Eleven new species of jumping spiders (Araneae, Salticidae) from Sumatra

Eleven new species of jumping spiders (Araneae: Salticidae) from Jambi Province, Sumatra, Indonesia, are described: Chalcovietnamicus tikus Dhiya’ulhaq sp. nov. (♂♀), Dendroicius garigi Dhiya’ulhaq sp. nov. (♂), Epeus kepayang Dhiya’ulhaq sp. nov. (♂♀), Indomarengo likaliku Dhiya’ulhaq sp. nov. (♂♀), Pengmarengo gepeng Dhiya’ulhaq sp. nov. (♂♀), Phintella candramawa Dhiya’ulhaq sp. nov. (♂♀), Phintella castor Dhiya’ulhaq sp. nov. (♂♀), Phintella siginjai Dhiya’ulhaq sp. nov. (♂), Poecilorchestes keciknyo Dhiya’ulhaq sp. nov. (♂♀), Psenuc lalawa Dhiya’ulhaq sp. nov. (♂♀) and Stertinius senja Dhiya’ulhaq sp. nov. (♂♀). Additionally, new species records of Epeus albus (Prószyński, 1992) (♂♀) and Simaetha cheni (Wang & Li, 2021) (♂♀) for Sumatra are provided, as well as high-resolution images of Epeus sumatranus (Prószyński & Deeleman-Reinhold, 2012) (♂♀). Spider specimens were collected by canopy fogging in four land-use systems: (1) lowland rainforest, (2) smallholder plantations of ‘jungle rubber’ (low impact rubber agroforestry, Hevea brasiliensis), (3) smallholder monoculture rubber and (4) smallholder monoculture oil palm (Elaeis guineensis). Of the eleven new salticid spider species, seven were exclusively found in the rather natural systems of lowland rainforest and jungle rubber, while two were found in jungle rubber and rubber, and the remaining two were found in rubber or oil palm monocultures. No species encountered in oil palm was also encountered in forest or vice versa. This applies also to the extant species, which were either found in monocultures of oil palm and rubber, or in lowland rainforest or jungle rubber. This observation offers the first glimpse into the ecology of the eleven newly described salticids and adds to existing knowledge on the other three.