Bumblebees of the hypnorum-complex world-wide including two new near-cryptic species (Hymenoptera: Apidae)

Williams, Paul H.; Dorji, Phurpa; Z, Ren; Xie, Zhenghua; Orr, Michael C.

doi:10.5852/ejt.2022.847.1981

Cited by 4 publications

(1 citation statement)

References 53 publications

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“…(Williams et al 2012b;Williams 2021). Some of the other subgenera have had only a few of the more problematic species-groups reviewed or new species described, including, e.g., Thoracobombus Dalla Torre, 1880 (Brasero et al 2021), Pyrobombus Dalla Torre, 1880 (Williams et al 2009b(Williams et al , 2014(Williams et al , 2022a(Williams et al , 2022cMartinet et al 2018b;Sheffield et al 2020;Potapov et al 2021;Williams 2022a), and Cullumanobombus Vogt, 1911(Williams et al 2012c. In contrast, some recent studies continue to give more emphasis to an interbreeding concept of species, for example in regarding male pheromones as decisive for recognising species (Martinet et al 2018a;Lecocq et al 2019), rather than regarding male pheromones as just one more source of information for integrative analyses (Williams et al 2019(Williams et al , 2020.…”

Section: Revising Bumblebee Taxonomy With a Consistent Species Concep...mentioning

confidence: 99%

Can biogeography help bumblebee conservation?

Williams

2023

EJT

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Bumblebees (Bombus Latreille, 1802), because of their large body size, bright colours and activity at times and places that coincide with biologists, are an example of a group of insects that is particularly well represented in museum collections. This is important if taxonomic revisions are to achieve greater comparability among species. Bumblebees have also attracted particular attention because they are especially ecologically and economically valuable for pollination in north temperate regions, where they are now becoming increasingly threatened. I argue that the what, the where, and the how of effective conservation management may be informed by understanding the divergent characteristics that have affected their biogeographical past: by helping us to see ‘the woods’, not just ‘the trees’, of their habitat needs. Identifying suitable habitat should be part of reconstructing historical biogeography within taxonomic revisions. For bumblebees, for example, biogeographical analysis associates major taxonomic groups either with flower-rich lowland grasslands or with flower-rich montane grasslands, highlighting their contrasting requirements for: nest sites, flowers of different depths, pollen-plant families, and especially the differing importance of early spring and late summer flowers for breeding success. This broad view of species groups helps filter the less important idiosyncrasies from local case studies in order to focus conservation actions.

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Section: Revising Bumblebee Taxonomy With a Consistent Species Concep...mentioning

confidence: 99%

Can biogeography help bumblebee conservation?

Williams

2023

EJT

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Ecological differentiation and sympatry of cryptic species in the Sphagnum magellanicum complex (Bryophyta)

Nieto‐Lugilde,

Piatkowski

et al. 2024

American J of Botany

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PremiseSphagnum magellanicum (Sphagnaceae, Bryophyta) has been considered to be a single semi‐cosmopolitan species, but recent molecular analyses have shown that it comprises a complex of at least seven reciprocally monophyletic groups, that are difficult or impossible to distinguish morphologically.MethodsNewly developed barcode markers and RADseq analyses were used to identify species among 808 samples from 119 sites. Molecular approaches were used to assess the geographic ranges of four North American species, the frequency at which they occur sympatrically, and ecological differentiation among them. Microhabitats were classified with regard to hydrology and shade. Hierarchical modelling of species communities was used to assess climate variation among the species. Climate niches were projected back to 22,000 years BP to assess the likelihood that the North American species had sympatric ranges during the late Pleistocene.ResultsThe species exhibited parallel morphological variation, making them extremely difficult to distinguish phenotypically. Two to three species frequently co‐occurred within peatlands. They had broadly overlapping microhabitat and climate niches. Barcode‐ versus RADseq‐based identifications were in conflict for 6% of the samples and always involved S. diabolicum vs. S. magniae.ConclusionsThese species co‐occur within peatlands at scales that could permit interbreeding, yet they remain largely distinct genetically and phylogenetically. The four cryptic species exhibited distinct geographic and ecological patterns. Conflicting identifications from barcode vs. RADseq analyses for S. diabolicum versus S. magniae could reflect incomplete speciation or hybridization. They comprise a valuable study system for additional work on climate adaptation.

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A taxonomic re-assessment of the widespread oriental bumblebee Bombus flavescens (Hymenoptera, Apidae)

Thanoosing¹,

Orr²,

Warrit³

et al. 2023

JHR

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Bombus flavescens Smith is one of the most widespread bumblebee species in the Oriental region. Due to colour polymorphisms, this species or species-complex has been a challenge for taxonomy. This study aims to assess the taxonomic status of the flavescens-complex using evidence from COI barcodes and morphology. We then reconstruct its biogeographic history from a phylogenetic analysis of populations across the current range, combining COI with 16S and nuclear PEPCK data. Despite a large range of polymorphisms across its distribution, the results show that B. flavescens is a single species based on algorithmic species delimitation methods, and it is clearly separated from its sister species, B. rotundiceps Friese. We suggest that B. flavescens diverged from its sister lineage in the Himalaya and dispersed into Southeast Asia in the Pleistocene. Conservation of the widespread B. flavescens will need to consider its several unique island populations.

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Bumblebees of the hypnorum-complex world-wide including two new near-cryptic species (Hymenoptera: Apidae)

Cited by 4 publications

References 53 publications

Can biogeography help bumblebee conservation?

Can biogeography help bumblebee conservation?

Ecological differentiation and sympatry of cryptic species in the Sphagnum magellanicum complex (Bryophyta)

A taxonomic re-assessment of the widespread oriental bumblebee Bombus flavescens (Hymenoptera, Apidae)

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Bumblebees of the hypnorum-complex world-wide including two new near-cryptic species (Hymenoptera: Apidae)

Cited by 4 publications

References 53 publications

Can biogeography help bumblebee conservation?

Can biogeography help bumblebee conservation?

Ecological differentiation and sympatry of cryptic species in the Sphagnum magellanicum complex (Bryophyta)

﻿A taxonomic re-assessment of the widespread oriental bumblebee Bombus flavescens (Hymenoptera, Apidae)

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A taxonomic re-assessment of the widespread oriental bumblebee Bombus flavescens (Hymenoptera, Apidae)