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Article ; Online: The wasp genus Sphex in Sub-Saharan Africa (Hymenoptera

Thorleif H. Dörfel / Michael Ohl

European Journal of Taxonomy, Vol 796, Iss

Sphecidae)

2022 Volume 1

Abstract: The Afrotropical species of the sphecid genus Sphex are revised. Forty-six taxa are recognized, of which fifteen are newly described: Sphex abbotti nivarius subsp. nov., S. comorensis sp. nov., S. hades sp. nov., S. nefrens sp. nov., S. occidentalis sp. ... ...

Abstract	The Afrotropical species of the sphecid genus Sphex are revised. Forty-six taxa are recognized, of which fifteen are newly described: Sphex abbotti nivarius subsp. nov., S. comorensis sp. nov., S. hades sp. nov., S. nefrens sp. nov., S. occidentalis sp. nov., S. pseudopraedator sp. nov., S. pseudosatanas sp. nov., S. pulawskii sp. nov., S. rufoclypeatus sp. nov., S. satanas memnon subsp. nov., S. schmideggeri sp. nov., S. schoutedeni malawicus subsp. nov., S. socotrensis sp. nov., S. stadelmanni rufus subsp. nov. and S. victoria sp. nov. A new subgenus, Menkeella subgen. nov., is proposed for S. paulinierii Guérin Méneville, 1843. Four former synonyms are resurrected: Sphex pruinosus var. haemorrhoidalis Magretti, 1898, for which the replacement name of S. feijeni nom. nov. is proposed, S. camerunicus Strand, 1916, S. cinerascens Dahlbom, 1843 and S. abbotti W. Fox, 1891. Nine of the previously valid names are shown to be junior synonyms: Sphex haemorrhoidalis basuto (Arnold, 1947) and S. haemorrhoidalis kobrowi (Arnold, 1928) = S. umtalicus Strand, 1916; S. incomptus anonymus Leclercq, 1955 = S. nigrohirtus Kohl, 1895; S. neavei (Arnold, 1928) = S. abbotti W. Fox, 1891; S. observabilis (R. Turner, 1918) = S. ahasverus Kohl, 1890; S. rufiscutis (R. Turner, 1918) and S. mochii Giordani Soika, 1942 = S. jansei Cameron, 1910; S. rufiscutis laevigatus Arnold, 1951 = S. gaullei Berland, 1927; and S. stadelmanni integer (Arnold, 1928) = S. stadelmanni Kohl, 1895. Three previously synonymized species are transferred as new synonyms to different species: Sphex conradti Berland, 1927 = S. camerunicus Strand, 1916; S. kilimandjaroensis Cameron, 1908 = S. abbotti W. Fox, 1891; and S. nigripes var. pachyderma Strand, 1916 = S. umtalicus Strand, 1916. For three species, the actual type localities are on different continents than their labels indicate: Sphex ahasverus Kohl, 1890, S. castaneipes Dahlbom, 1843 and S. optimus F. Smith, 1856, with the first occuring in Africa instead of Australia and the other two presumably ...
Keywords	Sphex ; Afrotropic ; phylogeny ; barcoding ; Zoology ; QL1-991 ; Botany ; QK1-989
Subject code	590
Language	English
Publishing date	2022-02-01T00:00:00Z
Publisher	Consortium of European Natural History Museums
Document type	Article ; Online
Database	BASE - Bielefeld Academic Search Engine (life sciences selection)

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Article ; Online: Dynamics of the extended and intermediate range order in model polymer electrolyte poly(ethylene oxide) and lithium bis(trifluoromethanesulfonyl)imide

Peter Falus / Antonio Faraone / Stephan Förster / Kunlun Hong / Michael Ohl

Frontiers in Soft Matter, Vol

2023 Volume 3

Abstract: The dynamics of lithium ions and polymer chains were investigated at the molecular scale in the model polymer electrolyte Poly (ethylene oxide) (PEO)/Lithium bis(trifluoromethanesulfonyl)imide as a function of temperature. This system is known to present ...

Abstract	The dynamics of lithium ions and polymer chains were investigated at the molecular scale in the model polymer electrolyte Poly (ethylene oxide) (PEO)/Lithium bis(trifluoromethanesulfonyl)imide as a function of temperature. This system is known to present an intermediate range order from the arrangement of neighboring chain segments as well as an extended range order of cylindrically arranged chains. The collective dynamics of the systems at lengthscales matching these structural features was measured using Neutron Spin Echo spectroscopy, gaining insights into their lifetime. Moreover, using isotope substitution techniques the dynamics of the lithium ions with respect to the other atoms was probed. The obtained results are compared with the conductivity and the lithium self-diffusion coefficient measured by NMR to gain experimental insight on the molecular processes triggering lithium transport.
Keywords	solid polymer electrolytes (SPE) ; lithium ion batteries ; neutron spin echo ; intermediate range order (IRO) ; extended range order (ERO) ; polymer dynamics ; Chemistry ; QD1-999 ; Medical physics. Medical radiology. Nuclear medicine ; R895-920 ; Polymers and polymer manufacture ; TP1080-1185
Subject code	540
Language	English
Publishing date	2023-04-01T00:00:00Z
Publisher	Frontiers Media S.A.
Document type	Article ; Online
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Article ; Online: Comparative morphology of the musculature of the sting apparatus in Ampulex compressa (Hymenoptera, Ampulicidae) and Sceliphron destillatorium (Hymenoptera, Sphecidae)

Stefan Graf / Maraike Willsch / Michael Ohl

Deutsche Entomologische Zeitschrift, Vol 68, Iss 1, Pp 21-

2021 Volume 32

Abstract: The sting apparatus of aculeate Hymenoptera is derived from the ovipositor and is their most prominent apomorphy. In contrast to the frequently analysed sclerites of the sting apparatus, the associated musculature has largely been neglected. In this ... ...

Abstract	The sting apparatus of aculeate Hymenoptera is derived from the ovipositor and is their most prominent apomorphy. In contrast to the frequently analysed sclerites of the sting apparatus, the associated musculature has largely been neglected. In this study, we use micro-computed tomography to present a detailed description of the musculature of the sting apparatus of Ampulex compressa (Ampulicidae) and Sceliphron destillatorium (Sphecidae). We found that 12 of 15 muscles corresponding to the sting apparatus are homologous between both species examined and 13 muscles in comparison with Hymenoptera described in the literature. All muscles identified as critical for the act of stinging were found in both species. Moreover, we found the ventral tergum 8-tergum 9 muscle and the tergum 8-tergum 8 muscles in A. compressa and the second valvifer-second valvifer muscle in S. destillatorium. For the first time, we describe the ventral tergum 8-tergum 9 muscle and the second valvifer-second valvifer muscle that interconnects both body sides, in Hymenoptera.
Keywords	Biology (General) ; QH301-705.5
Language	English
Publishing date	2021-01-01T00:00:00Z
Publisher	Pensoft Publishers
Document type	Article ; Online
Database	BASE - Bielefeld Academic Search Engine (life sciences selection)

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Article ; Online: A comparative description of the mesosomal musculature in Sphecidae and Ampulicidae (Hymenoptera, Apoidea) using 3D techniques

Maraike Willsch / Frank Friedrich / Daniel Baum / Ivo Jurisch / Michael Ohl

Deutsche Entomologische Zeitschrift, Vol 67, Iss 1, Pp 51-

2020 Volume 67

Abstract: Conflicting hypotheses about the relationships among the major lineages of aculeate Hymenoptera clearly show the necessity of detailed comparative morphological studies. Using micro-computed tomography and 3D reconstructions, the skeletal musculature of ... ...

Abstract	Conflicting hypotheses about the relationships among the major lineages of aculeate Hymenoptera clearly show the necessity of detailed comparative morphological studies. Using micro-computed tomography and 3D reconstructions, the skeletal musculature of the meso- and metathorax and the first and second abdominal segment in Apoidea are described. Females of Sceliphron destillatorium, Sphex (Fernaldina) lucae (both Sphecidae), and Ampulex compressa (Ampulicidae) were examined. The morphological terminology provided by the Hymenoptera Anatomy Ontology is used. Up to 42 muscles were found. The three species differ in certain numerical and structural aspects. Ampulicidae differs significantly from Sphecidae in the metathorax and the anterior abdomen. The metapleural apodeme and paracoxal ridge are weakly developed in Ampulicidae, which affect some muscular structures. Furthermore, the muscles that insert on the coxae and trochanters are broader and longer in Ampulicidae. A conspicuous characteristic of Sphecidae is the absence of the metaphragma. Overall, we identified four hitherto unrecognized muscles. Our work suggests additional investigations on structures discussed in this paper.
Keywords	Biology (General) ; QH301-705.5
Subject code	590
Language	English
Publishing date	2020-05-01T00:00:00Z
Publisher	Pensoft Publishers
Document type	Article ; Online
Database	BASE - Bielefeld Academic Search Engine (life sciences selection)

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Article ; Online: Megalara garuda, a new genus and species of larrine wasps from Indonesia (Larrinae, Crabronidae, Hymenoptera)

Lynn Kimsey / Michael Ohl

ZooKeys, Vol 177, Iss 0, Pp 49-

2012 Volume 57

Abstract: A new genus and species, Megalara garuda is described from Sulawesi (Indonesia). The new species is one the largest known members of the crabronid subfamily Larrinae. It has a unique suite of putatively apomorphic morphological characters and is most ... ...

Abstract	A new genus and species, Megalara garuda is described from Sulawesi (Indonesia). The new species is one the largest known members of the crabronid subfamily Larrinae. It has a unique suite of putatively apomorphic morphological characters and is most closely related to the genus Paraliris. We found indications of a significant allometric variation in body size and mandibular length and shape in male Megalara, and the presence of acarinaria at least in females of the new genus. Allometric variation and acarinaria have previously been shown to occur in Paraliris, which is another indication for a close relationship of Megalara and Paraliris.
Keywords	Zoology ; QL1-991
Language	English
Publishing date	2012-03-01T00:00:00Z
Publisher	Pensoft Publishers
Document type	Article ; Online
Database	BASE - Bielefeld Academic Search Engine (life sciences selection)

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Article ; Online: Methyl quantum tunneling in ionic liquid [DMIm][TFSI] facilitated by Bis(trifluoromethane)sulfonimide lithium salt

Changwoo Do / Xiao-Guang Sun / Charl J. Jafta / Sheng Dai / Michael Ohl / Eugene Mamontov

Scientific Reports, Vol 8, Iss 1, Pp 1-

2018 Volume 7

Abstract: Abstract We probe, for the first time, quantum tunneling in the methyl groups of the ionic liquid [DMIm][TFSI] facilitated by the presence of Bis(trifluoromethane)sulfonimide lithium salt. The observation of tunneling is made possible by crystallization, ...

Abstract	Abstract We probe, for the first time, quantum tunneling in the methyl groups of the ionic liquid [DMIm][TFSI] facilitated by the presence of Bis(trifluoromethane)sulfonimide lithium salt. The observation of tunneling is made possible by crystallization, rather than vitrification, of [DMIm][TFSI] at low temperature. Neutron scattering measurements detect quantum tunneling excitations at ~27 μeV at temperatures below 30 K in the presence of LiTFSI at a concentration of 1 mol/kg, but not in salt-free [DMIm][TFSI]. This indicates that the methyl rotational potential barrier is reduced by the presence of LiTFSI, thus bringing the tunneling excitations into the measurable range. The salt-induced reduction of the rotational barrier is corroborated by quasi-elastic scattering data associated with stochastic re-orientation of methyl groups measured between 40 and 60 K.
Keywords	Medicine ; R ; Science ; Q
Subject code	541
Language	English
Publishing date	2018-07-01T00:00:00Z
Publisher	Nature Publishing Group
Document type	Article ; Online
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Article: Capillary condensation and gelling of microemulsions with clay additives

Gvaramia, Manuchar / Gaetano Mangiapia / Peter Falus / Michael Ohl / Olaf Holderer / Henrich Frielinghaus

Journal of colloid and interface science. 2018 Sept. 01, v. 525

2018

Abstract: The capillary condensation in bicontinuous microemulsions takes place when two parallel surfaces are narrowed that result in a completely lamellar microemulsion. We expected that this phase transition is also observable when the amount of hydrophilic ... ...

Abstract	The capillary condensation in bicontinuous microemulsions takes place when two parallel surfaces are narrowed that result in a completely lamellar microemulsion. We expected that this phase transition is also observable when the amount of hydrophilic surfaces from clay particles is raised, because hydrophilic surfaces induce lamellar ordering locally. Using small angle neutron scattering, the structure of microemulsions was observed as a function of clay content. The critical concentration is indicated by discontinuous structural changes and depends on the platelet diameter and is explained by the free energy of the platelets competing with the fluctuating medium. The gel phase transition is observed in the spectroscopic measurements where the diffusion motion is widely suppressed in the gel phase, but otherwise superimposes with the membrane undulations.
Keywords	Gibbs free energy ; additives ; blood platelets ; clay ; clay fraction ; emulsions ; gelation ; gels ; hydrophilicity ; neutron diffraction ; spectral analysis
Language	English
Dates of publication	2018-0901
Size	p. 161-165.
Publishing place	Elsevier Inc.
Document type	Article
ZDB-ID	241597-5
ISSN	1095-7103 ; 0021-9797
ISSN (online)	1095-7103
ISSN	0021-9797
DOI	10.1016/j.jcis.2018.04.032
Database	NAL-Catalogue (AGRICOLA)

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Article ; Online: Nanoscale rheology at solid-complex fluid interfaces

Sebastian Jaksch / Olaf Holderer / Manuchar Gvaramia / Michael Ohl / Michael Monkenbusch / Henrich Frielinghaus

Scientific Reports, Vol 7, Iss 1, Pp 1-

2017 Volume 7

Abstract: Abstract Here we present an approach to measure dynamic membrane properties of phospholipid membranes close to an interface. As an example we show results of the membrane dynamics of a phospholipid membrane multilayer-stack on a solid substrate (silicon). ...

Abstract	Abstract Here we present an approach to measure dynamic membrane properties of phospholipid membranes close to an interface. As an example we show results of the membrane dynamics of a phospholipid membrane multilayer-stack on a solid substrate (silicon). On this sample we were able to measure local interaction and friction parameters using Grazing Incidence Neutron Spin Echo Spectroscopy (GINSES), where an evanescent neutron wave probes the fluctuations close to a rigid interface. With this method it is possible to access length scales in the nano to micrometer region as well as energies in the μeV range. Using a new neutron resonator structure we achieved the required intensity gain for this experiment. During our investigations we found an excitation mode of the phospholipid membrane that has not been reported previously and only became visible using the new methodology. We speculate that the energy transported by that undulation can also serve to distribute energy over a larger area of the membrane, stabilizing it. This new methodology has the capability to probe the viscoelastic effects of biological membranes, becoming a new tool for tribology on the nanoscale and has allowed the observation of the hitherto invisible property of phospholipid membranes using neutrons.
Keywords	Medicine ; R ; Science ; Q
Subject code	612
Language	English
Publishing date	2017-06-01T00:00:00Z
Publisher	Nature Portfolio
Document type	Article ; Online
Database	BASE - Bielefeld Academic Search Engine (life sciences selection)

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Article: Revision of the digger wasps of the Ampulicidae and Heterogynaidae (Hymenoptera) of Saudi Arabia, with the description of a new species of the enigmatic genus Heterogyna Nagy

Soliman, Ahmed Mostafa / Hathal Mohammed Al Dhafer / Michael Ohl / Neveen Samy Gadallah

Journal of natural history. 2017 Sept. 10, v. 51, no. 33-34

2017

Abstract: The apoid wasps of the families Ampulicidae and Heterogynaidae of Saudi Arabia are revised. In Ampulicidae, four species in three genera are reported, of which three species are recorded for the first time from Saudi Arabia (Al-Baha, Asir and Riyadh ... ...

Abstract	The apoid wasps of the families Ampulicidae and Heterogynaidae of Saudi Arabia are revised. In Ampulicidae, four species in three genera are reported, of which three species are recorded for the first time from Saudi Arabia (Al-Baha, Asir and Riyadh regions): Ampulex assimilis Kohl, Dolichurus arabicus Ohl and Trirogma caerulea Westwood. Additionally, the family Heterogynaidae is reported for the first time from Saudi Arabia (Asir and Riyadh regions), and a new species, Heterogyna saudita sp. nov., is described, diagnosed and illustrated. An illustrated key to the species of Heterogyna from the Arabian Peninsula is provided. www.zoobank.org/urn:lsid:zoobank.org:pub:C23C70A7-AA1C-47C0-951A-D164E7B20001
Keywords	Ampulex ; Dolichurus ; new species ; taxonomic keys ; wasps ; Saudi Arabia
Language	English
Dates of publication	2017-0910
Size	p. 2057-2085.
Publishing place	Taylor & Francis
Document type	Article
ZDB-ID	1467695-3
ISSN	1464-5262 ; 0022-2933
ISSN (online)	1464-5262
ISSN	0022-2933
DOI	10.1080/00222933.2017.1355492
Database	NAL-Catalogue (AGRICOLA)

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Article ; Online: A unique nest-protection strategy in a new species of spider wasp.

Michael Staab / Michael Ohl / Chao-Dong Zhu / Alexandra-Maria Klein

PLoS ONE, Vol 9, Iss 7, p e

2014 Volume 101592

Abstract: Hymenoptera show a great variation in reproductive potential and nesting behavior, from thousands of eggs in sawflies to just a dozen in nest-provisioning wasps. Reduction in reproductive potential in evolutionary derived Hymenoptera is often facilitated ...

Abstract	Hymenoptera show a great variation in reproductive potential and nesting behavior, from thousands of eggs in sawflies to just a dozen in nest-provisioning wasps. Reduction in reproductive potential in evolutionary derived Hymenoptera is often facilitated by advanced behavioral mechanisms and nesting strategies. Here we describe a surprising nesting behavior that was previously unknown in the entire animal kingdom: the use of a vestibular cell filled with dead ants in a new spider wasp (Hymenoptera: Pompilidae) species collected with trap nests in South-East China. We scientifically describe the 'Bone-house Wasp' as Deuteragenia ossarium sp. nov., named after graveyard bone-houses or ossuaries. We show that D. ossarium nests are less vulnerable to natural enemies than nests of other sympatric trap-nesting wasps, suggesting an effective nest protection strategy, most likely by utilizing chemical cues emanating from the dead ants.
Keywords	Medicine ; R ; Science ; Q
Subject code	590
Language	English
Publishing date	2014-01-01T00:00:00Z
Publisher	Public Library of Science (PLoS)
Document type	Article ; Online
Database	BASE - Bielefeld Academic Search Engine (life sciences selection)

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