Notopoma, LOWRY & BERENTS, 1996

Souza-Filho, Jesser F. & Serejo, Cristiana S., 2014, On the phylogeny of Ischyroceridae (Amphipoda, Senticaudata, Corophiida), with the description of a new genus and eight new species from deep-sea Brazilian waters, Zoological Journal of the Linnean Society 170 (1), pp. 34-85 : 75

KEY TO WORLD SPECIES OF THE GENUS NOTOPOMA LOWRY & BERENTS, 1996

1. Antenna 1 with accessory flagellum present (minute) ............................................................................. 2

– Antenna 1 with accessory flagellum absent...........................................................................................3

2. Gnathopod 2 male propodus with posterior margin undulate........................................... Notopoma cidaridis

– Gnathopod 2 male propodus with posterior margin not undulate........................... Notopoma lowryi sp. nov.

3. Antenna 1 flagellum bearing four or five articles, subequal to peduncle articles 2 and 3 combined (with the exception of Notopoma fluminense )......................................................................................................4

– Antenna 1 flagellum bearing two or three articles, shorter than peduncle articles 2 and 3 combined...............7

4. Mandible palp slender, long; uropod 1 inner ramus 0.8 × outer ramus ............................... Notopoma africana

– Mandible palp robust, short; uropod 1 inner ramus 0.5–0.6 × outer ramus ................................................. 5

5. Gnathopod 2 male carpus with two distal spines ......................................................... Notopoma fallohidea

– Gnathopod 2 male carpus with one distal spine.....................................................................................6

6. Antenna 1 flagellum subequal than peduncle articles 2 and 3 combined; gnathopod 2 male propodus slender and longer than carpus; carpus with convex palm................................................................ Notopoma sismithi

– Antenna 1 flagellum shorter than peduncle articles 2 and 3 combined; gnathopod 2 male propodus broad and subequal to carpus; carpus with oblique palm............................................................ Notopoma fluminense

7. Gnathopod 2 male carpus with a spine midway along posterior margin.....................................................8

– Gnathopod 2 male carpus without a spine midway along posterior margin.................................................9

8. Gnathopod 2 male propodus with rectangular process on posterior margin........................... Notopoma lutkini

– Gnathopod 2 male propodus without process on posterior margin ................................ Notopoma crassicornis

9. Gnathopod 2 male dactylus short, subequal to propodus, distally bifid..................................................... 10

– Gnathopod 2 male dactylus normal, clearly longer than propodus, distally acute ....................................... 12

10. Pleopod 3 present, uniramous....................................................................................... Notopoma moorea

– Pleopod 3 absent ............................................................................................................................ 11

11. Antenna 1 0.3 × body length; pleopod 2 biramous, inner ramus vestigial................ Notopoma teresae sp. nov.

– Antenna 1 0.7 × body length; pleopod 2 uniramous ...................................................... Notopoma stoddartae

12. Gnathopod 2 female propodus linear; antenna 1 peduncle article 1 only slightly produced distally.................... ............................................................................................................................ Notopoma harfoota

– Gnathopod 2 female propodus broadly rectangular or oval; antenna 1 peduncle article 1 strongly produced distally......................................................................................................................................... 13

13. Telson deeply cleft....................................................................................................... Notopoma stoora

– Telson emarginate.................................................................................................... Notopoma opposita corona; inner ramus reduced; outer margin of outer ramus smooth. Uropod 2 biramous; inner ramus reduced; outer margin of outer ramus smooth with robust setae. Uropod 3 uniramous, with recurved spines. Telson wider than long, rectangular, entire, and with spines in patches on the dorsum.