Fossil evidence of initial radiation of Cercidiphyllaceae

Palaeobotany ◽  
2018 ◽  
Vol 9 ◽  
pp. 54-75
Author(s):  
L. B. Golovneva ◽  
A. A. Zolina

Cercidiphyllaceae-like leaves and fruits from the Lower Cretaceous deposits of Northeastern Asia were restudied. In the result one species of Jenkinsella fruits and five species of Trochodendroides leaves were recognized, including Trochodendroides potomacensis (Ward) Bell, T. buorensis Golovneva, T. sittensis Golovneva, sp. nov., T. vachrameeviana (Iljinskaja) Golovneva, comb. nov., and T. denticulata (Budantsev et Kiritchkova) Golovneva, comb. nov. Two new combinations and one new species are published. These plants had very small leaves and probably were shrubs. Fruits of Nyssidium orientale Samylina from the Barremian-Aptian Starosuchan Formation (Primorye, Russia) have no follicular characters as Jenkinsella fruits. Their affinity, not only to Cercidiphyllum-like plants, but to angiosperms in general, is doubtful. Leaves and fruits of Cercidiphyllum sujfunense Krassilov from the lower-middle Albian Galenki Formation (Primorye) also can not be assigned to Cercidiphyllaceae. Leaves have pinnate, brochidodromous venation and are comparable with those of Asiatifolium elegans Sun, Guo et Zheng, which were recorded from the Frentsevka Formation of the Partizansk coal basin, Primorye, Russia, and from the Chengzihe Formation, Northeastern China. Thus, the first reliable records of the genus Trochodendroides appear in the early-middle Albian. The relationship of these leaves with Cercidiphyllaceae is confirmed by finds of associated fruits Jenkinsella filatovii and by significant diversity of Trochendroides in the Late Albian-Cenomanian. In the early-middle Albian the genus Trochendroides was a minor component of the conifer-dominated Mesophytic floras. These fossils reflect the early radiation of Cercidiphyllaceae and indicate that this family began to diversify more then 30 million years before the Tertiary. Investigation of the early-middle Albian Cercidiphyllaceae provides important new data for our understanding of the early evolution of eudicots.

2019 ◽  
pp. 774-792
Author(s):  
Keith F. Snider

This chapter explores the relationship of U.S. defense management to public administration. It argues that public administration, as a field of study, plays a minor role in defense acquisition, because acquisition has unique characteristics that separate it from the mainstream of the field. The tenuous connections between acquisition and public administration have led to an issue of academic legitimacy in that the discipline has failed to respond to the needs of acquisition professionals. The chapter then presents a discussion and illustration of philosophical pragmatism as a potential contribution of administrative theory to acquisition practice, and it concludes with thoughts on the potential for acquisition to adopt pragmatism as a guiding way for thought and practice.


2007 ◽  
Vol 4 (6) ◽  
pp. 4443-4458 ◽  
Author(s):  
T. Leefmann ◽  
J. Bauermeister ◽  
A. Kronz ◽  
V. Liebetrau ◽  
J. Reitner ◽  
...  

Abstract. Methane-related carbonates from Hydrate Ridge typically show several macroscopically distinguishable phases, namely whitish aragonite, lucent aragonite, and gray micrite. The relationship of these phases to particular microorganisms or biogeochemical processes is as yet unclear. We used a miniaturized biomarker technique on mg samples, combined with factor analysis and subsequent electron microprobe analysis, to study lipid biomarkers and chemical compositions of the individual phases. This allows us to identify particular mechanisms involved in the formation of the different carbonate precipitates. Our combined analysis of biomarkers and petrographic traits shows that most of the lipids related to the anaerobic oxidation of methane (>90% by weight) are concentrated within only a minor compartment (~20% by volume) of the Hydrate Ridge carbonates (whitish aragonite). The patterns indicate that the whitish aragonite represents fossilized biofilms of methanotrophic consortia, whereas the precipitation of the lucent aragonite does not seem to be directly controlled by microorganisms. The gray micrite shows a partly Mg-calcitic mineralogy, higher pyrite contents, and a much higher proportion of allochthonous biomarkers. The formation of these precipitates is interpreted to reflect periodic methane-rich fluid pulses that disrupted the sediments and promoted the growth of the respective methanotrophic consortia along fluid pathways.


Zootaxa ◽  
2019 ◽  
Vol 2729 (1) ◽  
pp. 58
Author(s):  
CHRISTER HANSSON

Inti gen. nov. (Hymenoptera: Eulophidae: Entedoninae), is described from Costa Rica and the Dominican Republic, and includes one new species, I. levis sp. nov. The new genus is characterized by four autapomorphies, and the possession of an additional 14 synapomorphies. Inti is compared to the Australian genus Horismenoides Girault with which it shares the most apomorphies, indicating a possible sister-group relationship. The relationship of Inti to the tribe Euderomphalini and to other groups in the subfamily is discussed briefly.


1973 ◽  
Vol 51 (5) ◽  
pp. 891-897 ◽  
Author(s):  
W. A. Charlton ◽  
A. Ahmed

The flower of Ranalisma humile is comparable in morphology to those of other alismads. The vascular anatomy is noteworthy. Flowers of R. humile are provided with a major (central) vascular system supplying androecial and gynoecial vasculature and a variable amount of the sepal and petal vasculature, and a minor (peripheral) system which supplies the rest of the perianth vasculature. There is very little anastomosis between the two systems. It is suggested that the variability of perianth vascular supply reflects variability in timing of differentiation events. The occurrence of an almost independent peripheral vascular system is probably of significance in a consideration of the relationship of Ranalisma humile to other alismads.


Author(s):  
Barbara Mikac ◽  
Pat Hutchings

During several sampling periods in the Northern Adriatic Sea (Mediterranean) from 2003–2010, one species of Pista and one of Pistella were found. They were initially identified as Pista cf. lornensis (Pearson, 1969), but detailed examination revealed the presence of two new species, one belonging to the genus Pistella Hartmann-Schröder, 1996, P. rovignensis sp. nov. and one belonging to the genus Pista, P. adriatica sp. nov. These two species differ from each other in the structure of the branchiae, shape of lateral lobes and the structure of the anterior thoracic uncini. The two new species are compared with other species of Pistella and Pista currently known. The relationship of Pistella and Pista is confusing and a complete revision of the two genera is urgently needed together with other genera characterized by having long-handled thoracic uncini.


1970 ◽  
pp. 157
Author(s):  
Sirkku Pihlman

When I read Elina Salminen’s doctoral thesis I found myself many times thinking, why she finds the relationship of the museums and the private collections called museums so very problematic. In cases examined by her, several museum professionals considered these private collections to be of a minor significance from the standpoint of the institutional museums. On the other hand, interviewed private collectors whose collections have been accepted in a professional museum collection did not deal the professional principles of e.g. the permanence of collections. This seems not to be a severe confrontation anyway. 


1959 ◽  
Vol 37 (3) ◽  
pp. 479-490 ◽  
Author(s):  
Leslie A. Garay ◽  
Michael Wirth

The generic limits of Mormolyca Fenzl are extended to include Cyrtoglottis Schltr., on the basis of intermediate species. A previously misunderstood species, Maxillaria galeata Scheidw., is included in the genus Mormolyca, and the relationship of this genus to the rest of the Maxillaria-alliance is discussed. One new species, Mormolyca polyphylla, is described, and a synopsis of the genus is presented.


Zootaxa ◽  
2006 ◽  
Vol 1278 (1) ◽  
pp. 1 ◽  
Author(s):  
TOMAS MUSTELIN

Twenty-two new taxa of owlet moths (families Erebidae and Noctuidae) are described along with three status changes from subspecies to species, eleven new synonymies, and twenty-one new combinations. Of the new taxa, one is a new tribe, Annaphilini Mustelin, n. tribe, and twenty-one are new species from southern California: Drasteria convergens Mustelin, n.sp., Tarachidia nigra Mustelin, n.sp., Oncocnemis duplex Troubridge and Mustelin, n.sp., O. helena Mustelin, n.sp., O. sala Mustelin, n.sp., O. kelsoensis Robertson and Mustelin, n.sp., Annaphila scurlockorum Sala and Mustelin, n.sp., Cryphia flavipuncta Mustelin, n.sp., Protoperigea umbricata Mustelin, n.sp., P. subterminata Mustelin, n.sp., P. parvulata Mustelin, n.sp., P. calientensis Mustelin, n.sp., Aseptis fanatica Mustelin, n.sp., Aseptis torreyana Mustelin, n.sp., Apamea robertsoni Mikkola and Mustelin, n.sp., A. digitula Mustelin and Mikkola, n.sp., Photedes sofiae Mustelin, n.sp., Mammifrontia sarae Mustelin, n.sp., Lasionycta sala Troubridge and Mustelin, n.sp., Trichocerapoda harbisoni Mustelin, n.sp., and T. oceanis Robertson and Mustelin, n.sp. The relationship of these new species to their closest relatives is discussed. The following new combinations are proposed to maintain consistency in generic concepts between the European and North American faunas: Agrochola decipiens (Grote, 1881), n. comb., Anarta chartaria (Grote, 1873), n. comb., Anarta trifolii (Hufnagel, 1766), n. comb., Anarta mutata (Dod, 1913), n. comb., Anarta fulgora (Barnes & McDunnough, 1918), n. comb., Anarta castrae (Barnes & McDunnough, 1912), n. comb., Anarta hamata (McDunnough, 1930), n. comb., Anarta oregonica (Grote, 1881), n. comb., Anarta montanica (McDunnough, 1930), n. comb., Anarta columbica (McDunnough, 1930), n. comb., Anarta alta (Barnes & Benjamin, 1924), n. comb., Anarta subalbida (Barnes & Benjamin, 1924), n. comb., Anarta obesula (Smith, 1904), n. comb., Anarta farnhami (Grote, 1873), n. comb., Anarta crotchi (Grote, 1880), n. comb., Anarta oaklandiae (McDunnough, 1937), n. comb., Anarta projecta (McDunnough, 1938), n. comb., Anarta edwardsii (Smith, 1888), n. comb., Anarta florida (Smith, 1900), n. comb., Anarta antica (Smith, 1891), n. comb., and Anarta decepta (Grote, 1883), n. comb.


2020 ◽  
Vol V (I) ◽  
pp. 207-220
Author(s):  
Muhammad Adnan Maqbool ◽  
Mahr Muhammad Saeed Akhtar

The study is an empirical exploration into TQM practices in Pakistani higher education with a focus on determining relationship between the variables: Knowledge Management (KM) and Organizational Culture (OC) in the context of higher education in Pakistan. It employed a quantitative paradigm to the investigation with correlational design. All the university teachers comprised the population of this study. Six public sector universities of Punjab were randomly selected. The results of the analysis showed all the three variables summed mean as 3.41, 3.3, 3.5 respectively all indicating a minor level of the presence of the TQM practices. OC showed relatively higher favorable response. The inferential statistics revealed that the relationship between OC and KM was positive, moderate and statistically significant (r=.491, p<.05). Demographical variables included respondents� gender, qualification, experience. Gender and Qualification was found to have no influence on KM and OC, while experience showed significant effect on the two variables.


2020 ◽  
Vol 16 (2) ◽  
pp. 56-66
Author(s):  
Elena G. Komissarova ◽  
Nataliya V. Gorina

The current article deals with historical and legal study of those legislative ideas that became the basis for introducing relations on the actual upbringing of a minor through the sphere of family law regulation. Using historical methodology, legal monuments of Soviet period – RSFSR KZAGS of 1918, CoMF of RSFSR of 1926, and RSFSR CoMF of 1969 are analyzed. In the context of the political and socio-economic development of society in this historical period, the author examines the legislative motives that led to the introduction of the relationship between the actual teacher and the pupil in the sphere of alimony for persons belonging to other family members. Analyzing specific historical, social, scientific and legal reality which there was a actual phenomenon of education in, the authors know the logic of legal thinking of the legislator who asked for the relationship of child-rearing, do not have an explicit legal basis, legal name in the form refer to it through the design of the actual education and as to the education of his family.


Sign in / Sign up

Export Citation Format

Share Document