Zoological Studies

Vol. 46 No. 6, 2007

Two New Species of the Land-Locked Freshwater Shrimps Genus, Neocaridina Kubo, 1938 (Decapoda: Caridea: Atyidae), from Taiwan, with Notes on Speciation on the Island

Hsi-Te Shih1,* and Yixiong Cai2

1Department of Life Science, National Chung Hsing University, 250 Kuo Kuang Road, Taichung 402, Taiwan
2Biodiversity Center, National Parks Board, 1 Cluny Road, Singapore 256569, Republic of Singapore

Hsi-Te Shih and Yixiong Cai (2007) Two new species of land-locked shrimp, Neocaridina saccam and N. ketagalan (Decapoda: Caridea: Atyidae), are described from Tainan, southwestern Taiwan, and Taipei, northern Taiwan, respectively. Based on morphological and molecular (mitochondrial 16S rRNA and cytochrome oxidase I genes) evidence, both can be distinguished from their congeners. A speciation model for this genus on the island of Taiwan is also proposed based on geological events and molecular clock estimates.

Key words: Neocaridina saccam, N. ketagalan, 16S rRNA, Cytochrome oxidase I, Biogeography.

*Correspondence: Tel and Fax: 886-4-22856496. E-mail:htshih@dragon.nchu.edu.tw