Caridina disparidentata Liang, Yan and Wang, 1984

Ng, Y. Cai and P. K. L. & Ng, Cai P. K. L., 2010, 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, pp. 213-227 : 218-219

Caridina disparidentata Liang, Yan and Wang, 1984

(®gure 5)

Caridina disparidentata Liang, Yan and Wang, 1984: 254 , ®gures 1±12 (type locality: Shihuiyao reservoir, Qujing County, Yunnan).

Caridina heterodentata Liang, Yan and Wang , in Liang and Yan, 1985: 196.

Material examined

HOLOTYPE:, l bl. 21 mm ( SFU: 83-67-01), Shihuiyao reservoir, Qujing County, Yunnan ( SFU).

PARATYPES: One m, cl. 6.0 mm ( SFU: 83-67-02), data same as holotype .

Other specimens. Four ll, cl. 4.2±6.2 mm, two mm, cl. 5.0± 7.4 mm, Maoshan village near Kunming city, Yunnan; July 1978; one m, cl. 5.0 mm, river at Jiankang farm, Maguan County, Yunnan ( IZAS) .

Diagnosis

Rostrum straight, reaching to middle of second segment or end of antennular peduncle. Teeth arrangement extremely variable, armed dorsally with two to 11 teeth, all on carapace, rostrum, or on both carapace and rostrum, ventrally with zero to seven teeth (mode 3±5). Antennular peduncle ca 0.5 times as long as carapace. Carpus of ®rst pereiopod 1.9±2.2 times as long as high, chela 2.1±2.2 times as long as broad. Carpus of second pereiopod 3.7±4.2 times as long as high, chela 2.5±2.7 times as long as broad. Propodus of third pereiopod 3.4±3.8 times as long as dactylus, dactylus with six to seven spinules. Propodus of ®fth pereiopod 3.5±3.9 times as long as dactylus, dactylus with 37±40 spinules. Endopod of male ®rst pleopod subrectangular, ca 3.5 times as long as wide, appendix interna reaching to distal end of endopod. Appendix interna of male second pleopod short, less than 0.25 times as long as appendix masculina. Uropodal diaeresis with 15±18 teeth. Egg size 1.31± 1.40 Ö 0.81±0.98 mm in diameter.

Remarks

Caridina disparidentata diOEers from C. yunnanensi s in the form of the rostrum, which is more variable in the teeth arrangement; the longer dactylus of the third (propodus 3.4±3.8 times as long as dactylus vs 4.0±4.5 times in C. yunnanensi s) and ®fth pereiopods (propodus 3.5±3.9 times as long as dactylus vs 3.8±4.5 times in C. yunnanensi s), the longer endopod of male ®rst pleopod (3.5 times as long as broad vs 2.8±3.0 times) and the short appendix interna (0.25 times as long as appendix masculina vs 0.33 in C. yunnanensi s).

There is some confusion over the correct name for this species. The species was ®rst validly described by Liang et al. (1984) as C. disparidentata from Yunnan. These authors had used a diOEerent manuscript name, C. heterodentata , for the species; the label with this name was still kept with the types of C. disparidentata when the ®rst author examined the material in SFU. But when they published their paper ( Liang et al., 1984), however, they changed its name to C. disparidentata . In a later paper reviewing the Caridina species from Yunnan, however, Liang and Yan (1985) erroneously used their original but unpublished name, C. heterodentata , for the species, apparently forgetting that they had used the name C. disparidentata in their 1984 publication! Caridina heterodentata Liang and Yan, 1985 , must thus be regarded as an unjusti®ed emendation of C. disparidentata Liang, Yan and Wang, 1984 . As both names utilize the same type specimens, both names are objective synonyms and Caridina disparidentat a Liang, Yan and Wang, 1984, is the valid name.

Habitat

Found in reservoirs ( Liang et al., 1984), mountain streams and small rivers (Y. Duan, personal communication).

Distribution Qujing, Maguan Counties and near Kunming city, Yunnan (®gure 1).