scholarly journals The Disappearing Lamellae: Implications of New Findings in the Family Equidae Suggest the Loss of Nuchal Ligament Lamellae on C6 and C7 Occurred After Domestication

2018 ◽  
Vol 68 ◽  
pp. 108-114 ◽  
Author(s):  
Sharon May-Davis ◽  
Wendy Brown ◽  
Zefanja Vermeulen
Author(s):  
Ghillean T. Prance

AbstractA review is given of the studies of Ghillean Prance and associates on the Chrysobalanaceae over the past sixty years. This has focussed on defining the generic boundaries in the family and on monographic work with a worldwide approach to this pantropical family. The importance of field studies for work on monographs and Floras is emphasized. Monographs are still the basis for much work on conservation, ecology and economic botany and are needed as a foundation for molecular studies. The importance of being open to experimenting with new techniques and as a result being willing to change the taxonomy in accordance with new findings is demonstrated and emphasized. The twelve genera of the Chrysobalanaceae at the beginning of this career-long study have now increased to twenty-eight in order to present a much better monophyletic and evolutionary arrangement based on recent molecular evidence. In particular it was necessary to divide and rearrange the originally large genera Parinari and Licania into a number of smaller segregate genera. All known species were included in a worldwide monograph published in 2003. A brief review of the economic use for the family is given.


2021 ◽  
Vol 4 (6) ◽  
Author(s):  
EVGENY V. YAN ◽  
OLESYA D. STRELNIKOVA ◽  
ALEXANDER G. PONOMARENKO

Two species of Jurodidae: Jurodes ignoramus and Jurodes minor are redescribed, new characters presented, and characters from original descriptions are phylogenetically reevaluated, justifying a placement of the family within the suborder Archostemata. The new species Jurodes shef sp. nov. from the Lower Cretaceous locality Khasurty (Berriasian-Barremian, Zakamenskiy district, Buryatia Republic, Russia) is described and 2 new specimens of J. ignoramus Ponomarenko, 1985 and 5 additional specimens of J. minor Ponomarenko, 1990 are recorded. Jurodids from Khasurty are morphologically closer to those from Daohugou locality (Middle–Upper Jurassic, Inner Mongolia, China).


2012 ◽  
Vol 81 (3) ◽  
pp. 125-146 ◽  
Author(s):  
Francesca Benzoni ◽  
Roberto Arrigoni ◽  
Fabrizio Stefani ◽  
Bastian T. Reijnen ◽  
Simone Montano ◽  
...  

The scleractinian species Psammocora explanulata and Coscinaraea wellsi were originally classified in the family Siderastreidae, but in a recent morpho-molecular study it appeared that they are more closely related to each other and to the Fungiidae than to any siderastreid taxon. A subsequent morpho-molecular study of the Fungiidae provided new insights regarding the phylogenetic relationships within that family. In the present study existing molecular data sets of both families were analyzed jointly with those of new specimens and sequences of P. explanulata and C. wellsi. The results indicate that both species actually belong to the Cycloseris clade within the family Fungiidae. A reappraisal of their morphologic characters based on museum specimens and recently collected material substantiate the molecular results. Consequently, they are renamed Cycloseris explanulata and C. wellsi. They are polystomatous and encrusting like C. mokai, another species recently added to the genus, whereas all Cycloseris species were initially thought to be monostomatous and free-living. In the light of the new findings, the taxonomy and distribution data of C. explanulata and C. wellsi have been updated and revised. Finally, the ecological implications of the evolutionary history of the three encrusting polystomatous Cycloseris species and their free-living monostomatous congeners are discussed.


2012 ◽  
Vol 26 (2) ◽  
pp. 161-179 ◽  
Author(s):  
Jolien Huybrechts ◽  
Wim Voordeckers ◽  
Nadine Lybaert

This article aims to increase our understanding of family firms’ entrepreneurial risk-taking behavior by looking at the differences between family and nonfamily firms and by studying variations among family firms. We find empirical support for a positive influence of a nonfamily CEO on the family firm’s level of entrepreneurial risk taking during the initial years of his or her CEO tenure and a leveling out of entrepreneurial risk taking as the CEO tenure of the nonfamily CEO is extended. We build on the concept of psychological ownership to explain these new findings.


2021 ◽  
Vol 6 (39) ◽  
pp. 74-89
Author(s):  
Mohd Kamal Mohd Shah ◽  
Saifulazry Mokhtar ◽  
Irma Wani Othman ◽  
Muhammad Safuan Yusoff ◽  
Mohd. Sohaimi Esa ◽  
...  

This paper provides an understanding of the social structure seen as a phenomenology that directs one’s thinking in relation to the interpretation and meaning of life experiences in family institutions where family adaptation is a significant factor in determining the success of expatriate academics. The objective of the study was to unravel expatriate interpretations of expatriation decisions, where such interpretations were debated and taking into account family adaptability as a significant party in determining the success of the assignment of academics who have continuity with the experience of expatriate institutions in the host country. The research was carried out by utilising qualitative methods of in-depth interviews with 20 expatriate academics selected from three Malaysian Public Universities. While the appropriate criteria for respondents include the following characteristics, namely (a) has resided for at least one year in Malaysia using a valid employee visa, (b) has been offered a position as academic staff and has renewed a contract of service, (c) a self-initiated expatriate in undertaking expatriation and (d) work full-time and is not classified as an inter-university exchange staff or on sabbatical leave. The study found that the family factor is the influence of the career environment of an expatriate academic while serving in Malaysia. This is seen as a valuable input for the expatriate academics in adapting to the career of the country’s higher education arena while encouraging retention of expatriate academics in the higher education industry in Malaysia. Two new findings were presented namely (i) moral and emotional support systems which give positive indications of international assignment success, and (ii) support of the relevant social networks with local communities as one of the determinants of expatriate success adapting to the host country environment.


2010 ◽  
Vol 22 (4) ◽  
pp. 949-970 ◽  
Author(s):  
Gerald R. Patterson ◽  
Marion S. Forgatch ◽  
David S. DeGarmo

AbstractFour different sources for cascade effects were examined using 9-year process and outcome data from a randomized controlled trial of a preventive intervention using the Parent Management Training—Oregon Model (PMTO™). The social interaction learning model of child antisocial behavior serves as one basis for predicting change. A second source addresses the issue of comorbid relationships among clinical diagnoses. The third source, collateral changes, describes events in which changes in one family member correlate with changes in another. The fourth component is based on the long-term effects of reducing coercion and increasing positive interpersonal processes within the family. New findings from the 9-year follow-up show that mothers experienced benefits as measured by standard of living (i.e., income, occupation, education, and financial stress) and frequency of police arrests. It is assumed that PMTO reduces the level of coercion, which sets the stage for a massive increase in positive social interaction. In effect, PMTO alters the family environment and thereby opens doors to healthy new social environments.


2019 ◽  
Vol 192 (3) ◽  
pp. 449-473
Author(s):  
Eugene V Kljuykov ◽  
Svetlana E Petrova ◽  
Galina V Degtjareva ◽  
Ekaterina A Zakharova ◽  
Tahir H Samigullin ◽  
...  

Abstract In Apiaceae, embryos of most species have two cotyledons, but some species are consistently monocotylar. Traditionally, the monocotyly has been considered as taxonomically important at the generic level, despite its presumably multiple origins in the family. In this study, a survey of the published literature and our new findings on cotyledon number, embryo and seedling morphology and nrDNA ITS sequence data are presented to provide modern insights into the taxonomic distribution and phylogenetic relationships of monocotylar taxa. A molecular phylogenetic tree representing much of the diversity of monocotylar Apiaceae was produced to re-evaluate the potential implication of monocotyly for systematics and to elucidate its evolutionary significance in the family. Our data document the presence of monocotylar seedlings in 59 species representing 15 genera, in three species and one genus (Postiella) of which monocotylar seedlings are reported for the first time. Analysis of ITS sequence data indicates that monocotyly in Apiaceae has arisen independently in at least seven different lineages encompassing five of 41 major clades of subfamily Apioideae, but not in early-diverging lineages. Parallel evolution has resulted in a remarkable morphological similarity in monocotylar embryo and seedling organization, especially in the proportion of the cotyledon length to the axis of the embryo and the multifunctional cotyledonary tube in the seedling. These features could be considered as adaptations to a geophilic life form, as all monocotylar species are perennial herbs with tuberous underground organs distributed mainly in the Ancient Mediterranean region. The single cotyledon in Apiaceae, as in most other monocotyledonous eudicots, could be interpreted as two united cotyledons (syncotyly), but further developmental studies are needed to test this hypothesis.


Author(s):  
A. Sazhnev

In 2015 year, for the first time in Russia, systematic investigations into poorly studied group of Coleoptera of the family Heteroceridae were initiated. Initial results (for the past 5 years) are presented in this work. Data obtained from these studies can be divided into several thematic groups: systematic acts, faunistic findings (including zoogeographic notes), and materials on bioecological features of heterocerida. Systematics: based on the examination of the type specimens of Heteroсerus kamtschaticus Egorov, 1989, its synonymy is with Heteroerus fenestratus (Thunberg, 1784) is established. The validity of Heterocerus fausti Reitter, 1879, and H. heydeni Kuwert, 1890 is restored. Faunistics: Augyles interspidulus (Charpentier, 1979), A. tokejii Nomura, 1958, A. turanicus (Reitter, 1887), A. marmota (Kiesenwetter, 1850), and Heterocerus kaszabi Charpentier, 1979 are recorded for the first time in Russia; lists and new findings of heterocerids species in the European part of Russia, Caucasus, Ural, West Siberia, Russian Far East, Azerbaijan, Kyrgyzstan, Tadjikistan, Uzbekistan, and Mongolia are presented. Ecology: for the first time, the composition and structure of heterocerid population are studied in the littoral zone of waterbodies in the north of the Lower Volga region; data on the biotopical diversification, seasonal dynamics and hibernation of some species of mud-loving beetles are presented. The position of beetles of the family Heteroceridae in food webs of riparian communities in European Russia and Mongolia is discussed, and the main trophic links within the Heteroceridae related communities are recorded. Symbionts of heterocerids are also discussed.


Author(s):  
Maickel Armenteros ◽  
Alexei Ruiz-Abierno ◽  
Wilfrida Decraemer

The taxonomy of the family Desmodoridae (Nematoda: Desmodorida) is partially revised based on morphology. The diagnoses of the Desmodoridae and the subfamilies Desmodorinae and Spiriniinae are emended to accommodate re-analyzed morphological features. Eight known species are redescribed and the implication of the new findings for the taxonomy of the group is discussed. Amphispira and Metadesmodora are confirmed as genera inquirendae. Alaimonema and Sigmophoranema, and their corresponding type species, are proposed as inquirendae due to poor descriptions of the type material. The other three species of Sigmophoranema are transferred to the genus Onyx because they bear the diagnostic features of this group: spear-like dorsal tooth and s-shape precloacal supplements. Echinodesmodora, Paradesmodora and Stygodesmodora are transferred to the Spiriniinae based on the absence of a head capsule and on the amphidial fovea being surrounded by cuticle striation. Paradesmodora toreutes is transferred to the genus Acanthopharyngoides as A. toreutes comb. nov. The genus Onepunema does not fit in the family Desmodoridae because of diorchic males; thus, it is regarded as taxon incertae sedis. Lists of valid genera for the two subfamilies are provided. A dichotomic key for the identification of the 14 genera within the Spiriinae is provided.


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