@article{fdi:010060886, title = {{P}henetic structure of two {B}actrocera tau cryptic species ({D}iptera : {T}ephritidae) infesting {M}omordica cochinchinensis ({C}ucurbitaceae) in {T}hailand and {L}aos}, author = {{D}ujardin, {J}ean-{P}ierre and {K}itthawee, {S}.}, editor = {}, language = {{ENG}}, abstract = {{M}orphometric variation with respect to wing venation patterns was explored for 777 specimens of the {B}actrocera tau complex collected in {T}hailand (nine provinces) and {L}aos (one locality). {C}ryptic species {B}. tau {A} and {C} were identified based on their wing shape similarity to published reference images. {I}n {T}hailand, the {B}. tau {A} species was identified in four provinces and the {B}. tau {C} species in seven provinces, and both species in one locality of {L}aos. {T}he objective of the study was to explain the geographic variation of size and shape in two cryptic species collected from the same host ({M}omordica cochinchinensis). {A}lthough collected from the same host, the two species did not show the same morphological variance: it was higher in the {B}. tau {A} species, which currently infests a wide range of different fruit species, than in the {B}. tau {C} species, which is specific to only one fruit ({M}. cochinchinensis). {M}oreover, the two species showed a different population structure. {A}n isolation by distance model was apparent in both sexes of species {C}, while it was not detected in species {A}. {T}hus, the metric differences were in apparent accordance with the known behavior of these species, either as a generalist (species {A}) or as a specialist (species {C}), and for each species our data suggested different sources of shape diversity: genetic drift for species {C}, variety of host plants (and probably also pest-host-relationship) for species {A}. {I}n addition to these distinctions, the larger species, {B}. tau {C}, showed less sexual size and shape dimorphism. {T}he data presented here confirm the previously established wing shape differences between the two cryptic species. {C}haracter displacement has been discussed as a possible origin of this interspecific variation. {T}he addition of previously published data on species {A} from other hosts allowed the testing of the character displacement hypothesis. {T}he hypothesis was rejected for interspecific shape differences, but was maintained for size differences.}, keywords = {{B}actrocera tau ; {P}opulation structure ; {S}exual shape dimorphism ; {S}pecies identification ; {THAILANDE} ; {LAOS}}, booktitle = {}, journal = {{Z}oology}, volume = {116}, numero = {2}, pages = {129--138}, ISSN = {0944-2006}, year = {2013}, DOI = {10.1016/j.zool.2012.07.004}, URL = {https://www.documentation.ird.fr/hor/fdi:010060886}, }