Characters;"S. cataracta sp. n.";"S. subspinipes piceoflava (Syntypes)";"S. hainanum*";"Laos (Holotype)";"Thailand (Paratype)";"Vietnam (Paratypes)";"Laos (Paratype)" "Number of antennal articles";19;19;19;18(19);17–18;17–19 "Number of glabrous articles";6;6;6;6;6;6 "Teeth on tooth-plate";6+6;6+6;"5+5, 6+6";6+6;"5+5, 6+6";6+6,7+7 "First tergite with complete paramedian sutures";"incomplete (short PS on anterior and posterior part)";"incomplete (short PS on posterior parts from TT5–20)";"incomplete (short PS on anterior and posterior parts from TT3–20)";"incomplete (short PS on anterior and posterior part)";"complete, starting from T3";"incomplete, starting from T3–4" "First tergite with margination";7;14;"7 and 10";12;5–7;5 "Tergite surface";smooth;smooth;smooth;smooth;punctate;smooth "Extent (percentage) of paramedian sutures on sternites";15–20%;20–45%;10–25%;15%;complete;"nearly complete" "Sternite of ultimate leg-bearing segment";"sides converging posteriorly";"sides converging posteriorly";"sides converging posteriorly, with pit like-furrow";"sides converging posteriorly";"sides converging posteriorly, with pit like-furrow";"sides converging posteriorly, with pit like-furrow" "Spines on coxopleural process";"AP: 3(2) DP: 0–1";"AP: 1–2";"AP: 1 SAP: 2";"AP: 3 DP: 1";"AP: 1";"AP: 1–2" "Spine formula on prefemora of ultimate legs";"VL: 2 M: 1 DM: 0–1 SP: 2";"VL: 1 M: 0–1 DM: 1–2 SP: 1";"VL: 2 M: 1–2 DM: 1–2 SP: 2–3";"VL: 1 M: 0 DM: 0 SP: 2";"V: 0–2 SP: 2–5";"VL: 1 VM: 1 DM: 2 SP: 2" "Legs with one tarsal spur";1–20;1–20;"1–19, 20(R)";1–19;1–20;1–19 "Gonopods on genital segment";"female specimen";?;"female specimens";?;present;absent