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352 results for “Thoracica”
Abb. 3 in Beobachtung zur Biologie von Oiceoptoma thoracica (Linnaeus, 1758) (Coleoptera: Silphidae): skelettierte Natter-Leiche in 3 Tagen
Abb. 3. Sternförmiges Verlassen der «Mensa». (Foto Gaston-Denis Guex)
Abb. 2 in Beobachtung zur Biologie von Oiceoptoma thoracica (Linnaeus, 1758) (Coleoptera: Silphidae): skelettierte Natter-Leiche in 3 Tagen
Abb. 2. Sauber skelettiert. (Foto Gaston-Denis Guex)
Data from: Disruptive sexual selection on body size in the polyphenic black scavenger fly Sepsis thoracica
Sexual selection has two main components, female preference and male-male competition, which can lead males to adopt alternative reproductive tactics to optimize their reproductive success. Two traits that significantly influence reproductive success are body size and coloration, as they can facilitate access to females through male contests or as female attractors. We investigated whether, and if so which mechanism of sexual selection contributes to the maintenance, and possibly even the establishment, of two almost discrete male morphs in the polyphenic black scavenger fly Sepsis thoracica (Diptera: Sepsidae): small and black, or large and amber. We performed two complementary laboratory experiments to evaluate the mating success of the different male morphs and the behaviors (of both males and females) presumably mediating their mating success. We found evidence for intraspecific disruptive sexual selection on male body size that is mediated by male-male interactions, and significant positive directional selection on body size that interacted with (directional) selection on coloration, likely contributing to the origin and/or maintenance of the threshold relationship between the two traits in this species. The simultaneous occurrence of disruptive selection and polyphenism in S. thoracica supports the role of sexual selection in the intraspecific diversification of coupled traits (here body size and coloration), which could be a speciation starting point.
Data from: Climatic factors shape plastic trade-offs in the polyphenic black scavenger fly Sepsis thoracica (Diptera: Sepsidae)
Aim: Trade-offs allow individuals to optimize their fitness by tailoring the investment into different traits to variable environmental conditions, such as along geographic gradients. Trade-offs thus can help in adjusting to changing thermal and insolation profiles, especially in small ectotherms, whose body temperature typically follows environmental temperatures closely. Two traits usually involved in latitudinal adaptation are body size and melanism. Since both traits are costly, individuals need to optimize investment into each trait. Here we studied how environmental factors influence this trade-off in the short and long term. Location: Europe Methods: We raised flies from 15 latitudinal populations at three constant temperatures in a laboratory common garden to differentiate plastic and evolutionary responses to temperature. We further analysed how the different insolation components of the populations' habitats influenced the evolution of the trade-off. Results: Male Sepsis thoracica (Diptera: Sepsidae) feature a sigmoid relationship between melanism and body size, defining two strikingly different male morphs: obsidian (small and black) and amber (large and orange). This relationship was altered by the developmental temperature, documenting its plasticity. The relationship further evolved across populations in response to the environmental characteristics of their habitat, notably temperature, insolation and UV radiation, suggesting that plasticity also has an underlying genetic basis. Nevertheless, melanism, but not body size, merely slightly increased with latitude. Main Conclusions: As the plastic and evolutionary responses of the relationship to temperature differed, plasticity does not necessarily follow the direction of evolution of this trade-off, but rather adds to it. Our study evinces the role of several environmental factors in shaping the evolution of a plastic melanism – body size relationship defining a rare male polymorphism in temperate sepsid flies.
FIGURE 8 in Two species of Nemertopsis (Nemertea: Hoplonemertea: Monostilifera) living in association with Capitulum mitella (Crustacea: Cirripedia: Thoracica: Lepadomorpha)
FIGURE 8. Nemertopsis mitellicola sp. nov. Holotype, ZIHU-3204. A, transverse section through stomach, showing general arrangement of internal organs. B, enlargement of A, showing mid-dorsal epidermal furrow.
FIGURE 6 in Two species of Nemertopsis (Nemertea: Hoplonemertea: Monostilifera) living in association with Capitulum mitella (Crustacea: Cirripedia: Thoracica: Lepadomorpha)
FIGURE 6. Schematic diagram of two types of oesophagus-rhynchodaeum configuration in monostiliferous hoplonemerteans. A, Africanemertes type. B, normal type.
FIGURE 3 in Two species of Nemertopsis (Nemertea: Hoplonemertea: Monostilifera) living in association with Capitulum mitella (Crustacea: Cirripedia: Thoracica: Lepadomorpha)
FIGURE 3. Nemertopsis quadripunctata (Quoy & Gaimard, 1833). ZIHU-3207. A, transverse section through just behind brain, showing body-wall, musculature, mid-dorsal epidermal furrow, and mid-dorsal vascular plug; arrowhead indicating strongly acidophilic glandular cell in proximal portion of epidermis. B, transverse section through intestinal region, showing arrangement of testes; arrowhead indicating dorsoventral muscle fibre.
FIGURE 2 in Two species of Nemertopsis (Nemertea: Hoplonemertea: Monostilifera) living in association with Capitulum mitella (Crustacea: Cirripedia: Thoracica: Lepadomorpha)
FIGURE 2. Nemertopsis quadripunctata (Quoy & Gaimard, 1833). A, drawing of complete specimen, showing body shape and dorsal stripes. B, enlargement of head.
FIGURE 1. A–D in Two species of Nemertopsis (Nemertea: Hoplonemertea: Monostilifera) living in association with Capitulum mitella (Crustacea: Cirripedia: Thoracica: Lepadomorpha)
FIGURE 1. A–D, maps showing the sampling locality at increasing enlargements; arrowheads indicate the sampling site, Engetsu Island (modified from ©2006 Google Earth images).
FIGURE 11 in Two species of Nemertopsis (Nemertea: Hoplonemertea: Monostilifera) living in association with Capitulum mitella (Crustacea: Cirripedia: Thoracica: Lepadomorpha)
FIGURE 11. Nemertopsis mitellicola sp. nov. A, holotype, ZIHU-3204, transverse section through intestinal region showing two ova in ovary. B, paratype, ZIHU-3205, transverse section through intestinal region showing testis.
FIGURE 9 in Two species of Nemertopsis (Nemertea: Hoplonemertea: Monostilifera) living in association with Capitulum mitella (Crustacea: Cirripedia: Thoracica: Lepadomorpha)
FIGURE 9. Nemertopsis mitellicola sp. nov. Holotype, ZIHU-3204. A, transverse section through stomach region; black arrowheads show longitudinal muscle fibres from body-wall longitudinal muscle layer traversing through basophilic submuscular glands, white arrowhead indicates muscular bundle from body-wall longitudinal muscle layer. B, transverse section through posterior portion of brain; arrowheads indicating incomplete inner longitudinal muscle layer. C, transverse section through dorsal cerebral commissure; arrowheads indicating incomplete inner longitudinal muscle layer surrounding brain. D, E, transverse sections through proboscis insertion (indicated by arrowheads).
FIGURE 7 in Two species of Nemertopsis (Nemertea: Hoplonemertea: Monostilifera) living in association with Capitulum mitella (Crustacea: Cirripedia: Thoracica: Lepadomorpha)
FIGURE 7. Nemertopsis mitellicola sp. nov. A, drawing of complete specimen. B, enlargement of head viewed dorsally. C, enlargement of head viewed ventrally. D, drawing of central stylet and basis.
FIGURE 2 in Verruca punica, a new species of verrucomorph barnacle (Crustacea, Cirripedia, Thoracica) from the Lower Danian (Palaeocene) of Tunisia
FIGURE 2. Distribution of fossil species assigned to the genus Ver ru ca Schumacher, 1817 (sensu stricto); see Table 1 for details.
FIGURE 1 in Verruca punica, a new species of verrucomorph barnacle (Crustacea, Cirripedia, Thoracica) from the Lower Danian (Palaeocene) of Tunisia
FIGURE 1. Location of the El Haria section, near El Kef (northwest Tunisia), the provenance of the types of Verruca punica Buckeridge & Jagt, sp. nov.
FIGURE 1 in Ashinkailepas kermadecensis, a new species of deep-sea scalpelliform barnacle (Thoracica: Eolepadidae) from the Kermadec Islands, southwest Pacific
FIGURE 1. Ashinkailepas kermadecensis Buckeridge sp. nov. Paratype NIWA-18008 (Plate 1: Figure 1). Capitulum comprising eight approximate, calcareous plates: carina (c), rostrum (r) and paired terga (t), scuta (s) and medial latera (ml); is = imbricating scale of the peduncle; oa = occludent angle of tergum. Note the broadly arched profile of the carina, and on the tergum, the weak longitudinal ridge on the scutal side that extends to a point near the apex of the medial latus.
FIGURE 3 in Ashinkailepas kermadecensis, a new species of deep-sea scalpelliform barnacle (Thoracica: Eolepadidae) from the Kermadec Islands, southwest Pacific
FIGURE 3. Ashinkailepas kermadecensis Buckeridge sp. nov. Appendages (setae not shown). A: Cirrus I; B: Cirrus II; C: Basal segment of cirrus VI, showing short, blunt, uniarticulate caudal appendage at base.
FIGURE 2 in Ashinkailepas kermadecensis, a new species of deep-sea scalpelliform barnacle (Thoracica: Eolepadidae) from the Kermadec Islands, southwest Pacific
FIGURE 2. Ashinkailepas kermadecensis Buckeridge sp. nov. Trophi. A: Left mandible; B: Left second maxilla; C: Labrum with palps (setae not shown).
FIGURE 29. Hexelasma velutinum. A. Maxilla, B. Maxillule, C. Mandible, D. Mandibular palp, E in North West Pacific deep-sea barnacles (Cirripedia, Thoracica) collected by the TAIWAN expeditions, with descriptions of two new species
FIGURE 29. Hexelasma velutinum. A. Maxilla, B. Maxillule, C. Mandible, D. Mandibular palp, E. Lower margin of mandible, F. Labrum, G. First teeth of mandible, H. Cutting edge of mandible, showing fine teeth. Scale bars in µm.
FIGURE 30. Hexelasma velutinum. A. Cirrus I, B. Cirrus II, C. Cirrus III, D in North West Pacific deep-sea barnacles (Cirripedia, Thoracica) collected by the TAIWAN expeditions, with descriptions of two new species
FIGURE 30. Hexelasma velutinum. A. Cirrus I, B. Cirrus II, C. Cirrus III, D. intermediate segments of inner ramus of cirrus VI.
FIGURE 27. Rostratoverruca krugeri. A. Maxilla, B. Maxillule, C. Mandible, D. Mandibular palp, E in North West Pacific deep-sea barnacles (Cirripedia, Thoracica) collected by the TAIWAN expeditions, with descriptions of two new species
FIGURE 27. Rostratoverruca krugeri. A. Maxilla, B. Maxillule, C. Mandible, D. Mandibular palp, E. Lower margin of mandible, F. Labrum, G. Second teeth of mandible, H. Cutting edge of mandible, showing fine teeth. Scale bars in µm.
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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)
ABODe is a University of Edinburgh DataShare dataset for behavior classification in group-housed mice using home-cage video, identities, bounding boxes, ground-plate positions, and annotator labels.
DANDI Archive for NWB datasets
DANDI is a BRAIN Initiative archive for publishing and sharing neurophysiology data, including electrophysiology, optophysiology, and behavioral data packaged as NWB and related standards.
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.