scholarly journals ABOUT SPECIES INDEPENDENCE OF POLYSTICHUM SUBTRIPTERON TZVEL.

2016 ◽  
Vol 6 (2) ◽  
pp. 80-86 ◽  
Author(s):  
I. A. Kreshchenok ◽  
T. A. Sinitsyna ◽  
M. G. Kutsev ◽  
S. V. Smirnov ◽  
A. I. Shmakov
Keyword(s):  
Related Species ◽  
Far East ◽  
Genetic Isolation ◽  
Closely Related Species ◽  
Fragment Analysis ◽  
Island Populations ◽  
The Far East ◽  
Dna Fragment ◽  
Morphological Differences ◽  
Range Of Variation

<p>The article discusses the species independence of <em>Polystichum subtripteron</em> Tzvel. The spore structure and size of 2 closely related species – <em>P. subtripteron</em> and <em>P. tripteron </em>were studied. Morphological differences of fronds fit into the overall range of variation; there are no differences in the spore external structure. DNA fragment analysis (ISSR) of 19 specimens of both species was conducted. Fragment analysis revealed no significant differences between <em>P. tripteron </em>and <em>P. subtripteron</em> samples. All differences are probably due to genetic isolation of populations, and the island populations are closer together. On the basis of the research we conclude that in the Far East one species <em>Polystichum tripteron</em> grows, and <em>P. subtripteron</em> can be considered its synonym.</p>

A reassessment of Dioon merolae (Zamiaceae) leads to the description of Dioon salas-moralesae, a new cycad species from Southeastern Oaxaca, Mexico

Phytotaxa ◽  
2021 ◽  
Vol 528 (2) ◽  
pp. 93-110
Author(s):  
JOSÉ SAID GUTIÉRREZ-ORTEGA ◽  
MIGUEL ANGEL PÉREZ-FARRERA ◽  
JEFFREY CHEMNICK ◽  
TIMOTHY J. GREGORY
Keyword(s):  
New Species ◽  
Morphological Variation ◽  
Related Species ◽  
Statistical Tests ◽  
Distinct Species ◽  
Closely Related Species ◽  
Morphometric Variation ◽  
Isthmus Of Tehuantepec ◽  
Morphological Differences ◽  
Recent Evaluation

The cycad genus Dioon comprises 17 species from Mexico and Honduras, all of them delimited based on their morphological variation and geographic distribution. A recent evaluation of the biological variation among Dioon populations from Oaxaca and Chiapas, Mexico, demonstrated that the concept of the species Dioon merolae actually consists of three lineages that should be recognized as different taxa. One lineage was already described as Dioon oaxacensis, leaving the concept of Dioon merolae comprising two lineages distributed on both sides of the Isthmus of Tehuantepec. However, there are conspicuous morphological differences between these two lineages. Here, we tested whether such a differentiation within the concept of Dioon merolae merits the differentiation of two different taxa. We evaluated the qualitative and morphometric variation among populations belonging to the Dioon merolae lineages, and compared it with the closely related species Dioon oaxacensis. Morphological observations and statistical tests demonstrated that the populations of southeastern Oaxaca, traditionally considered as part of Dioon merolae, represent a distinct species that we described as Dioon salas-moralesae. Identifying the diagnostic characters of this new species helps enable an understanding of the criteria that should be considered to delineate the boundaries between other cycad species.

Species delimitation of colour polymorphic Cladophorus (Coleoptera: Lycidae) from New Guinea

Zootaxa ◽  
2017 ◽  
Vol 4320 (3) ◽  
pp. 505 ◽  
Author(s):  
ROMANA KALOUSOVA ◽  
LADISLAV BOCAK
Keyword(s):  
Phylogenetic Analysis ◽  
Mitochondrial Dna ◽  
Related Species ◽  
Species Delimitation ◽  
Morphological Differentiation ◽  
Morphological Characters ◽  
Molecular Data ◽  
Closely Related Species ◽  
Dna Fragment ◽  
Colour Patterns

Cladophorus Guérin-Méneville, 1830 are endemic Papuan net-winged beetles which take part in highly diverse Müllerian mimicry rings. Available specimens were sequenced for cox1–tRNA-Leu–cox2 mitochondrial DNA fragment and the species delimitations were based on the genetic distance, phylogenetic analysis, and morphology. Three earlier described species were identified in the recently collected material and further 10 species are described: C. pallescens sp. nov., C. bicolor sp. nov., C. craterensis sp. nov., C. motykai sp. nov., C. mindikensis sp. nov., C. kailakiensis sp. nov., C. manokwarensis sp. nov., C. haiaensis sp. nov., C. humeralis sp. nov., and C. boceki sp. nov. DNA-based identifications provided some ambiguous results and closely related species could not be robustly delimited using solely molecular data. Additionally, the species limits were based on clearly defined morphological characters and the morphological differentiation was found unlinked from the genetic divergence. Colour patterns cannot be used for identification because all species available in more specimens were polymorphic and followed various local co-mimics. The Papuan fauna of Cladophorus is very diverse and the closely related species regularly occur in limited regions. Differentiation within restricted ranges is therefore considered as the main speciation mode. 

AN ANALYSIS OF INTERSPECIFIC AND INTRASPECIFIC MORPHOLOGICAL DIFFERENCES IN TWO CLOSELY RELATED SPECIES OF AMBLYSEIUS BERLESE USING METHODS OF NUMERICAL TAXONOMY (ACARINA: PHYTOSEHDAE)

1977 ◽  
Vol 109 (12) ◽  
pp. 1605-1618 ◽  
Author(s):  
D.A. Chant ◽  
R.I.C. Hansell ◽  
H.J. Rowell
Keyword(s):  
Host Plant ◽  
Morphological Variation ◽  
Related Species ◽  
Numerical Taxonomy ◽  
Valid Species ◽  
Closely Related Species ◽  
Multivariate Tests ◽  
Taxonomic Methods ◽  
Morphological Differences ◽  
Intraspecific Morphological Variation

AbstractMorphological variation between two closely related species in the genus Amblyseius Berlese was examined by numerical taxonomic methods. Multivariate tests indicated that A. canadensis Chant and Hansell and A. novaescotiae (Chant) represent two separate and distinct morphological groups. This supports their taxonomic retention as valid species. Intraspecific morphological variation was also examined and found to be correlated with climatic and host plant variables.

Supplementary description of three species from the subfamily Cecidophyinae (Eriophyoidea: Eriophyidae) from the Nalepa collection

2018 ◽  
Vol 23 (5) ◽  
pp. 838
Author(s):  
Slavica M. Marinković ◽  
Philipp E. Chetverikov ◽  
Christoph Hörweg ◽  
Radmila Petanović
Keyword(s):  
Natural History ◽  
Related Species ◽  
Host Plants ◽  
Morphological Variability ◽  
Natural History Museum ◽  
Closely Related Species ◽  
History Museum ◽  
Morphological Differences

Supplementary descriptions of three cecidophyine species based on topotype specimens recovered from vials from the Nalepa collection kept in the Natural History Museum (Vienna, Austria) are given: Cecidophyes galii (Karpelles 1884) from Asperula aparine M. Bieb. and Galium mollugo L. (Rubiaceae), Chrecidus ruebsaameni (Nalepa 1895) com. nov. (transferred from Cecidophyopsis) from Andromeda polifolia L. (Ericaceae) and Colomerus bucidae (Nalepa 1904) from Bucida buceras L. (Combretaceae). Observations on the morphological variability of Colomerus bucidae from different host plants are given. Morphological differences between two closely related species, Cecidophyes galii and Cecidophyes rouhollahi Craemer 1999 are discussed. 

Étude caryologique de trois espèces d’Hypochoeris originaires d'Argentine : H. chillensis, H. microcephala var. albiflora et H. megapotamica

1994 ◽  
Vol 72 (10) ◽  
pp. 1496-1502 ◽  
Author(s):  
S. Siljak-Yakovlev ◽  
A. Bartoli ◽  
G. Roitman ◽  
N. Barghi ◽  
C. Mugnier
Keyword(s):  
Chromosome Number ◽  
Related Species ◽  
Secondary Constriction ◽  
Nucleolar Organizer ◽  
Asymmetry Index ◽  
Evolutionary Trend ◽  
Closely Related Species ◽  
Nucleolar Organizers ◽  
Morphological Differences ◽  
Secondary Constrictions

Three Hypochoeris species from Argentina with the same chromosome number (x = 4) and similar karyotypes (typically bimodal) show significant ecological and morphological differences. Comparative cytogenetic analysis was done for these taxa, producing karyotypes with correlated idiograms. The number of secondary constrictions and nucleolar organizers varied. The results from this study are discussed in terms of the mechanisms of microevolution within this group of closely related species, and in terms of the evolutionary trend in the genus and in the tribe Cichorieae. Key words: Hypochoeris, Cichorieae, bimodal karyotype, secondary constriction, nucleolar organizer, asymmetry index.

Chaetogastra cogniauxiana (Melastomataceae), a new Brazilian species from the Chaetogastra gracilis complex

Phytotaxa ◽  
2021 ◽  
Vol 511 (3) ◽  
Author(s):  
FABRÍCIO SCHMITZ MEYER ◽  
RENATO GOLDENBERG
Keyword(s):  
Species Richness ◽  
New Species ◽  
Related Species ◽  
Herbarium Specimens ◽  
Field Observations ◽  
Distribution Map ◽  
Closely Related Species ◽  
Great Species ◽  
Morphological Differences ◽  
Great Species Richness

Eleven varieties of Tibouchina gracilis were indicated as synonyms of Chaetogastra gracilis in the most recent work on the taxonomy of the genus. However, field observations and a more detailed analysis of herbarium specimens, including the types, led us to the conclusion that two of these varieties represent a single new species. Chaetogastra cogniauxiana is endemic to Brazil, and differs from C. gracilis by the smaller size, 10–70 cm tall (versus 30–120 cm tall in C. gracilis), dendritic-setose to dendritic-strigose hypanthium and bracteoles (vs. dendritic-sericeous hypanthium and bracteoles), and smaller petals, 9.8–13.4 × 8.8–9.1 mm (vs. larger petals, 16.5–21.6 × 11.2–14.8 mm). In this article, we provide a complete description of C. cogniauxiana, and indicate the main morphological differences between C. cogniauxiana and the most closely related species. We also provide comments on taxonomy and phylogenetic relationships of this species, photos, illustrations, and a distribution map. This work is part of a monograph of the genus Chaetogastra in Brazil, which showed a great species richness and also the necessity of several taxonomic adjustments.

Mites of the family Parasitidae Oudemans, 1901 (Acari: Mesostigmata) from Japan: a new species of Vulgarogamasus Tichomirov, 1969, and a key to Japanese species

Zootaxa ◽  
2018 ◽  
Vol 4429 (2) ◽  
pp. 379 ◽  
Author(s):  
MOHAMED W. NEGM ◽  
TETSUO GOTOH
Keyword(s):  
New Species ◽  
Related Species ◽  
Japanese Literature ◽  
Key To Species ◽  
Japanese Species ◽  
Closely Related Species ◽  
The Family ◽  
Ibaraki Prefecture ◽  
Morphological Differences ◽  
A New Species

Vulgarogamasus edurus sp. nov. (Acari: Parasitidae) is described based on females, deutonymphs and males extracted from leaf litter and soil in Ami, Ibaraki Prefecture, Japan. Morphological differences between the new species and its closely related species, Vulgarogamasus fujisanus (Ishikawa, 1972), are recorded based on the examination of type materials. Information about parasitid mites reported in Japanese literature is reviewed, and a key to species is provided. 

Description of Dineura pullior sp. n. (Hymenoptera: Tenthredinidae), with quantified observations on saw wear

1995 ◽  
Vol 26 (4) ◽  
pp. 385-392 ◽  
Author(s):  
S. Schmidt ◽  
G.H. Walter
Keyword(s):  
Host Plant ◽  
Sibling Species ◽  
Related Species ◽  
Closely Related Species ◽  
Adult Females ◽  
First Time ◽  
Important Character ◽  
Range Of Variation

AbstractIn sawfly taxonomy the structure of the lancet or the saw is an important character for identification of females. Because adult females use the saw to place eggs into the host plant its teeth may wear and their shape may thus be altered. We investigated the pattern of wear in a species of nematine sawfly that we also describe for the first time. Saw wear of females that deposited known numbers of eggs was examined. Saw wear was not strongly related to the number of eggs laid, despite some saws being considerably worn. The range of variation in saw profile illustrated by Lindqvist (1956) in the closely-related species D. virididorsata (Retzius) was not observed in our study. Despite the shape of the saw being altered to some extent with use, other structures on the saw do not change and provide good taxonomic characters in the genus Dineura, as evidenced by our detection of the cryptic (= sibling) species on the basis of differences in ctenidial structure. We describe this species under the name Dineura pullior sp. n.

Revision of the European Aethes rubigana complex with a description of genetically confirmed Aethes kyrkii sp. n. (Lepidoptera, Tortricidae)

2003 ◽  
Vol 34 (1) ◽  
pp. 3-14 ◽  
Author(s):  
Pekka Lankinen ◽  
Juhani Itämies ◽  
Marko Mutanen
Keyword(s):  
New Species ◽  
Related Species ◽  
Taxonomic Status ◽  
Statistical Analyses ◽  
Enzyme Electrophoresis ◽  
Genetic Isolation ◽  
Closely Related Species ◽  
Palearctic Region ◽  
A New Species

AbstractThe Aethes rubigana complex is shown to comprise four closely related species in the Palearctic region: Eurasian Aethes cnicana (Westwood, 1854), European A. rubigana (Treitschke, 1830), Asiatic A. citreoflava V. I. Kuznetsov, 1966, and A. kyrkii, here described as a new species from northern Finland. A. kyrkii is morphologically most close to A. cnicana, but enzyme electrophoresis revealed complete genetic isolation between them. Descriptions are given of the three species occurring in Europe, and their respective biologies are outlined. Statistical analyses of traits of the forewing are given. The taxonomic status of A. arcticana (Brandt, 1937) is revised.

scholarly journals Biogeographical and evolutionary aspects of a Guineo-Congolian bushcricket tribe: Revision of the genera Cestromoecha Karsch, 1893 and Poreuomena Brunner von Wattenwyl, 1878, with the description of new species (Orthoptera, Tettigoniidae, Phaneropterinae)

2021 ◽  
Vol 68 (1) ◽  
pp. 45-79
Author(s):  
Claudia Hemp ◽  
Bruno Massa
Keyword(s):  
New Species ◽  
Related Species ◽  
The Other ◽  
Congo Basin ◽  
Forest Belt ◽  
Type Specimens ◽  
Closely Related Species ◽  
Rapid Speciation ◽  
Morphological Differences ◽  
Evolutionary Aspects

The genera Cestromoecha and Poreuomena of the tribe Poreuomenini in Phaneropterinae are revised and new generic characters are given for both genera, and six new species are described in Poreuomena. The newly described species are P. biaculeatasp. nov., P. ealasp. nov., P. gracilicercatasp. nov., P. ivorianasp. nov., P. matthaeisp. nov., and P. tshuapasp. nov. Based on characters defining the two genera, three species so far listed under Cestromoecha are transferred to Poreuomena: P. crassipes Karsch, 1890, P. laeglae (Massa, 2015), and P. magnicerca (Massa, 2013). One species of Cestromoecha, C. mundamensis Karsch, 1896, is synonymised with C. tenuipes (Karsch, 1890) since no morphological differences were detected between the type specimens. Thus, two species remain with Cestromoecha, and Poreuomena now contains 16 species. Morphological closely-related species of Poreuomena suggest rapid speciation in the Congo Basin due to several expansions and shrinkages of the Guineo-Congolian forest belt since the Oligocene. At least two different morphological lineages are discernible. On the other hand the genus Cestromoecha Karsch, 1893 is a species-poor taxon.

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