Éditeur(s) : HAL CCSD Paris : Muséum national d'histoire naturelle
Résumé : International audience
The present study aimed to identify the Aetobatus species present in French Polynesia using DNA barcoding. Our study contributesto a better understanding of the distribution of species in the Aetobatus complex, which is necessary for a correct evaluation of the conservation status of the different species.
ISSN: 0399-0974

hal-01325811
https://hal-univ-perp.archives-ouvertes.fr/hal-01325811

Éditeur(s) : HAL CCSD Magnolia Press
Résumé : International audience
Hydroporus rifensis sp. n. is described from Central Rif in northern Morocco. The new species is the first member of the Hydroporus tristis-group to be recorded from the African continent. Analyses of cytochrome oxydase 1 (CO1) and 16S rRNA partial sequences indicate unambiguously that H. rifensis sp. n. is a geographical vicariant of the widespread and common European species Hydroporus gyllenhalii Schiodte, 1841, whose closest Iberian populations are known from southern Spain and southern Portugal. Genetically the two species are very close, but in terms of morphology they differ considerably, to the extent that in several respects H. rifensis sp. n. is more similar to some species of the H. striola-group, the sister clade of the H. tristis-group. The new species differs from H. gyllenhalii notably by its larger size, lighter elytra, stronger pubescence, much finer elytral punctation, morphology of the median prosternum area, and marked differentiation of protarsal claws in male. Hydroporus rifensis sp. n. is the first dytiscid species endemic to the Rif and the second Hydroporus species endemic to Morocco.
ISSN: 1175-5326

hal-01544481
https://hal.archives-ouvertes.fr/hal-01544481
DOI : 10.11646/zootaxa.3841.1.4

Éditeur(s) : HAL CCSD Cambridge University Press
Résumé : International audience
Genetic variation was examined in two complex cases of Indo-Pacific pygmy angelfishes (genus Centropyge; Pomacanthidae). The lemonpeel pygmy angelfish C. flavissima (Cuvier and Valenciennes) has a geographically disjunct Indian vs. Pacific distribution and the individuals from these two regions differ by their colour patterns. Previous research on C. flavissima has shown mitochondrial introgression from two related species, C. eibli in the eastern Indian Ocean and C. vrolikii in the Pacific Ocean. Using the 16S rDNA and the CO1 gene as phylogeographic markers, we found no mitochondrial haplotypes in common between Indian Ocean C. flavissima and C. eibli, confirming partial genetic isolation, albeit recent. Also, we found substantial genetic differences between Indian and Pacific C. flavissima populations at the nuclear ETS-2 intron locus. The Indian Ocean form of C. flavissima, thus geographically isolated by >2000 km distance from its Pacific Ocean counterpart, is described as a new species, Centropyge cocosensis sp. nov. Centropyge cocosensis sp. nov. differs in appearance from C. flavissima in having a conspicuous blue iris and a fainter, bluish eye ring. We also found that the yellow pygmy angelfish C. heraldi Woods and Schultz consists of two genetically distinct entities, one distributed widely in the northern tropical Indo-West Pacific, the other distributed in the southern Pacific Ocean. The name originally given to the blackfin pygmy angelfish, C. woodheadi Kuiter, is here resurrected to designate the latter.
EISSN: 1755-2672

hal-01340521
https://hal-univ-perp.archives-ouvertes.fr/hal-01340521
DOI : 10.1007/s12526-016-0509-y