Species Concepts in the Cylindrocladium floridanum and Cy. spathiphylli Complexes (Hypocreaceae) Based on Multi-allelic Sequence Data, Sexual Compatibility and Morphology

2001 ◽  
Vol 24 (2) ◽  
pp. 206-217 ◽  
Author(s):  
Ji-Chuan Kang ◽  
Pedro W. Crous ◽  
Conrad L. Schoch
Keyword(s):  
Sequence Data ◽  
Species Concepts ◽  
Sexual Compatibility ◽  
Allelic Sequence ◽  
Cylindrocladium Floridanum

Mitochondrial sequence data clarify species concepts in the Cyclocephala mafaffa species complex (Coleoptera: Scarabaeidae: Dynastinae: Cyclocephalini)

Zootaxa ◽  
2020 ◽  
Vol 4772 (1) ◽  
pp. 89-110
Author(s):  
MATTHEW R. MOORE ◽  
STEFANI M. HARRISON ◽  
RONALD D. CAVE ◽  
MARC A. BRANHAM
Keyword(s):  
Species Complex ◽  
Gap Analysis ◽  
Sequence Data ◽  
Species Concepts ◽  
Neighbor Joining ◽  
The West ◽  
Research Attention ◽  
Operational Taxonomic Units ◽  
Floral Visitation ◽  
Morphological Species

The speciose genus Cyclocephala Dejean (Coleoptera: Scarabaeidae: Dynastinae: Cyclocephalini) has attracted research attention due to their diversity, agroeconomic importance, and floral visitation habits. Uniquely among Cyclocephala species, C. mafaffa Burmeister and C. deceptor (Casey), two nearly identical species, are diagnosed by a pronotal character: beaded or not beaded basal pronotal margin. We evaluated these morphological species hypotheses with a phylogenetic analysis of 12S and COI, neighbor-joining analysis, and several single-locus species delimitation procedures (automatic barcode gap analysis and three Poisson tree processes analyses). Together, these analyses supported the species concepts for C. deceptor and C. mafaffa. Delimitation procedures supported several distinct molecular operational taxonomic units among these taxa. We consider the separation of C. deceptor and C. mafaffa to be valid. We conservatively synonymize the West Indian subspecies C. mafaffa grandis Burmeister under C. mafaffa and offer a discussion on subspecific concepts in Cyclocephalini. We designate the lectotype of Stigmalia deficiens Casey. Implications of this study for other geographically widespread cyclocephalines or species with variable pronotal morphology are discussed. 

scholarly journals Using multi-locus allelic sequence data to estimate genetic divergence among four Lilium (Liliaceae) cultivars

2014 ◽  
Vol 5 ◽  
Author(s):  
Arwa Shahin ◽  
Marinus J. M. Smulders ◽  
Jaap M. van Tuyl ◽  
Paul Arens ◽  
Freek T. Bakker
Keyword(s):  
Genetic Divergence ◽  
Sequence Data ◽  
Allelic Sequence

Morphological and molecular data show an enlarged tropical Australian radiation in Synostemon (Phyllanthaceae, Phyllantheae) previously concealed by heteromorphic species concepts

2019 ◽  
Author(s):  
Ian R. H. Telford ◽  
Kanchana Pruesapan ◽  
Peter C. van Welzen ◽  
Jeremy J. Bruhl
Keyword(s):  
New Species ◽  
Sequence Data ◽  
Molecular Data ◽  
Species Concepts ◽  
New Combinations ◽  
Morphological And Molecular Data ◽  
Nrits Sequence

Sauropus elachophyllus (F.Muell. ex Benth.) Airy Shaw and S. rigidulus (F.Muell. ex Müll.Arg.) Airy Shaw are revised under the reinstated genus Synostemon F.Muell. (Phyllanthaceae) using morphological and nrITS sequence data. Sauropus decrescentifolius J.T.Hunter & J.J.Bruhl and S. elachophyllus are shown to be conspecific as Synostemon elachophyllus (F.Muell. ex Benth.) I.Telford & Pruesapan and S. elachophyllus subsp. decrescentifolius (J.T.Hunter & J.J.Bruhl) I.Telford & Pruesapan, with Synostemon elachophyllus subsp. latior (Airy Shaw) I.Telford & Pruesapan (syn. Sauropus elachophyllus var. glaber Airy Shaw p.p.) raised in rank. The ‘Top End clade’ has morphological synapomorphies of fused staminal filaments and connectives, and linear, longitudinal anthers. Four new species are named: Synostemon cowiei I.Telford & J.J.Bruhl, S. inaequisepalus I.Telford & J.J.Bruhl, S. kakadu I.Telford & J.J.Bruhl and S. nitmiluk I.Telford & J.J.Bruhl and new combinations are provided: S. crassifolius (Müll.Arg.) I.Telford & Pruesapan, S. ditassoides (Müll.Arg.) I.Telford & Pruesapan, S. dunlopii (J.T.Hunter & J.J.Bruhl) I.Telford & Pruesapan, S. filicinus (J.T.Hunter & J.J.Bruhl) I.Telford & Pruesapan, S. gracilis (J.T.Hunter & J.J.Bruhl) I.Telford & Pruesapan, S. rigidulus (F.Muell. ex Müll.Arg.) I.Telford & Pruesapan, and S. stenocladus (S.Moore) I.Telford & Pruesapan, with S. pinifolius (J.T.Hunter & J.J.Bruhl) I.Telford & Pruesapan also raised in rank.

scholarly journals The evolving species concepts used for yeasts: from phenotypes and genomes to speciation networks

2021 ◽  
Author(s):  
Teun Boekhout ◽  
M. Catherine Aime ◽  
Dominik Begerow ◽  
Toni Gabaldón ◽  
Joseph Heitman ◽  
...  
Keyword(s):  
Species Concept ◽  
Sequence Data ◽  
Sequence Divergence ◽  
Biological Species ◽  
Species Concepts ◽  
Biological Species Concept ◽  
Sequencing Technology ◽  
Morphological Aspects ◽  
Growth Profiles ◽  
Genome Information

AbstractHere we review how evolving species concepts have been applied to understand yeast diversity. Initially, a phenotypic species concept was utilized taking into consideration morphological aspects of colonies and cells, and growth profiles. Later the biological species concept was added, which applied data from mating experiments. Biophysical measurements of DNA similarity between isolates were an early measure that became more broadly applied with the advent of sequencing technology, leading to a sequence-based species concept using comparisons of parts of the ribosomal DNA. At present phylogenetic species concepts that employ sequence data of rDNA and other genes are universally applied in fungal taxonomy, including yeasts, because various studies revealed a relatively good correlation between the biological species concept and sequence divergence. The application of genome information is becoming increasingly common, and we strongly recommend the use of complete, rather than draft genomes to improve our understanding of species and their genome and genetic dynamics. Complete genomes allow in-depth comparisons on the evolvability of genomes and, consequently, of the species to which they belong. Hybridization seems a relatively common phenomenon and has been observed in all major fungal lineages that contain yeasts. Note that hybrids may greatly differ in their post-hybridization development. Future in-depth studies, initially using some model species or complexes may shift the traditional species concept as isolated clusters of genetically compatible isolates to a cohesive speciation network in which such clusters are interconnected by genetic processes, such as hybridization.

Diversification of the North American Doellingeria-Eucephalus Clade (Astereae: Asteraceae) Inferred from Molecular and Morphological Evidence

2019 ◽  
Vol 44 (4) ◽  
pp. 930-942
Author(s):  
Geraldine A. Allen ◽  
Luc Brouillet ◽  
John C. Semple ◽  
Heidi J. Guest ◽  
Robert Underhill
Keyword(s):  
North American ◽  
Sequence Data ◽  
Phylogenetic Analyses ◽  
Sister Group ◽  
Morphological Evidence ◽  
South American ◽  
New Combinations ◽  
The North ◽  
Hybridization Event ◽  
Ancient Hybridization

Abstract—Doellingeria and Eucephalus form the earliest-diverging clade of the North American Astereae lineage. Phylogenetic analyses of both nuclear and plastid sequence data show that the Doellingeria-Eucephalus clade consists of two main subclades that differ from current circumscriptions of the two genera. Doellingeria is the sister group to E. elegans, and the Doellingeria + E. elegans subclade in turn is sister to the subclade containing all remaining species of Eucephalus. In the plastid phylogeny, the two subclades are deeply divergent, a pattern that is consistent with an ancient hybridization event involving ancestral species of the Doellingeria-Eucephalus clade and an ancestral taxon of a related North American or South American group. Divergence of the two Doellingeria-Eucephalus subclades may have occurred in association with northward migration from South American ancestors. We combine these two genera under the older of the two names, Doellingeria, and propose 12 new combinations (10 species and two varieties) for all species of Eucephalus.

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