@article{fdi:010048384, title = {{C}ryptic species, gene recombination and hybridization in the genus {S}piraeanthemum ({C}unoniaceae) from {N}ew {C}aledonia}, author = {{P}illon, {Y}ohan and {H}opkins, {H}. {C}. {F}. and {M}unzinger, {J}{\'e}r{\^o}me and {A}mir, {H}. and {C}hase, {M}. {W}.}, editor = {}, language = {{ENG}}, abstract = {{T}he {O}ceanian plant genus {S}piraeanthemum ({C}unoniaceae) has a centre of diversity in {N}ew {C}aledonia, where it is represented by seven species. {I}ts diversification was investigated using two low-copy nuclear genes, ncp{GS} and {G}ap{C}, and phylogenetic analyses were based on maximum parsimony, maximum likelihood and recombination networks. {W}e detected several cases of gene recombination in both datasets, and these have obscured the history within the genus. {F}or {S}. ellipticum and {S}. pubescens, accessions from southern populations on ultramafic soils were genetically distinct from accessions from northern populations on non-ultramafic soils. {G}iven that no obvious morphological characters distinguish northern and southern populations in either taxon, both may be considered as examples of cryptic species. {I}ncongruence between gene trees and species' delimitation may be explained by the parallel evolution of similar morphology, differential lineage sorting leading to differential fixation of alleles or different introgression patterns in the north and south leading to allele displacement. {I}n {N}ew {C}aledonia, some species with broad ecological preferences may thus be artificial concepts. {T}his suggests that they should be treated more critically in monographs and that the species' richness of the {N}ew {C}aledonian flora may be underestimated. {P}roblems associated with the typification of {S}. ellipticum and evidence of hybridization events in the history of {S}piraeanthemum are also discussed.}, keywords = {biodiversity hotspots ; conservation of island endemics ; island biogeography ; single-copy nuclear gene ; {P}acific islands ; serpentine ; taxonomic inflation}, booktitle = {}, journal = {{B}otanical {J}ournal of the {L}innean {S}ociety}, volume = {161}, numero = {2}, pages = {137--152}, ISSN = {0024-4074}, year = {2009}, DOI = {10.1111/j.1095-8339.2009.00997.x}, URL = {https://www.documentation.ird.fr/hor/fdi:010048384}, }