Biological, ecological, morphological and cytogenetic analyses, with taxonomic notes of Zelurus ochripennis (Stål, 1854) (Hemiptera: Heteroptera: Reduviidae: Reduviinae)

The karyotype structure and banding patterns of the polytene chromosomes of Propsilocerus akamusi from China are investigated for the first time. Photographic maps of the three chromosomes of P. akamusi are presented. Three heterochromatic blocks in the centromere regions are characteristic of this species. Chromosomal polymorphisms were not found in the Chinese populations. Cytogenetic data support the phylogenetic argument previously outlined for the genus.

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Cytogenetic analyses in Trinomys (Echimyidae, Rodentia), with description of new karyotypes

PeerJ ◽

10.7717/peerj.5316 ◽

2018 ◽

Vol 6 ◽

pp. e5316 ◽

Cited By ~ 1

Author(s):

Naiara Pereira Araújo ◽

Cayo Augusto Rocha Dias ◽

Rodolfo Stumpp ◽

Marta Svartman

Keyword(s):

Chromosome Mapping ◽

Nucleolar Organizer ◽

Interspecific Variation ◽

Nucleolar Organizer Regions ◽

45S Rdna ◽

Banding Patterns ◽

Pericentric Inversions ◽

Cytogenetic Analyses ◽

First Time

Trinomys Thomas (1921) is a terrestrial genus of spiny rats endemic to the Brazilian areas of Atlantic Forest and the transitional areas of Cerrado and Caatinga. Although most species have been already karyotyped, the available cytogenetic information is mostly restricted to diploid and fundamental numbers. We analyzed the chromosomes of two Trinomys species: Trinomys moojeni (2n = 56, FN = 106) and Trinomys setosus setosus (2n = 56, FN = 106 and 2n = 56, FN = 108). Our analyses included GTG- and CBG-banding, silver-staining of the nucleolar organizer regions, and chromosome mapping of telomeres and 45S rDNA by fluorescent in situ hybridization (FISH). Comparative GTG- and CBG-banding suggested that the interspecific variation may be due to rearrangements such as pericentric inversions, centromere repositioning, and heterochromatin variation. We report two new karyotypes for T. s. setosus and describe for the first time the banding patterns of the two Trinomys species.

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First illustration of chromosomes and genetic system of Lecanodiaspidinae (Homoptera, Coccinea, Asterolecaniidae s.l.)

Comparative Cytogenetics ◽

10.3897/compcytogen.v12i3.29648 ◽

2018 ◽

Vol 12 (3) ◽

pp. 439-443 ◽

Cited By ~ 2

Author(s):

Ilya A. Gavrilov-Zimin

Keyword(s):

Chromosome Number ◽

Genetic System ◽

B Chromosomes ◽

Scale Insects ◽

Diploid Chromosome Number ◽

Embryonic Cells ◽

Paternal Genome ◽

Cytogenetic Data ◽

Males And Females ◽

First Time

The karyotype of Psoraleococcusmultipori (Morrison, 1921) was studied for the first time, based on material from Indonesia (Sulawesi). The diploid chromosome number was found to be 18 in both males and females, but some cells contained also additional small chromosomal elements, probably B chromosomes. About 50 % of the studied embryos demonstrated paternal genome heterochromatinization of one haploid set of chromosomes (PGH) suggesting presence of a Lecanoid genetic system. The embryos with PGH are known to be always the male embryos in scale insects and so, bisexual reproduction may be presumed for P.multipori. The information provided represents the first probative cytogenetic data for the subfamily Lecanodiaspidinae Targioni Tozzetti, 1896 as a whole. A detailed morphological figure and photos of female and male embryonic cells are given. Additionally, it was discovered that the females of P.multipori exhibit complete ovoviviparity.

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16.—The Sensory Fields and Life Mode of Phacops rana (Green, 1832) (Trilobita)

Earth and Environmental Science Transactions of the Royal Society of Edinburgh ◽

10.1017/s0080456800015350 ◽

1976 ◽

Vol 69 (16) ◽

pp. 337-367 ◽

Cited By ~ 25

Author(s):

John Miller

Keyword(s):

Adaptive Radiation ◽

Sensory Function ◽

Distinctive Pattern ◽

General Morphology ◽

Freedom Of Movement ◽

Life Mode ◽

Sensory Structures ◽

Lateral Branches ◽

Surface Examination ◽

First Time

SynopsisVarious types of trilobite exoskeletal sculpture are described and referred to a simple classification. Thin-section and surface examination of many such sculptural features shows them to be remnants of distinct cuticular organelles, which probably had a sensory function. The supposed sensory structures of well-preserved specimens of Phacops rana (Green) are described in detail and their presumed specific functions considered. Mapping sensilla distribution over the Phacops rana dorsal exoskeleton shows a distinctive pattern conveniently divisible into nine inferred sensory fields with the densest sensory concentrations on the head and margins of the dorsal shield.Conclusions on the importance of these sensory fields in mediating the trilobite's behaviour are combined with evidence from general morphology, palaeocology and evolutionary trends to suggest that Phacops rana was an active benthonic animal with a dual trophic capability lending considerable flexibility in adaptive radiation.The P. rana hypostomal suture, consisting of two short coplanar lateral branches, is described for the first time, indicating that the hypostoma had considerable freedom of movement, possibly connected with ingestion of bulky food.

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Cytogenetic data for sixteen ant species from North-eastern Amazonia with phylogenetic insights into three subfamilies

Comparative Cytogenetics ◽

10.3897/compcytogen.v14i1.46692 ◽

2020 ◽

Vol 14 (1) ◽

pp. 43-60

Author(s):

Hilton Jeferson Alves Cardoso de Aguiar ◽

Luísa Antônia Campos Barros ◽

Linda Inês Silveira ◽

Frédéric Petitclerc ◽

Sandrine Etienne ◽

...

Keyword(s):

Terrestrial Ecosystems ◽

Molecular Data ◽

South American ◽

Atta Sexdens ◽

Leafcutter Ants ◽

Cytogenetic Data ◽

North Eastern ◽

Karyotype Structure ◽

Morphological And Molecular Data ◽

First Time

Ants play essential roles in most terrestrial ecosystems and may be considered pests for agriculture and agroforestry. Recent morphological and molecular data have challenged conventional ant phylogeny and the interpretation of karyotypic variations. Existing Neotropical ant cytogenetic data focus on Atlantic rainforest species, and provide evolutionary and taxonomic insight. However, there are data for only 18 Amazonian species. In this study, we describe the karyotypes of 16 ant species belonging to 12 genera and three subfamilies, collected in the Brazilian state of Amapá, and in French Guiana. The karyotypes of six species are described for the first time, including that of the South American genus Allomerus Mayr, 1878. The karyotype of Crematogaster Lund, 1831 is also described for the first time for the New World. For other species, extant data for geographically distinct populations was compared with our own data, e.g. for the leafcutter ants Acromyrmex balzani (Emery, 1890) and Atta sexdens (Linnaeus, 1758). The information obtained for the karyotype of Dolichoderus imitator Emery, 1894 differs from extant data from the Atlantic forest, thereby highlighting the importance of population cytogenetic approaches. This study also emphasizes the need for good chromosome preparations for studying karyotype structure.

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New cytogenetic data for three species of Pentatomidae (Heteroptera): Dichelops melacanthus (Dallas, 1851), Loxa viridis (Palisot de Beauvois, 1805), and Edessa collaris (Dallas, 1851)

Comparative Cytogenetics ◽

10.3897/compcytogen.v14i4.56743 ◽

2020 ◽

Vol 14 (4) ◽

pp. 577-588

Author(s):

Jaqueline Fernanda Dionísio ◽

Joana Neres da Cruz Baldissera ◽

Angélica Nunes Tiepo ◽

José Antônio Marin Fernandes ◽

Daniel Ricardo Sosa-Gómez ◽

...

Keyword(s):

Sex Chromosomes ◽

18S Rdna ◽

Holocentric Chromosomes ◽

Meiotic Behavior ◽

Rdna Probe ◽

C Banding ◽

Cytogenetic Data ◽

The Family ◽

First Time

In this paper, we present new cytogenetic data for three species of the family Pentatomidae: Dichelops melacanthus (Dallas, 1851), Loxa viridis (Palisot de Beauvois, 1805), and Edessa collaris (Dallas, 1851). All studied species presented holocentric chromosomes and inverted meiosis for the sex chromosomes. D. melacanthus has 2n = 12 (10A + XY); L. viridis showed 2n = 14 (12A + XY); and E. collaris showed 2n = 14 (12A + XY). C-banding was performed for the first time in these species and revealed terminal and interstitial heterochromatic regions on the autosomes; DAPI/CMA3 staining showed different fluorescent patterns. In all species, fluorescence in situ hybridization (FISH) with 18S rDNA probe identified signals on one autosomal bivalent, this being the first report of FISH application in the species D. melacanthus and L. viridis. The results obtained add to those already existing in the literature, enabling a better understanding of the meiotic behavior of these insects.

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New cytogenetic data for three species of Pentatomidae (Heteroptera): Dichelops melacanthus (Dallas, 1851), Loxa viridis (Palisot de Beauvois, 1805), and Edessa collaris (Dallas, 1851)

Comparative Cytogenetics ◽

10.3897/compcytogen.v14.i4.56743 ◽

2020 ◽

Vol 14 (4) ◽

pp. 577-588

Author(s):

Jaqueline Fernanda Dionísio ◽

Joana Neres da Cruz Baldissera ◽

Angélica Nunes Tiepo ◽

José Antônio Marin Fernandes ◽

Daniel Ricardo Sosa-Gómez ◽

...

Keyword(s):

Sex Chromosomes ◽

18S Rdna ◽

Holocentric Chromosomes ◽

Meiotic Behavior ◽

Rdna Probe ◽

C Banding ◽

Cytogenetic Data ◽

The Family ◽

First Time

In this paper, we present new cytogenetic data for three species of the family Pentatomidae: Dichelops melacanthus (Dallas, 1851), Loxa viridis (Palisot de Beauvois, 1805), and Edessa collaris (Dallas, 1851). All studied species presented holocentric chromosomes and inverted meiosis for the sex chromosomes. D. melacanthus has 2n = 12 (10A + XY); L. viridis showed 2n = 14 (12A + XY); and E. collaris showed 2n = 14 (12A + XY). C-banding was performed for the first time in these species and revealed terminal and interstitial heterochromatic regions on the autosomes; DAPI/CMA3 staining showed different fluorescent patterns. In all species, fluorescence in situ hybridization (FISH) with 18S rDNA probe identified signals on one autosomal bivalent, this being the first report of FISH application in the species D. melacanthus and L. viridis. The results obtained add to those already existing in the literature, enabling a better understanding of the meiotic behavior of these insects.

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Towards a Classification of the African Acacias

Bothalia ◽

10.4102/abc.v11i1/2.1982 ◽

1973 ◽

Vol 11 (1/2) ◽

pp. 107-113 ◽

Cited By ~ 4

Author(s):

J. H. Ross

Keyword(s):

Recent Work ◽

Pollen Morphology ◽

African Species ◽

Seedling Morphology ◽

General Morphology ◽

First Time

Some of the first attempts to subdivide the genus Acacia Mill, as a whole are discussed briefly. Bentham’s work, in which the subdivisions of the genus were for the first time given names, is considered and his two series into which the African species fall are reproduced. The characters employed by various workers to divide the African species into two main groups are mentioned and the advantages of using each of these characters for the first dichotomy in a key are discussed. Recent work on pollen morphology and seedling morphology is correlated with general morphology. A proposal put forward by Guinet to divide Acacia into three large genera on the basis of pollen morphology is briefly discussed. Certain modifications to Bentham's series Vulgares and Gummiferae are suggested.

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CYTOGENETICS OF CHILEAN FISHES: A COMMENTED DATABASE

BIOCYT Biología Ciencia y Tecnología ◽

10.22201/fesi.20072082.2011.4.75960 ◽

2020 ◽

Vol 4 (13-16) ◽

Cited By ~ 1

Author(s):

Pedro Jara-Seguel ◽

Gladys Lara ◽

María Paz García ◽

Iván Valdebenito

Keyword(s):

Chromosome Number ◽

Genome Size ◽

Fish Species ◽

Dna Sequences ◽

Fish Diversity ◽

Cytogenetic Data ◽

Cytogenetic Studies ◽

Karyotype Morphology ◽

First Time ◽

Cytogenetic Methods

A database containing data from cytogenetic studies of Chilean fish species is documented for the first time. The cytogenetic data compiled for Chilean fishes include 28 species belonging to 11 families, 9 orders and 16 genera, taking as reference 18 publications since 1972. The application of a variety of cytogenetic methods has provided information on chromosome number, karyotype morphology, genome size, and /or location of different DNA sequences. These data represent only ca. 2.7% of Chile’s fish diversity.

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Karyotypic data and attendant systematic implications for the bats of southern Africa

Koedoe ◽

10.4102/koedoe.v36i2.377 ◽

1993 ◽

Vol 36 (2) ◽

Cited By ~ 25

Author(s):

I.L. Rautenbach ◽

G.N. Bronner ◽

D.A. Schlitter

Keyword(s):

Southern Africa ◽

Molecular Data ◽

Generic Rank ◽

Cytogenetic Data ◽

Karyotypic Variation ◽

First Time

The standard karyotypic properties of 60 of the 73 species of bats known to occur in southern Africa, are reviewed. The karyotypes of 23 microchiropteran species are described for the first time; our results on a further 14 species are compared with earlier reports for those taxa. The previously published chromosomal information pertaining to 23 species for which we had no information, are cited. Systematic implications of observed patterns of karyotypic variation are briefly discussed. In particular, we conclude that the taxon Cistugo (currently recognised as a subgenus oiMyotis) should be afforded full generic rank; hypothesise that the karyotypes of the two species - M. (C.) seabrai and M. (C.) lesueuri - in Cistugo are probably ancestral for all vespertilionids; and question the wisdom of redefining the taxonomic limits of the genera Eptesicus and Pipistrellus until molecular data are available to resolve the dilemma posed by conflicting morphological and cytogenetic data suites.

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