Goweroconcha wilsoni Iredale, 1944

Fig.5 Genitalia in-situ and pallial cavities for six species, arranged by group and ranked from highest to lowest number of whorls. a, c, e, g, i, k: genitalia in situ; b, d, f, h, j, l: pallial cavities. a, b. Goweroconcha wilsoni, Mt Gower summit. a. AM C.574729; b. AM C.574878. c, d. Goweroconcha verans, Mt Gower summit, AM C.583016. e, f. Pseudocharopa ledgbirdi, Goat House, Mt Lidgbird, AM C.389618. g, h. Pseudocharopa balli, Mt Gower summit, AM

Fig. 10 Shell images of Goweroconcha. a. G. wilsoni, AM C.532579. b. G. caitlinae, AM C.593715. c. G. plesa, AM C.64382. d, e. G. water- housiae. d. AM C.397613. e. AM C.389181. f. G. wenda, AM C.407659. g. G. verans, AM C.532546. Images by Frank Köhler. Scale bar 5 mm

Fig. 11 Scanning electron micrographs showing shell microsculpture of larger Gow- eroconcha species. First column shows a dorsal view of the shell; second column shows the protoconch; third column shows the microsculpture of the late teleoconch. a–c. G. wilsoni, AM C.389729. d–f. G. caitlinae, AM C.583414. g–i. G. water- housiae, AM C.397613. j–l. G. waterhousiae, AM C.420251. Images by Sue Lindsay. Scale bars 1 mm (a, d, g, j), 200 µm (b, e, h, k), 100 µm (c, i), 50 µm (f, l)

Fig.12 Live images of Goweroconcha wilsoni and G. caitlinae. a. G. wilsoni, Erskine Valley, AM C.532622. b–e. G. caitlinae, Mt Gower summit. b. Subadult, AM C.593714. c, d. AM C.574719. e. AM C.574721. f. G. wilsoni, Mt Gower summit, AM C.574735. Images by Adnan Moussalli (a), Craig Stehn (b–f). Images not to scale

Fig. 13 Genitalia of Goweroconcha wilsoni, Mt Gower summit. a. Reproductive system, AM C.532600. b, c. Penis interior. b. AM C.532600. c. AM C.574703. d. Penis, undissected. AM C.574703. Scale bars 1 mm. Abbreviations: alb, albumen gland; at, atrium; bc,

Fig. 14 Radulae. a–c. Goweroconcha wilsoni, AM C.574703. d–f. G. caitlinae, AM C.590053. g–i. Pseudocharopa whiteleggei, AM C.532572. a, d, g: central teeth and initial lateral teeth; b, e, h: transi-

Fig. 15 Distribution map show- ing the range of Goweroconcha wilsoni, G. caitlinae and G. waterhousiae