Studies in African Tachinidae (Diptera).—II

1927 ◽  
Vol 18 (2) ◽  
pp. 103-128 ◽  
Author(s):  
C. H. Curran
Keyword(s):  
New Species ◽  
Considerable Progress ◽  
Number Of Species ◽  
Sufficient Detail ◽  
Near Future ◽  
Made In

In several previously published papers dealing with African Diptera I have described a number of species belonging to the genus Sturmia, Desvoidy, but up to the present time have not had sufficient material available to warrant the preparation of a key to the species, nor have I had an opportunity of studying the species in sufficient detail to decide upon characters of value in their classification. However, since many species were reared and it was desirable to have names for them in order that they might be used in reports by various Entomologists in Africa, a number of the species were described, and it has since been possible to make considerable progress in the study of the whole. As a result a key to the species belonging to this genus is now presented, and it is hoped that it will be of assistance in identifying the representatives of this difficult group.It is further hoped that arrangements may be made in the near future for the publication of a key to the genera of the Tachinidae, since it is obvious that with the very large number of genera described, the description of an additional genus, or even of new species in old genera, conveys little of the true relationships of the forms described and merely adds to the difficulty of making determinations.

Caddisflies (Insecta: Trichoptera) from Maranhão State, Northeast Region, Brazil: A new species, checklist, and new geographical records

Zootaxa ◽  
2017 ◽  
Vol 4221 (2) ◽  
pp. 151 ◽  
Author(s):  
GLEISON ROBSON DESIDÉRIO ◽  
PATRIK BARCELOS-SILVA ◽  
WAGNER RAFAEL M. DE SOUZA ◽  
ANA MARIA PES ◽  
CARLOS AUGUSTO S. DE AZEVÊDO
Keyword(s):  
New Species ◽  
New Records ◽  
The State ◽  
Northeast Region ◽  
Number Of Species ◽  
Species Checklist ◽  
First Time ◽  
One New Species ◽  
A New Species ◽  
Made In

In order to improve knowledge of Trichoptera diversity in Northeast Region, Brazil, we present here the first checklist of caddisflies from Maranhão State with a description of a new species and geographical records for the Northeast Region and for all of Brazil. Collections were made in 16 sites distributed in three municipalities of Maranhão State. A total of 54 caddisflies species, 26 genera and 10 families were recorded, including one new species of Leptoceridae, Triplectides maranhensis sp. nov., which is described and illustrated. All species listed here are recorded for the first time for the state, 23 of which are new records for the Northeast Region, as well as five new species for Brazil. These results increase the number of species reported from the Northeast Region from 167 to 221. 

Biological Production of (S)-acetoin: A State-of-the-Art Review

2019 ◽  
Vol 19 (25) ◽  
pp. 2348-2356 ◽  
Author(s):  
Neng-Zhong Xie ◽  
Jian-Xiu Li ◽  
Ri-Bo Huang
Keyword(s):  
Side Effects ◽  
Chemical Synthesis ◽  
State Of The Art ◽  
Optically Active ◽  
Considerable Progress ◽  
Future Prospects ◽  
Chiral Compound ◽  
Biological Production ◽  
Acetoin Production ◽  
Made In

Acetoin is an important four-carbon compound that has many applications in foods, chemical synthesis, cosmetics, cigarettes, soaps, and detergents. Its stereoisomer (S)-acetoin, a high-value chiral compound, can also be used to synthesize optically active drugs, which could enhance targeting properties and reduce side effects. Recently, considerable progress has been made in the development of biotechnological routes for (S)-acetoin production. In this review, various strategies for biological (S)- acetoin production are summarized, and their constraints and possible solutions are described. Furthermore, future prospects of biological production of (S)-acetoin are discussed.

Taxonomy of Neomuscina Townsend (Diptera, Muscidae) from Brazil

Zootaxa ◽  
2012 ◽  
Vol 3504 (1) ◽  
pp. 1 ◽  
Author(s):  
ALESSANDRE PEREIRA-COLAVITE ◽  
CLAUDIO J. B. DE CARVALHO
Keyword(s):  
New Species ◽  
Species Distributions ◽  
Morphological Characters ◽  
Minas Gerais ◽  
Identification Key ◽  
Male And Female ◽  
Number Of Species ◽  
Three New Species ◽  
New Distribution

Neomuscina Townsend includes 41 species distributed throughout the Nearctic and Neotropical Regions. Although the genus has a large number of species, it has been ignored and its taxonomy is confusing and has many flaws. In this work we analyzed the following species recorded for Brazil: Neomuscina atincta Snyder, N. atincticosta Snyder, N. capalta Snyder, N. currani Snyder, N. douradensis Lopes & Khouri, N. goianensis Lopes & Khouri, N. inflexa (Stein), N. instabilis Snyder, N. mediana Snyder, N. mimosa Lopes & Khouri, N. neosimilis Snyder, N. nigricosta Snyder, N. paramediana Lopes & Khouri, N. pictipennis pictipennis (Bigot), N. ponti Lopes & Khouri, N. sanespra Snyder, N. schadei Snyder, N. similata Snyder, N. stabilis (Stein), N. transporta Snyder, N. vitoriae Lopes & Khouri and N. zosteris (Shannon & Del Ponte). Neomuscina nigricosta and N. transporta are new distribution records for Brazil. Three new species are described: Neomuscina anajeensis sp. nov. from Anagé (Bahia), Neomuscina maculata sp. nov. from Botelhos (Minas Gerais) and Neomuscina snyderi sp. nov. from Mata de São João (Bahia). An identification key based on the morphological characters of both male and female is provided. Species distributions are discussed and updated, and the number of species now recorded for Brazil is 29.

scholarly journals Simultaneity and Precise Time in Rotation

Universe ◽  
2019 ◽  
Vol 5 (12) ◽  
pp. 226 ◽  
Author(s):  
Don Koks
Keyword(s):  
Time Coordinate ◽  
Near Future ◽  
Precise Time ◽  
Made In

I analyse the role of simultaneity in relativistic rotation by building incrementally on its role in simpler scenarios. Historically, rotation has been analysed in 1 + 1 dimensions; but my stance is that a 2 + 1 -dimensional treatment is necessary. This treatment requires a discussion of what constitutes a frame, how coordinate choices differ from frame choices, and how poor coordinates can be misleading. I determine how precisely we are able to define a meaningful time coordinate on a gravity-free rotating Earth, and discuss complications due to gravity on our real Earth. I end with a critique of several statements made in relativistic precision-timing literature, that I maintain contradict the tenets of relativity. Those statements tend to be made in the context of satellite-based navigation; but they are independent of that technology, and hence are not validated by its success. I suggest that if relativistic precision-timing adheres to such analyses, our civilian timing is likely to suffer in the near future as clocks become ever more precise.

scholarly journals III. On the nature and construction of the sun and fixed stars

1795 ◽  
Vol 85 ◽  
pp. 46-72 ◽  
Keyword(s):  
Central Body ◽  
Planetary System ◽  
Considerable Progress ◽  
The Sun ◽  
Great Satisfaction ◽  
The Earth ◽  
The World ◽  
Celestial Bodies ◽  
The Universe ◽  
Made In

Among the celestial bodies the sun is certainly the first which should attract our notice. It is a fountain of light that illuminates the world! it is the cause of that heat which main­tains the productive power of nature, and makes the earth a fit habitation for man! it is the central body of the planetary system; and what renders a knowledge of its nature still more interesting to us is, that the numberless stars which compose the universe, appear, by the strictest analogy, to be similar bodies. Their innate light is so intense, that it reaches the eye of the observer from the remotest regions of space, and forcibly claims his notice. Now, if we are convinced that an inquiry into the nature and properties of the sun is highly worthy of our notice, we may also with great satisfaction reflect on the considerable progress that has already been made in our knowledge of this eminent body. It would require a long detail to enumerate all the various discoveries which have been made on this subject; I shall, therefore, content myself with giving only the most capital of them.

scholarly journals PSV-37 Reemergence of cyathostomins species demonstrates anthelmintic resistance following drug administration in horses

2020 ◽  
Vol 98 (Supplement_4) ◽  
pp. 335-335
Author(s):  
Alexa C Johnson ◽  
Amy S Biddle
Keyword(s):  
Anthelmintic Resistance ◽  
Macrocyclic Lactones ◽  
Number Of Species ◽  
Molecular Approaches ◽  
Pyrantel Pamoate ◽  
Drug Classes ◽  
Blast Database ◽  
Resistance Patterns ◽  
Near Future ◽  
Ncbi Blast

Abstract Arbitrary administration of anthelmintics to control equine gastrointestinal worms has led to increased resistance to the three broad-spectrum drug classes; benzimidazoles, tetrahydropyrimidines, and macrocyclic lactones. With little promise of new drug classes to target cyathostomins being introduced to the market in the near future, anthelmintic drugs must be administered judiciously to prevent complete anthelmintic parasite resistance. The objective of this study is to determine the reemergence rate of cyathostomins following three commercial horse dewormers during summer. Nine horses housed at two locations were enrolled to the study and was repeated June–September through 2017–2019. Horses were removed from the study if sequencing failed due to low egg recovery for more than 50% of the timepoints. Ivermectin (macrocyclic lactones; n = 6), Moxidectin (macrocyclic lactones; n = 8) and Strongid (pyrantel pamoate; n = 8) were administered to horses and fecal samples were collected every 14d for 98d. Samples were tested using fecal egg counts with a modified McMaster technique and 18S rRNA profiling of the V5.8 and ITS1 regions. Sequences were clustered and taxonomy was assigned against a custom NCBI Blast+ database with the aligned sequences of 19 cyathostomins. Data were analyzed using presence/absence methods in R studio. Treatment and Day significantly impacted the average number of species present (P < 0.001). Moxidectin had the lowest number of species present followed by Strongid then Ivermectin (7.14, 10.17, 11.09, respectively). Equine shedder status had no effect on the average number of species present (P > 0.05). Six species, CO. labiatus, CS. catinatum, CY. auriculatus, CY. elongatus, CT. goldi and CT. longibursatus, showed resistance to the three treatments (P > 0.05). Moxidectin was the most effective at eradicating cyathostomins infestations (P < 0.05). Identifying resistance patterns at the species level will enable mechanistic molecular approaches to determine anthelmintic resistance in cyathostomins.

Revision of European and North African Folsomides Stach with special emphasis on the Canarian fauna (Collembola: Isotomidae)

1992 ◽  
Vol 23 (4) ◽  
pp. 453-473 ◽  
Author(s):  
Arne Fjellberg
Keyword(s):  
New Species ◽  
Canary Islands ◽  
Morphological Characters ◽  
Maxillary Palp ◽  
North African ◽  
African Species ◽  
Mouth Region ◽  
Generic Rank ◽  
Number Of Species ◽  
Narrow Definition

AbstractThe genus Folsomides Stach, 1922 is redefined and given a narrow definition based on a limited set of consistent morphological characters: Position and distribution of tergal macrosensilla, chaetotaxy of mouth region, tibiotarsi, ventral tube and furca. Eighteen new species are described from the Canary Islands: semiparvulus sp. n., xerophilus sp. n., vinosus sp. n., cumbrosus sp. n., unicus sp. n., terrus sp. n., pocosensillatus sp. n., nigrocellatus sp. n., teno sp. n., oromii sp. n., ononicolus sp. n., graminis sp. n., famarensis sp. n., pinicolus sp. n., intermedius sp. n., tonellus sp. n., supranubius sp. n. and analuisae sp. n. The following European/African species are redescribed: parvulus Stach, portucalensis Gama, angularis (Axelson), cf. petiti Delamare, lawrencei Gers & Deharveng, cf. zairensis Martynova, nanus Ellis and centralis (Denis). Highly discriminate species characters are found in maxillary palp, tibiotarsal chaetotaxy and distribution of tergal microsensilla. A number of species are removed from Folsomides, and Subisotoma Stach, 1947 is given generic rank.

Nomenclatural notes in the Pleurothallidinae (Orchidaceae): Stelis

Phytotaxa ◽  
2015 ◽  
Vol 203 (3) ◽  
pp. 292 ◽  
Author(s):  
Adam Karremans
Keyword(s):  
New Species ◽  
Short Discussion ◽  
Made In

Nomenclatural changes are made in order to place within Stelis a series of species that belong to it in the sense of Genera Orchidacearum, and without previous available names in that genus. New species, names and combinations are proposed, a short discussion for the reasoning is given.

New species of the genus Cenophengus LeConte 1881 (Coleoptera; Phengodidae) from Mexico and Guatemala

Zootaxa ◽  
2021 ◽  
Vol 5023 (2) ◽  
pp. 223-238
Author(s):  
VIRIDIANA VEGA-BADILLO ◽  
SANTIAGO ZARAGOZA-CABALLERO ◽  
JESSICA JAZMÍN RÍOS-IBARRA
Keyword(s):  
New Species ◽  
New Taxa ◽  
Additional Species ◽  
Number Of Species ◽  
San Luis ◽  
San Luis Potosi ◽  
San Luis Potosí

Six new species of the genus Cenophengus LeConte, 1881 are described. Five of these new species were collected in Mexico, in the states of Hidalgo (Cenophengus mboi sp. nov. and Cenophengus hnogamu̱i sp. nov.), Coahuila (Cenophengus kikapu sp. nov.) and San Luis Potosí (Cenophengus tupae sp. nov., Cenophengus mumui sp. nov.). An additional species was collected in Puerta Parada, Guatemala (Cenophengus xiinbali sp. nov.). The new taxa described in the present study increase to 27 the number of species assigned to Cenophengus.  

Depressive Illnesses in Children and Adolescents: A Review of Current Concepts

1985 ◽  
Vol 30 (2) ◽  
pp. 119-129 ◽  
Author(s):  
B.J. Mcconville ◽  
R.T. Bruce
Keyword(s):  
Children And Adolescents ◽  
Current Knowledge ◽  
Considerable Progress ◽  
Childhood And Adolescence ◽  
Age Related ◽  
Developmental Age ◽  
The Subject ◽  
Made In

Considerable progress has been made in our understanding of depressive illnesses in childhood and adolescence, especially over the last several years. A number of major books on the subject have now appeared, along with a large number of individual papers. This paper attempts to summarize current knowledge, and indicates developmental, age-related and other issues which still require further study.

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