Genetic and taxonomic assessment of the widespread Afrotropical ambrosia beetle Xyleborus principalis (Coleoptera, Scolytinae)

Jordal, Bjarte H.; Tischer, Marta

doi:10.1007/s42690-020-00112-z

Cited by 7 publications

(2 citation statements)

References 10 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In contrast to the mitochondrial COI nucleotide sequence divergence, the observed nuclear gene sequence divergence between the two Cnestus lineages and the results of species delimitation analyses of ArgK indicate that they do not constitute distinct species. Furthermore, these patterns are in line with intraspecific divergence within other xyleborine species (Jordal and Kambestad 2014 ; Gohli et al 2016 ; Cognato et al 2020 ; Jordal and Tischer 2020 ; Smith and Cognato 2022 ). For mitochondrial markers such as COI , barcoding sequence divergence of 2–3% (Ashfaq et al 2016 ; Hebert et al 2003 ) may indicate species boundaries in some insect groups, however, this is not the case for most beetles, and particularly not for inbreeding xyleborine ambrosia beetles (Cognato 2006 ; Cognato et al 2020 ; Smith and Cognato 2022 ).…”

Section: Discussionsupporting

confidence: 68%

Two sympatric lineages of Australian Cnestus solidus share Ambrosiella symbionts but not Wolbachia

Bickerstaff,

Jordal,

Riegler

2023

Heredity

Self Cite

View full text Add to dashboard Cite

Sympatric lineages of inbreeding species provide an excellent opportunity to investigate species divergence patterns and processes. Many ambrosia beetle lineages (Curculionidae: Scolytinae) reproduce by predominant inbreeding through sib mating in nests excavated in woody plant parts wherein they cultivate symbiotic ambrosia fungi as their sole source of nutrition. The Xyleborini ambrosia beetle species Cnestus solidus and Cnestus pseudosolidus are sympatrically distributed across eastern Australia and have overlapping morphological variation. Using multilocus sequencing analysis of individuals collected from 19 sites spanning their sympatric distribution, we assessed their phylogenetic relationships, taxonomic status and microbial symbionts. We found no genetic differentiation between individuals morphologically identified as C. solidus and C. pseudosolidus confirming previous suggestions that C. pseudosolidus is synonymous to C. solidus. However, within C. solidus we unexpectedly discovered the sympatric coexistence of two morphologically indistinguishable but genetically distinct lineages with small nuclear yet large mitochondrial divergence. At all sites except one, individuals of both lineages carried the same primary fungal symbiont, a new Ambrosiella species, indicating that fungal symbiont differentiation may not be involved in lineage divergence. One strain of the maternally inherited bacterial endosymbiont Wolbachia was found at high prevalence in individuals of the more common lineage but not in the other, suggesting that it may influence host fitness. Our data suggest that the two Australian Cnestus lineages diverged allopatrically, and one lineage then acquired Wolbachia. Predominant inbreeding and Wolbachia infection may have reinforced reproductive barriers between these two lineages after their secondary contact contributing to their current sympatric distribution.

show abstract

Section: Discussionsupporting

confidence: 68%

Two sympatric lineages of Australian Cnestus solidus share Ambrosiella symbionts but not Wolbachia

Bickerstaff,

Jordal,

Riegler

2023

Heredity

Self Cite

View full text Add to dashboard Cite

show abstract

“…Monaghan et al, 2005;Vuataz et al, 2013;Bukontaite et al, 2015;Toussaint et al, 2016), a strong connection with the African mainland is by far the most common. Bark beetles are no exception, with either sister groups in the two regions, or most often a recolonization of the African mainland explaining the distribution of groups found in both regions (Jordal, 2013(Jordal, , 2017(Jordal, , 2021bJordal & Tischer, 2020, Eliassen & Jordal, 2021. The origin on Madagascar is often quite ancient, dating back to Eocene, Oligocene or Miocene in the majority of cases.…”

Section: Introductionmentioning

confidence: 99%

Sexual dimorphism and phylogenetic position of Chilodendron (Coleoptera: Curculionidae: Scolytinae) - a long isolated lineage endemic to Madagascar

Jordal¹

2022

Eur. J. Entomol.

Self Cite

View full text Add to dashboard Cite

Chilodendron Schedl, 1953 is resurrected as a valid genus based on Chilodendron planicolle Schedl, 1953. This is the only representative of the tribe Hylesinini Erichson, 1836 found on Madagascar and a molecular phylogenetic analysis of several genes supports a position separate from Hylesinopsis Eggers, 1920 and other putatively close relatives. It is likely that Chilodendron is the oldest living lineage of bark beetles on Madagascar and possibly originated in the late Cretaceous not long after the separation of Madagascar from the Indian subcontinent.

show abstract

Symbiotic Fungi Associated With Xyleborine Ambrosia Beetles (Coleoptera: Curculionidae: Scolytinae) and the Imperative of Global Collaboration

Osborn

Castro

Duong

et al. 2022

Annals of the Entomological Society of America

View full text Add to dashboard Cite

Ambrosia beetles from the tribe Xyleborini are part of nearly all forest ecosystems. Because of their small size, haplodiploid mating structure, and protected lives inside the sapwood of woody plants, they have a unique ability to expand into new regions via inadvertent human transport. A small number of invasive xyleborines cause significant damage to forests, lumber concerns, and agricultural systems. Most ambrosia pests damage or kill trees by the accumulation of beetle attacks, one is known to cause tree death through the introduction of pathogenic fungus into susceptible Lauraceae trees. The relationships between ambrosia fungi and their beetle vectors range from mutualistic symbiosis to facultative association, but most remain unstudied. Unresolved taxonomies, convergent morphologies, and the difficulty of sampling ambrosia fungi over their entire global ranges make comprehensive surveys of ambrosia fungi difficult to achieve. Ambrosia fungi from Europe and North America are moderately well documented, however, we have yet to sufficiently document those from Africa, Asia, Australia, and South America. Worldwide cooperation to improve and standardize scientific study of the ambrosia symbioses is needed to better understand these impactful organisms.

show abstract

Genetic and taxonomic assessment of the widespread Afrotropical ambrosia beetle Xyleborus principalis (Coleoptera, Scolytinae)

Cited by 7 publications

References 10 publications

Two sympatric lineages of Australian Cnestus solidus share Ambrosiella symbionts but not Wolbachia

Two sympatric lineages of Australian Cnestus solidus share Ambrosiella symbionts but not Wolbachia

Sexual dimorphism and phylogenetic position of Chilodendron (Coleoptera: Curculionidae: Scolytinae) - a long isolated lineage endemic to Madagascar

Symbiotic Fungi Associated With Xyleborine Ambrosia Beetles (Coleoptera: Curculionidae: Scolytinae) and the Imperative of Global Collaboration

Contact Info

Product

Resources

About