Revision of Leucothoe (Amphipoda, Crustacea) from the Southern Ocean: a cosmopolitanism concept is vanishing Author Krapp-Schickel, Traudl E1B1DCCF-04CB-4B1A-A69B-A7C25EC95A38 Zoologisches Forschungsmuseum A. Koenig, Adenauerallee 160, D- 53113 Bonn, Germany E-mail: traudl. krapp @ uni-bonn. de (corresponding author) & urn: lsid: zoobank. org: author: E 1 B 1 DCCF- 04 CB- 4 B 1 A-A 69 B-A 7 C 25 EC 95 A 38 Author Broyer, Claude De 970067BF-A792-48A9-B32A-B91F0E41C354 Royal Belgian Institute of Natural Sciences, rue Vautier 29, B- 1000 Bruxelles, Belgium E-mail: claude. debroyer @ naturalsciences. be & urn: lsid: zoobank. org: author: 970067 BF-A 792 - 48 A 9 - B 32 A-B 91 F 0 E 41 C 354 text European Journal of Taxonomy 2014 2014-04-15 80 1 55 journal article 21805 10.5852/ejt.2014.80 6758c39f-119f-401b-bf6e-c458ea4f4dca 2118-9773 3860901 FDB2386B-9DC8-47C3-B7AB-406BE4264478 Key for Antarctic and sub-Antarctic Leucothoe -species: 1. Cx 2 and Cx 4 anterodistally with acute angle [eyes yellowish]......................................................... .......................................................................... L. merletta sp. nov. ( 2.5 mm , depth range unknown) – Coxae anterodistally never acutely pointed....................................................................................... 2 2. P 5-7 basis ratio l:w clearly> 2, proximally widest ............................................................................ ............................................................................. L. longimembris sp. nov. ( 15 mm , depth: 1030 m ) – Basis P 5-7 ratio l:w <2, medially widest ......................................................................................... 3 3. Gn 1 propodus and carpus distally very narrow and elongate, propodus ratio l:w> 5, dactylus ≤ 1/3 of propodus length; Gn 2 propodus with palmar corner; peraeopod dactyli> 1/2 length of propodus; Ep 2 posterodistally acutely lengthened [eyes small, compact and dark red]..................................... L. orkneyi Holman & Watling, 1983 ( 4-9 mm , depth-range 11-1584 m ) – Gn 1 propodus ratio l:w ≤ 5, dactylus ≥ 1/3 of propodus-length, Gn 2 propodus without palmar corner; peraeopod dactyli ≤ 1/2 length of propodus.......................................................................... 4 4. Gn 1 propodus robust, ratio l:w = 3.0-3.5. [Cx 3 narrow with nearly parallel margins; P 5-7 basis ovoid, hind margin in P 7 scarcely serrate, Ep 3 posterodistal corner minutely lengthened, posterior margin excavate]........................................ L. macquariae sp. nov. ( 6-10 mm , depth-range 5-111 m ) – Gn 1 propodus ratio l:w more than 3.5 .............................................................................................. 5 5. Gn 2 dactylus very long, reaching up to about 2/3 of propodus length; Gn 1 propodus ratio l:w = 5; Ep 3 posterodistal corner rectangular ............. L. campbelli sp. nov. ( 5-7 mm , depth-range 10-25 m ) – Gn 2 dactylus about half length of propodus or little more............................................................... 6 6. P 7 basis regularly rounded, ratio length to width about 1.3. Eyes large, ommatidia separated ......... .......... L antarctica Pfeffer, 1888 ( 4-9 mm , depth-range 24-335 m , doubtful material from 1584 m ) – P 7 basis ratio length to width about 1.7. Eyes large, ommatidia fused .............................................. ................................................................ L. weddellensis sp. nov. ( 10-24 mm , depth range 9-602 m )