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5,053 results for “Arachnidae”
FIGURES 92–96. Chthonius comottii Inzaghi, 1987 in The Italian species of the Chthonius ischnocheles group (Arachnida, Pseudoscorpiones, Chthoniidae), with reference to neighbouring countries
FIGURES 92–96. Chthonius comottii Inzaghi, 1987, detail of chelal fingers dentition at level of trichobothria dx-et (top), it- est/t-st (middle) and b (bottom), antiaxial view (setae and sensilla af1-2, am1-2 omitted). 92, male, Sasso (Bordighera, Imperia); 93, female, Bocc d'la Mocia (Valduggia, Vercelli); 94, female, Chiappi (Castelmagno, Cuneo); 95, female, San Giacomo di Roburent (Cuneo); 96, female, Colle San Maurizio (Cervasca, Cuneo).
FIGURES 84–91. Chthonius comottii Inzaghi, 1987 in The Italian species of the Chthonius ischnocheles group (Arachnida, Pseudoscorpiones, Chthoniidae), with reference to neighbouring countries
FIGURES 84–91. Chthonius comottii Inzaghi, 1987, Baite Sedernello (Colzate, Bergamo). 84, male, right chela, antiaxial view; 85, male, detail of fingers at the chelal tip, antiaxial view; 86, male, detail of fingers at level of trichobothria est-it and st-t, antiaxial view; 87, male, detail of fingers at level of trichobothrium sb, antiaxial view; 88, female, right chela, antiaxial view; 89, female, detail of fingers at the chelal tip, antiaxial view; 90, female, detail of fingers at level of trichobothria est-it and st-t, antiaxial view; 91, female, detail of fingers at level of trichobothrium sb, antiaxial view.
FIGURES 77–83. Chthonius comottii Inzaghi, 1987 in The Italian species of the Chthonius ischnocheles group (Arachnida, Pseudoscorpiones, Chthoniidae), with reference to neighbouring countries
FIGURES 77–83. Chthonius comottii Inzaghi, 1987, Baite Sedernello (Colzate, Bergamo). 77, male, anterior margin of carapace; 78, female, id.; 79, male, carapace; 80, male, right chelicera; 81, female, movable finger of right chelicera; 82, male, right chelal hand, dorsal view; 83, female, id.
FIGURES 60–66. Chthonius carinthiacus Beier, 1951 in The Italian species of the Chthonius ischnocheles group (Arachnida, Pseudoscorpiones, Chthoniidae), with reference to neighbouring countries
FIGURES 60–66. Chthonius carinthiacus Beier, 1951, Rifugio Fonteghi (Imer, Trento) (unless otherwise stated). 60, male, anterior margin of carapace; 61, female, Mt. Gaverdina (Concei, Trento), id.; 62, male, carapace; 63, male, right chelicera; 64, female, Mt. Gaverdina (Concei, Trento), movable finger of right chelicera; 65, male, right chelal hand, dorsal view; 66, female, Mt. Gaverdina (Concei, Trento), id.
FIGURES 97–100. Chthonius densedentatus Beier, 1938 in The Italian species of the Chthonius ischnocheles group (Arachnida, Pseudoscorpiones, Chthoniidae), with reference to neighbouring countries
FIGURES 97–100. Chthonius densedentatus Beier, 1938, male, Omisalj (Krk, Croatia). 97, anterior margin of carapace; 98, carapace; 99, right chelicera; 100, right chelal hand, dorsal view.
FIGURES 110–116. Chthonius densedentatus Beier, 1938 in The Italian species of the Chthonius ischnocheles group (Arachnida, Pseudoscorpiones, Chthoniidae), with reference to neighbouring countries
FIGURES 110–116. Chthonius densedentatus Beier, 1938, Grotta Zinzulusa, 3.IV.2001 (Castro, Lecce) (unless otherwise stated). 110, female, right chela, antiaxial view; 111, female, detail of fingers at the right chelal tip, antiaxial view; 112, female, detail of fingers at level of trichobothria est-it and st-t, antiaxial view; 113, female, detail of fingers at level of trichobothrium sb, antiaxial view; 114, female holotype, detail of dentition at the left chelal fingers tip, antiaxial view (setae and sensilla af1-2, am1-2 omitted); 115, female holotype, detail of fingers at level of trichobothria est-it and st-t, antiaxial view (setae omitted); 116, female holotype, detail of fingers at level of trichobothrium sb, antiaxial view (setae omitted).
FIGURES 101–104. Chthonius densedentatus Beier, 1938 in The Italian species of the Chthonius ischnocheles group (Arachnida, Pseudoscorpiones, Chthoniidae), with reference to neighbouring countries
FIGURES 101–104. Chthonius densedentatus Beier, 1938, male, Omisalj (Krk, Croatia). 101, right chela, antiaxial view; 102, detail of fingers at the chelal tip, antiaxial view; 103, detail of fingers at level of trichobothria est-it and st-t, antiaxial view; 104, detail of fingers at level of trichobothrium sb, antiaxial view.
Data from: Phylogenomic analyses resolve an ancient trichotomy at the base of Ischyropsalidoidea (Arachnida, Opiliones) despite high levels of gene tree conflict and unequal minority resolution frequencies
Phylogenetic resolution of ancient rapid radiations has remained problematic despite major advances in statistical approaches and DNA sequencing technologies. Here we report on a combined phylogenetic approach utilizing transcriptome data in conjunction with Sanger sequence data to investigate a tandem of ancient divergences in the harvestmen superfamily Ischyropsalidoidea (Arachnida, Opiliones, Dyspnoi). We rely on Sanger sequences to resolve nodes within and between closely related genera, and use RNA-seq data from a subset of taxa to resolve a short and ancient internal branch. We use several analytical approaches to explore this succession of ancient diversification events, including concatenated and coalescent-based analyses and maximum likelihood gene trees for each locus. We evaluate the robustness of phylogenetic inferences using a randomized locus sub-sampling approach, and find congruence across these methods despite considerable incongruence across gene trees. Incongruent gene trees are not recovered in frequencies expected from a simple multispecies coalescent model, and we reject incomplete lineage sorting as the sole contributor to gene tree conflict. Using these approaches we attain robust support for higher-level phylogenetic relationships within Ischyropsalidoidea.
Data from: Nuptial gift chemistry reveals convergent evolution correlated with antagonism in mating systems of harvestmen (Arachnida, Opiliones)
Nuptial gifts are material donations given from male to female before or during copulation, and are subject to sexual selection in a wide variety of taxa. The harvestman genus Leiobunum has emerged as a model system for understanding the evolution of reproductive morphology and behavior, as transitions between solicitous and antagonistic modes of courtship have occurred multiple times within the lineage and are correlated with convergence in genital morphology. We analyzed the free amino acid content of nuptial gift secretions from five species of Leiobunum using gas chromatography-mass spectrometry. Multivariate analysis of the free amino acid profiles revealed that, rather than clustering based on phylogenetic relationships, nuptial gift chemical composition was better predicted by genital morphology and behavior, suggesting that convergent evolution has acted on the chemical composition of the nuptial gift. Specifically, species with solicitous courtship produce gifts consisting of a 19% larger proportion of essential amino acids as compared to those with more antagonistic courtship interactions. This work represents the first comparative study of nuptial gift chemistry within a phylogenetic framework in any animal group and as such contributes to our understanding of the evolution of reproductive diversity and the participant role of nuptial gift chemistry in mating system transitions.
Data from: The velvet spiders: an atlas of the Eresidae (Arachnida, Araneae)
The family Eresidae C. L. Koch, 1850 is reviewed at the genus level. The family comprises nine genera including one new genus. They are: Adonea Simon, 1873, Dorceus C. L. Koch, 1846, Dresserus Simon, 1876, Eresus Walckenaer, 1805, Gandanameno Lehtinen, 1967, Loureedia gen. n., Paradonea Lawrence, 1968, Seothyra Purcell, 1903, and Stegodyphus Simon, 1873. A key to all genera and major lineages is provided along with corresponding diagnoses, as well as descriptions of selected species. These are documented with collections of photographs, scanning electron micrographs, and illustrations. A new phylogeny of Eresidae based on molecular sequence data expands on a previously published analysis. A species of the genus Paradonea Lawrence, 1968 is sequenced and placed phylogenetically for the first time. New sequences from twenty Gandanameno Lehtinen, 1967 specimens were added to investigate species limits within the genus. The genus Loureedia gen. n. is proposed to accommodate Eresus annulipes Lucas, 1857. Two species, Eresus semicanus Simon, 1908 and Eresus jerbae El-Hennawy, 2005, are synonymized with Loureedia annulipes comb. n. One new species, Paradonea presleyi sp. n. is described. Eresus algericus El-Hennawy, 2004 is transferred to Adonea Simon, 1873. The female of Dorceus fastuosus C. L. Koch, 1846 is described for the first time. The first figures depicting Paradonea splendens (Lawrence, 1936) are presented.
Figure 5 in A survey of spider taxa new to Israel (Arachnida: Araneae)
Figure 5. Habitus and epigyne of Neon rayi from Turkey. – a. female habitus, dorsal; b. epigyne, ventral; c‒d. male habitus, dorsal and lateral.
Figure 4 in A survey of spider taxa new to Israel (Arachnida: Araneae)
Figure 4. Female of Phyxelida anatolica. – a. habitus, lateral; b. abdomen, ventral. Scale = 0.2 mm if not otherwise indicated.
Figure 3. Aulonia kratochvili from Azerbaijan. – a in A survey of spider taxa new to Israel (Arachnida: Araneae)
Figure 3. Aulonia kratochvili from Azerbaijan. – a. male palp, ventral; b. bulbus, anterior; c. epigyne, ventral. Scale = 0.1 mm.
Figure 1 in A survey of spider taxa new to Israel (Arachnida: Araneae)
Figure 1. Female of Maculoncus parvipalpus (a‒d) and expanded male palp of Ero flammeola (e‒g). – a. habitus, lateral; b. prosoma, anterior; c. abdomen, dorsal; d. epigyne, ventral; e. dorsal; f. lateral; g. ventral. Scale = 0.2 mm if not otherwise indicated.
Figs. 93-97. 93-95 in Spiders from Laos with descriptions of new species (Arachnida: Araneae)
Figs. 93-97. 93-95 Pseudopoda houaphan spec. nov. Female holotype from Muong You (L16). 93 Epigynum, ventral view; 94 internal duct system, dorsal view; 95 schematic course of internal duct system, dorsal view. 96-97. Rhitymna plana Jäger 2003. Female from Muong You (L16). 96 Epigynum, ventral view; 97 internal duct system, dorsal view, ab — anterior bands of epigynal field.
Figs. 39-45. 39-42 in Spiders from Laos with descriptions of new species (Arachnida: Araneae)
Figs. 39-45. 39-42 Polyboea sp. cf. zonaformis Zhang, Zhu & Song 2004 from Muang Sing (L3). 39-40 Epigynum, ventral view (variation); 41 internal duct system, dorsal view; 42 schematic course of internal duct system, dorsal view; 43 female carrying egg-sac (in original habitat). 44-46 Thalassius sp. cf. paralbocinctus Zhang, Zhu & Song 2004 from Vang Vieng (L23). 44 Epigynum, ventral view; 45 internal duct system, dorsal view (left side partly broken off); 46 female (in original habitat, in foliage about 1 m above ground), ab — accessory bulb, am — anterior margin of lateral lobe, ca — carina, fo — fossa (pits on carina), hs — head of spermathecae, ss — slit sense
Fig. 92 in Spiders from Laos with descriptions of new species (Arachnida: Araneae)
Fig. 92. Storenomorpha anne spec. nov. Male from Phou Si, Luang Prabang, habitus (in original habitat).
Figs. 83 in Spiders from Laos with descriptions of new species (Arachnida: Araneae)
Figs. 83~91. Storenomorpha anne spec. nov. Male holotype (83-86) and female paratype (87—91) from Phou Si (L10). 83-85 Male pedipalpus (83 ventral, 84 retrolateral, 85 dorsal view); 86 eye arrangement, dorsal view; 87 epigynum, ventral view; 88 internal duct system, dorsal view; 89 schematic course of internal duct system, dorsal view; 90 pre-epigynum, ventral view, c — conductor, ms — median septum, ta — tegular apophysis.
Figs. 26- 34. Eurychoera quadrimaculata Thorell 1897 in Spiders from Laos with descriptions of new species (Arachnida: Araneae)
Figs. 26- 34. Eurychoera quadrimaculata Thorell 1897. Male (26-28) and females (29-34) from Singapore (26-29: Mac Ritchie Reservoir; 30: Peirce Reservoir; 31-33, 34: syntypes, not specified). 26-27 male pedipalpus (26 ventral, 27 retrolateral view); 28 eye arrangement, dorsal view; 29-30, 31-32, 34 epigynum (29-30, 31, 34 ventral view, 32 posterior view); 33 internal duct system, dorsal view, da — distal apophysis, e — embolus.
Figs.16-17. Caerostris sumatrana Strand 1915 in Spiders from Laos with descriptions of new species (Arachnida: Araneae)
Figs.16-17. Caerostris sumatrana Strand 1915. Male (16) from Nam Ha (L3), female (17) from Muang Sing (L1), feeding (in original habitat).
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Allen Brain Atlas
Allen Brain Atlas is an Allen Institute collection of brain map atlases, datasets, APIs, and analysis tools covering mouse, human, and non-human primate brain resources.
Annotated Behaviour and Observability Dataset (ABODe)
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DANDI Archive for NWB datasets
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International Brain Laboratory public data
The International Brain Laboratory public data releases expose standardized mouse decision-making experiments, including Neuropixels recordings, widefield calcium imaging, behavior, and session metadata accessed through the ONE API.
OpenNeuro
OpenNeuro is a free, open platform for sharing neuroimaging datasets, with public search, dataset pages, and download paths for web, S3, DataLad, and the OpenNeuro CLI.