Three new species and a new record of the spider genus Mallinella Strand, 1906 from Brunei (Araneae, Zodariidae).

This article is the first formal record of the genus Mallinella Strand, 1906 in Brunei Darussalam. Four Mallinella species are documented. Mallinella merimbunenis sp. nov., M. myrmecophaga sp. nov., and M. platyrhyncha sp. nov. are newly described. The females of M. bigemina Dankittipakul, Jocqué & Singtripop, 2012 are here recorded from Brunei for the first time. The latter species was previously known only from an evergreen hill forest at 2,000 m elevation at Mt. Kinabalu of Kinabalu Park in Sabah.

A new spider species of the genus Sudharmia from Sumatra, Indonesia (Araneae, Liocranidae).

A new spider species, Sudharmia tridenticula sp. nov., is described from primary evergreen forests of Sumatra, Indonesia.

Acutipetala, gen. nov., a new genus of funnel-web spiders from northern Thailand (Araneae, Agelenidae).

A new funnel-web spider genus, Acutipetala, gen. nov., is erected to accommodate two new agelenid species known to occur in evergreen forests of northern Thailand: Acutipetala octoginta, sp. nov. (type species,male symbolfemale symbol) and A. donglini, sp. nov. (male symbol). The genus is established on the basis of the distinctive appearance of the genital structures, in which the median apophysis of the male palp is petal-shaped, sharply pointed, and strongly sclerotized, and the truncate embolus is short, originates subapically, and is provided with a hook-shaped apical portion.