During recent wildlife surveys on Pulau Tekong, Singapore, opportunities were taken to document the terrestrial malacofauna diversity, which is hitherto unknown. Eleven species were consequently recorded, namely Semperula cf. maculata, Semperula cf. variegatula, Achatina fulica, Subulina octona, Paropeas achatinaceum, Hemiplecta humphreysiana, Sarika resplendens, Parmarion martensi, Quantula striata, Bradybaena similaris and Amphidromus atricallosus temasek, from the families Veronicellidae, Achatinidae, Subulinidae, Ariophantidae, Dyakiidae, Bradybaenidae and Camaenidae. The records, and photographic evidence, of the terrestrial molluscs occurring on the island are provided in this short note. Notably, Paropeas achatinaceum is rediscovered in Singapore after more than a century, and the discovery of sympatrically occurring yellow- and white-shelled forms of Amphidromus atricallosus temasek is reported for the first time.

Opinions and declarations Rendered by the International Commission on Zoological Nomenclature

Opinions and declarations Rendered by the International Commission on Zoological Nomenclature

The conservation statuses in Singapore of the four native species of Tetrastigma (Vitaceae) are reviewed here in light of recently collected plant specimens and sightings. All four species are still extant, but undercollected probably owing to the rarity of sighting reproducing specimens. Tetrastigma dichotomum had previously been thought to be extinct in Singapore, but was rediscovered recently as a remnant population in the Bukit Timah Nature Reserve. A voucher specimen was made from a cultivated plant in the Native Plant Nursery of the National University of Singapore and deposited in the Herbarium, Raffles Museum of Biodiversity Research, National University of Singapore (SINU). This shows that more work should be done by field workers when sampling for these species, with special effort made to collect more reproductive specimens. To this end, cultivating the plants can ensure that the plants can be collected when reproducing. This is also a practical way for ex situ conservation, though more genetically diverse individuals would have to be represented as the genus is dioecious.

Opinions and declarations Rendered by the International Commission on Zoological Nomenclature