Taxonomic study of the genus Myrmarachne of Borneo (Araneae: Salticidae) Author Yamasaki, Takeshi Author Ahmad, Abdul Hamid text Zootaxa 2013 3710 6 501 556 journal article 10.11646/zootaxa.3710.6.1 2f68fba9-85fd-49a0-9c2e-13374b8b72aa 1175-5326 248777 C5F537B3-8112-4CC7-A0AC-B5CA071AD9BA Key to species of Myrmarachne of Borneo Male 1 Pedicel almost as long as, or longer than ALE–PLE ( Figs 6 A, 13A, 32A)........................................ 2 - Pedicel distinctly shorter than ALE–PLE ( Figs 2 A, 4A)...................................................... 4 2 Fang bearing tooth-like apophysis ( Fig. 32 D)...................................... melanocephala MacLeay, 1839 - Fang without tooth-like apophysis....................................................................... 3 3 Chelicera apically swollen............................................................. assimilis Banks, 1930 - Chelicera without swollen apex........................................................ cornuta Badcock, 1918 4 Basal half of fang strongly arched ( Figs 8 C, 16C, 18B)....................................................... 5 - Fang otherwise...................................................................................... 7 5 With carapace in dorsal view, chelicera very short, less than half the length of carapace........ gedongensis Badcock, 1918 - With carapace in dorsal view, chelicera longer, more than half the length of carapace............................... 6 6 In lateral view upper margin of chelicera convex ( Fig. 8 B)............................... biseratensis Badcock, 1918 - In lateral view upper margin of chelicera not convex ( Fig. 16 B)................................... cyrtodens sp . nov . 7 Chelicera apically swollen............................................................................. 8 - Chelicera apically not swollen.......................................................................... 12 8 Apical prolateral tooth of chelicera bifid ( Figs 4 C, 22D)...................................................... 9 - Apical prolateral tooth of chelicera simple............................................................... 10 9 Chelicera without retrolateral teeth...................................................... alticephalon sp . nov . - Chelicera with retrolateral teeth.......................................................... lambirensis sp . nov . 10 Body length distinctly less than 5 mm ; flange of RTA complex ( Figs 20 E–G)....................... hanoii Żabka, 1985 - Body length usually more than 5 mm ; RTA weakly sinuous.................................................. 11 11 Prolateral teeth confined to anterior half of chelicera........................................ opaca (Karsch, 1880) - Prolateral teeth present along whole length of prolateral margin................................ acromegalis sp . nov . 12 Chelicera bearing one or two spurs on its inner margin ( Figs 10 A, 30A)........................................ 13 - Chelicera without spur on its inner margin............................................................... 14 13 One spur at apex of inner margin of chelicera ( Figs 10 A, 10E).................. borneensis Peckham & Peckham, 1907 - Two spurs in anterior part of inner margin of chelicera, more distal spur very large ( Figs 30 A, 30D).................................................................................................. maxillosa (C. L. Koch, 1846) 14 Chelicera distinctly longer than carapace ( Figs 17 A–B, 28A–B, 35A–B)....................................... 15 - Chelicera not longer than carapace..................................................................... 17 15 Abdomen narrow elongate-oval ( Fig. 28 A)..................................... markaha Barrion & Litsinger, 1995 - Abdomen oval..................................................................................... 16 16 Retrolateral cheliceral teeth confined to posterior part of chelicera................................... endoi sp . nov . - Retrolateral cheliceral teeth confined to anterior part of chelicera.......................... nitidissima (Thorell, 1877) 17 Chelicera distinctly shorter than carapace; body small, less than 5 mm .......................................... 18 - Chelicera not distinctly shorter than carapace; body not small, more than 5 mm .................................. 19 18 Abdomen with two transverse black bands dorsally........................... mariaelenae Edwards & Benjamin, 2009 - Abdomen without such bands.......................................................... brevichelicera sp . nov . 19 Abdomen with posterior black, broadly transverse band......................... shelfordii Peckham & Peckham, 1907 - Abdomen without such a band......................................................................... 20 20 Embolus of palp broadened apically, with a short process at apex ( Fig. 15 E)...................... crassembolus sp . nov . - Embolus of palp slender, tapering apicad, with pointed apex ( Fig. 24 E)........................................ 21 21 Anterolateral area of cephalic part above coxa I fringed with white hairs; dorsum of thoracic part strongly swollen............................................................................. malayana Edmunds & Prószyński, 2003 - Anterolateral area of cephalic part without fringe of white hairs; dorsum of thoracic part without distinct swelling................................................................................................ sabahna sp . nov . FIGURE 1. Collection sites in Borneo. Female 1 Abdomen with posterior broad, black, transverse band.......................... shelfordii Peckham & Peckham, 1907 - Abdomen without such a band.......................................................................... 2 2 Pedicel almost as long as, or longer than ALE–PLE ( Figs 7 A, 14A, 33A)........................................ 3 - Pedicel distinctly shorter than ALE–PLE ( Fig. 3 A)......................................................... 5 3 Thoracic part distinctly lower than cephalic part, with weakly convex dorsum ( Fig. 7 B).......... assimilis Badcock, 1918 - Thoracic part slightly lower than cephalic part, with distinctly convex dorsum ( Figs 14 C, 33B)...................... 4 4 Copulatory atria oval; lateral pockets present in front of epigastric furrow ( Figs 33 D–H, 34A–C).................................................................................................. melanocephala MacLeay, 1839 - Copulatory atria elongate-oval; small median pocket present in front of epigastric furrow ( Figs 14 D–F).................................................................................................... cornuta Badcock, 1918 5 Anterior part of sclerotised copulatory ducts twisted ( Figs 9 D, 12D)............................................ 6 - Anterior part of sclerotised copulatory ducts not twisted ( Fig. 25 D)............................................ 13 6 Body very small, distinctly less than 5 mm in total length.................................................... 7 - Body larger, more than 5 mm in total length................................................................ 9 7 Anterior part of sclerotised copulatory ducts twisted more than once; lateral pockets present in front of epigastric furrow ( Fig. 21 D)................................................................................ hanoii Żabka, 1985 - Anterior part of sclerotised copulatory ducts twisted once; median pocket present in front of epigastric furrow ( Figs 12 D–F) 8 8 Abdomen with two transeverse black bands dorsally.......................... mariaelenae Edwards & Benjamin, 2009 - Abdomen without such bands.......................................................... brevichelicera sp . nov . 9 Posterior margin of coxa II and anterior margin of coxa III densely fringed with black hairs ( Fig. 23 C)....................................................................................................... lambirensis sp . nov . - Posterior margin of coxa II and anterior margin of coxa III not fringed with black hairs............................ 10 10 Median pocket of epigyne with anteromedian indentation ( Figs 9 D–F)..................... biseratensis Badcock, 1918 - Median pocket anteriorly rounded ( Figs 3 D–F)............................................................ 11 11 In lateral view dorsum of cephalic part strongly convex ( Fig. 3 B)............................... acromegalis sp . nov . - In lateral view dorsum of cephalic part almost flat or weakly convex ( Figs 29 B, 38B)............................. 12 12 White lateral marking formed of white hairs present in anterolateral cephalic part above coxae I and III.......................................................................................... markaha Barrion & Litsinger, 1995 - White lateral marking absent in anterolateral part of cephalic part.................................. sabahna sp . nov . 13 Cephalic part remarkably higher (about 2X ) than thoracic part ( Fig. 5 B); spermathecae remarkably large ( Figs 5 D–E)......................................................................................... alticephalon sp . nov . - Cephalic part slightly higher than thoracic part; spermathecae linear, or roundly swollen but not remarkably large....... 14 14 Spermathecae linear and straight ( Figs 19 D–E)........................................ gedongensis Badcock, 1918 - Spermathecae oval or spherical........................................................................ 15 15 Median pocket slender, longer than broad ( Figs 31 D–E)................................ maxillosa (C. L. Koch, 1846) - Median pocket broad, broader than long, or indistinct ( Figs 25 D–E)............. malayana Edmunds & Prószyński, 2003