Microcystina Penang sp. 6

Goh, Soo-Mun, Jasrul, Dulipat, Lee, Mei-Yi, Vermeulen, Jaap J. & Liew, Thor-Seng, 2025, From 153 - year-old records to contemporary discoveries: land snail (Mollusca, Gastropoda) diversity in Penang Hill, Malaysia, ZooKeys 1230, pp. 99-154 : 99-154

Microcystina Penang sp. 6

Fig. 9 D

Material examined.

Malaysia • Penang Hill, Teluk Bahang- Balik Pulau, Lam durian farm, Plot. 13 ; 5.4198 ° N, 100.2259 ° E; 290 m a. s. l.; 21 Oct. 2022; T. S. Liew, J. Dulipat, M. Y. Lee leg.; BOR/MOL 15559 • Penang Hill, Botanical garden, Plot. 29 ; 5.4400 ° N, 100.2866 ° E; 75 m a. s. l.; 2 Feb. 2023; T. S. Liew, M. Y. Lee, A. Yusni leg.; BOR/MOL 15756 .

Remarks.

This is a new record for Penang Hill. The shell spire is slightly raised, and the shell whorls are more rapidly expanded compared to other Microcystina species from Penang Hill. On the upper shell, there are densely spirally arranged pits on the apical whorls, transitioning to densely placed spiral grooves on the subsequent whorls, which become more densely placed towards the periphery. Below the shell, there are densely placed spiral grooves that continue from the upper shell and fade away towards the umbilicus.

Figures

Figure 9. A Microcystina Penang sp. 2 BOR / MOL 15458 B Microcystina Penang sp. 4 BOR / MOL 15755 C Microcystina Penang sp. 5 BOR / MOL 15762 D Microcystina Penang sp. 6 BOR / MOL 15756. Scale bar: 0.5 mm.