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67 results for “chaetae”
Fig. 8 in Cave-dwelling Coecobrya from southern China with a survey of clypeal chaetae in Entomobryoidea (Collembola)
Fig. 8. Coecobrya oculata sp. nov. A. Labrum. B. Dorsal cephalic chaetotaxy. C. Lateral process of labial palp. D. Chaetae on the ventral side of head. E. Trochanteral organ, ventral view. F. Hind claw. G. Anterior face of ventral tube and lateral flap. H. Posterior face of ventral tube. I. Mucro. J. Thoracic chaetotaxy. K–M, Abdominal chaetotaxy. K. Abd. I–III. L. Abd. IV. M. Abd. V. Scale bars: A, C–I = 20 μm; B, J–M = 100 μm.
Fig. 7 in Cave-dwelling Coecobrya from southern China with a survey of clypeal chaetae in Entomobryoidea (Collembola)
Fig. 7. Abdominal chaetotaxy of Coecobrya ciliata sp. nov. A. Abd. I–III. B. Abd. IV. C. Abd. V. Scale bars: 50 μm.
Fig. 6 in Cave-dwelling Coecobrya from southern China with a survey of clypeal chaetae in Entomobryoidea (Collembola)
Fig. 6. Coecobrya ciliata sp. nov. A. Ant. III organ. B. Dorsal cephalic chaetotaxy. C. Lateral process of labial palp. D. Chaetae on the ventral side of head. E. Trochanteral organ, ventral view. F. Hind claw. G. Anterior face of ventral tube ad lateral flap. H. Posterior face of ventral tube. I. Mucro. J. Thoracic chaetotaxy. Scale bars: A, C–I = 20 μm; B, J = 100 μm.
Fig. 3 in Cave-dwelling Coecobrya from southern China with a survey of clypeal chaetae in Entomobryoidea (Collembola)
Fig. 3. Coecobrya gejianbangi sp. nov. A. Thoracic chaetotaxy. B–D. Abdominal chaetotaxy. B. Abd. I–III. C. Abd. IV. D. Abd. V. Scale bars: 200 μm.
Fig. 9. Clypeal chaetae. A. Diagram. B in Cave-dwelling Coecobrya from southern China with a survey of clypeal chaetae in Entomobryoidea (Collembola)
Fig. 9. Clypeal chaetae. A. Diagram. B. Coecobrya gejianbangi sp. nov. C. Coecobrya annulata sp. nov. D. Coecobrya ciliata sp. nov. E. Coecobrya brevis. F. Coecobrya pani. Figures of the latter two species after Xu et al. (2012). Scale bars: 40 μm.
Fig. 4 in Cave-dwelling Coecobrya from southern China with a survey of clypeal chaetae in Entomobryoidea (Collembola)
Fig. 4. Coecobrya annulata sp. nov. A. Ant. III organ. B. Dorsal cephalic chaetotaxy. C. Chaetae on the ventral side of head. D. Trochanteral organ, ventral view. E. Hind claw. F. Anterior face and lateral flap of ventral tube. G. Posterior face of ventral tube. H. Mucro. Scale bars: A, C–E, H = 50 μm; B, F–G = 100 μm.
Fig. 2 in Cave-dwelling Coecobrya from southern China with a survey of clypeal chaetae in Entomobryoidea (Collembola)
Fig. 2. Coecobrya gejianbangi sp. nov. A. Ant. III organ. B. Dorsal cephalic chaetotaxy. C. Lateral process of labial palp. D. Chaetae on the ventral side of head. E. Trochanteral organ, ventral view. F. Fore claw. G. Hind claw. H–J. Ventral tube. H. Anterior face. I. Posterior face. J. Lateral flap. K. Manubrial plaque. Scale bars: A, C, E–G, K = 40 μm; B, D, H–J = 100 μm.
Figure 9. Mesochaetopterus xerecus. A, Dorsalmost capillary chaeta from A8. B in Description of a new species of Mesochaetopterus (Annelida, Polychaeta, Chaetopteridae), with redescription of Mesochaetopterus xerecus and an approach to the phylogeny of the family
Figure 9. Mesochaetopterus xerecus. A, Dorsalmost capillary chaeta from A8. B, Dorsolateral fine-lanceolate chaeta from A8. C, Lateroventral sickle-like chaeta from A8. D, Tip of the lateroventral sickle-like chaeta from A8. E, Ventralmost lancet-like chaeta from A8. F, Tip of the ventralmost lancet-like chaeta from A8. G, Ventralmost sickle-like chaeta from A10. Scale bars are in Mm.
Figure 5. Parapodia and chaetae. A in Systematics, evolution and phylogeny of Annelida - a morphological perspective
Figure 5. Parapodia and chaetae. A. Eunice pennata (Eunicidae); parapodium comprised of dorsal cirrus (dc), neuropodium (nep), ventral cirrus (vc) and branchia (br); acicula invisible. SEM micrograph. B. Scoloplos armiger (Orbiniidae). Cross section showing parapodium with supportive chaetae and chaetal sac; arrowheads point to sectioned chaetae. TEM micrograph. C. Syllidia armata (Hesionidae); notopodium restricted to dorsal cirrus and acicula (ac). D. Streptosyllis websteri (Syllidae). Aciculae (ac) extending outside parapodial lobe (arraowheads). E. Sphaerodopsis minuta (Sphaerodoridae). Acicula with chaetoblast (chb); arrowheads point to junctional complexes. F. Fabricia stellaris (Sabellidae). Parapodium of thorax with capillaries and uncini. G. Lanice conchilega (Terebellidae). Uncini. - ac = acicula, br = branchia, ch = chaeta, cm = circular muscle, coe = coelom, dc = dorsal cirrus, dlm = dorsal longitudinal muscle, ep = epidermis, dbv = dorsal blood vessel, fc = follicle cell, i = intestine, mv = microvillus, nep = neuropodium, obm = oblique muscle, pm = protractor muscle, rm = retractror muscle, snv = subneural blood vessel, vbv = ventral blood vessel, vc = ventral cirrus, vlm = ventral longitudinal muscle, vnc = ventral nerve cord. C, D, F, G: micrographs from living specimens, slightly squeezed.
Fig. 4. Chloeia parva chaetae. A–L in Pampus candidus
Fig. 4. Chloeia parva chaetae. A–L: specimen SWIMS-ANN-19-003. (A) bifurcate notochaetae, chaetiger 2, left side; (B) bifurcate notochaetae, chaetiger 4, left side; (C) bifurcate notochaetae, chaetiger 5, right side; (D) harpoon notochaetae, chaetiger 6, left side; (E) harpoon notochaetae, chaetiger 10, left side; (F) harpoon notochaetae, chaetiger 17, left side; (G) harpoon notochaetae, chaetiger 30, left side; (H) spinose notochaetae, chaetiger 5, 17 and 30, respectively; (I) bifurcate neurochaetae, chaetiger 2, left side; (J) bifurcate neurochaetae, chaetiger 10, left side; (K) bifurcate neurochaetae, chaetiger 17, left side; (L) bifurcate neurochaetae, chaetiger 30, left side. Scale bars: A–C, I–L = 50 μm; D–H = 100 μm.
Refractive index tomography of chitin-containing bristles (chaetae) from Platynereis dumerilii
<p>This dataset is a supplementary material including refractive index tomograms of an article </p> <p>Ikeda, K., Belevich, I., Zelaya-Lainez, L., Orel, L., Füssl, J., Gumulec, J., Hellmich, C., Jokitalo, E., Raible, F.: Dynamic microvilli sculpt bristles at nanometric scale. Nature Communications 2024.</p> <p><strong>Biochemical isolation of bristles and imaging</strong></p> <p>Larvae were washed twice using artificial sea water. The larvae were washed in artificial seawater supplemented with 25mM EGTA, then lysed for 1 hour in Triton X-100 1% in the same buffer on ice. We could observe the appearance of a gel containing bristles. The gel was washed twice in 10 mM Tris-HCl, 2.5 mM MgCl2, 0.5 mM, CaCl2pH 7.6. 50 μL were left inthe sample at the last wash and the gel was digested with 5 U of DNase I (Thermo Fischer Scientific) for 2.5 hours at 37°C with 360 rpm agitation. Next,the digest was supplemented with 100 μL of artificial sea water and digested with 200 μL of 2.5 μg/μL Liberase Enzyme Blend (Sigma-Aldrich) for 1 hour at 50°C. The bristles were washed 3 times in artificial seawater. The isolated bristles were mounted onμ Slide I Luer (Ibidi). The refractive index tomograms of isolated bristles were obtained by Nanolive 3D Cell Explorer with 60X magnification.</p> <p>The accompanied TIFF is 32-bit, where pixel values correspond to refractive index (e.g. pixel value in image 1.335 = refractive index <em>n</em>). The pixel size is 0.182um, the Z step is 0.372 um.</p>
Pelagiella exigua, an early Cambrian stem gastropod with chaetae: lophotrochozoan heritage and conchiferan novelty
<p>Exceptionally well-preserved impressions of two bundles of bristles protrude from the apertures of small, spiral shells of <i>Pelagiella exigua</i>, recovered from the Kinzers Formation (Cambrian, Stage 4, "<i>Olenellus </i>Zone", ~ 512 Ma) of Pennsylvania. These impressions are inferred to represent clusters of chitinous chaetae, comparable to those borne by annelid parapodia and some larval brachiopods. They provide an affirmative test in the early metazoan fossil record of the inference, from phylogenetic analyses of living taxa, that chitinous chaetae are a shared early attribute of the Lophotrochozoa. Shells of <i>Pelagiella</i> exhibit logarithmic spiral growth, microstructural fabrics, distinctive external sculptures, and muscle scars characteristic of molluscs. Hence, <i>Pelagiella</i> has been regarded as a stem mollusc, a helcionelloid expressing partial torsion, an untorted paragastropod, or a fully torted basal member of the gastropod crown group. The inference that its chaeta-bearing appendages were anterior-lateral, based on their probable functions, prompts a new reconstruction of the anatomy of <i>Pelagiella</i>, with a mainly anterior mantle cavity. Under this hypothesis, two lateral-dorsal grooves, uniquely preserved in <i>Pelagiella atlantoides</i>, are interpreted as sites of attachment for a long left ctenidium and a short one, anteriorly on the right. The orientation of <i>Pelagiella</i> and the asymmetry of its gills, comparable to features of several living vetigastropods, nominate it as the earliest fossil mollusc known to exhibit evidence of the developmental torsion characteristic of gastropods. This key adaptation facilitated an evolutionary radiation, slow at first and rapid during the Ordovician that gave rise to the remarkable diversification of the Gastropoda.</p>
Pelagiella exigua, an early Cambrian stem gastropod with chaetae: lophotrochozoan heritage and conchiferan novelty
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FIGURES 57–59 in Redescription of four Polish Endonura Cassagnau, 1979 (Collembola, Neanuridae, Neanurinae), with a nomenclature of the ventral chaetae of antennae
FIGURES 57–59. Endonura incolorata: 57, chaetotaxy of abd. III–VI (dorsolateral view); 58, chaetotaxy of tubercles L of abd. I–IV (left side); 59, chaetotaxy of head (ventrolateral view).
FIGURES 53–56 in Redescription of four Polish Endonura Cassagnau, 1979 (Collembola, Neanuridae, Neanurinae), with a nomenclature of the ventral chaetae of antennae
FIGURES 53–56. Endonura incolorata: 53, chaetotaxy and distribution of tubercles, first instar (dorsal view); 54, dorsal chaetotaxy of th. and abd. I; 55, scheme of position of sensillum and chaeta De1 on abd. I–IV (dm––dorsomedian line); 56, chaetotaxy of labium and group Vi.
FIGURES 50–52 in Redescription of four Polish Endonura Cassagnau, 1979 (Collembola, Neanuridae, Neanurinae), with a nomenclature of the ventral chaetae of antennae
FIGURES 50–52. Endonura incolorata: 50, chaetotaxy and distribution of tubercles, adult (dorsal view); 51, chaetotaxy of central area of head; 52 chaetotaxy and distribution of tubercles on abdomen, adult (ventral view).
FIGURES 40–42 in Redescription of four Polish Endonura Cassagnau, 1979 (Collembola, Neanuridae, Neanurinae), with a nomenclature of the ventral chaetae of antennae
FIGURES 40–42. Endonura dudichi: 40, chaetotaxy and distribution of tubercles, adult (dorsal view); 41, chaetotaxy of central area of head; 42, chaetotaxy and distribution of tubercles on abdomen, adult (ventral view).
FIGURES 34–39 in Redescription of four Polish Endonura Cassagnau, 1979 (Collembola, Neanuridae, Neanurinae), with a nomenclature of the ventral chaetae of antennae
FIGURES 34–39. Endonura tatricola: 34, tubercle (Di+Di) of abd. V; 35, tubercles Af and Cl on head (specimen from Bieszczady Mts.); 36, chaetotaxy of abd. II–VI (ventrolateral view); 37, dorsal chaetotaxy of head; 38, furca rudiment; 39, tubercle (Di+Di) of abd. V.
FIGURES 30–33 in Redescription of four Polish Endonura Cassagnau, 1979 (Collembola, Neanuridae, Neanurinae), with a nomenclature of the ventral chaetae of antennae
FIGURES 30–33. Endonura tatricola: 30, ventral chaetotaxy of head; 31, chaetotaxy of thorax, abd. I and subcoxae2 (lateral view); 32, chaetotaxy and distribution of tubercles (dorsal view, first instar); 33, scheme of position of sensillum and chaeta De1 on abd. I–IV (dm––dorsomedian line).
FIGURES 48–49 in Redescription of four Polish Endonura Cassagnau, 1979 (Collembola, Neanuridae, Neanurinae), with a nomenclature of the ventral chaetae of antennae
FIGURES 48–49. Endonura dudichi: 48, chaetotaxy of abd. IV–VI (dorsolateral view); 49, chaetotaxy of abd. II–IV (ventrolateral view).
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