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17,475 results for “taxonomic revision”
Data from: Taxonomic revision of the trapdoor spider genus Eucteniza ausserer (Araneae: Mygalomorphae: Euctenizidae)
The mygalomorph spider genus Eucteniza Ausserer, 1875 comprises 15 nominal species known only from the southwestern United States (Texas) and Mexico (Northern, Central, and the Baja Peninsula). Eucteniza atoyacensis Bond and Opell, 2002 is considered a nomen dubium; E. rex (Chamberlin, 1940) and E. stolida (Gertsch and Mulaik, 1940) are both considered junior synonyms of E. relata (O.P.-Cambridge, 1895). Twelve new species are described: E. caprica, E. coylei, E. diablo, E. cabowabo, E. huasteca, E. zapatista, E. chichimeca, E. ronnewtoni, E. hidalgo, E. golondrina, E. panchovillai, and E. rosalia.
Data from: A taxonomic revision of the African genus Desplatsia Bocq. (Malvaceae - Grewioideae) with identifiers
<p>A taxonomic revision of <i>Desplatsia</i> Bocq. (Malvaceae s.l., subfamily Grewioideae, tribe Grewieae) based on 810 herbarium specimens is presented. <i>Desplatsia</i> is a genus of trees and shrubs found in tropical West and Central Africa and is characterised by subulately divided stipules, the absence of an androgynophore, stamens that are fused to a tube at the base, and large and distinctive fruits that are dispersed by elephants. Four species are recognized (<i>D. subericarpa</i>, <i>D. chrysochlamys</i>, <i>D. dewevrei</i> and <i>D. mildbraedii</i>) and 12 species names are placed into synonymy, two of which have been put into synonymy for the first time: <i>D. floribunda</i> and <i>D. trillesiana</i>. All four species are locally abundant and their conservation status is assessed as Least Concern (LC). A key to the species, full species descriptions, illustrations, a specimen citation list and distribution maps are provided.</p>
Data from: Taxonomic revision of deep-sea Ostracoda from the Arctic Ocean
Taxonomic revision of deep-sea Ostracoda from the Arctic Ocean was conducted to reduce taxonomic uncertainty that will improve our understanding of species'ecology, biogeography and relationship to faunas from other deep-sea regions. Fifteen genera and 40 species were examined and (re-)illustrated with high-resolution scanning electron microscopy images, covering most of known deep-sea species in the central Arctic Ocean. Seven new species are described: Bythoceratina lomonosovensis n. sp., Cytheropteron parahamatum n. sp.,Cytheropteron lanceae n. sp.,Cytheropteron irizukii n. sp., Pedicythere arctica n. sp.,Cluthia whatleyi n. sp.,Krithe hunti n. sp. This study provides a robust taxonomic baseline for application to paleoceanographical reconstruction and biodiversity analyses in this climatically sensitive region.
Data from: Taxonomic revision of the Malagasy Camponotus grandidieri and niveosetosus species groups (Hymenoptera, Formicidae) using qualitative and quantitative morphology
The Camponotus grandidieri species group and Camponotus niveosetosus species group of the Malagasy region are revised. Species delimitation was inferred from the evidence of both qualitative morphological analysis and multivariate morphometry. The multivariate method combined the Nest Centroid (NC)-clustering method and Partitioning Algorithm based on Recursive Thresholding (PART) function to generate hypotheses about species boundaries (clusters) based on 19 continuous morphological traits of minor workers. The proposed species hypotheses were tested by cumulative cross-validated Linear Discriminant Analysis (LOOCV-LDA) and Principal Component Analysis in a shape space (shape PCA). Morphometric ratios for the subsets of minor and major workers were used in species descriptions and redefinitions. Here, eight species are recognized, of which three are newly described and five are redescribed. Four species belong to the Camponotus grandidieri species group: auropubens Forel, efitra n. sp., grandidieri Forel, and maintikibo n. sp.; and four species belong to the Camponotus niveosetosus species group: descarpentriesi Santschi, madagascarensis Forel stat. rev., mita n. sp., and voeltzkowii Forel. Camponotus auropubens aldabrensis Forel and C. olivieri freyeri Santschi are synonymized under C. auropubens. Camponotus grandidieri atrabilis Santschi and C. grandidieri comorensis Santschi are synonymized under C. grandidieri. Illustrated species identification keys for both minor and major castes, taxonomic discussions, images, and distribution maps for each species superimposed on the ecoregions of Madagascar are also provided.
Data from: Phylogenetic treatment and taxonomic revision of the trapdoor spider genus Aptostichus Simon (Araneae, Mygalomorphae, Euctenizidae)
This systematic study documents the taxonomy, diversity, and distribution of 40 species of the predominately Californian trapdoor spider genus Aptostichus Simon, 1891. Thirty-three of these species are newly described: Aptostichus dantrippi, Aptostichus cabrillo, Aptostichus pennjillettei, Aptostichus asmodaeus, Aptostichus nateevansi, Aptostichus chiricahua, Aptostichus icenoglei, Aptostichus isabella, Aptostichus muiri, Aptostichus barackobamai, Aptostichus sinnombre, Aptostichus hedinorum, Aptostichus aguacaliente, Aptostichus chemehuevi, Aptostichus sarlacc, Aptostichus derhamgiulianii, Aptostichus anzaborrego, Aptostichus serrano, Aptostichus mikeradtkei, Aptostichus edwardabbeyi, Aptostichus killerdana, Aptostichus cahuilla, Aptostichus satleri, Aptostichus elisabethae, Aptostichus fornax, Aptostichus lucerne, Aptostichus fisheri, Aptostichus bonoi, Aptostichus cajalco, Aptostichus sierra, Aptostichus huntington, Aptostichus dorothealangeae, and Aptostichus chavezi. Most of these species are restricted to the California Floristic Province, a known biodiversity hotspot. Of the 40 recognized species, over half are considered to be imperiled or vulnerable and two have likely gone extinct over the past half-century; the conservation status of only 11 species is considered to be secure. Using 73 quantitative and qualitative morphological characters I propose a preliminary phylogeny for the genus that recognizes four major lineages: the Atomarius, Simus, Hesperus, and Sierra species groups. Additionally, the phylogenetic analysis indicates that adaptations favoring the invasion of the arid desert habitats of southern California have evolved multiple times across the group. The existence of both desert and non - desert species in three of the four species groups makes this genus an ideal candidate for the study of the evolutionary ecology of desert arthropods. A set of molecular characters based on the contiguous mitochondrial DNA genes 16S-tRNA valine-12S is used in an independent analysis to assist in placement of specimens into species. The taxonomy section explicitly identifies the concept employed in species delimitation. Niche based distribution models are constructed to predict the ranges of species for which an adequate number of sampling sites were known.
Data from: Taxonomic revision of Stigmatomma Roger (Hymenoptera: Formicidae) in the Malagasy region
In this study we present the first taxonomic revision of the ant genus Stigmatomma in the Malagasy biogeographic region, redescribe the previously known S. besucheti Baroni-Urbani, and describe seven new species to science (S. bolabola sp. n., S. irayhady sp. n., S. janovitsika sp. n., S. liebe sp. n., S. roahady sp. n., S. sakalava sp. n., and S. tsyhady sp. n.). The revision is based on the worker caste, but we provide brief descriptions of gynes and males for some species. Species descriptions, diagnosis, character discussion, identification key, and glossary are illustrated with 360 high-quality montage and SEM images. The distribution of Stigmatomma species in Madagascar are mapped and discussed within the context of the island's biomes and ecoregions. We also discuss how some morphometric variables describe the differences among the species in the bioregion. Open science is supported by providing access to R scripts, raw measurement data, and all specimen data used. All specimens used in this study were given unique identifies, and holotypes were imaged. Specimens and images are made accessible on AntWeb.org.
Data from: Taxonomic revision of genus Ablattaria Reitter (Coleoptera, Silphidae) employing geometric morphometrics
The genus Ablattaria Reitter, 1884 (Coleoptera: Silphidae: Silphinae) is revised. Four taxa are recognized as valid species: Ablattaria arenaria (Kraatz, 1876), A. cribrata (Ménétries, 1832), A. laevigata (Fabricius, 1775) and A. subtriangula Reitter, 1905. Ablattaria laevigata var. meridionalis Ganglbauer, 1899 is newly treated as a junior subjective synonym of A. laevigata. Lectotypes are designated for Phosphuga arenaria Kraatz, 1876, Ablattaria arenaria var. punctigera Reitter, 1884, Ablattaria arenaria var. alleoni Portevin, 1926, Silpha cribrata Ménétries, 1832, Silpha laevigata Fabricius, 1775, Silpha gibba Brullé, 1832, Ablattaria gibba var. costulata Portevin, 1926, Ablattaria gibba var. distinguenda Portevin, 1926, Ablattaria gibba var. punctata Portevin, 1926 and Ablattaria subtriangula Reitter, 1905. The distribution of all taxa is mapped, based on material examined. Geometric morphometric methods were used to evaluate shape variability in Ablattaria. Results indicated sexual dimorphism in all species. Shape inconsistency was found between the sexes of all taxa when tested independently. The first two relative warp axes indicated 65.17% shape variation in males and 65.72% in females. Canonical variate analysis separated the taxa studied. There was minimal overlap between some groups in both sexes. Differences in body shape between populations of A. laevigata from Central Europe, Italy and Greece + Turkey were also examined. Relative warps implied 58.01% shape variability on both axes in males and 64.78% in females. CVA revealed noticeable overlaps between the groups, although the Italian population demonstrated a higher separation in both sexes.
Data from: A taxonomic revision of Schlechteranthus subgenus microphyllus (Ruschieae; Aizoaceae)
Schlechteranthus subgenus Microphyllus is a recently erected subgenus, which is revised here for the first time. The subgenus is comprised of nine succulent species, including a new species S. parvus, and are endemic to the arid part of the Greater Cape Floristic Region. Schlechteranthus subgenus Microphyllus can be distinguished from subgenus Schlechteranthus by the smaller leaves (3.5-5.0 × 4-6 mm vs. 5-30 × 3.5-9.0 mm) and smaller capsules (2-6 × 2-6 mm vs. 6-11 × 4-9 mm), with seven to nine locules and small closing bodies that block one third of the locule (vs. 10 to 12 locules and closing bodies that block three quarters of the locule). Differences in leaf shape, degree of fusion, and arrangement, as well as inflorescence and spine structure were identified as important characters in distinguishing species in the subgenus. Schlechteranthus parvus, S. pungens, S. spinescens, and S. stylosus all share the presence of spines, caducous bracteoles, and cymose inflorescences. Maps illustrating species richness hotspots within a quarter degree square were produced for the genus and subgenera respectively. A key to the subgenera in Schlechteranthus and a comprehensive taxonomic treatment of subgenus Microphyllus is presented, including a key to the species, descriptions, figures illustrating diagnostic characters and distribution maps.
Data from: Taxonomic and evolutionary pattern revisions resulting from geometric morphometric analysis of Pennsylvanian Neognathodus conodonts, Illinois Basin
Conodont fossils are highly valuable for Paleozoic biostratigraphy and for interpreting evolutionary change, but identifying and describing conodont morphologies, and characterizing gradual shape variation remain challenging. We used geometric morphometrics (GM) to conduct the first landmark-based morphometric analysis of the biostratigraphically useful conodont genus Neognathodus. Our objective is to assess whether previously defined morphotype groups are reliably distinct from one another. As such, we reevaluate patterns of morphologic change in Neognathodus P1elements, perform maximum likelihood tests of evolutionary modes, and construct novel, GM-based biozonations through a Desmoinesian (Middle Pennsylvanian) section in the Illinois Basin. Our GM results record the entire spectrum of shape variability among Neognathodus morphotypes thus alleviating the problem of documenting and classifying gradual morphologic transitions between morphotypes. Statistically distinct GM groups support previously established classifications of N. bassleri, N. bothrops, and N. roundyi. Statistically indistinct pairs of GM groups do not support literature designations of N. medadultimus and N. medexultimus, and N. dilatus and N. metanodosus, and we synonymize each pair. Maximum likelihood tests of evolutionary modes provide the first statistical assessment of Neognathodus evolutionary models in the Desmoinesian. The most likely evolutionary models are an unbiased random walk or a general random walk. We name four distinct biozones through the Desmoinesian using GM results and these align with previous biozonation structure based on the Neognathodus Index (NI) illustrating that Neognathodus-based biostratigraphic correlations would not change between GM or NI methods. The structural similarity between both biozonations showcases that determining GM-based biozones is not redundant, as this comparison validates using landmark-based GM work to construct viable biozonations for subsequent stratigraphic correlations. Although this study is limited to the Illinois Basin, our quantitative methodology can be broadly applied to additional genera to test taxonomic designations, interpret statistically-robust evolutionary patterns, and construct valid biozones for this significant chordate group.
Figure 5 in A taxonomic revision of the Neotropical genus Scatonomus Erichson, 1835 (Coleoptera: Scarabaeidae: Scarabaeinae)
Figure 5. Aedeagus, detail of right paramera and endophallic sclerites. (a) Scatonomus barbatus stat. rev.; (b) S. chalybaeus; (c) S. fasciculatus; (d) S. foresti sp. nov.; (e) S. insignis; (f) S. janssensi; (g) S. mitzae sp. nov.; (h) S. thalassinus; (i) S. viridis; (j) endophallic sclerites of S. fasciculatus.
Figure 4 in A taxonomic revision of the Neotropical genus Scatonomus Erichson, 1835 (Coleoptera: Scarabaeidae: Scarabaeinae)
Figure 4. Details of Scatonomus morphology. (a) S. mitzae sp. nov., microgranulated interstrial surface (white arrow indicating the elytral stria); (b) S. janssensi, detail of elytral striae; (c) S. thalassinus, surface of pronotal disc (wrinkles, square); (d) S. mitzae sp. nov., puncticulate pronotal surface (white arrow, a coase puncture; black arrow, a fine puncture); (e) S. janssensi, ocellate punctures on pronotum; (f) S. fasciculatus, striate surface on mesepimeron; (g) S. janssensi, broad and transverse carina at the posterior portion of clypeus (white arrow) and longitudinal carina (black arrow); (h) holotype of S. xanthopygus (synonym of S. chalybaeus), dry body fat partially covering the pygidial disc; (i, j) Abdominal ventrites of S. thalassinus.
Figure 2 in A taxonomic revision of the Neotropical genus Scatonomus Erichson, 1835 (Coleoptera: Scarabaeidae: Scarabaeinae)
Figure 2. Terminology used to describe the head parts. (a) Scatonomus canhedoae sp. nov.; (b) S. chalybaeus.
Figure 1 in A taxonomic revision of the Neotropical genus Scatonomus Erichson, 1835 (Coleoptera: Scarabaeidae: Scarabaeinae)
Figure 1. Dorsal habitus. (a) S Scatonomus barbatus stat. rev.; (b) S. canhedoae sp. nov.; (holotype); (c) S. chalybaeus; (d) S. fasciculatus; (e) S. foresti sp. nov. (holotype); (f) S. insignis; (g) S. janssensi; (h) S. mitzae sp. nov. (holotype); (i) S. paulosawayai (holotype); (j, k) S. thalassinus; (l) S. viridis.
Figure 3 in A taxonomic revision of the Neotropical genus Scatonomus Erichson, 1835 (Coleoptera: Scarabaeidae: Scarabaeinae)
Figure 3. Head, dorsal view. (a) Scatonomus barbatus stat. rev.; (b) S. canhedoae sp. nov. (holotype); (c) S. chalybaeus; (d) S. fasciculatus; (e) S. foresti sp. nov. (holotype); (f) S. insignis; (g) S. janssensi; (h) S. mitzae sp. nov. (holotype); (i) S. paulosawayai (holotype); (j, k) S. thalassinus; (l) S. viridis.
FIGURES 3542. 3539. Selenops lesnei Lessert, 35 in A taxonomic revision of the afrotropical species of Selenops Latreille, 1819 (Araneae, Selenopidae)
FIGURES 3542. 3539. Selenops lesnei Lessert, 35. Colour pattern of opisthosoma, dorsal view. Fig 36. Male palp, ventral view. 37. Male palp, lateral view. 38. Epigynum, ventral view. 39. Vulva, dorsal view. 4042. Selenops krugeri Lawrence, female lectotype, 40. Epigynum, ventral view. 41. Vulva, dorsal view. 42. Colour pattern of opisthosoma, dorsal view. Scale: genitalia=0.25mm, other drawings=1mm.
FIGURES 8487. Selenops zuluanus Lawrence, 84 in A taxonomic revision of the afrotropical species of Selenops Latreille, 1819 (Araneae, Selenopidae)
FIGURES 8487. Selenops zuluanus Lawrence, 84. Male palp, lateral view, 85. Male palp, ventral view. 86. Epigynum, ventral view. 87. Vulva, dorsal view. Scale: female genitalia=0.25mm, male palp=1mm.
FIGURES 7483. 7478. Selenops vigilans Pocock, Fig 74. Male palp, lateral view. 75. Male palp, ventral view. 76. Epigynum, ventral view. 77. Vulva, dorsal view. 78 in A taxonomic revision of the afrotropical species of Selenops Latreille, 1819 (Araneae, Selenopidae)
FIGURES 7483. 7478. Selenops vigilans Pocock, Fig 74. Male palp, lateral view. 75. Male palp, ventral view. 76. Epigynum, ventral view. 77. Vulva, dorsal view. 78. Colour pattern of opisthosoma, dorsal view. 7980. Selenops viron sp. nov., female holotype, 79. Epigynum, ventral view. 80. Vulva, dorsal view. 8183. Selenops zairensis Benoit, female holotype, 81. Epigynum, ventral view. 82. Vulva, dorsal view. 83. Colour pattern of opisthosoma, dorsal view. Scale: genitalia=0.25mm, other drawings=1mm.
FIGURES 2434. 2426 in A taxonomic revision of the afrotropical species of Selenops Latreille, 1819 (Araneae, Selenopidae)
FIGURES 2434. 2426. Selenops feron sp. nov., female holotype, 24. Colour pattern of opisthosoma, dorsal view. 25. Epigynum, ventral view. 26. Vulva, dorsal view. 2728. Selenops florenciae sp. nov., female holotype, 27. Epigynum, ventral view. 28. Vulva, dorsal view. 2931. Selenops ilcuria sp. nov., female holotype, 29. Epigynum, ventral view. 30. Vulva, dorsal view. 31. Colour pattern of opisthosoma, dorsal view. 3234. Selenops intricatus Simon, 32. Epigynum, ventral view. 33. Vulva, dorsal view. 34. Male palp, ventral view. Scale: genitalia=0.25mm, other drawings=1mm.
FIGURES 5361. 5355 in A taxonomic revision of the afrotropical species of Selenops Latreille, 1819 (Araneae, Selenopidae)
FIGURES 5361. 5355. Selenops lumbo Corronca, male holotype, 53. Colour pattern of opisthosoma, dorsal view. 54. Male palp, ventral view. 55. Male palp, lateral view. 5657. Selenops ovambicus Lawrence, female holotype, 56. Epigynum, ventral view. 57. Vulva, dorsal view. 5861. Selenops pygmaeus Benoit, female holotype and male paratype, 58. Male palp, ventral view. 59. Male palp, lateral view. 60. Epigynum, ventral view. 61. Vulva, dorsal view. Scale: genitalia=0.25mm, other drawings=1mm.
FIGURES 88AF in A taxonomic revision of the afrotropical species of Selenops Latreille, 1819 (Araneae, Selenopidae)
FIGURES 88AF. Selenops radiatus: general morphology. A. Prosoma, dorsal view, B. Opisthosoma, dorsal view, C. Prosoma showing labium, sternum, gnathocoxae, chelicerae and coxae, ventral view, D. Eye arrangement, frontal view, E. Tibia II showing ventral paired spines, ventral view, F. Right chelicera showing dentition, ventral view.
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Allen Brain Atlas
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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.