Year of Publication
2022

Journal

Zoosystema
Volume
44
Issue
18
Number of Pages
463-474
DOI
10.5252/zoosystema2022v44a18
URL
https://bioone.org/journals/zoosystema/volume-44/issue-18/zoosystema2022v44a18/West-Side-Story--A-molecular-and-morphological-study-of/10.5252/zoosystema2022v44a18.full
ISBN Number
0000753777
HCERES category
ACL - Articles in international or national peer-reviewed journals indexed by HCERES or in international databases
Abstract

Numerous specimens of freshwater shrimps identified as Caridina longicarpus Roux, 1926 were recently collected from New Caledonia. Following an integrative taxonomy approach, they were morphologi- cally and genetically studied. Results of a 16S mtDNA analysis showed that the specimens initially identified as C. longicarpus were distributed in two geographically structured clades. Morphological study showed that the shrimps found in rivers draining to the east coast of the island belonged to C. longicarpus sensu stricto, whereas those from rivers draining to the west coast belonged to a new species, here described as Caridina occidentalis n. sp. Detailed redescription of C. longicarpus is pro- vided and a lectotype is designated. The existence of both species in allopatry could be explained by local biogeographical factors such as the topography of the island or oceanic circulation impacting the dispersal of larvae during the planktonic stage.