Tropidophora ligata ( Müller, 1774 )

Muratov, Igor V., 2010, Terrestrial molluscs of Cabo Delgado and adjacent inland areas of north-eastern Mozambique, African Invertebrates 51 (2), pp. 255-255 : 263

Tropidophora ligata ( Müller, 1774)

Figs 6 , 56

Nerita ligata: Müller 1774: 181 (12.7–23.3× 12.7–21.2 mm).

A common species, recorded from seven stations on Cabo Delgado and inland, with a general distribution from South Africa to Tanzania as well as on Madagascar and Mauritius. Differs from the other three species of Tropidophora in the region by the very weak spiral sculpture on the periphery of the last whorl, with most of the shells having noticeable spiral sculpture only in the umbilical area.

Figures

Figs 3–14. Cyclophoridae: (3) Cyathopoma diegoense, 1.8×2.5 mm, stn 7. Maizaniidae: (4) Maizania wahlbergi, 11.5×15.2 mm, stn 3. Pomatiidae: (5) Tropidophora nyasana, 16.7×17.7 mm, stn 7; (6) T. ligata, 17.5×18.3 mm, stn 17; (7) T. insularis, 17.2×17.0 mm, stn 4; (8) T. zanguebarica, 11.0×10.8 mm, stn 9. Truncatellidae: (9) Truncatella marginata, 6.0×2.5 mm, stn 7. Pupillidae: (10) Pupoides coenopictus, 4.3×2.2 mm, stn 7. Gastrocoptidae: (11) Gastrocopta klunzingeri, 1.8×1.0 mm, stn 7. Vertiginidae (stn 7): (12) Nesopupa peilei, 1.7×1.0 mm; (13) Nesopupa corrugata, 2.0×1.0 mm; (14) Nesopupa bisulcata, 1.3×0.8 mm.Scale bar 1 mm in Figs 3, 10–14; 10 mm in Figs 4–8; 2 mm in Fig. 9.

Figs 56–61. Pomatiidae: (56) Tropidophora ligata, shell 15.5×15.3 mm, stn 7; (57) T. zanguebarica, shell 10.0×9.5 mm, stn 7; Cerastidae: (58) Rhachistia catenata, shell 10.0×6.3 mm, subadult, stn 1; Achatinidae:(59) Achatina immaculata,shell 102×56 mm,stn 1; Subulinidae:(60)Kempioconcha boivini, shell 16.0×8.4 mm, stn 1; (61) K. conradti, shell 13.7×6.2 mm, stn 8.