LIVIVO - Search results -

Search results

Result 1 - 10 of total 168

Search options

Book ; Online: Phylogenomic, Biogeographic, and Evolutionary Research Trends in Arachnology

Kuntner, Matjaž

2022

Keywords	Research & information: general ; Biology, life sciences ; Microbiology (non-medical) ; BioGeoBEARS ; Caatinga ; dispersal ; Galapagos ; Neotropical ; speciation ; spiders ; tropical dry forests ; vicariance ; coin spider ; Nephilidae ; phylogenomics ; biogeography ; dispersal probability ; Arthropoda ; circular reasoning ; investigator bias ; paleontology ; Arachnida ; tissue ; X-rays ; micro-CT ; cerebrum ; nervous system ; neuroanatomy ; imaging ; Araneae ; biodiversity ; community ecology ; elevation ; Pantepui ; species turnover ; Tetragnatha ; dynamic disperser ; intermediate dispersal model of biogeography ; GAARlandia ; Tetragnathidae ; taxonomy ; taxonomic crisis ; species concepts ; data management ; monographic research ; molecular phylogeny ; divergence time ; relict group ; Linyphiidae ; phylogeny ; Caribbean biogeography ; arachnid ; araneae ; Micrathena ; long distance dispersal ; distribution ; diversity ; Salticidae ; target sequencing ; reduced representation sequencing (RRS) ; spider phylogenomics ; deep phylogeny ; molecular dating ; ancestral range analysis ; endemics ; founder-event ; intermediate dispersal model ; n/a
Language	0\|e
Size	1 electronic resource (256 pages)
Publisher	MDPI - Multidisciplinary Digital Publishing Institute
Publishing place	Basel
Document type	Book ; Online
Note	English ; Open Access
HBZ-ID	HT021610511
ISBN	9783036541662 ; 3036541667
Database	ZB MED Catalogue: Medicine, Health, Nutrition, Environment, Agriculture

Order via subito

This service is chargeable due to the Delivery terms set by subito. Orders including an article and supplementary material will be classified as separate orders. In these cases, fees will be demanded for each order.

Inter-library loan at ZB MED

Your chosen title can be delivered directly to ZB MED Cologne location if you are registered as a user at ZB MED Cologne.

Article ; Online: Discovering unknown Madagascar biodiversity: integrative taxonomy of raft spiders (Pisauridae:

Yu, Kuang-Ping / Kuntner, Matjaž

PeerJ

2024 Volume 12, Page(s) e16781

Abstract: Madagascar is a global biodiversity hotspot, but its biodiversity continues to be underestimated and understudied. Of raft spiders, ... ...

Abstract	Madagascar is a global biodiversity hotspot, but its biodiversity continues to be underestimated and understudied. Of raft spiders, genus
MeSH term(s)	Animals ; Female ; Male ; Biodiversity ; Madagascar ; Spiders/genetics
Language	English
Publishing date	2024-02-27
Publishing country	United States
Document type	Journal Article
ZDB-ID	2703241-3
ISSN	2167-8359 ; 2167-8359
ISSN (online)	2167-8359
ISSN	2167-8359
DOI	10.7717/peerj.16781
Database	MEDical Literature Analysis and Retrieval System OnLINE

Order via subito

Article ; Online: Phylogenomic, Biogeographic, and Evolutionary Research Trends in Arachnology

Matjaž Kuntner

Diversity, Vol 14, Iss 347, p

2022 Volume 347

Abstract: Textbook knowledge tells us that arachnids are a hyper diverse clade of chelicerates that have taken on terrestrial lifestyles [.] ...

Abstract	Textbook knowledge tells us that arachnids are a hyper diverse clade of chelicerates that have taken on terrestrial lifestyles [.]
Keywords	n/a ; Biology (General) ; QH301-705.5
Language	English
Publishing date	2022-04-01T00:00:00Z
Publisher	MDPI AG
Document type	Article ; Online
Database	BASE - Bielefeld Academic Search Engine (life sciences selection)

Full text online

Full text

Inter-library loan at ZB MED

Your chosen title can be delivered directly to ZB MED Cologne location if you are registered as a user at ZB MED Cologne.

Article ; Online: Jumping spider invades an orb web to prey on a resident male

Kuntner, Matjaž / Kuntner, Eva / Kuntner, Maj / Kuntner, Irena / Li, Daiqin

Ecosphere. 2023 July, v. 14, no. 7 p.e4595-

2023

Abstract: While surveying operational sex ratios of the giant golden orb weaver Nephila pilipes (Fabricius, 1793) in Singapore, we documented a stunning case of predatory behavior of a jumping spider Viciria pavesii Thorell, 1877. A female V. pavesii invaded a N. ... ...

Abstract	While surveying operational sex ratios of the giant golden orb weaver Nephila pilipes (Fabricius, 1793) in Singapore, we documented a stunning case of predatory behavior of a jumping spider Viciria pavesii Thorell, 1877. A female V. pavesii invaded a N. pilipes orb web that was occupied by the resident female and four males, and successfully captured, killed, and removed one of the Nephila males. Whether araneophagy in V. pavesii is opportunistic or a predatory ritual remains to be tested more precisely, but because the observed predatory event triggered an aggressive response by the N. pilipes alpha male, it is plausible that V. pavesii may engage in aggressive mimicry. We place our observation into the context of jumping spider cognition and behavioral tactics that are so far well understood only in a few spartaeine genera, notably Portia Karsch, 1878. Viciria Thorell, 1877, we argue, is another such jumping spider taxon worthy of behavioral scrutiny.
Keywords	Nephila pilipes ; Portia ; Singapore ; cognition ; females ; males ; predation ; spiders
Language	English
Dates of publication	2023-07
Publishing place	John Wiley & Sons, Inc.
Document type	Article ; Online
Note	JOURNAL ARTICLE
ZDB-ID	2572257-8
ISSN	2150-8925
ISSN	2150-8925
DOI	10.1002/ecs2.4595
Database	NAL-Catalogue (AGRICOLA)

Order via subito

Article ; Online: Sex-specific trait architecture in a spider with sexual size dimorphism.

Kralj-Fišer, Simona / Kuntner, Matjaž / Debes, Paul Vincent

Journal of evolutionary biology

2023 Volume 36, Issue 10, Page(s) 1428–1437

Abstract: Sexual dimorphism, or sex-specific trait expression, may evolve when selection favours different optima for the same trait between sexes, that is, under antagonistic selection. Intra-locus sexual conflict exists when the sexually dimorphic trait under ... ...

Abstract	Sexual dimorphism, or sex-specific trait expression, may evolve when selection favours different optima for the same trait between sexes, that is, under antagonistic selection. Intra-locus sexual conflict exists when the sexually dimorphic trait under antagonistic selection is based on genes shared between sexes. A common assumption is that the presence of sexual-size dimorphism (SSD) indicates that sexual conflict has been, at least partly, resolved via decoupling of the trait architecture between sexes. However, whether and how decoupling of the trait architecture between sexes has been realized often remains unknown. We tested for differences in architecture of adult body size between sexes in a species with extreme SSD, the African hermit spider (Nephilingis cruentata), where adult female body size greatly exceeds that of males. Specifically, we estimated the sex-specific importance of genetic and maternal effects on adult body size among individuals that we laboratory-reared for up to eight generations. Quantitative genetic model estimates indicated that size variation in females is to a larger extent explained by direct genetic effects than by maternal effects, but in males to a larger extent by maternal than by genetic effects. We conclude that this sex-specific body-size architecture enables body-size evolution to proceed much more independently than under a common architecture to both sexes.
Language	English
Publishing date	2023-09-13
Publishing country	Switzerland
Document type	Journal Article
ZDB-ID	1465318-7
ISSN	1420-9101 ; 1010-061X
ISSN (online)	1420-9101
ISSN	1010-061X
DOI	10.1111/jeb.14217
Database	MEDical Literature Analysis and Retrieval System OnLINE

Full text online

Accessible to users with ZB MED library card

Order via subito

Details ▾
- Full text online
- Order with fees

Article ; Online: A spider mating plug functions to protect sperm.

Jiang, He / Zhan, Yongjia / Wu, Qingqing / Zhang, Huitao / Kuntner, Matjaž / Tu, Lihong

PloS one

2024 Volume 19, Issue 3, Page(s) e0301290

Abstract: Mating plugs in animals are ubiquitous and are commonly interpreted to be products of mating strategies. In spiders, however, mating plugs may also take on functions beyond female remating prevention. Due to the vagaries of female genital (spermathecal) ... ...

Abstract	Mating plugs in animals are ubiquitous and are commonly interpreted to be products of mating strategies. In spiders, however, mating plugs may also take on functions beyond female remating prevention. Due to the vagaries of female genital (spermathecal) anatomy, most spiders face the problem of having to secure additional, non-anatomical, protection for transferred sperm. Here, we test the hypothesis that mating plugs, rather than (or in addition to) being adaptations for mating strategies, may serve as sperm protection mechanism. Based on a comparative study on 411 epigyna sampled from 36 families, 187 genera, 330 species of entelegyne spiders, our results confirm the necessity of a sperm protection mechanism. We divided the entelegyne spermathecae into four types: SEG, SED, SCG and SCD. We also studied detailed morphology of epigynal tracts in the spider Diphya wulingensis having the SEG type spermathecae, using 3D-reconstruction based on semi thin histological series section. In this species, we hypothesize that two distinct types of mating plug, the sperm plug and the secretion plug, serve different functions. Morphological details support this: sperm plugs are formed on a modified spermathecal wall by the spilled sperm, and function as a temporary protection mechanism to prevent sperm from leaking and desiccating, while secretion plugs function in postcopulation both as a permanent protection mechanism, and to prevent additional mating. Furthermore, with the modified spermathecal wall of S2 stalk, the problem of shunt of sperm input and output, and the possibility of female multiple mating have been resolved. Variation in spermathecal morphology also suggests that the problem of sperm protection might be resolved in different ways in spiders. Considering mating plugs of varying shapes and origins in the vast morphospace of spiders, we conclude that mating plugs might serve different purposes that relate both to mating strategies, as well as to sperm protection.
MeSH term(s)	Humans ; Animals ; Male ; Female ; Sexual Behavior, Animal ; Spiders/anatomy & histology ; Semen ; Reproduction ; Spermatozoa
Language	English
Publishing date	2024-03-29
Publishing country	United States
Document type	Journal Article
ZDB-ID	2267670-3
ISSN	1932-6203 ; 1932-6203
ISSN (online)	1932-6203
ISSN	1932-6203
DOI	10.1371/journal.pone.0301290
Database	MEDical Literature Analysis and Retrieval System OnLINE

Order via subito

Article ; Online: Exploring diversification drivers in golden orbweavers.

Turk, Eva / Kralj-Fišer, Simona / Kuntner, Matjaž

Scientific reports

2021 Volume 11, Issue 1, Page(s) 9248

Abstract: Heterogeneity in species diversity is driven by the dynamics of speciation and extinction, potentially influenced by organismal and environmental factors. Here, we explore macroevolutionary trends on a phylogeny of golden orbweavers (spider family ... ...

Abstract	Heterogeneity in species diversity is driven by the dynamics of speciation and extinction, potentially influenced by organismal and environmental factors. Here, we explore macroevolutionary trends on a phylogeny of golden orbweavers (spider family Nephilidae). Our initial inference detects heterogeneity in speciation and extinction, with accelerated extinction rates in the extremely sexually size dimorphic Nephila and accelerated speciation in Herennia, a lineage defined by highly derived, arboricolous webs, and pronounced island endemism. We evaluate potential drivers of this heterogeneity that relate to organisms and their environment. Primarily, we test two continuous organismal factors for correlation with diversification in nephilids: phenotypic extremeness (female and male body length, and sexual size dimorphism as their ratio) and dispersal propensity (through range sizes as a proxy). We predict a bell-shaped relationship between factor values and speciation, with intermediate phenotypes exhibiting highest diversification rates. Analyses using SSE-class models fail to support our two predictions, suggesting that phenotypic extremeness and dispersal propensity cannot explain patterns of nephilid diversification. Furthermore, two environmental factors (tropical versus subtropical and island versus continental species distribution) indicate only marginal support for higher speciation in the tropics. Although our results may be affected by methodological limitations imposed by a relatively small phylogeny, it seems that the tested organismal and environmental factors play little to no role in nephilid diversification. In the phylogeny of golden orbweavers, the recent hypothesis of universal diversification dynamics may be the simplest explanation of macroevolutionary patterns.
MeSH term(s)	Animals ; Biodiversity ; Biological Evolution ; Body Size ; Extinction, Biological ; Genetic Speciation ; Phylogeny ; Sex Characteristics ; Spiders/genetics ; Spiders/physiology
Language	English
Publishing date	2021-04-29
Publishing country	England
Document type	Journal Article ; Research Support, Non-U.S. Gov't
ZDB-ID	2615211-3
ISSN	2045-2322 ; 2045-2322
ISSN (online)	2045-2322
ISSN	2045-2322
DOI	10.1038/s41598-021-88555-3
Database	MEDical Literature Analysis and Retrieval System OnLINE

Order via subito

Article ; Online: Sexual Size Dimorphism: Evolution and Perils of Extreme Phenotypes in Spiders.

Kuntner, Matjaž / Coddington, Jonathan A

Annual review of entomology

2019 Volume 65, Page(s) 57–80

Abstract: Sexual size dimorphism is one of the most striking animal traits, and among terrestrial animals, it is most extreme in certain spider lineages. The most extreme sexual size dimorphism (eSSD) is female biased. eSSD itself is probably an epiphenomenon of ... ...

Abstract	Sexual size dimorphism is one of the most striking animal traits, and among terrestrial animals, it is most extreme in certain spider lineages. The most extreme sexual size dimorphism (eSSD) is female biased. eSSD itself is probably an epiphenomenon of gendered evolutionary drivers whose strengths and directions are diverse. We demonstrate that eSSD spider clades are aberrant by sampling randomly across all spiders to establish overall averages for female (6.9 mm) and male (5.6 mm) size. At least 16 spider eSSD clades exist. We explore why the literature does not converge on an overall explanation for eSSD and propose an equilibrium model featuring clade- and context-specific drivers of gender size variation. eSSD affects other traits such as sexual cannibalism, genital damage, emasculation, and monogyny with terminal investment. Coevolution with these extreme sexual phenotypes is termed eSSD mating syndrome. Finally, as costs of female gigantism increase with size, eSSD may represent an evolutionary dead end.
MeSH term(s)	Animals ; Biological Evolution ; Body Size ; Phenotype ; Phylogeny ; Sex Characteristics ; Sexual Behavior, Animal ; Spiders
Language	English
Publishing date	2019-10-01
Publishing country	United States
Document type	Journal Article ; Research Support, Non-U.S. Gov't ; Review
ZDB-ID	207927-6
ISSN	1545-4487 ; 0066-4170
ISSN (online)	1545-4487
ISSN	0066-4170
DOI	10.1146/annurev-ento-011019-025032
Database	MEDical Literature Analysis and Retrieval System OnLINE

In stock of ZB MED Cologne/Königswinter

Se 1404: Show issues

Location:
Je nach Verfügbarkeit (siehe Angabe bei Bestand)
bis Jg. 2021: Bestellungen von Artikeln über das Online-Bestellformular
ab Jg. 2022: Lesesaal (EG)

Order via subito

Details ▾
- See ZB MED holdings
- Order with fees

Article ; Online: The new Australian leaf-curling orb-weaving spider genus Leviana (Araneae, Araneidae)

Framenau, Volker W. / Kuntner, Matjaž

Evolutionary Systematics. 2022 July 13, v. 6, no. 2 p.103-133

2022

Abstract: AbstractThe new Australian orb-weaving spider genus Leviana gen. nov. is described to include five species, all known from both sexes: Leviana dimidiata (L. Koch, 1871) comb. nov. (type species) (= Epeira sylvicola Rainbow, 1897 syn. nov.), L. ... ...

Abstract	AbstractThe new Australian orb-weaving spider genus Leviana gen. nov. is described to include five species, all known from both sexes: Leviana dimidiata (L. Koch, 1871) comb. nov. (type species) (= Epeira sylvicola Rainbow, 1897 syn. nov.), L. cincinnata sp. nov., L. folium sp. nov., L. minima sp. nov. and L. mulieraria (Keyserling, 1887) comb. nov. Male pedipalp morphology, specifically the presence of a single patella spine and the median apophysis forming an arch over the radix, place Leviana gen. nov. in the informal Australian ‘backobourkiine’ clade; however, the genus differs from all other genera of this group by the presence of a spine inside the basal median apophysis arch of the male pedipalp, an epigyne that is wider than long with a scape that is approximately as long as the epigyne (but often broken off) and a lack of humeral humps on the elongate ovoid abdomen. In addition, unlike any other backobourkiine, Leviana gen. nov. incorporate a rolled leaf as retreat into the periphery of their web. Leviana gen. nov. species exhibit only a moderate sexual size dimorphism with female to male ratios between 1.3 and 1.7. Leviana gen. nov. occurs in eastern Australia from northern Queensland in the north to Victoria in the south, with a single tropical species, L. mulieraria comb. nov., spreading into northern Western Australia.
Keywords	Araneidae ; abdomen ; females ; leaves ; males ; sexual dimorphism ; Queensland ; Western Australia ; Taxonomy ; systematics ; backobourkiines ; new genus ; leaf retreat
Language	English
Dates of publication	2022-0713
Size	p. 103-133.
Publishing place	Pensoft Publishers
Document type	Article ; Online
ISSN	2535-0730
DOI	10.3897/evolsyst.6.83573
Database	NAL-Catalogue (AGRICOLA)

Order via subito

Inter-library loan at ZB MED

Your chosen title can be delivered directly to ZB MED Cologne location if you are registered as a user at ZB MED Cologne.

Article ; Online: Machine learning approaches identify male body size as the most accurate predictor of species richness.

Čandek, Klemen / Pristovšek Čandek, Urška / Kuntner, Matjaž

BMC biology

2020 Volume 18, Issue 1, Page(s) 105

Abstract: Background: A major challenge in biodiversity science is to understand the factors contributing to the variability of species richness -the number of different species in a community or region - among comparable taxonomic lineages. Multiple biotic and ... ...

Abstract	Background: A major challenge in biodiversity science is to understand the factors contributing to the variability of species richness -the number of different species in a community or region - among comparable taxonomic lineages. Multiple biotic and abiotic factors have been hypothesized to have an effect on species richness and have been used as its predictors, but identifying accurate predictors is not straightforward. Spiders are a highly diverse group, with some 48,000 species in 120 families; yet nearly 75% of all species are found within just the ten most speciose families. Here we use a Random Forest machine learning algorithm to test the predictive power of different variables hypothesized to affect species richness of spider genera. Results: We test the predictive power of 22 variables from spiders' morphological, genetic, geographic, ecological and behavioral landscapes on species richness of 45 genera selected to represent the phylogenetic and biological breath of Araneae. Among the variables, Random Forest analyses find body size (specifically, minimum male body size) to best predict species richness. Multiple Correspondence analysis confirms this outcome through a negative relationship between male body size and species richness. Multiple Correspondence analyses furthermore establish that geographic distribution of congeneric species is positively associated with genus diversity, and that genera from phylogenetically older lineages are species poorer. Of the spider-specific traits, neither the presence of ballooning behavior, nor sexual size dimorphism, can predict species richness. Conclusions: We show that machine learning analyses can be used in deciphering the factors associated with diversity patterns. Since no spider-specific biology could predict species richness, but the biologically universal body size did, we believe these conclusions are worthy of broader biological testing. Future work on other groups of organisms will establish whether the detected associations of species richness with small body size and wide geographic ranges hold more broadly.
MeSH term(s)	Animals ; Biodiversity ; Body Size ; Ecology/methods ; Machine Learning ; Male ; Spiders
Language	English
Publishing date	2020-08-28
Publishing country	England
Document type	Journal Article ; Research Support, Non-U.S. Gov't
ISSN	1741-7007
ISSN (online)	1741-7007
DOI	10.1186/s12915-020-00835-y
Database	MEDical Literature Analysis and Retrieval System OnLINE

Order via subito

Inter-library loan at ZB MED

Your chosen title can be delivered directly to ZB MED Cologne location if you are registered as a user at ZB MED Cologne.

To top

More links

Kategorien

Order via subito

Inter-library loan at ZB MED

More links

Kategorien

Order via subito

Full text online

More links

Kategorien

Inter-library loan at ZB MED

More links

Kategorien

Order via subito

Full text online

More links

Kategorien

Order via subito

More links

Kategorien

Order via subito

More links

Kategorien

Order via subito

More links

Kategorien

In stock of ZB MED Cologne/Königswinter

Order via subito

More links

Kategorien

Order via subito

Inter-library loan at ZB MED

More links

Kategorien

Order via subito

Inter-library loan at ZB MED