai Éva szerk.: Parasitologia Hungarica 20. (Budapest, 1987)
and acetabular cavity. Rather more similar to suckling disc than to acetabulum. D.e. c. and v. e. c. as well as d. i. c. and v. i. c. similar in number and arrangement. Exterior circular units usually longer than those inwards. M. e. c. present. Radial fibres poorly developed; anterior longitudinal fibres weakly developed but distinct. (Valid for Cladorchis asper. ) 2. Basidiodiscus type (Fig. 30) Small in size with some scumsy papillae in its inner surface. Breadth of the wall of the acetabulum small, acetabular cavity well developed. Units of d.e.c. and v. e.c. series few. D. i. c. and v. i. c. series with a great number of units, similar in size and number. M. e. c. present. Radial fibres poorly developed, exterior longitudinal fibres moderately developed and distinct. (Valid for Basidiodiscus echtorchis.) 3. Brevicaecum type (Fig. 31) Moderate in size. Acetabular wall and cavity moderately developed. Différences between dorsal and ventral parts of acetabulum considerable. D.e.c. series consisting only of a single row of units similar in size. D.i. c. series well-developed with muscle units decreasing inwards. Units of v. e. c. and v, i.e. series longer than those inwards. Exterior longitudinal fibres strongly developed along the whole marginal side. Radial fibres moderately developed. (Valid for Brevicaecum niloticum.) 4. Chiostichorchis type (Fig. 32) Well-developed in size. Acetabular wall and acetabular cavity moderately developed. Characterized by the presence of fewer units in dorsal half of acetabulum than in ventral one. Units of d.e.c: few, equal in size. V. e. c. series consisting of a great number of units, diminishing in size towards interior of the series. Number of units in d. e. c. smaller than those in v. i.e. Exterior longitudinal fibres more or less well-developed in dorsal and marginal parts of acetabulum. Radial fibres moderately developed, forming some loosely packed bands. (Valid for Chiostichorchis walteri .) 5. Cleptodiscus type (Fig. 33) Small in size, with symmetrically arranged and poorly developed circular muscle series. Acetabular wall thin, acetabular cavity well-developed. Units of d. e. c. and v. e. c. series more or less similar in number and size. Units of d. i. c. and v. i. c. series numerous, diminishing inwards. M. e.c. moderately developed. Radial muscle fibres well-developed. (Valid for Cleptodiscus reticulatus and Stunkardia burti. ) 6. Dadayius type (Fig. 34) Moderate in size, with weakly developed musculature and thin acetabular wall. Marginal part of acetabulum concave, basal line convex and undulating. This wavy line is the consequence of linear protuberances situated parallelly on inner surface of acetabulum. Units of series d. e. c. and v. e. c. as well as d. i. c. and v. i. c. few and inconsiderably developed. Radial fibres weakly developed. (Valid for Dadayius marenzelleri.) 7. Gigantheus type (Fig. 35) Enormous in size, with symmetrically arranged musculature. Units of series d.e.c. and v. e. c. and their development more or less similar. D. i. c. and v. i.e. similar in number and size. Exterior longitudinal fibres in dorsal and ventral parts equally developed. M.e.c. moderately developed. Radial fibres evenly spaced and moderately developed. (Valid for Stichorchis gigantheus.) 8. Microrchis type (Fig. 36) Well-developed in size, with thin acetabular wall and well-developed acetabular cavity. D. e. c. consisting of a single group of units, larger than the v. e. c. series. Units of d. e. c. and v. e. c. almost equal in size. Units of series d. i. c. and v. i. c. similar in number and size. Ventro-lateral oblique fibres forming a small bundle at marginal side. M.e.c. welldeveloped. (Valid for Microrchis spp. )
