Pipunculidae (Diptera) from Australia: the genera Cephalops Fallén and Beckerias Aczél

1992 ◽  
Vol 6 (1) ◽  
pp. 143 ◽  
Author(s):  
MDe Meyer ◽  
P Grootaert
Keyword(s):  
Phylogenetic Relationship ◽  
Relationship Of ◽  
The Relationship

Pipunculid representatives of the genera Cephalops and Beckerias in Australia are revised. Eight species, of which six (Cephalops ariadneae, sp. nov., C. caeruleimontanus, sp. nov., C. cochleatus, sp. nov., C. flaviventris, sp. nov., C. robustus, sp. nov., and C. terraereginensis, sp. nov.) are new to science, are recognised. Three species, formerly placed under Cephalops, are placed in new generic combinations: Microcephalops anthracias (Perkins), M. homoeophanes (Perkins) and M. microdes (Perkins). The relationship of the Australian fauna with other adjacent faunas is discussed, and the phylogenetic relationship of the species is reviewed. A key for the Australian Cephalops and Beckerias species is provided.

scholarly journals Fungicide Sensitivity and Phylogenetic Relationship of Anthracnose Fungi Isolated from Various Fruit Crops in Japan

Plant Disease ◽  
2006 ◽  
Vol 90 (4) ◽  
pp. 506-512 ◽  
Author(s):  
Wen-Hsin Chung ◽  
Hideo Ishii ◽  
Kumiko Nishimura ◽  
Masako Fukaya ◽  
Kazutaka Yano ◽  
...  
Keyword(s):  
Phylogenetic Relationship ◽  
Colletotrichum Gloeosporioides ◽  
Phylogenetic Analyses ◽  
Interspecific Variation ◽  
Fruit Crops ◽  
Fungicide Sensitivity ◽  
Genetic Groups ◽  
Molecular Phylogenetic ◽  
Relationship Of ◽  
The Relationship

Anthracnose diseases of fruit crops are mainly caused by Colletotrichum gloeosporioides and C. acutatum. In these Colletotrichum species, intra- and interspecific variation in fungicide sensitivity has been reported; however, the relationship between fungicide sensitivity and molecular phylogeny has not been analyzed. Fifty-one isolates from 10 fruit crops, acacia, and tea were tested for their sensitivities to thiophanate-methyl, diethofencarb, and iminoctadine-triacetate, and their internal transcribed spacer (ITS) and 5.8S regions of rDNA were analyzed. C. gloeosporioides isolates were divided into sensitive, less sensitive, intermediate resistant, or resistant to the three fungicides. In contrast, C. acutatum isolates were all less sensitive. In molecular phylogenetic analyses, C. gloeosporioides isolates fell into the same genetic group, whereas C. acutatum isolates were placed into two genetic groups. Although phylogenetic relationship was not closely related to fungicide sensitivity, the isolates of C. gloeosporioides most resistant to iminoctadine-triacetate were found in the same phylogenetic subgroup.

The Karyotype of the Hoatzin (Opisthocomus hoazin) - A Phylogenetic Enigma of the Neornithes

2018 ◽  
Vol 156 (3) ◽  
pp. 158-164 ◽  
Author(s):  
Michelly S. dos Santos ◽  
Ivanete O. Furo ◽  
Marcella M. Tagliarini ◽  
Rafael Kretschmer ◽  
Patricia C.M. O''Brien ◽  
...  
Keyword(s):  
Phylogenetic Relationship ◽  
18S Rdna ◽  
Phylogenetic Analyses ◽  
Phylogenetic Position ◽  
Ancestral Karyotype ◽  
Foregut Fermentation ◽  
Relationship Of ◽  
The Relationship ◽  
Amazonian Region

The hoatzin (Opisthocomus hoazin Müller, 1776) is a folivorous bird, endemic to the Amazonian region. It presents some unique characteristics, including wing claws and foregut fermentation, which make its phylogenetic relationship to other birds difficult to determine. There have been various attempts to place it among the Galliformes, Gruiformes, Musophagiformes, Cuculiformes, and Charadriiformes, but phylogenetic analyses always show low supporting values. Nowadays, the hoatzin is included in the monotypic order Opisthocomiformes, but the relationship of this order to other groups of birds is still unclear. Although its karyotype resembles the typical avian model, fissions of the syntenic groups corresponding to chicken chromosomes 1 and 2 and 2 fusions were found. The presence of 18S rDNA clusters in 2 pairs of microchromosomes is another derived character. Hence, different rearrangements were detected in the karyotype of the hoatzin, indicating it has been derived from the putative ancestral karyotype by the occurrence of fissions and fusions. However, as these rearrangements are not exclusive to O. hoazin, they do not clarify the phylogenetic position of this enigmatic species.

Phylogenetic relationship of Parmelia lindmanii (Parmeliaceae) inferred by analysis of its nuITS rDNA sequence

2010 ◽  
Vol 42 (4) ◽  
pp. 423-428 ◽  
Author(s):  
Sionara ELIASARO ◽  
Leonardo M. CRUZ ◽  
Marcello IACOMINI ◽  
Fabio de OLIVEIRA PEDROSA ◽  
Lucimara M. C. CORDEIRO
Keyword(s):  
Phylogenetic Relationship ◽  
Ribosomal Dna ◽  
Bayesian Approach ◽  
Type Species ◽  
Rdna Sequence ◽  
Phylogenetic Study ◽  
Nuclear Its ◽  
Relationship Of ◽  
The Relationship

AbstractUsing the nuclear ITS (nuITS) region of the ribosomal DNA and an MP/Bayesian approach, a phylogenetic study was carried out to evaluate the relationship of Parmelia lindmanii with other members of the parmelioid lichen group. Our results showed that P. lindmanii does not belong to the genus Myelochroa, as previously proposed, but is within the clade containing the type species of Parmelinella.

scholarly journals DNA barcoding to resolve phylogenetic relationship in Myristica spp.

1970 ◽  
pp. 131-140
Author(s):  
V P Swetha ◽  
T E Sheeja ◽  
B Sasikumar
Keyword(s):  
Dna Barcoding ◽  
Phylogenetic Relationship ◽  
Evolutionary Relationship ◽  
Relationship Of ◽  
The Relationship

Myristica is the largest and primitive genus of the taxonomically complex family Myristicaceae. DNA barcoding was used to study the evolutionary relationship between Myristica spp. and other genera of Myristicaceae. The barcoding loci namely, rbcL, matK, psbA-trnH, ITS and multilocus combinations were tested to assess their phylogenetic relationship. psbA-trnH locus revealed information regarding the relationship of species in Myristica genus. M. fragrans was found to be closely related to M. beddomei, M. amygdalina, M. andamanica1, whereas M. Fatua was found to be distinct from M. malabarica. Gymnocranthera and Knema species were found to share sister relation with other Myristica spp.

The relationship of the scleractinian corals to the rugose corals

Paleobiology ◽  
1980 ◽  
Vol 6 (02) ◽  
pp. 146-160 ◽  
Author(s):  
William A. Oliver
Keyword(s):  
Critical Points ◽  
Scleractinian Corals ◽  
Convincing Evidence ◽  
Early Triassic ◽  
Rugose Corals ◽  
History Of ◽  
The Subject ◽  
Relationship Of ◽  
The Relationship ◽  
Biologic Factors

The Mesozoic-Cenozoic coral Order Scleractinia has been suggested to have originated or evolved (1) by direct descent from the Paleozoic Order Rugosa or (2) by the development of a skeleton in members of one of the anemone groups that probably have existed throughout Phanerozoic time. In spite of much work on the subject, advocates of the direct descent hypothesis have failed to find convincing evidence of this relationship. Critical points are:(1) Rugosan septal insertion is serial; Scleractinian insertion is cyclic; no intermediate stages have been demonstrated. Apparent intermediates are Scleractinia having bilateral cyclic insertion or teratological Rugosa.(2) There is convincing evidence that the skeletons of many Rugosa were calcitic and none are known to be or to have been aragonitic. In contrast, the skeletons of all living Scleractinia are aragonitic and there is evidence that fossil Scleractinia were aragonitic also. The mineralogic difference is almost certainly due to intrinsic biologic factors.(3) No early Triassic corals of either group are known. This fact is not compelling (by itself) but is important in connection with points 1 and 2, because, given direct descent, both changes took place during this only stage in the history of the two groups in which there are no known corals.

Skeletal elements of crinoid echinoderms: High-resolution structural and microanalytical results

1983 ◽  
Vol 41 ◽  
pp. 194-195
Author(s):  
D. F. Blake ◽  
L. F. Allard ◽  
D. R. Peacor
Keyword(s):  
High Resolution ◽  
Marine Invertebrates ◽  
Sea Urchins ◽  
Structural Features ◽  
Sea Stars ◽  
High Resolution Tem ◽  
Relationship Of ◽  
The Relationship ◽  
Insight Into

Echinodermata is a phylum of marine invertebrates which has been extant since Cambrian time (c.a. 500 m.y. before the present). Modern examples of echinoderms include sea urchins, sea stars, and sea lilies (crinoids). The endoskeletons of echinoderms are composed of plates or ossicles (Fig. 1) which are with few exceptions, porous, single crystals of high-magnesian calcite. Despite their single crystal nature, fracture surfaces do not exhibit the near-perfect {10.4} cleavage characteristic of inorganic calcite. This paradoxical mix of biogenic and inorganic features has prompted much recent work on echinoderm skeletal crystallography. Furthermore, fossil echinoderm hard parts comprise a volumetrically significant portion of some marine limestones sequences. The ultrastructural and microchemical characterization of modern skeletal material should lend insight into: 1). The nature of the biogenic processes involved, for example, the relationship of Mg heterogeneity to morphological and structural features in modern echinoderm material, and 2). The nature of the diagenetic changes undergone by their ancient, fossilized counterparts. In this study, high resolution TEM (HRTEM), high voltage TEM (HVTEM), and STEM microanalysis are used to characterize tha ultrastructural and microchemical composition of skeletal elements of the modern crinoid Neocrinus blakei.

Studies on Leukemogenic and Sarcomagenic Viruses

1970 ◽  
Vol 28 ◽  
pp. 156-157
Author(s):  
Leon Dmochowski
Keyword(s):  
Electron Microscopy ◽  
Electron Microscope ◽  
Morphological Properties ◽  
Mode Of Development ◽  
Relationship Of ◽  
The Relationship

Electron microscopy has proved to be an invaluable discipline in studies on the relationship of viruses to the origin of leukemia, sarcoma, and other types of tumors in animals and man. The successful cell-free transmission of leukemia and sarcoma in mice, rats, hamsters, and cats, interpreted as due to a virus or viruses, was proved to be due to a virus on the basis of electron microscope studies. These studies demonstrated that all the types of neoplasia in animals of the species examined are produced by a virus of certain characteristic morphological properties similar, if not identical, in the mode of development in all types of neoplasia in animals, as shown in Fig. 1.

The relationship of IGE receptor topography to signaling activity in RBL-2H3 mast cells

1991 ◽  
Vol 49 ◽  
pp. 236-237
Author(s):  
J.R. Pfeiffer ◽  
J.C. Seagrave ◽  
C. Wofsy ◽  
J.M. Oliver
Keyword(s):  
Mast Cells ◽  
Protein A ◽  
Scattered Electron ◽  
Ige Receptor ◽  
Receptor Complexes ◽  
Ige Binding ◽  
Electron Imaging ◽  
Small Clusters ◽  
Relationship Of ◽  
The Relationship

In RBL-2H3 rat leukemic mast cells, crosslinking IgE-receptor complexes with anti-IgE antibody leads to degranulation. Receptor crosslinking also stimulates the redistribution of receptors on the cell surface, a process that can be observed by labeling the anti-IgE with 15 nm protein A-gold particles as described in Stump et al. (1989), followed by back-scattered electron imaging (BEI) in the scanning electron microscope. We report that anti-IgE binding stimulates the redistribution of IgE-receptor complexes at 37“C from a dispersed topography (singlets and doublets; S/D) to distributions dominated sequentially by short chains, small clusters and large aggregates of crosslinked receptors. These patterns can be observed (Figure 1), quantified (Figure 2) and analyzed statistically. Cells incubated with 1 μg/ml anti-IgE, a concentration that stimulates maximum net secretion, redistribute receptors as far as chains and small clusters during a 15 min incubation period. At 3 and 10 μg/ml anti-IgE, net secretion is reduced and the majority of receptors redistribute rapidly into clusters and large aggregates.

Sign in / Sign up

Export Citation Format

Share Document