Coralliocaris

Mitsuhashi, Masako & Takeda, Masatsune, 2008, Identity of the coral-associated pontoniine shrimp species, Coralliocaris nudirostris (Heller, 1861) and C. venusta Kemp, 1922 (Crustacea: Decapoda: Palaemonidae), with descriptions of two new species, Zootaxa 1703, pp. 1-24 : 21-22

Key to species of Coralliocaris

1. Lateral margin of dactylus of second pereiopod strongly convex and semicircular..................................2

- Lateral margin of dactylus nearly straight or abruptly angled....................................................................4

2. Rostrum with one dorsal tooth, unarmed on ventral margin ........................................................................ .............................................................................................. C. macrophthalma (H. Milne Edwards, 1837)

- Rostrum usually with 4 or 5 dorsal teeth, 1 or 2 ventral teeth; first pereiopods slender, chela about 4 times as long as width..........................................................................................................................................3

3. Basis of first pleopod with flattened setae on dorsal surface in males and young; posterior ventral angle of fifth abdominal segment acute ........................................................................... C. graminea ( Dana, 1852)

- Basis of first pleopod without setae on dorsal surface; posterior ventral angle of fifth abdominal segment

rounded ..................................................................................................................... C. viridis Bruce, 1974 4. Lateral margin of dactylus of second pereiopod abruptly angled; rostrum usually with 4 or 5 dorsal teeth.....................................................................................................................................................................5

- Lateral margin of dactylus of second pereiopod nearly straight, not angled, cutting edge with 1 to 3 triangular teeth; rostrum with 0 to 5 dorsal teeth...............................................................................................6

5. Third maxilliped with penultimate segment less than twice as long as wide; cutting edge of fixed finger with 2 teeth; dactylus of third to fifth pereiopods tipped with small projection, hook-shaped protuberance strong ................................................................................................................... C. superba ( Dana, 1852)

- Third maxilliped with penultimate segment more than twice as long as wide; cutting edge of fixed finger with oval fossa; dactylus of third to fifth pereiopods without small projection on tip, hook-shaped protuberance not strongly curved ....................................................... C. taiwanensis ( Fujino and Miyake, 1972)

6. Dactylus of second pereiopod smooth and without longitudinal ridge on medial surface; rostrum unarmed.....................................................................................................................................................................7

- Dactylus of second pereiopod with longitudinal ridge on medial surface; rostrum unarmed or armed.....8

7. Dactylus of second pereiopod roundly convex at distal half of cutting edge, cutting edge with 1 or 2 triangular teeth .................................................................................................. C. brevirostris Borradaile, 1898

- Dactylus of second pereiopod smoothly concave at distal half of cutting edge; movable finger with three triangular teeth on cutting edge ....................................... C. tridens Mitushashi, Takeda and Fujino, 2001

8. Rostral eave smoothly angled; colour in life whitish with fine longitudinal whitish yellow stripes on body and scattered yellow and red dots on appendages .................................... Coralliocaris labyrintha sp. nov.

- Rostral eave nearly straight; colour in life with large white spots or with fine black longitudinal stripes on body............................................................................................................................................................9

9. Fingers of first pereiopod forming concavity on medial surface; colour in life with large white patches ... ............................................................................................................................ C. nudirostris Heller, 1861

- Fingers of first pereiopod without concavity on medial surface; colour in life with fine black striate ........ ........................................................................................................................ Coralliocaris sandyi sp. nov.