Somatic morphology of Mallinus nitidiventris female (1, 3) and male (2, 4) from Bankfontein, Free State (NCA 2015/1818) 1, 2 habitus, dorsal view 3, 4 same, lateral view. Scale bars: 1.0 mm.

Scanning electron microscope photographs of Mallinus nitidiventris male (5–10, 12–19) and female (11) 5 carapace, dorsal view 6 detail of carapace integument 7 same, detail of carapace setae 8 same, detail of carapace pore 9 fovea 10 eye region, dorsal view 11 endites, labium and anterior end of sternum 12 distal end of chelicera, arrow indicating posterior groove of fang 13 distal end of endite, black arrow indicating distal endite scale, white arrow indicating prolateral field of flattened denticles 14 prolateral margin of endite, showing detail of flattened denticles 15 femur I, dorsal view, incised setae and femoral organ (black arrow) 16–19 femoral organ on legs I–IV, respectively.

Scanning electron microscope photographs of Mallinus nitidiventris female (20, 21, 28, 29, 33, 34) and male (22–27, 30–32) 20 patella IV, retrolateral view 21 same, detail of lyriform organ 22 metatarsus I, incised setae and dorsal fields of short chemosensory setae (black arrows) 23 same, detail of short chemosensory setae 24 metatarsus I, trichobothrium 25 metatarsus III, arrow indicating metatarsal stopper 26 metatarsus III, arrows indicating thickened ventral terminal setae 27 same, metatarsus IV 28 tarsus I, paired claws in distal view 29 same, prolateral distal view, black arrow indicating chemosensory seta, white arrow indicating subdistal suture of tarsus 30 same, trichobothrium 31 same, chemosensory seta 32 same, tarsal organ 33 palpal tarsus and claw 34 palpal patella, lyriform organ.

Scanning electron microscope photographs of Mallinus nitidiventris male (35, 41, 42, 44–46) and female (36–40, 43) 35 abdomen, ventrolateral view 36 petiole, ventral view 37 ventral abdominal setae 38, 41 spinnerets, ventral view, arrow in 38 indicating sclerite in front of tracheal spiracle 39 detail of setae on sclerite in front of tracheal spiracle 40, 42 detail of anterior lateral spinnerets 43 epigyne, ventral view 44 palp, ventral view 45 detail of palpal claw and thickened distal prolateral seta 46 detail of palpal claw.

Mallinus nitidiventris, female (47) and male (48, 49) genitalic morphology (NCA 2008/2612) 47 epigyne, ventral view 48 palp, retrolateral view 49 same, ventral view. Abbreviations: C–conductor; E–embolus; MA–median apophysis. Scale bars: 0.1 mm.

Mallinus nitidiventris, female (50, 51) and male (52, 53) genitalic morphology (NCA 2008/2612) 50 epigyne, ventral view 51 same, digested, dorsal view 52 palp, ventral view 53 same, retrolateral view. Scale bars: 0.1 mm.

Somatic morphology of Mallinus nitidiventris female (54, 55) and male (56, 57) from Beaufort West, Western Cape (NCA 91/1300 and NCA 2008/2612, respectively) 54, 56 habitus, dorsal view 55, 57 same, ventral view. Scale bars: 1.0 mm.

Somatic morphology of “Mallinus” sp. male from north-western Namibia (SMN 40843) 58 habitus, dorsal view 59 same, ventral view 60 carapace, lateral view 61 same, anterior view 62 abdomen, lateral view 63 palp, ventral view 64 same, retrolateral view. Scale bars: 1.0 mm (58, 59); 0.5 mm (60–62); 0.25 mm (63, 64).

“Mallinus” sp., male genitalic morphology (SMN 40843) 65 palp, retrolateral view 66 same, ventral view. Abbreviations: E–embolus; MA–median apophysis. Scale bars: 0.25 mm.

Distribution of Mallinus nitidiventris (type locality, red circle; other localities, yellow circles) and “Mallinus” sp. (red square) in southern Africa. ? indicates immature specimen requiring confirmation.