@article {9696, title = {Genetic variability of New Caledonian Boeckella de Guerne \& Richard, 1889 (Copepoda: Calanoida), with the description of a new species}, journal = {Journal of Crustacean Biology}, volume = {44}, year = {2024}, pages = {1{\textendash}17}, abstract = {Thirteen new freshwater populations of the copepod genus Boeckella De Guerne \& Richard, 1889 were found during three expeditions to New Caledonia ( La Planete Revisitee, 2016-2018). The 12 populations from the Plaine des Lacs, which show remarkable genetic diversity among themselves, were identified as B. spinogibba Defaye, 1998, the only species of its genus known from New Caledonia until now. The sole exception, the population from Mont-Dore 22 km further east, appeared genetically and morphologically distinct from the others and is described herein as a new species. The two species are distinguished from each other by the shapes of the male and female P5, female Th5, and body colour. A previously published key is amended to separate the species. Our concatenated COI+28S phylogeny places the two New Caledonia species as a new branch within Boeckella, distinct from the branches consisting of South American, Antarctic and Australasian species. All 13 Boeckella populations inhabit the extreme south of New Caledonia, an area known for endemism and high heavy metal concentrations in the soil. Extensive mining activity in this metal-rich area, begun in 1873, is now leading to conflict with conservation goals. By using aerial photographs to trace the fate of the pond that is the type locality of B. spinogibba, we confirmed that it disappeared between 2007 and 2014 as a result of the expansion of the Goro nickel mine.}, keywords = {Boeckella spinogibba, Conservation, Crustacea, freshwater zooplankton, micro-endemism, mining perturbation, morphology, Phylogeny, population genetics}, issn = {1937240X}, doi = {10.1093/jcbiol/ruae001}, author = {Royaux, Coline and Charpin, Nicolas and Nicolas Rabet} } @article {9646, title = {An integrative taxonomic revision of the freshwater atyid shrimps (Crustacea: Decapoda: Caridea) of Micronesia}, journal = {Diversity}, volume = {16}, year = {2024}, month = {03/2024}, pages = {1-31}, abstract = {Twelve species of atyid shrimps are reported from three Micronesian islands (Babeldaob, Pohnpei, and Guam) and studied using a combined morphological and molecular approach. Among them, three are new records for the area (Caridina appendiculata, Caridina lobocensis, and Caridina rubella), while three new species are here described: Atyoida chacei sp. nov., Caridina ponapensis sp. nov., and Caridina rintelenorum sp. nov. Descriptions for these new species, diagnoses for poorly known species, and taxonomic notes are provided herein and their biogeography is discussed.}, keywords = {16S, amphidromy, Atyidae, DNA, island, morphology}, doi = {10.3390/d16040200}, url = {https://www.mdpi.com/1424-2818/16/4/200}, author = {de Mazancourt, Valentin and Marquet, G{\'e}rard and Keith, Philippe} } @article {5929, title = {Resurrection of Caridina natalensis De Man, 1908 (Crustacea: Decapoda: Atyidae) in the South Western Indian Ocean}, journal = {Zootaxa}, volume = {4543}, year = {2019}, pages = {375-387}, abstract = {

Numerous specimens of a freshwater shrimp with small eggs belonging to the Caridina nilotica complex collected in the South Western Indian Ocean were studied and compared with recent and old collection specimens genetically (16S mito-chondrial analysis for recent and type specimens) and morphologically. The results revealed that, in the Indian Ocean, what has been identified by several authors under various species names of the complex C. nilotica, was in fact C. natal-ensis De Man, 1908. This valid species is re-described and compared with closely related species, often confused with it in this area: C. brachydactyla De Man, 1908, C. brevidactyla Roux, 1920, C. gracilipes De Man, 1892 and C. longirostris H. Milne Edwards, 1837.

}, keywords = {16S, Caridina, Comoros, Integrative taxonomy, Madagascar, Mayotte, morphology, Seychelles, South Africa}, author = {de Mazancourt, Valentin and Mlambo, MC and Castelin, Magalie and Renneville, C and Marquet, G{\'e}rard and Philippe Keith} } @article {6040, title = {Revision of freshwater shrimps belonging to Caridina weberi complex (Crustacea: Decapoda: Atyidae) from Polynesia with discussion on their biogeography}, journal = {Journal of Natural History}, volume = {53}, year = {2019}, pages = {815{\textendash}847}, abstract = {

Caridina weberi, an emblematic species of the {\textquoteleft}C. weberi complex{\textquoteright}, was described by De Man in 1892 from different localities in Indonesia. Until now, this species was thought to have a wide distribution in Polynesia. Numerous specimens identified as C. weberi were collected recently from various Polynesian islands. In the context of integrative taxonomy, they were morphologically and genetically studied. Three new species allied to C. weberi are here described: C. marquesensis n. sp., C. futunensis n. sp. and C. tupaia n. sp. The occurrence of C. rapaensis, another species part of the {\textquoteleft}C. weberi{\textquoteright} complex is confirmed. Descriptions or redescription of these species are given as well as their geographical and ecological distributions. The position of these species in the complex is clarified. A key is provided to facilitate identification.

}, keywords = {16S, freshwater shrimp, genetic, Integrative taxonomy, morphology}, doi = {https://doi.org/10.1080/00222933.2019.1612959}, author = {de Mazancourt, Valentin and Marquet, G{\'e}rard and Philippe Keith} } @article {5928, title = {Integrative taxonomy helps separate four species of freshwater shrimps commonly overlooked as Caridina longirostris (Crustacea: Decapoda: Atyidae) in Indo-West Pacific islands.}, journal = {Invertebrate systematics}, volume = {32}, year = {2018}, pages = {1422{\textendash}1447}, abstract = {

Caridina longirostris H. Milne Edwards, 1837 described from specimens supposedly from La Macta River near Oran, Algeria, is an emblematic species of the {\textquoteleft}C. nilotica complex{\textquoteright}. Until now this species was thought to have a wide distribution in the Indo-Pacific region. Recently, numerous specimens identified as C. longirostris were collected from various Indo-West Pacific localities. In the context of integrative taxonomy, both old and newly collected specimens were morphologically and genetically studied. Four species allied to C. longirostris are here identified: C. appendiculata Jalihal \& Shenoy, 1998, C. brevidactyla Roux, 1920, C. gracilipes De Man, 1892 and C. meridionalis Roux, 1926. Detailed re-descriptions of these four species are given as well as their geographical and ecological distributions. Caridina nilotica var. brevidactyla is revalidated as the species C. brevidactyla, and C. coulaborensis Richard\&Clark, 2014, C. fritzi Richard \& Clark, 2014 and C. solamulieres Richard \& Clark, 2014 are considered junior synonyms of C. meridionalis. The position of these species in the troublesome {\textquoteleft}C. nilotica complex{\textquoteright} is clarified and some species are synonymised. A key is provided to facilitate identification.

}, keywords = {16S rRNA, Indo-Pacific region, morphology}, author = {de Mazancourt, Valentin and Marquet, G{\'e}rard and Klotz, Werner and Philippe Keith} } @article {5019, title = {Genetic and morphological evidence for cryptic species in Macrobrachium australe and resurrection of M. ustulatum (Crustacea, Palaemonidae)}, journal = {European Journal of Taxonomy}, volume = {289}, year = {2017}, month = {03/2017}, pages = {1{\textendash}27}, abstract = {

\ Macrobrachium australe is an amphidromous prawn living in the insular freshwater systems of the Indo-Pacific. Because it possesses few informative morphological characters, that often vary from one habitat to another, M. australe has produced much taxonomic confusion and has historically been described under eight synonyms. Here, 53 specimens collected throughout the Indo-Pacific under the name M. australe were phylogenetically and morphologically examined. Results revealed that what has been called M. australe belongs to at least two distinct species: M. australe, distributed from the Southwest Indian Ocean to the Central Pacific Ocean, and a cryptic species potentially restricted to the Northwest Pacific Ocean, here identified as M. ustulatum, which until now was considered as a junior synonym. Although they are not quite found in the same habitat (lentic-lotic), the presence of these distinct, and reciprocally monophyletic entities in the same rivers on the islands of Palau and Santo strongly favors the hypothesis of two reproductively isolated entities. Six morphological characters, including the proportions of the joints of the male second pereiopod, the shape of the epistome lobe and the armature of the fourth thoracic sternite, are evidenced as diagnostic. A neotype of M. australe is designated and deposited in the Mus{\'e}um national d{\textquoteright}Histoire naturelle in Paris.

}, keywords = {Amphidromous prawn, Indo-West Pacific, morphology, multi-locus phylogeny}, author = {Castelin, Magalie and de Mazancourt, Valentin and Marquet, G{\'e}rard and Zimmermann, Gabrielle and Philippe Keith} } @article {5023, title = {The {\textquotedblleft}Pinocchio-shrimp effect{\textquotedblright}: first evidence of variation in rostrum length with the environment in Caridina H. Milne-Edwards, 1837 (Decapoda: Caridea: Atyidae)}, journal = {Journal of Crustacean Biology}, volume = {37}, year = {2017}, month = {05/2017}, pages = {243-248}, abstract = {

External morphology has always been the first criterion used to separate species of shrimps,

especially in the freshwater genus Caridina H. Milne-Edwards, 1837, but more doubts have been

expressed regarding the relevance of some of the morphological characters. We collected 27

specimens of Caridina from seven different localities during field work conducted on the island

of Pohnpei (Federated States of Micronesia). After genetic verification that they all belonged to

the same species, 19 morphological variables were measured and correlated with the elevation

of the collecting stations using correlation analyses. We provide evidence that the length of the

rostrum showed strong negative correlation with the elevation. This could be explained either

by the physical stress exerted on the rostrum by the stronger water currents in the stations at a

higher elevation, as a defence against predators in the lower stations, or a combination of both

possibilities. The taxonomy of these shrimps is thus challenging and should not rely only on

rostrum length, but on other characters such as the number of teeth on the dorsal margin of

the carapace, which is not correlated with rostrum length and therefore, with the environment.

}, keywords = {correlation analysis, effect of elevation, freshwater shrimps, Micronesia, morphology, taxonomy}, author = {de Mazancourt, Valentin and Marquet, G{\'e}rard and Philippe Keith} }