Integrative taxonomy of herbaceous plants with narrow fragmented distributions: a case study on Primula merrilliana species complex

2021 ◽  
Author(s):  
Xiao He ◽  
Jing‐Jing Cao ◽  
Wei Zhang ◽  
Yong‐Quan Li ◽  
Chao Zhang ◽  
...  
Keyword(s):  
Species Complex ◽  
Integrative Taxonomy ◽  
Herbaceous Plants

scholarly journals Colouration, chaetotaxy and molecular data provide species-level resolution in a species complex of Dicranocentrus (Collembola : Entomobryidae)

2018 ◽  
Vol 32 (6) ◽  
pp. 1298 ◽  
Author(s):  
Feng Zhang ◽  
Daoyuan Yu ◽  
Mark I. Stevens ◽  
Yinhuan Ding
Keyword(s):  
Species Complex ◽  
Instar Larva ◽  
Molecular Data ◽  
Integrative Taxonomy ◽  
Species Level ◽  
Integrative Approach ◽  
Gene Markers ◽  
Late Neogene ◽  
Taxonomic Approach ◽  
Colour Patterns

Integrative taxonomic approaches are increasingly providing species-level resolution to ‘cryptic’ diversity. In the absence of an integrative taxonomic approach, formal species validation is often lacking because of inadequate morphological diagnoses. Colouration and chaetotaxy are the most commonly used characters in collembolan taxonomy but can cause confusion in species diagnoses because these characters often have large intraspecific variation. Here, we take an integrative approach to the genus Dicranocentrus in China where four species have been previously recognised, but several members of the genus have been morphologically grouped as a species complex based on having paired outer teeth on unguis and seven colour patterns. Molecular delimitations based on distance- and evolutionary models recovered four candidate lineages from three gene markers and revealed that speciation events likely occurred during the late Neogene (4–13million years ago). Comparison of intact dorsal chaetotaxy, whose homologies were erected on the basis of first instar larva, further validated these candidates as formal species: D. gaoligongensis, sp. nov., D. similis, sp. nov., D. pallidus, sp. nov. and D. varicolor, sp. nov., and increase the number of Dicranocentrus species from China to eight. Our study further highlights the importance of adequate taxonomy in linking morphological and molecular characters within integrative taxonomy.

scholarly journals Differential response to heat stress among evolutionary lineages of an aquatic invertebrate species complex

2018 ◽  
Vol 14 (11) ◽  
pp. 20180498 ◽  
Author(s):  
Sofia Paraskevopoulou ◽  
Ralph Tiedemann ◽  
Guntram Weithoff
Keyword(s):  
Heat Stress ◽  
Cryptic Species ◽  
Heat Tolerance ◽  
Species Complex ◽  
Environmental Changes ◽  
Integrative Taxonomy ◽  
Sensu Stricto ◽  
Apparent Temperature ◽  
Phenotypic Trait ◽  
Evolutionary Lineages

Under global warming scenarios, rising temperatures can constitute heat stress to which species may respond differentially. Within a described species, knowledge on cryptic diversity is of further relevance, as different lineages/cryptic species may respond differentially to environmental change. The Brachionus calyciflorus species complex (Rotifera), which was recently described using integrative taxonomy, is an essential component of aquatic ecosystems. Here, we tested the hypothesis that these (formerly cryptic) species differ in their heat tolerance. We assigned 47 clones with nuclear ITS1 (nuITS1) and mitochondrial COI (mtCOI) markers to evolutionary lineages, now named B. calyciflorus sensu stricto (s.s.) and B. fernandoi . We selected 15 representative clones and assessed their heat tolerance as a bi-dimensional phenotypic trait affected by both the intensity and duration of heat stress. We found two distinct groups, with B. calyciflorus s.s. clones having higher heat tolerance than the novel species B. fernandoi . This apparent temperature specialization among former cryptic species underscores the necessity of a sound species delimitation and assignment, when organismal responses to environmental changes are investigated.

Integrative Taxonomy of Australian Metopia (Sarcophagidae: Miltogramminae) Reveals a New Species and Challenges Traditional Phylogeny

2020 ◽  
Vol 4 (6) ◽  
Author(s):  
Nikolas P Johnston ◽  
James F Wallman ◽  
Thomas Pape
Keyword(s):  
Phylogenetic Analysis ◽  
Species Complex ◽  
Molecular Phylogenetics ◽  
Taxonomic Revision ◽  
Integrated Approach ◽  
Integrative Taxonomy ◽  
Morphological Data ◽  
Australian Species ◽  
A New Species ◽  
Generic Relationships

Abstract A taxonomic revision of all Australian species of Metopia Meigen (Sarcophagidae: Miltogramminae) is completed using an integrated approach combining molecular and morphological data. Metopia nudibasis (Malloch) is redescribed as a species complex and a new endemic Australian species, Metopia sputnik sp. n., is described. Evidence is presented that Metopia sauteri (Townsend) is absent from Australia and this species is therefore removed from the known Australian fauna. Molecular phylogenetics is used to reconstruct interspecific and generic relationships and support morphology-based species hypotheses. Phylogenetic analysis splits Metopia Meigen into two clades, separated by Aenigmetopia Malloch, rendering the former genus nonmonophyletic. The implications of this are discussed.

scholarly journals Integrative taxonomy resolved species delimitation in a fern complex: A case study of the Asplenium coenobiale complex

2019 ◽  
Vol 27 (11) ◽  
pp. 1205-1220
Author(s):  
Liang Siqi ◽  
Zhang Xianchun ◽  
Wei Ran ◽  
Keyword(s):  
Species Delimitation ◽  
Integrative Taxonomy

Gradual evolution of male genitalia in a sibling species complex of millipedes (Diplopoda : Spirobolida : Rhinocricidae : Anadenobolus)

2003 ◽  
Vol 17 (6) ◽  
pp. 711 ◽  
Author(s):  
Jason E. Bond ◽  
David A. Beamer ◽  
Marshal C. Hedin ◽  
Petra Sierwald
Keyword(s):  
Male Genitalia ◽  
Species Complex ◽  
Unusual Case ◽  
Incomplete Lineage Sorting ◽  
Rapid Change ◽  
Nuclear Gene ◽  
Lineage Sorting ◽  
Gradual Evolution ◽  
Copulatory Structure

Jamaican millipedes in the Anadenobolus species complex provide an unusual case study of arthropods having undergone speciation in the absence of conspicuous divergence of male genitalia. Using landmark-based morphometrics, we examined shape deformation of the male anterior copulatory device in three genetically divergent yet morphologically cryptic species. A multivariate analysis of variance and relative warp analysis of nonuniform components show that although male genitalic shape is statistically different among species, many specimens are 'misplaced' in morphological space, perhaps consistent with a condition analogous to incomplete lineage sorting. A simulation of neutral nuclear gene coalescence suggests that such incomplete sorting is expected, given the depth of mtDNA divergences observed across species. The pronounced contrast between deep molecular v. incomplete genitalic divergence is at odds with the paradigm of selection-driven rapid change in male copulatory structure during arthropod speciation. Alternatively, we suggest that male genitalic divergence is evolving neutrally or in concert with other components of the genome (pleiotropy). Although we recognise the empirical validity of rapid genitalic divergence via sexual selection or sexual conflict, such models must be empirically tested using multiple lines of evidence. Accepting the rapid and divergent hypothesis without such multiple evidence scrutiny may result in a gross underestimation of evolutionary diversity and, subsequently, the misinterpretation of processes shaping genitalic change.

Existence of species complex largely reduced barcoding success for invasive species of Tephritidae: a case study inBactroceraspp.

2014 ◽  
Vol 14 (6) ◽  
pp. 1114-1128 ◽  
Author(s):  
F. Jiang ◽  
Q. Jin ◽  
L. Liang ◽  
A. B. Zhang ◽  
Z. H. Li
Keyword(s):  
Invasive Species ◽  
Species Complex
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