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51 results for “Chaetopteridae”
Fig. 1. Chaetopterus norvegicus M. Sars, 1835. A in A new species of Chaetopterus (Annelida: Chaetopteridae) from eastern Canada, with a redescription of Chaetopterus norvegicus M. Sars, 1835
Fig. 1. Chaetopterus norvegicus M. Sars, 1835. A. Right lateral view of anterior fragment of a paralectotype NHMO C5877 (to segment B1). B. Ventral view of anterior fragment of a paralectotype NHMO C5877 (to segment B1). C. Top, tube fragment, bottom, lectotype specimen NHMO C7049 preserved within a fragment of tube. D–J. Uncini sampled from non-type, uncataloged LACM specimen Pol2 Z76/58. D. Uncinus of A9 neuropodium. E. Uncinus of B1 anterior neuropodial lobe. F. Uncinus of B1 posterior lobe. G. Uncinus of B3 piston torus. H. Uncinus of B3 ventral lobe. I. Uncinus of C1 lateral lobe. J. Uncinus of C1 ventral lobe. Scale bars: A–C = 5 mm; D–J = 20 µm.
Fig. 3 in A new species of Chaetopterus (Annelida: Chaetopteridae) from eastern Canada, with a redescription of Chaetopterus norvegicus M. Sars, 1835
Fig. 3. Illustrated differences in A9, B1, and B2 neuropodial structures among species. A. Chaetopterus norvegicus M. Sars, 1835, paralectotype NHMO C5877, anterior ventral view to segment B1. B. Chaetopterus bruneli sp. nov., holotype CMNA 2015-0016, anterior ventral view to B2. C. Chaetopterus longipes Crossland, 1904 (UF 5920) from Japan, anterior ventral view to B2. Light grey arrows indicate segment A9 neuropodia, black arrows indicate segment B1 neuropodia, and dark grey arrows indicate segment B2. Scale bars: 2 mm.
Figure 1 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 1. Mesochaetopterus rogeri sp. nov. A, B, Two typical positions of the protruded tentacles in living worms (underwater pictures taken by L. Dantart). C, Regions A, B, and C (preserved worm, morphotype with reddish bands). D, Ventral view of region A (preserved worm, morphotype without reddish bands). E, Detail of the anterior end (dorsal view). F, Detail of the anterior end (dorsal view, tentacles removed). Ar, region A; b1–b3, segments of region B; d1–d3, dorsal rami of region-B segments; v1–v3, ventral rami of region-B segments; Cr, region C. Scale bars are in cm.
Fig. 9 in Loss of complexity from larval towards adult nervous systems in Chaetopteridae (Chaetopteriformia, Annelida) unveils evolutionary patterns in Annelida
Fig. 9 The larval neurogenesis of Chaetopterus variopedatus revealed by anti-5HT a-e and anti-FMRFamide staining f, g. Confocal maximum projections. Stages are shown in hours (hpf) or days past fertilization (dpf). a: 48 hpf the posterior pioneer neuron (ppn) is well-developed and distinct neurite bundles interconnect the posterior and anterior part of the larval nervous system (white arrowheads). Prominent ganglion cells (green arrowhead & green dashed line) mark the position of the later apical organ. b: The posterior pioneer neuron (ppn) possesses a sensory cilium and marks the ontogenetic origin of the posterior nervous system. c: Later in development, the
Fig. 6 in Loss of complexity from larval towards adult nervous systems in Chaetopteridae (Chaetopteriformia, Annelida) unveils evolutionary patterns in Annelida
Fig. 6 Ultrastructure of glial cells. a: Nuclei (nu) of neurons are spherical shaped and euchromatic. Only a little soma (so) surround the nucleus. b: Nuclei of glial cells (nugc) are irregular formed and are heterochromatic. gl: gliosomes; ne: neurites; sone: somata of neu-
Fig. 5 in Loss of complexity from larval towards adult nervous systems in Chaetopteridae (Chaetopteriformia, Annelida) unveils evolutionary patterns in Annelida
Fig. 5 Ultrastructure of glial cells. a: Radial glia cell processes (gcp) are arranged perpendicular to the neurites (ne) of the brain and contain prominent bundles of intermediate filaments (if) and gliosomes (gl). b: Somata of glial cell (sogc) may contain numerous vesicles (vs). if: intermediate filaments; nugc: nucleus of glial cell. c: Neur-
Fig. 3 in Loss of complexity from larval towards adult nervous systems in Chaetopteridae (Chaetopteriformia, Annelida) unveils evolutionary patterns in Annelida
Fig. 3 Adult histology, details of brain and sensory structures, sections of anterior body region A (according to chaetopterid nomenclature). a, c, d: Spiochaetopterus costarum; b: Chaetopterus norvegicus. a: the brain (br) is composed of densely interwoven neurites (ne). Somata (so) are located dorsally of the neurites (ne). Intermediate filaments (if) are attached to the basal lamina (bl) and cross the neuropil. b: In between the neuropil of the brain nuclei of glial cells (nugc) can be found. Neurites (ne) are of different diameter. bl: basal
Fig. 1 The general chaetopterid anatomy. a in Loss of complexity from larval towards adult nervous systems in Chaetopteridae (Chaetopteriformia, Annelida) unveils evolutionary patterns in Annelida
Fig. 1 The general chaetopterid anatomy. a: living specimen of Spiochaetopterus costarum (anterior part, dorso-lateral view); b: fixed specimen of Chaetopterus norvegicus (anterior part, dorsal view); c, d: µCT, volume rendering, and 3D- reconstruction of the brain of Spiochaetopterus costarum; e: schematic drawing of palp innervation of Spiochaetopterus costarum. a: lateral view. ey: eye; mo: mouth;
Figure 3 from: Werding B, Hiller A (2019) A new species of Polyonyx (Crustacea, Anomura, Porcellanidae) inhabiting polychaete-worm tubes (Annelida, Chaetopteridae) in the Indo-West Pacific. ZooKeys 818: 25-34. https://doi.org/10.3897/zookeys.818.30587
Figure 3 Polyonyxsocialis sp. n., female paratype, SMF 52401, South China Sea, south coast of Vietnam, Nhatrang Bay, Mun Island. Right side of carapace deformed by parasitic isopods (Bopyridae). Scale bar: 3.0 mm.
Figure 1 from: Werding B, Hiller A (2019) A new species of Polyonyx (Crustacea, Anomura, Porcellanidae) inhabiting polychaete-worm tubes (Annelida, Chaetopteridae) in the Indo-West Pacific. ZooKeys 818: 25-34. https://doi.org/10.3897/zookeys.818.30587
Figure 1 Polyonyxsocialis sp. n., female holotype, dorsal view, SMF 52400, South China Sea, south coast of Vietnam, Nhatrang Bay, Tre Island, Dam Bay, dorsal view. Scale bar: 2.0 mm.
Figure 2 from: Werding B, Hiller A (2019) A new species of Polyonyx (Crustacea, Anomura, Porcellanidae) inhabiting polychaete-worm tubes (Annelida, Chaetopteridae) in the Indo-West Pacific. ZooKeys 818: 25-34. https://doi.org/10.3897/zookeys.818.30587
Figure 2 Polyonyxsocialis sp. n., male paratype, SMF 52401, South China Sea, south coast of Vietnam, Nhatrang Bay, Mun Island. a Third thoracic sternite b Telson c Right third maxilliped, dorsal view (setae omitted) d Left (larger) cheliped, dorsal and ventral views e First and second right walking legs, dorsal view f Detail of dorsal view of propodus and dactylus of right third walking leg. Scale bars: 0.5 mm (a–c, f), 2.0 mm (d), 1 mm (e).
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OpenNeuro
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