Two species of Ceradocus collected from coastal areas in Japan, with description of a new species (Crustacea: Amphipoda: Maeridae) Author Ariyama, Hiroyuki text Zootaxa 2019 2019-08-22 4658 2 297 316 journal article 25935 10.11646/zootaxa.4658.2.5 9f0cd0ac-792a-4566-8880-b61e0125a5ad 1175-5326 3375866 C90D9081-2857-44A8-9850-86C79A5D14CC Ceradocus Costa , 1853 [Japanese name: Nokogiriyokoebi-zoku] Ceradocus Costa , 1853: 170 .— Stebbing, 1906: 430 .— Sheard, 1939: 277 .—J.L. Barnard, 1969: 239 .—J.L. Barnard & C.M. Barnard, 1983: 614 .— Krapp-Schickel, 2008a: 12 .— Krapp-Schickel, 2008b: 1430 .— Krapp-Schickel & Vader, 2009: 2061 .— Lowry & Myers, 2013: 36 .— Hughes, 2016: 7 .— Alves, Johnsson & Senna, 2019: 128 . Ceradocus ( Ceradocus ) .— Sheard, 1939: 277 . Ceradocus ( Denticeradocus ) Sheard, 1939: 277 . Type species. Ceradocus orchestiipes Costa , 1853 , monotypy . Emended diagnosis. Body , pleonites with dorsal teeth or smooth, pleonal epimeron 3 usually serrate, urosomites usually with dorsal teeth or processes. Head , rostrum small to absent, lateral cephalic lobe rounded or extended, antennal sinus often forming notch; eyes oval. Antennae elongate; antenna 1, peduncular articles 1–2 longer than article 3, primary flagellum as long as peduncle, accessory flagellum long or short; antenna 2 shorter than antenna 1, gland cone very large. Mandible , palp article 1 with acute distal tooth, article 2 longest, article 3 very short, not falcate. Lower lip with inner lobes. Maxilla 1 , inner plate triangular, with medial setae; palp 2-articulate. Maxilla 2 , inner plate with medial setae and dense oblique row of facial setae. Coxae ordinary length to short, poorly setose; coxa 1 produced anteroventrally, posteroventral margin without teeth or processes; coxae 5–6 lobate; gills present on coxae 2–6, oostegites of female present on coxae 2–5. Gnathopod 1 small, subchelate; carpus elongate, unlobed; propodus ovate to rectangular, palm oblique to transverse, short. Gnathopod 2 subchelate; male gnathopod 2 enlarged, symmetrical or asymmetrical, carpus short, lobate, propodus large, ovate to subrectangular or trapezoidal, palm oblique to transverse, short to long, smooth or sculptured, dactylus outer margin with 0–1 seta; female gnathopod 2 generally smaller, symmetrical, carpus slightly elongate, palm oblique and poorly defined, unsculptured. Pereopods , dactyli simple; bases of pereopods 5 – 7 scarcely expanded, lobate, often sharply, posterior margins weakly serrate. Uropods biramous; uropod 1 peduncle with basofacial robust seta, rami of uropods 1–2 extending evenly, with marginal robust setae; uropod 3 extending well beyond tips of uropods 1–2, peduncle slightly elongate, rami long, subequal in length, lanceolate to weakly paddle-shaped, with marginal robust setae. Telson deeply cleft, both lobes pointed distally, lateral margins straight to slightly convex, usually with 1–2 or more long subdistal robust setae. Included taxa (43 species and 2 subspecies). Ceradocus adangensis Wongkamhaeng & Boonyanusith, 2016 ; C. alama Myers & Nithyanandan, 2016 ; C. andamanensis Wongkamhaeng, Coleman & Pholpunthin, 2013 ; C. baudini Hughes, 2016 ; C. breweri ( Kunkel, 1910 ) ;? C. capensis Sheard, 1939 ; C. chevreuxi Sheard, 1939 ; C. chiltoni Sheard, 1939 ; C. circe Lowry & Springthorpe, 2005 ; C. cotonensis Appadoo & Myers, 2006 ; C. crenatipalma Ledoyer, 1979 ; C. dooliba J.L. Barnard, 1972a ; C. greeni Appadoo & Myers, 2005 ; C. hawaiiensis J.L. Barnard, 1955 ; C. inermis Hirayama, 1986 ; C. isimangaliso Milne & Griffiths, 2013 ; C. kiiensis sp. nov. ; C. koreanus Kim & Kim, 1989 ; C. laevis Oleröd, 1970 ; C. mahafalensis Ledoyer, 1979 ; C. mahafalensis incisa Ledoyer, 1978 ; C. mizani Lim, Azman & Othman, 2010 ; C. multidentatus Dang & Le, 2011 ; C. nanhaiensis Ren, 2012 ; C. natalensis Griffiths, 1974 ; C. nghisonensis Dang & Le, 2011 ; C. oliveri Appadoo & Myers, 2006 ; C. orchestiipes Costa , 1853 ; C. oxyodus Berents, 1983 ; C. paucidentatus J.L. Barnard, 1952 ; C. ramsayi ( Haswell, 1879 ) ; C. rubromaculatus ( Stimpson, 1856 ) ; C. rubromaculatus haumuri J.L. Barnard, 1972b ; C. sellickensis Sheard, 1939 ; C. serratus ( Bate, 1862 ) ; C. setosus Dang & Le, 2011 ; C. sheardi Shoemaker, 1948 ; C. shoalsi Appadoo & Myers, 2006 ; C. shoemakeri Fox, 1973 ; C. spinicauda ( Holmes, 1908 ) ; C. spinifer Ledoyer, 1973 ; C. tattersalli Ledoyer, 1983 ; C. vaderi Alves, Johnsson & Senna, 2019 ; C . wooree Berents, 1983 ; C. yandala Berents, 1983 .