Caridina yunnanensis

Cai, Y. & Ng, P. K. L., 2010, A revision of Caridina yunnanensis and its allied species (Crustacea: Decapoda: Caridea: Atyidae) from Yunnan, southern China, with description of one new species, Journal of Natural History 35 (2), pp. 213-227 : 226-227

Key to species of the Caridina yunnanensis species group

1 Dorsal rostral teeth separated into two groups, ventral margin usually unarmed, rarely with one or two teeth.............. Caridina disjuncta

- Dorsal rostal teeth continuous, not separated into two groups, ventral margin usually with more than two teeth................. 2

2 Antennular peduncle 0.7-0.8 times carapace length; 12 or less spinules on uropodal diaeresis; egg size smaller than 1.2 ✕ 0.78 mm in diameter.... C. dianchiensis

- Antennular peduncle less than 0.7 times carapace length; more than 12 spinules on uropodal diaeresis; egg size larger than 1.2 ✕ 0.78 mm in diameter...... 3

3 Ratio of length of antennular peduncle to carapace length less than 0.55; usually with more than 14 spinules on uropodal diaeresis; ratio of length of appendix interna to appendix masculina of adult male second pleopod about 0.25....... 4

- Ratio of length of antennular peduncle to carapace length 0.55-0.65; usually with 13-14 spinules on uropodal diaeresis; ratio of length of appendix interna to appendix masculina of adult male second pleopod more than 0.3......... 5

4 Carpus of second pereiopod 4.4-4.9 times as long as high; propodus of third pereiopod 3.2-3.4 times as long as dactylus; propodus of fi fth pereiopod 4.0-4.1 times as long as dactylus; endopod of adult male first pleopod 3.0 times as long as wide....................... C. mongziensis

- Carpus of second pereiopod 3.7-4.2 times as long as high; propodus of third pereiopod 3.4-3.8 times as long as dactylus; propodus of fi fth pereiopod 3.5-3.9 times as long as dactylus; endopod of adult male first pleopod 3.5 times as long as wide....................... C. disparidentata

5 Carpus of first pereiopod 1.5 times as long as high, propodus of third pereiopod 3.1-3.5 times as long as dactylus, propodus of fi fth pereiopod 3.2-3.7 times as long as dactylus, egg size 1.35- 1.5 ✕ 0.80-0.85 mm ....... C. yunnanensis

- Carpus of first pereiopod 2.0 times as long as high; propodus of third pereiopod 4.0-4.5 times as long as dactylus; propodus of fi fth pereiopod 3.8-4.5 times as long as dactylus; egg size 1.20- 1.28 ✕ 0.75-0.85 mm ........ C. impensa