Two new species of Paramanota (Diptera: Mycetophilidae: Manotinae), Paramanota rodzayi, new species, and P. trilobata, new species, are described from Brunei and Thailand, respectively. The new species, P. rodzayi, represents the first record of this genus from the island of Borneo. The barcode mitochondrial cytochrome oxidase subunit I (COI) sequence, partial 12S ribosomal RNA and partial nuclear 28S ribosomal RNA sequences of P. rodzayi are also provided, indicating its possible relationship to P. orientalis Tuomikoski, 1966.

Quidnipagus palatum and Tellinides timorensis have not been previously recorded from Singapore in the literature (e.g., Morris & Purchon, 1981; S. K. Tan & Woo, 2010), and are herein reported for the first time. Nevertheless both species are probably not very rare and the lack of reports may be due to a general lack of sampling efforts and reports on the local malacofauna.

Two new species of the genus Acutigebia (Decapoda: Gebiidae: Upogebiidae) collected from Xisha (Spratly) Islands are described. Acutigebia serrifera, new species, most closely resembles Acutigebia simsoni (Thomson, 1893), but differs markedly in the propodus of pereopod 1 with lower teeth. Acutigebia laticauda, new species, most closely resembles Acutigebia trypeta (Sakai, 1970), but differs markedly in the proportionally wider telson. This is the fi rst record of the genus Acutigebia from the South China Sea. An updated key to the species of Acutigebia is provided.