@unpublished {6524, title = {Mitochondrial phylogenomics reveal the evolutionary, speciation and biogeographical history of fruit flies (Diptera: Tephritidae) UNDER REVIEW}, year = {2024}, abstract = {

Fruit flies (Diptera: Tephritidae) possess high diversity and globally wide distribution, including a range of important agricultural pests. However, the origin, phylogeny and divergence history remain poorly understood. We undertook the first comprehensive mitogenomic study covering phylogenetic reconstruction, divergence time estimation and historical biogeography analyses by analyzing 147 mitochondrial genomes representing three subfamilies, seven tribes, 11 genera and 82 species. The results recovered all the three subfamilies, seven tribes and 11 genera as monophyletic group. Within Dacini subfamily, our phylogeny strongly supported the sister group relationship of (Zeugodacus + Dacus) + Bactrocera, which further supported to raise Zeugodacus as generic level of Dacini. On the other hand, our molecular phylogenetic analyses did not align well with the currently recognized subgeneric designations within Ceratitis, Dacus and Zeugodacus. Some subgenera were recovered as polyphyletic or paraphyletic, implying the incongruence between morphological characters and mitogenomic data. Neither the taxa within the Ceratitis FARQ complex nor those within the Bactrocera dorsalis complex could be clearly distinguished as distinct species corresponding to the morphospecies by mitochondrial phylogenetic tree. Divergence time estimation and historical biogeography analyses indicated that the earliest common ancestor of the Tephritidae, originated in the Palearctic realm at 138.92-71.44 Ma, with the subsequent divergence into Dacinae + Trypetinae and Tephritinae at 115.19-67.45 Ma equally in the Palearctic realm. Dacini might have originated in Laurasia rather than Gondwana and diverged into Bactrocera and Dacus + Zeugodacus at 48.43-28.70 Ma after India plate docked with Laurasia.

}, doi = {10.22541/au.170669169.95739579/v1}, url = {http://dx.doi.org/10.22541/au.170669169.95739579/v1}, author = {Zhang, Yue and Li, Hu and Feng, Shiqian and Qin, Yujia and Meyer, Marc De and Virgilio, Massimiliano and Singh, Sandeep and Jiang, Fan and Priscilla, Kawi Anastasia and Susanto, Agus and Martinez-Sa{\~n}udo, Isabel and Wu, Jiajiao and BADJI, Kemo and Fekrat, Lida and Davaasambuu, Undarmaa and Li, ZHIHONG} } @article {6523, title = {DNA taxonomy reveals high species diversity among the stygobiont genus Metastenasellus (Crustacea, Isopoda) in African groundwater}, journal = {Subterranean Biology}, volume = {48}, year = {2024}, month = {07/02/2024}, pages = {51-71}, abstract = {

This study aimed to explore the species diversity within the isopod genus Metastenasellus in Benin and Cameroon. Compared to other parts of the world, the described diversity of stygobiotic crustaceans in Africa is low due to a dearth of studies and taxonomic expertise. However, recent research activities in Benin and Cameroon suggest higher groundwater diversity than previously envisioned. Recent sampling campaigns in these countries have shown that Metastenasellus is a major group in the underground aquatic environment. The accumulation of biological material provided an opportunity to explore species diversity within the genus using a DNA taxonomy approach based on the cytochrome c oxidase subunit I (COI) gene fragment. Despite the limitations of using a single-locus approach for species delimitation, an overview of the diversity within the genus Metastenasellus was obtained, revealing the presence of 23 distinct lineages. Several elements suggest that most, if not all, of these lineages represent valid species. These include high genetic distances between lineages, morphologically distinct species separated by genetic distances of the same order of magnitude as between other described lineages, and the coexistence of different lineages at the same stations. Despite a limited sampling effort, these first results indicate a high level of species diversity and endemism within Metastenasellus in the studied regions. The narrow geographic distribution of the lineages suggests strong isolation and limited dispersal abilities. This study highlights the potential for discovering a significant number of new species within this genus and emphasizes the need for further research to uncover the extent of diversity in African stygobiotic isopods.

}, isbn = {1768-14481314-2615}, url = {https://doi.org/10.3897/subtbiol.48.113022}, author = {Lagnika, Moissou and Kayo, Raoul Polycarpe Tuekam and Sonet, Gontran and Flot, Jean-Fran{\~A}{\textsection}ois and Martin, Patrick} }