scholarly journals ALLО- AND SYMPATRIC SIBLING SPECIES OF SACCHARОMYСES CEREVISIAE: DNA-DNA REASSOCIATION

2009 ◽  
Vol 7 (4) ◽  
pp. 3-7 ◽  
Author(s):  
Yuliya V Mikhailova ◽  
Sofia Castello ◽  
Elena S Naumova ◽  
Gennadiy I Naumov
Keyword(s):  
Sibling Species ◽  
Biological Species ◽  
Dna Homology ◽  
Reciprocal Translocations ◽  
Dna Reassociation ◽  
First Time

Precise DNA-DNA reassociation data were obtained for new biological species S. cariocanus, S. kudriavzevii and S. mikatae, for the first time. The three species showed 25-51 % - of DNA-DNA reassociation with one another and with the known species S. cerevisiae, S. bayanus and S. paradoxus.Only in the combination S. paradoxus × S. cariocanus there was 99 % DNA-DNA homology. Despite high DNA-DNA reassociation value, the two yeasts are genetically isolated: their hybrids are sterile forming non-viable meiotic products (ascospores). Having four reciprocal translocations in its karyotype, S. cariocanus represents species in statu nascendi.

scholarly journals Genetic identification of the yeast Saccharomyces kudriavzevii from European population

2009 ◽  
Vol 7 (1) ◽  
pp. 9-11
Author(s):  
Gennadiy I Naumov
Keyword(s):  
Biological Species ◽  
European Population ◽  
Hybridization Analysis ◽  
Genetic Identification ◽  
Saccharomyces Kudriavzevii ◽  
First Time

Using genetic hybridization analysis we showed for the first time that Portuguese isolates belong to the biological species Saccharomyces kudriavzevii Naumov et al. (2000). Earlierthis species was described on Japanese isolates. Divergence of Portuguese and Japanese S. kudriavzevii populations, as well as different S. cerevisiae populations, on molecular galactose markers is discussed.

Genus Camptocercus (Cladocera: Anomopoda: Chydoridae) in North America

Zootaxa ◽  
2018 ◽  
Vol 4459 (3) ◽  
pp. 583
Author(s):  
ARTEM Y. SINEV
Keyword(s):  
North America ◽  
Sibling Species ◽  
Atlantic Coast ◽  
Valid Species ◽  
Central Usa ◽  
First Time

Genus Camptocercus is represented in North America by four species. Camptocercus rotundus Herrick, 1882 is proved to be a valid species and is redescribed here. C. rotundus differs from its sibling species, neotropical C. dadayi Stingelin, 1913, in morphology of the postabdominal claw, presence of posteroventral denticles on valves, and morphology of the male postabdomen. C. rotundus is distributed in South Canada and North USA from Pacific to Atlantic coast, whereas C. dadayi is found in Mexico and South-East USA. C. oklahomensis Mackin, 1930 is found in Central USA. C. streletskaye Smirnov, 1998, previously known from Chukotka and Magadan Area of Russia, was found in Alaska for the first time. 

Saccharomyces paradoxus and Saccharomyces cerevisiae are associated with exudates of North American oaks

1998 ◽  
Vol 44 (11) ◽  
pp. 1045-1050 ◽  
Author(s):  
Gennadi I Naumov ◽  
Elena S Naumova ◽  
Paul D Sniegowski
Keyword(s):  
Saccharomyces Cerevisiae ◽  
North American ◽  
Sensu Stricto ◽  
Biological Species ◽  
Saccharomyces Paradoxus ◽  
Saccharomyces Sensu Stricto ◽  
Ty Elements ◽  
Electrophoretic Karyotyping ◽  
Retrotransposable Element ◽  
First Time

Genetic hybridization and karyotypic analyses revealed the biological species Saccharomyces paradoxus and Saccharomyces cerevisiae in exudates from North American oaks for the first time. In addition, two strains collected from elm flux and from Drosophila by Phaff in 1961 and 1952 were reidentified as S. paradoxus. Each strain studied showed a unique profile of chromosomal hybridization with a probe for the retrotransposable element Ty1. The wild distribution of natural Saccharomyces sensu stricto yeasts is discussed.Key words: genetical taxonomy, Saccharomyces paradoxus, oak exudates, Ty elements, electrophoretic karyotyping.

Discrimination between two sibling species of Acroperus (Baird, 1843) from the Palearctic (Cladocera: Anomopoda: Chydoridae)

Zootaxa ◽  
2009 ◽  
Vol 2176 (1) ◽  
pp. 1-21 ◽  
Author(s):  
ARTEM Y. SINEV
Keyword(s):  
Differential Diagnosis ◽  
Intraspecific Variation ◽  
Sibling Species ◽  
Diagnostic Feature ◽  
The Family ◽  
Males And Females ◽  
Postembryonal Development ◽  
Body Shapes ◽  
First Time

Morphology and differential diagnosis of two common Eurasian but frequently confused Eurasian cladocerans, Acroperus harpae (Baird, 1834) and A. angustatus Sars, 1863, was investigated. Validity of both species is confirmed. A significant intraspecific variation in body shapes, unusual for species of the family Chydoridae, is present in females of both species. This “traditional” character is unreliable as diagnostic feature. Prominent differences between two species are revealed in antennal morphology, used for identification of all instars of males and females. Detailed morphology of males, postembryonal development of both males and females was studied in details for the first time. Our data suggest that two other European Acroperus taxa, A. neglectus Lilljeborg, 1900 and A. alonoides Hudendorff, 1876, are junior synonyms.

scholarly journals Draft Genome Sequence of the Pathogenic Filamentous Fungus Aspergillus lentulus IFM 54703 T

2016 ◽  
Vol 4 (1) ◽  
Author(s):  
Yoko Kusuya ◽  
Kanae Sakai ◽  
Katsuhiko Kamei ◽  
Hiroki Takahashi ◽  
Takashi Yaguchi
Keyword(s):  
Aspergillus Fumigatus ◽  
Genome Sequence ◽  
Causative Agent ◽  
Sibling Species ◽  
Filamentous Fungus ◽  
Draft Genome ◽  
Draft Genome Sequence ◽  
Aspergillus Lentulus ◽  
First Time

Aspergillus lentulus , a sibling species of Aspergillus fumigatus , has been reported as a causative agent of aspergillosis, and exhibited low susceptibility to azole. Here, we present the draft genome sequence of A. lentulus strain IFM 54703 T for the first time.

Description of the Macrocheles kraepelini species complex (Acari: Macrochelidae) with two new species

1986 ◽  
Vol 64 (1) ◽  
pp. 212-217 ◽  
Author(s):  
D. E. Walter ◽  
G. W. Krantz
Keyword(s):  
New Species ◽  
Body Size ◽  
Sibling Species ◽  
Species Complex ◽  
Species Group ◽  
Species Pair ◽  
Two New Species ◽  
Adult Body ◽  
First Time ◽  
Time Information

Mite predators of synanthropic flies similar to Macrocheles kraepelini (Berlese) are described as a new complex of species belonging to the Macrocheles glaber species group. Two new species in the kraepelini complex are described, M. tantalus and M. hallidayi. The male of M. kraepelini is described for the first time. Information on the distribution and phoretic associations of all three species is presented. Macrocheles hallidayi and M. kraepelini are sibling species, which, when sympatric, differ in adult body size by the same ratio as the holarctic sibling species pair of M. perglaber and M. glaber.

The identity of some specimens previously (mis)identified as Rhinoleucophenga obesa (Loew) (Diptera: Drosophilidae) in Brazil, based on morphological and molecular data, with implications on distribution

Zootaxa ◽  
2019 ◽  
Vol 4656 (2) ◽  
pp. 310-334
Author(s):  
JEAN LUCAS POPPE ◽  
MARCO SILVA GOTTSCHALK ◽  
MARÍNDIA DEPRÁ ◽  
HERMES JOSÉ SCHMITZ ◽  
VERA LÚCIA SILVA VALENTE
Keyword(s):  
Sibling Species ◽  
The United States ◽  
Molecular Data ◽  
Neotropical Region ◽  
Type Specimens ◽  
Widespread Species ◽  
Morphological Differences ◽  
Morphological And Molecular Data ◽  
First Time ◽  
Species Being

Rhinoleucophenga Hendel is an endemic genus of the New World with most species recorded in Brazil. Rhinoleucophenga obesa (Loew) seemed to be the most widespread species, being recorded in the United States of America, Mexico and Brazil. In the Neotropical region, identifications of R. obesa were commonly based on the description of non-type specimens determined by Costa Lima (1935) and Malogolowkin (1946), although their identities were doubtful. However, the recent redescription of R. obesa from the type-series from Texas, USA, confirmed a long period of misidentifications and a new species, R. cantareira Vilela & Bächli, was proposed based on Brazilian specimens. Thus, review of morphological and molecular traits of specimens previously identified as R. obesa in Neotropical biomes are necessary to check the identity and distribution of a group of sibling species: R. obesa, R. cantareira, R. gigantea (Thomson), R. pallida Hendel and R. pampeana Poppe et al. In the present paper, specimens previously determined as R. obesa, sampled in different Brazilian localities, were compared by morphological and molecular traits. Plates of female terminalia of R. cantareira and R. gigantea are presented for the first time. The spermathecal capsules (as well as the male epandrium) revealed useful characteristics to differentiate those species; these morphological differences were corroborated by a sequence fragment of COI. The specimens on which were based the descriptions of Rhinoleucophenga obesa sensu Costa Lima (1935) and sensu Malogolowkin (1946) were reviewed and confirmed as R. cantareira. Other Brazilian specimens from different localities, previously misidentified as R. obesa, were determined as R. gigantea or R. cantareira, with new records for both species. Therefore, the present study corresponds to the advance of identity definition and distribution of sibling species of Rhinoleucophenga commonly sampled in Neotropical inventory studies. 

Sibling species and sex chromosomes in Eusimulium vernum (Diptera: Simuliidae)

1985 ◽  
Vol 63 (9) ◽  
pp. 2145-2161 ◽  
Author(s):  
C. Brockhouse
Keyword(s):  
Sex Determination ◽  
Sibling Species ◽  
Sex Chromosomes ◽  
Polytene Chromosomes ◽  
Biological Species ◽  
Undescribed Species ◽  
Ecological Segregation ◽  
Sex Locus

The polytene chromosomes of larvae from samples of Eusimulium vernum, E. bicorne, and an undescribed species (designated here as Eusimulium "Yukon") were examined. Twelve cytotypes within E. vernum were distinguished, of which at least eight appear to be good biological species. These cytotypes, together with the two allied morphospecies, were related in a cytophylogeny. An ecological segregation between some of the siblings was observed. One cytotype apparently utilizes two (possibly three) separate chromosome (arms) in sex determination. Five of the total of six chromosome arms are involved in sex determination in the various members of this complex. The genetics of sex determination and the mechanisms of sex-locus shift are discussed in the context of these findings.

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.

Description of Tetrahymena empidokyrea n.sp., a new species in the Tetrahymena pyriformis sibling species complex (Ciliophora, Oligohymenophorea), and an assessment of its phylogenetic position using small-subunit rRNA sequences

1996 ◽  
Vol 74 (10) ◽  
pp. 1898-1906 ◽  
Author(s):  
Cheryl A. Jerome ◽  
Denis H. Lynn ◽  
Ellen M. Simon
Keyword(s):  
New Species ◽  
Sibling Species ◽  
Species Complex ◽  
Tetrahymena Pyriformis ◽  
Small Subunit ◽  
Biological Species ◽  
Phylogenetic Position ◽  
Small Subunit Rrna ◽  
A New Species ◽  
Rrna Sequences

Ciliates infected 0.25% of adult Aedes sp. mosquitoes collected in Guelph, Ontario. Morphological observations of live and stained specimens indicated that these ciliates belonged to the Tetrahymena pyriformis sibling species complex. This study provides the first well-documented case of insects being infected by a species in the T. pyriformis complex. Mating experiments demonstrated that these "mosquito" ciliates were reproductively isolated from previously described biological species in the complex, and are designated a new species, Tetrahymena empidokyrea n.sp. Phylogenetic analysis using SSrDNA sequences suggested that T. empidokyrea n.sp. is either basal to all species in the genus Tetrahymena or basal to one of the two main lineages in that genus.

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