A New Species of Brevitalitrus (Crustacea: Amphipoda: Talitridae) from Malaysia Author Tomikawa, Ko Department of Science Education, Graduate School of Education, Hiroshima University, Higashihiroshima, Hiroshima 739 - 8524, Japan E-mail: tomikawa @ hiroshima-u. ac. jp & Corresponding author tomikawa@hiroshima-u.ac.jp Author Nakano, Takafumi Department of Science Education, Graduate School of Education, Hiroshima University, Higashihiroshima, Hiroshima 739 - 8524, Japan E-mail: tomikawa @ hiroshima-u. ac. jp & Present address: Department of Zoology, Graduate School of Science, Kyoto University, Sakyo-ku, Kyoto 606 - 8502, Japan tomikawa@hiroshima-u.ac.jp Author Ross Othman, B. H. School of Marine and Environmental Sciences and Institute of Oceanography and Environment, Universiti Malaysia Terengganu, 21030 Kuala Terengganu, Terengganu, Malaysia Author Morino, Hiroshi Department of Zoology, National Museum of Nature and Science, Tsukuba, Ibaraki 305 - 0005, Japan text Species Diversity 2018 2018-05-25 23 1 51 59 http://dx.doi.org/10.12782/specdiv.23.51 journal article 7117 10.12782/specdiv.23.51 34b9cb0c-b413-42bb-976f-5fd984d5603b 2189-7301 4585095 EF75A2CD-6316-4E08-9C3F-EFB8E4E268E0 Key to Species of Brevitalitrus 1 Outer rami of uropods 1 and 2 with marginal robust setae......................................... 2 — Outer rami of uropods 1 and 2 without marginal robust setae.................................... 6 2 Posterodistal corners of epimeral plates 1–3 with prominent rounded tooth; telson with dorso-lateral marginal robust setae............... B. stephenseni — Posterodistal corners of epimeral plates 1–3 sub-acute and slightly produced; telson without dorso-lateral marginal robust setae.......................... 3 3 Inner distal corner of pleopod 2 with seta......... 4 — Inner distal corner of pleopod 2 without seta...... 5 4 Inner ramus of uropod 1 with 3 marginal robust setae........................................ B. wolffi — Inner ramus of uropod 1 with 5 marginal robust setae................................... B. hortulanus 5 Outer margin of inner ramus of uropod 2 with 1 robust seta; inner rami of pleopods 1 and 2 relatively long and 0.7–0.9 times as long as peduncles; robust seta on peduncle of uropod 3 reaching distal part of ramus....................................... B. pangkorensis — Outer margin of inner ramus of uropod 2 with 2 robust setae; inner rami of pleopods 1 and 2 short and 0.5 times as long as peduncles; robust seta on peduncle of uropod 3 not reaching distal part of ramus................................................ B. strinatii 6 Distal lobe of basis of pereopod 7 rounded below; rami of pleopods 1 and 2 7- to 9-articulate, longer than respective peduncles......................... B. toli — Distal lobe of basis of pereopod 7 emarginate; rami of pleopods 1 and 2 2- to 6-articulate, shorter than respective peduncles............................. 7 7 Antenna 2 long, flagellum 25- to 28-articulate; ramus of uropod 3 with 1 seta................ B. dyaulanus — Antenna 2 short, flagellum 12- to 16-articulate; ramus of uropod 3 with 2–3 setae...................... 8 8 Posterodistal lobe of basis of pereopod 7 distinctly incised at junction with ischium; posterior margin of epimeral plate 3 sinuous; distolateral robust seta of uropod 1 having a projecting terminal capillary and a terminal cap............................. B. nesius — Posterodistal lobe of basis of pereopod 7 barely incised at junction with ischium; posterior margin of epimeral plate 3 gently convex; distolateral robust seta of uropod 1 simple............................. B. kumanoi