By David S Brown
The 1st 1/2 this booklet is basically a scientific survey of the snails, starting with glossaries, keys for id to genera and a list of species. this is often by way of a synopsis of species, with short notes on ecology, distribution and parasites. Relationships are then defined among snails and schistosomes and with different parasites. The publication is going directly to think of the standards affecting snail populations and attainable equipment for inhabitants regulate.
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Additional info for Freshwater Snails Of Africa And Their Medical Importance
B) Cassidula labrella. (c) Melampus semiaratus. (d) Burnupia sp. (e) Ferrissia sp. (f) Ancylus fluviatilis. Scale line: 2 mm (d–f) or 4 mm (a–c). 2 A Shell smaller, <5 mm long, apical ridges very fine (Figs 10e; 79f) .... Ferrissia (p. 169) B Larger, reaching 6–10 mm long, apical ridges coarser (Figs 10f; 79c,d). Ancylus (p. 161) Family PLANORBIDAE: subfamily Planorbinae (excluding the few palaearctic genera reported rarely from NW Africa). This key includes Indoplanorbis of the Bulininae, which has a large discoid shell similar to Biomphalaria and Helisoma.
PS, penis sheath. Re, rectum. VD, vas deferens. Scale lines: 1 mm. biologically distinct species. Brackets enclose the names of species believed to have been introduced in recent historical time. CLASS GASTROPODA 34 SYSTEMATIC SYNOPSIS: INTRODUCTION, GLOSSARY, IDENTIFICATION KEYS, CHECKLIST Fig. 14. Planorbidae: diagrams of copulatory organs, (a) Ceratophallus. (b) Gyraulus. (c) Afrogyrus. (d) Bulinus. 5 mm. BW, position of attachment to body wall. Pe, penis. Pr, preputium. PS, penis sheath. RM, retractor muscle.
G. -B. G. -B. G. -B. G. -B. G. barthi Brown G. -B. J. -B. -B. Sierraia leonensis Connolly S. expansilabrum Brown S. outambensis Brown S. whitei Brown Soapitia dageti Binder Family Assimineidae Assiminea bifasciata Nevill A. Boettger A. keniana Brown Eussoia inopina Preston E. aethiopica (Thiele) E. leptodonta (Connolly) Family Thiaridae E. -B. )P. ) T. scabra (Müller) Melanoides admirabilis (Smith) M. crawshayi (Smith) M. magnifica (Bgt) M. mweruensis (Smith) M. nodicincta (Dohrn) M. nyassana (Smith) M.