A taxonomic review of the Palaearctic Tetramorium ferox species-complex (Hymenoptera, Formicidae)

Zootaxa ◽  
2010 ◽  
Vol 2401 (1) ◽  
pp. 1 ◽  
Author(s):  
SÁNDOR CSŐSZ ◽  
ANDREAS SCHULZ
Keyword(s):  
High Precision ◽  
Species Complex ◽  
External Morphology ◽  
Taxonomic Review ◽  
Definition Of

This revision treats the members of the Palaearctic Tetramorium ferox species-complex on the basis of external morphology and using high precision morphometrics. With this approach we recognize five taxa and six synonyms: Tetramorium aegeum Radchenko, 1992b; Tetramorium densopilosum Radchenko & Arakelian, 1990; Tetramorium diomedeum Emery, 1908; Tetramorium ferox Ruzsky, 1903; and Tetramorium feroxoide Dlussky & Zabelin, 1985. Tetramorium laevior Menozzi, 1936 is synonymized with Tetramorium diomedeum. Tetramorium confinis Radchenko & Arakelian, 1990, Tetramorium perspicax Radchenko, 1992b, and Tetramorium ferox subsp. silhavyi Kratochvil, 1941 are synonymized with Tetramorium ferox. Tetramorium bursakovi Radchenko, 1992a is synonymized with Tetramorium feroxoide. A key and redescriptions for workers and gynes are given. SEM photos for workers and gynes of each species are provided. A morphology-based definition of the species complex for workers, gynes and males is also provided.

scholarly journals Solar barycentric dynamics from a new solar-planetary ephemeris

2018 ◽  
Vol 615 ◽  
pp. A153 ◽  
Author(s):  
Rodolfo G. Cionco ◽  
Dmitry A. Pavlov
Keyword(s):  
High Precision ◽  
Orbital Motion ◽  
Giant Planets ◽  
Reference Plane ◽  
The Sun ◽  
The Future ◽  
Dynamical Parameters ◽  
Definition Of ◽  
Invariable Plane ◽  
Planetary Theories

Aims. The barycentric dynamics of the Sun has increasingly been attracting the attention of researchers from several fields, due to the idea that interactions between the Sun’s orbital motion and solar internal functioning could be possible. Existing high-precision ephemerides that have been used for that purpose do not include the effects of trans-Neptunian bodies, which cause a significant offset in the definition of the solar system’s barycentre. In addition, the majority of the dynamical parameters of the solar barycentric orbit are not routinely calculated according to these ephemerides or are not publicly available. Methods. We developed a special version of the IAA RAS lunar–solar–planetary ephemerides, EPM2017H, to cover the whole Holocene and 1 kyr into the future. We studied the basic and derived (e.g., orbital torque) barycentric dynamical quantities of the Sun for that time span. A harmonic analysis (which involves an application of VSOP2013 and TOP2013 planetary theories) was performed on these parameters to obtain a physics-based interpretation of the main periodicities present in the solar barycentric movement. Results. We present a high-precision solar barycentric orbit and derived dynamical parameters (using the solar system’s invariable plane as the reference plane), widely accessible for the whole Holocene and 1 kyr in the future. Several particularities and barycentric phenomena are presented and explained on dynamical bases. A comparison with the Jet Propulsion Laboratory DE431 ephemeris, whose main differences arise from the modelling of trans-Neptunian bodies, shows significant discrepancies in several parameters (i.e., not only limited to angular elements) related to the solar barycentric dynamics. In addition, we identify the main periodicities of the Sun’s barycentric movement and the main giant planets perturbations related to them.

Taxonomic Review of Eumenes Latreille, 1802 (Hymenoptera, Vespidae, Eumeninae) from the New World

Zootaxa ◽  
2018 ◽  
Vol 4459 (1) ◽  
pp. 1
Author(s):  
YURI CAMPANHOLO GRANDINETE ◽  
FERNANDO BARBOSA NOLL ◽  
JAMES CARPENTER
Keyword(s):  
Male Genitalia ◽  
New World ◽  
Identification Key ◽  
External Morphology ◽  
Specific Level ◽  
Taxonomic Review ◽  
New Name ◽  
New Synonymy

The genus Eumenes Latreille, 1802, from the New World, is revised based on external morphology and male genitalia. New synonymy is proposed as follows: E. aureus Isely, 1917 = E. americanus de Saussure, 1852; E. bollii oregonensis Bequaert, 1838, and E. b. ehrenbergi Zavattari, 1912 = E. bollii Cresson, 1872; E. consobrinus pedalis Fox, 1894 = E. consobrinus de Saussure, 1855; E. crucifera bolliformis Viereck, 1908, E. c. nearcticus de Saussure, 1855 and E. c. stricklandi Bequaert, 1944 = E. crucifera Provancher, 1888; E. smithii belfragei Cresson, 1872 = E. smithii de Saussure, 1852; E. verticalis coloradensis Cresson, 1875, E. v. neoboreus Bequaert, 1944, E. v. tricinctus Isely, 1917 = E. verticalis Say, 1824. Eumenes flavitinctus Bohart, 1950, revised status, is no longer a subspecies of E. crucifera but elevated to specific level. Eumenes brunneus is elevated to the specific level and a new name is proposed because of homonymy, E. bequaerti Grandinete & Carpenter nom. nov. An identification key for all the species of the genus from the New World is provided and the geographical distributions are updated. 

Definition of Lepidocyrtus lusitanicus Gama, 1964 species-complex (Collembola, Entomobryidae), with description of new species and color forms from the Iberian Peninsula

Zootaxa ◽  
2008 ◽  
Vol 1917 (1) ◽  
pp. 38-54 ◽  
Author(s):  
EDUARDO MATEOS
Keyword(s):  
New Species ◽  
Iberian Peninsula ◽  
Geographical Distribution ◽  
Species Complex ◽  
Color Pattern ◽  
Color Variation ◽  
Body Color ◽  
High Similarity ◽  
Definition Of ◽  
Pattern Variability

Lepidocyrtus lusitanicus is one of the species with greater color pattern variability within the genus Lepidocyrtus. Four subspecies have been described in relation to its body color variation. The study of various populations of Lepidocyrtus from the Iberian Peninsula has allowed me to describe the new chromatic form L. lusitanicus form A, as well as the new species L. bilobatus, which is very closely related to L. lusitanicus, and also shows high color pattern variability. The high similarity among species L. lusitanicus, L. selvaticus and L. bilobatus sp. nov., the high color pattern variability of their populations, the overlapping geographical distribution of many studied populations, and the presence of three dorsal macrochaetae between trichobothria m2 and a5 of the second abdominal tergum, led me to define the group Lepidocyrtus lusitanicus species-complex. This group included the three abovementioned species with all of their color forms.

Impact of high precision gravimetry in the context of a future new SI

2014 ◽  
Vol 30 ◽  
pp. 1460270
Author(s):  
Henri Baumann ◽  
Ali L. Eichenberger
Keyword(s):  
High Precision ◽  
Laser Interferometer ◽  
Mass Unit ◽  
Research Areas ◽  
Gravity Measurements ◽  
Definition Of ◽  
New Research ◽  
New Si ◽  
The Doors

In the early eighties, the development of ballistic absolute gravimeters based on laser interferometer opened the doors to new research areas in various scientific domains such as geodesy, geophysics or metrology. After a brief overview of the most used technique for gravity measurements, the implication of gravity in the context of an improved SI, especially for a new definition of the mass unit kg, will be presented.

THE APPLICATION OF 3D SEISMIC INTERPRETATION TECHNIQUES FOR OPTIMISING WELL PLACEMENT: FORTESCUE FIELD RE DEVELOPMENT, GIPPSLAND BASIN

1997 ◽  
Vol 37 (1) ◽  
pp. 31
Author(s):  
P.J. Ryan ◽  
T.E. Vinson
Keyword(s):  
High Precision ◽  
Seismic Data ◽  
Development Program ◽  
Seismic Interpretation ◽  
3D Seismic ◽  
Well Placement ◽  
Seismic Waveform ◽  
Attribute Analysis ◽  
Definition Of ◽  
Gippsland Basin

In order to achieve successful drilling results on mature fields, geophysical analysis has become increasingly focussed on the application of high precision 3D seismic interpretation and analysis techniques. These techniques were critical to the success of the re-development program recently completed on the Fortescue Field* Gippsland Basin. Fortescue, initially developed in 1983, contains an estimated oil reserve of 300 million barrels. The field is currently over 80 percent depleted. To offset declining production and develop remaining reserves, an 18 well additional drilling program together with upgrades to platform topsides and production facilities was conducted on the field from October 1994 to October 1996.Many of the proposed additional drilling opportunities relied on oil being trapped structurally updip from existing completions. Given the size (approx. 1 MSTB) and subtle, low relief nature of the targets being pursued, the precision of conventional 3D seismic interpretation techniques was inadequate to optimise the location of wells. This necessitated the development of a series of specific tools that could provide high resolution definition of both the trap and lithology as well as optimising well placement.These high precision interpretation techniques include: reservoir subcrop edge prediction through qualitative calibration of geological models to seismic data: the assessment of overburden velocity distortions of the seismic time field by utilising isochron mapping and interval attribute analysis; and prediction of trap geometries and lateral stratigraphic variations by the application of seismic waveform attributes.The application of these advanced 3D seismic interpretation techniques and their integration with related geoscience and engineering technologies resulted in the completion of a successful 18 well re-development program for the Fortescue field.

Способ обработки результатов магнитной дефектоскопии для достоверного обнаружения опасных дефектов сплошности в реальном времени

2020 ◽  
pp. 58-64
Author(s):  
А.Н. Печенков
Keyword(s):  
Magnetic Field ◽  
Inverse Problem ◽  
Inverse Problems ◽  
Computer Program ◽  
Real Time ◽  
High Precision ◽  
Computational Method ◽  
On Line ◽  
Definition Of ◽  
Minimization Of Functional

The inverse problems of magnetostatics for defects of a continuum can be formulated in various ways. It is possible to set a task of definition of defects with high precision and permission,or it is possible to limit the task to detection of several types of defects («dangerous» defects) with good probability. At the same time «small» defects will be passed by the computer program. The problem of minimization of functional for both experimental and computational magnetic field differences is the main problem for the solution of any inverse problem, both in on – line (real time), and in off - line modes. Computational method of calculations in real time of the simplified inverse problem, without accumulation of experimental databases is considered.

Sign in / Sign up

Export Citation Format

Share Document