TAXONOMIC REVISION OF NIGERIAN SPECIES OF Capsicum L. BASED ON SOME MORPHOLOGICAL CHARACTERS

Species of Capsicum L. are closely related plants whose taxonomic status has remained controversial among different taxonomists. This study was designed to examine the taxonomic status of the species of Capsicum in Nigeria in order to establish the genetic variation between the species for the purpose of identification, as well as review the infrageneric classification (INC) of the members of the genus. Germplasm collection of the seeds of five cultivars of Capsicum were regenerated and nurtured to fruiting. Variations in their vegetative and reproductive morphology were macroscopically evaluated in replicates of 30 individuals per cultivar for each character, which equals 150 samples altogether. The cultivars of each species was hierarchically clustered as operational taxonomic units (OTUs) using Ward’s method with squared Euclidean distance. Artificial key was also constructed for the identification of the species in the genus. The twenty-three (23) morphological characters adopted gave useful insights into the INC of the species and were sufficiently diagnostic of the species as evidenced by the artificial key. Through this study, some light has been shed on the delimitation of species and varieties of the Nigerian Capsicum.

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Taxonomic significance of vegetative and reproductive morphology in southern Africa Rhynchosia sect. Rhynchosia (Fabaceae: Papilionoideae, Phaseoleae)

Webbia ◽

10.36253/jopt-7965 ◽

2020 ◽

Vol 75 (1) ◽

pp. 51-67

Author(s):

Abdulwakeel Ayokun-nun Ajao ◽

Annah Ntsamaeeng Moteetee

Keyword(s):

Southern Africa ◽

Taxonomic Revision ◽

Morphological Characters ◽

Morphological Data ◽

Herbarium Specimens ◽

Camera Lucida ◽

Reproductive Morphology ◽

Type Section ◽

Size Type ◽

Taxonomic Studies

Rhynchosia is the largest genus in the subtribe Cajaninae, tribe Phaseoleae. Due to the lack of a recent taxonomic revision in the genus, the species are poorly known and as a result, are difficult to identify. As part of our ongoing taxonomic studies on the genus in southern Africa, this paper presents a comparative study of vegetative and floral morphological variation in the 47 species currently recognised in the type section Rhynchosia in the region. This is with a view to provide useful diagnostic morphological characters that can be used to correctly identify species in the type section and in other sections. The study used morphological data from field observation, herbarium specimens, and literature. Stems, leaves, and floral structures were examined with a dissecting microscope. A stereoscope with a camera lucida attachment was used to draw the reproductive morphology. Although morphological characters seem to overlap between the sections, characters such as leaflets size, type of indumentum on leaflet surfaces, stipules shape, type and length of inflorescences, presence or absence of indumentum on standard petals, presence and absence of sculpturing on wing petals, as well as length of upper lobes of the calyx are useful in identifying species.

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Taxonomic revision of the genus Oodera Westwood, 1874 (Hymenoptera, Chalcidoidea, Pteromalidae, Cleonyminae), with description of ten new species

Journal of Hymenoptera Research ◽

10.3897/jhr.63.12754 ◽

2018 ◽

Vol 63 ◽

pp. 73-123 ◽

Cited By ~ 1

Author(s):

Jennifer Werner ◽

Ralph S. Peters

Keyword(s):

Papua New Guinea ◽

Central African Republic ◽

Taxonomic Status ◽

Taxonomic Revision ◽

Morphological Characters ◽

Valid Species ◽

Key To Species ◽

Type Specimens ◽

The World ◽

Nomina Dubia

The world species ofOoderaWestwood, 1874 (Chalcidoidea: Pteromalidae: Cleonyminae: Ooderini) are revised. We examined 115 specimens of this rarely collected genus and based on morphological characters assign 110 specimens to 20 recognised species, of which the following ten are described as new:Ooderacircularicollissp. n.(Morocco),O.felixsp. n.(Central African Republic),O.fidelissp. n.(Vietnam),O.floreasp. n.(Thailand),O.heikewerneraesp. n.(Botswana and South Africa),O.leibnizisp. n.(Papua New Guinea, Malaysia and Phillippines),O.mkomaziensissp. n.(Tanzania),O.namibiensissp. n.(Namibia),O.niehuisorumsp. n.(Egypt and Israel), andO.srilankiensissp. n.(Sri Lanka).OoderamonstrumNikol’skaya, 1952, syn. n., is synonymised underO.formosa(Giraud, 1863). Five specimens could not be assigned to species and are treated asOoderasp. Redescriptions are provided for all previously described valid species.OoderaalbopilosaCrosby, 1909 is excluded fromOoderaand transferred toEupelmusDalman, 1820 (Eupelmidae) asE.albopilosa(Crosby, 1909) n. comb.OoderarufimanaWestwood, 1874 andO.obscuraWestwood, 1874 are treated asnomina dubiabecause we were unable to locate type specimens and the original descriptions are not sufficiently informative to clarify the taxonomic status of these names. Several specimens from North America are identified as introduced specimens of the European speciesO.formosa. We provide images and diagnostic characters for all 20 included species and an identification key to species.

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Taxonomy of the Threadsnakes of the tribe Epictini (Squamata: Serpentes: Leptotyphlopidae) in Colombia

Zootaxa ◽

10.11646/zootaxa.2724.1.1 ◽

2019 ◽

Vol 2724 (1) ◽

pp. 1 ◽

Cited By ~ 7

Author(s):

ROBERTA RICHARD PINTO ◽

PAULO PASSOS ◽

JOSÉ RANCES CAICEDO PORTILLA ◽

JUAN CAMILO ARREDONDO ◽

RONALDO FERNANDES

Keyword(s):

Taxonomic Status ◽

Taxonomic Revision ◽

The United States ◽

Morphological Characters ◽

Neotropical Region ◽

Systematic Position ◽

Colour Pattern ◽

Previous Attempt ◽

Additional Material ◽

Species Descriptions

Threadsnakes of the tribe Epictini are endemic to the New World, occurring from the United States to Argentina, mostly in the Neotropical region. Currently, the taxonomic status of most species is unclear and there has been no previous attempt of a comprehensive taxonomic revision of Neotropical taxa. Taxonomy of the group is a difficult task due to the paucity of geographic samples, general homogeneous morphology and brevity of species descriptions. Therefore, the only way to address the taxonomic status of existing names is through detailed characterization of the types and the search for additional material of the poorly known species. In this study, we evaluated the taxonomic status of the Colombian threadsnakes and report on geographical variation of meristic, morphometric, colour pattern, and hemipenis characters. On the basis of available samples we recognize the following species in Colombia: Epictia goudotii, E. magnamaculata, E. signata, Rena nicefori, Tricheilostoma brevissimum, T. dugandi, T. joshuai and T. macrolepis. We discuss the systematic position of Rena nicefori and propose its allocation in the genus Tricheilostoma based on a unique combination of morphological characters. Furthermore, we provide a key to the representatives of the tribe Epictini in Colombia.

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Le statut des Euphrasia borealis, E. nemorosa et E. stricta dans l'est de l'Amérique du Nord : une analyse numérique

Canadian Journal of Botany ◽

10.1139/b88-303 ◽

1988 ◽

Vol 66 (11) ◽

pp. 2208-2216

Author(s):

Stephen R. Downie ◽

Andrée Quintin ◽

John McNeill

Keyword(s):

North America ◽

Principal Component ◽

Taxonomic Status ◽

Single Species ◽

Morphological Characters ◽

Data Matrix ◽

Cauline Leaf ◽

Operational Taxonomic Units ◽

Considerable Controversy ◽

Discriminant Analyses

The taxonomic status of Euphrasia borealis, E. nemorosa, and E. stricta in eastern North America has been the subject of considerable controversy. A sample of 184 operational taxonomic units were scored for 58 morphological characters, and the resulting data matrix was subjected to cluster and principal component analyses. Two groups were recognized on the basis of bract and upper cauline leaf characters and designated as E. nemorosa and E. stricta. These two groups were then subjected to several discriminant analyses (stepwise, linear, and canonical) using quantitative data. The results do not support the recognition of E. borealis and E. nemorosa as separate taxa. These plants should be treated as a single species, for which the correct name is E. nemorosa. Euphrasia stricta is, however, morphologically distinct from E. nemorosa. Some geographic differentiation was observed between plants of E. nemorosa from Newfoundland and those from Quebec, but not enough to warrant the recognition of infraspecific taxa. No evidence of hybridization between E. nemorosa and E. stricta was found. Key words: Euphrasia borealis, Euphrasia nemorosa, Euphrasia stricta, numerical analysis, North America, hybridization.

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Taxonomic revision of the genus Xenopholis Peters, 1869 (Serpentes: Dipsadidae): Integrating morphology with ecological niche

PLoS ONE ◽

10.1371/journal.pone.0243210 ◽

2020 ◽

Vol 15 (12) ◽

pp. e0243210

Author(s):

Daniel Faustino Gomes ◽

Josué Azevedo ◽

Roberta Murta-Fonseca ◽

Søren Faurby ◽

Alexandre Antonelli ◽

...

Keyword(s):

Ecological Niche ◽

Ecological Niche Modeling ◽

Taxonomic Status ◽

Taxonomic Revision ◽

Morphological Characters ◽

Color Pattern ◽

Disjunct Distribution ◽

Valid Species ◽

Similar Species ◽

Reliable Identification

A reliable identification and delimitation of species is an essential pre-requisite for many fields of science and conservation. The Neotropical herpetofauna is the world’s most diverse, including many taxa of uncertain or debated taxonomy. Here we tackle one such species complex, by evaluating the taxonomic status of species currently allocated in the snake genus Xenopholis (X. scalaris, X. undulatus, and X. werdingorum). We base our conclusions on concordance between quantitative (meristic and morphometric) and qualitative (color pattern, hemipenes and skull features) analyses of morphological characters, in combination with ecological niche modeling. We recognize all three taxa as valid species and improve their respective diagnosis, including new data on color in life, pholidosis, bony morphology, and male genitalia. We find low overlap among the niches of each species, corroborating the independent source of phenotypic evidence. Even though all three species occur in the leaf litter of distinct forested habitats, Xenopholis undulatus is found in the elevated areas of the Brazilian Shield (Caatinga, Cerrado and Chaco), whereas X. scalaris occurs in the Amazon and Atlantic rainforests, and X. werdingorum in the Chiquitanos forest and Pantanal wetlands. We discuss the disjunct distribution between Amazonian and Atlantic Forest snake species in the light of available natural history and ecological aspects. This study shows the advantages of combining multiple data sources for reliable identification and circumscription of ecologically similar species.

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A taxonomic revision of the hover wasp genus Eustenogaster van der Vecht (Insecta: Hymenoptera; Vespidae, Stenogastrinae)

Zootaxa ◽

10.11646/zootaxa.1556.1.1 ◽

2007 ◽

Vol 1556 (1) ◽

pp. 1-30 ◽

Cited By ~ 4

Author(s):

FUKI SAITO ◽

JUN-ICHI KOJIMA

Keyword(s):

New Species ◽

Southeast Asia ◽

Southern China ◽

Taxonomic Status ◽

Taxonomic Revision ◽

Morphological Characters ◽

Key To Species ◽

Three New Species ◽

Species Descriptions

A taxonomic revision is given for the stenogastrine genus Eustenogaster van der Vecht, 1969, which is distributed from India to Southeast Asia and southern China. A total of 15 species, including three new species (E. fumipennis Saito, sp. nov., E. latebricola Saito, sp. nov. and E. spinicauda Saito, sp. nov.), are recognized in the genus. A key to species, descriptions of the new species, and notes on taxonomic status, morphological characters and distribution records of the previously described taxa are given.

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Study of genetic diversity in wild raspberry (Rubus idaeus L.) germplasm collection using morphological characters and RAPD markers

Biologija ◽

10.2478/v10054-008-0013-9 ◽

2008 ◽

Vol 54 (2) ◽

pp. 66-74 ◽

Cited By ~ 2

Author(s):

Jolanta Patamsytė ◽

Donatas Žvingila ◽

Juozas Labokas ◽

Virgilijus Baliuckas ◽

Laimutė Balčiūnienė ◽

...

Keyword(s):

Genetic Diversity ◽

Rapd Markers ◽

Germplasm Collection ◽

Morphological Characters ◽

Rubus Idaeus

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Genetic Analysis of Chinese Cucumber Collections in the U.S. National Germplasm Collection

HortScience ◽

10.21273/hortsci.33.3.534e ◽

1998 ◽

Vol 33 (3) ◽

pp. 534e-534 ◽

Cited By ~ 1

Author(s):

J. Staub ◽

Felix Sequen ◽

Tom Horejsi ◽

Jin Feng Chen

Keyword(s):

Genetic Diversity ◽

Principal Component Analysis ◽

Genetic Variation ◽

Genetic Analysis ◽

Allelic Variation ◽

Germplasm Collection ◽

Principal Component ◽

Isozyme Loci ◽

National Plant Germplasm System ◽

The U.S

Genetic variation in cucumber accessions from China was assessed by examining variation at 21 polymorphic isozyme loci. Principal component analysis of allelic variation allowed for the depiction of two distinct groupings of Chinese accessions collected in 1994 and 1996 (67 accessions). Six isozyme loci (Gpi, Gr, Mdh-2, Mpi-2, Pep-gl, and Pep-la) were important in elucidating these major groups. These groupings were different from a single grouping of Chinese 146 accessions acquired before 1994. Allelic variation in Chinese accessions allowed for comparisons with other accessions in the U.S. National Plant Germplasm System (U.S. NPGS) collection grouped by continent and sub-continent. When Chinese accessions taken collectively were compared with an array of 853 C. sativus U.S. NPGS accessions examined previously, relationships differed between accessions grouped by country or subcontinent. Data indicate that acquisition of additional Chinese and Indian cucumber accessions would be strategically important for increasing genetic diversity in the U.S. NPGS cucumber collection.

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Disentangling relationships among eastern Mediterranean Cymbalaria including description of a novel species from the southern Peloponnese (Greece)

Plant Systematics and Evolution ◽

10.1007/s00606-020-01730-3 ◽

2021 ◽

Vol 307 (2) ◽

Author(s):

Pau Carnicero ◽

Núria Garcia-Jacas ◽

Llorenç Sáez ◽

Theophanis Constantinidis ◽

Mercè Galbany-Casals

Keyword(s):

Eastern Mediterranean ◽

Phylogenetic Analyses ◽

Taxonomic Revision ◽

Distribution Patterns ◽

Morphological Characters ◽

Molecular Data ◽

Morphological Data ◽

Long Distance ◽

Aegean Islands ◽

Molecular Phylogenetic

AbstractThe eastern Mediterranean basin hosts a remarkably high plant diversity. Historical connections between currently isolated areas across the Aegean region and long-distance dispersal events have been invoked to explain current distribution patterns of species. According to most recent treatments, at least two Cymbalaria species occur in this area, Cymbalaria microcalyx and C. longipes. The former comprises several intraspecific taxa, treated at different ranks by different authors based on morphological data, evidencing the need of a taxonomic revision. Additionally, some populations of C. microcalyx show exclusive morphological characters that do not match any described taxon. Here, we aim to shed light on the systematics of eastern Mediterranean Cymbalaria and to propose a classification informed by various sources of evidence. We performed molecular phylogenetic analyses using ITS, 3’ETS, ndhF and rpl32-trnL sequences and estimated the ploidy level of some taxa performing relative genome size measures. Molecular data combined with morphology support the division of traditionally delimited C. microcalyx into C. acutiloba, C. microcalyx and C. minor, corresponding to well-delimited nrDNA lineages. Furthermore, we propose to combine C. microcalyx subsp. paradoxa at the species level. A group of specimens previously thought to belong to Cymbalaria microcalyx constitute a well-defined phylogenetic and morphological entity and are described here as a new species, Cymbalaria spetae. Cymbalaria longipes is non-monophyletic, but characterized by being glabrous and diploid, unlike other eastern species. The nrDNA data suggest at least two dispersals from the mainland to the Aegean Islands, potentially facilitated by marine regressions.

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