Ceradocus

Hughes, Lauren E., 2016, New genera, species and records of Maeridae from Australian Waters: Austromaera, Ceradocus, Glossomaera, Hamimaera, Huonella gen. nov., Linguimaera and Maeraceterus gen. nov. (Crustacea: Amphipoda), Zootaxa 4115 (1), pp. 1-81 : 7

Key to Ceradocus species of Australian waters (modified after Sheard 1939)

1. Pleonites with dorsal serrations........................................................................... 2

– Pleonites without dorsal serrations..................................................... C. wooree Berents, 1983

2. Epimera 1–2 bearing only 1–2 (rarely 3) large or small teeth above the posterior distal corner......................... 3

– Epimera 1–2 bearing 5 or more large or small teeth or waves above definitive tooth................................ 11

3. Palm of gnathopod 2, dominant propodus with weakly defined palm corner..................... C. serratus ( Bate, 1862)

– Palm of gnathopod 2, dominant propodus, palm defined by well-developed subacute tooth............................ 4

4. Telson apical robust setae long (greater than telson length)..................................................... 5

– Telson apical robust setae short (less than or equal to telson length).............................................. 7

5. Urosomite 1 with dorsal carina(e). Male gnathopod 2 palm with mulitidentate distomedial shelf....................... 6

– Urosomite 1 dorsally smooth. Male gnathopod 2 palm with subquadrate tooth.................. C. yandala Berents, 1983

6. Epimera 3 posterior margin serrate........................................................................ 7

– Epimeron 3 posterior margin smooth........................................... C. oliveri Appadoo & Myers, 2006

7. Epimera 3 posterior margin strongly serrate......................................... C. crenatipalma Ledoyer, 1979

– Epimeron 3 posterior margin minutely serrate..................................... C. hawaiensis J.L. Barnard, 1955

8. Gnathpod 2 propodus similar in size.......................................................................9

– Gnathopod 2 propodus asymmetrical in size............................................................... 11

9. Gnathopod 2 propodus palm convex, smooth. Uropod 3 rami length 2.5–3 times breadth............................. 9

– Gnathopod 2 propodus palm with teeth. Uropod 3 rami length more than 4 times breadth..................................................................................................... C. circe Lowry & Springthorpe, 2005

10. Telson lobes each with 2 apical robust setae............................................. C. oxyodus Berents, 1983

– Telson lobes each with 3–4 apical robust setae................................. C. cotonensis Appadoo & Myers, 2006

11. Palm of gnathopod 2, dominant propodus nearly transverse............................... C. ramsayi (Haswell, 1880)

– Palm of gnathopod 2, dominant propodus subacute............................................. C. baudini sp. nov.

12. Pleonite 4 with broad dorsal midline gape, rarely bearing midline rudimentary tooth, gape bounded by pair (or more) of large teeth on each side............................................................. C. dooliba J.L. Barnard, 1972a

– Pleonite 4 with teeth at midline, no conspicuous medial gape.................................................. 13

13. Palm of gnathopod 2 nearly transverse, each lobe of telson with more than 2 apical setae....... C. sellickensis Sheard, 1939

– Palm of gnathopod 2 normally oblique, each lobe of telson with only 2 apical setae.... C. rubromaculatus ( Stimpson, 1856)