Chelicorophium, Bousfield & Hoover, 1997

Copilaș-Ciocianu, Denis & Sidorov, Dmitry, 2022, Taxonomic, ecological and morphological diversity of Ponto-Caspian gammaroidean amphipods: a review, Organisms Diversity & Evolution (New York, N. Y.) 22 (2), pp. 285-315 : 309

Key to species of Chelicorophium

1. Antenna 2 peduncular article 4 distal tooth simple ... C. monodon

- Antenna 2 peduncular article 4 distal tooth with an additional simple or bidentate tooth ........................................ 2

2. Antenna 2 peduncular article 4 distal tooth with an additional simple tooth ..................................................... 3

- Antenna 2 peduncular article 4 distal tooth with an additional bidentate tooth ......................................................... 6

3. Pereopods 3–4 meral articles stout, length is less than twice the width ........................................... C. mucronatum

- Pereopods 3–4 meral articles slender, length is twice the width ........................................................................... 4

4. Antenna 2 peduncular article 5 with a proximal and distal tooth ..................................................... C. chelicorne

- Antenna 2 peduncular article 5 with either a proximal or distal tooth .................................................................... 5

5. Antenna 2 peduncular article 5 with a small proximal tooth, distal tooth missing .................................... C. nobile

- Antenna 2 peduncular article 5 with a strong distal tooth, proximal tooth missing ..................... C. spinulosum .

6. Antenna 2 peduncular article 5 with a proximal and distal tooth ........................................................................ 7

- Antenna 2 peduncular article 5 with a proximal tooth only ................................................................................... 8

7. Antenna 2 peduncular article 5 proximal tooth situated in the distal half of the article, inner side of uropod 1 peduncle without spines ............................... C. maeoticum

- Antenna 2 peduncular article 5 proximal tooth situated in the proximal half of the article, inner side of uropod 1 peduncle with spines ....................................... C. robustum

8. Antenna 1 flagellum as long as peduncle .................... ......................................................................... C. sowinskyi

- Antenna 1 flagellum half as long as peduncle .............. .................................................................... C. curvispinum