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Ganl. Bull. Singapore 70 (Suppl. 1) 2018 
Damayantia aff. simrothi Collinge, 1903, Fig. 2P 
Damayantia aff. simrothi is recorded for the first time in Singapore. However, 
available references and comparative material in Singapore are few and inadequate 
to provide determination of the species, thus the identification of the slug mentioned 
is provisional. Its body is yellow in colour and the mantle is smooth. Its foot is keeled 
with a series of ridges (rugae). It is likely to be arboreal as all the specimens were 
observed foraging on trees or underneath the leaves. 
Family BRADYBAENIDAE 
Bradybaena similaris (Ferussac, 1821) 
Bradybaena similaris is commonly found throughout the moist tropics in urban areas 
such as gardens and plant nurseries. It is an agricultural pest and is most likely to have 
been introduced due to the horticultural and agricultural trade (Tan et al., 2012). It was 
observed in high numbers near the outskirts of Nee Soon but none was recorded within 
the freshwater swamp forest. 
Family CAMAENIDAE 
Amphidromus atricallosus temasek, Tan, Chan & Panha, 2011, Fig. 2Q 
Amphidromus atricallosus temasek is a recently described subspecies endemic to 
Singapore (Tan et al., 2011) and is restricted to forest within the Central Catchment 
Nature Reserve, Western Catchment (Chua & Tan, 2015), Pulau Ubin (Tan & Xu, 
2013) and Pulau Tekong (Tan et al., 2015). Populations include individuals with both 
dextral and sinistral chirality. The ratio of dextral and sinistral specimens found is 
approximately 1:1 and interestingly both are well distributed within the swamp. This 
species is arboreal and spends much of the time up in the trees. It can sometime be 
observed on man-made concrete structures. A suspected egg cluster was observed 
during the survey (Fig. 2R). 
Distribution of land snails 
A total of ten families, 18 genera and 19 species of land snails were recorded from the 
15 plots in Nee Soon. The data are shown in Table 2. Four species of snails: Dyakia 
kintana, Liardetia convexoconica, Hemiplecta humphreysiana and Amphidromus 
atricallosus temasek were identified as having a wide distribution within Nee Soon, 
being recorded in at least ten of the 15 plots. Four species of snails, Coneuplecta 
microconus, Helicarion perfragilis, Parmarion martensi and Bradybaena similaris 
were confined to the outskirts of Nee Soon. 
