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90 results for “Onychophora”
Figure 2 in A new species of Planipapillus (Onychophora: Peripatopsidae) that defies the original concept of its genus
Figure 2. Planipapillus absonus sp. nov.: male reproductive tract and associated glands, composite image drawn from holotype and paratype male. aag, anterior accessory gland; cg, crural gland; pa, posterior accessory gland; sv, seminal vesicle; t, testis; vd, vas deferens; ve, vas efferens.
Figure 1 in A new species of Planipapillus (Onychophora: Peripatopsidae) that defies the original concept of its genus
Figure 1. Planipapillus absonus sp. nov.: a, dorsolateral view in natura, ©David Paul; b, dorsal view; c, ventral view; d, anteriodorsal view; e, primary papilla; f, secondary papilla; g, crural papilla, leg 6; h, leg 5; i, nephridiopore, leg 5. b–d, stacked stereomicrographs, holotype ♂ 0.84 mm HWE (MV K7279), scale bars = 1 mm; e–i, scanning electron micrographs, paratypes MV K7280, scale bars = 30 µm; e, f, h, I, ♀ 1.04 mm HWE; g, ♂ 0.77 mm HWE.
Figure 3 in Characterisation of chitin in the cuticle of a velvet worm (Onychophora)
Figure 3. FT-IR spectra: overview (top), detail (below). Commercial α-chitin (a), extracted chitin from Peripatoides novaezealandiae (b), and β-chitin from cuttlebone (c).
Figure 2 in Characterisation of chitin in the cuticle of a velvet worm (Onychophora)
Figure 2. Structure of the cuticle of Peripatoides novaezealandiae. A SEM image of the dorsal cuticle showing transversely folded ridges with bristled and nonbristled papillae covered by ribbed 'scales'. B: Semithin section; note thinness of the cuticle (arrows). s papilla (arrowhead); co = collagen, ep = epidermis, mu = muscles. C: Low-power TEM image of the epidermis (ep), and cuticle (cu). Note the collagenous layer beneath the epidermis (co). D–F: High power TEM images showing the varying appearance of the epicuticle and the procuticle. D: Epicuticle (double-headed arrow) with several layers, the inner epicuticle (arrow) is osmiophilic; procuticle (pr) with fibrous (asterisk) and more compact parts (circle). E: Largely fibrous procuticle; the osmiophilic inner epicuticle seems to be reduced; note the space between layers 1 and 2 bridged by small vertical structures (arrow); unknown structures in the procuticle (arrowheads): F: Transition from the three-layered epicuticle (1, 2, 3) to the epicuticular parts with the space between layers 1 and 2. G: SEM images of the surface of a chitin isolate showing randomly arranged nanofibres. Inset: high power image of nanofibres.
Figure 1 in Characterisation of chitin in the cuticle of a velvet worm (Onychophora)
Figure 1. Preserved specimens (A–B) and chitin isolates (C–D) of Peripatoides novaezealandiae. A: Lateral view. B: Ventral view. C: Chitin skeleton of complete specimen. D: Chitin skeleton of a single segment.
Figure 4 in Characterisation of chitin in the cuticle of a velvet worm (Onychophora)
Figure 4. (a) Thermogravimetric (TG) and (b) derivative thermogravimetric (DTG) curves of chitin isolated from Peripatoides novaezealandiae.
Supporting Images to "A new species of velvet worm of the genus Oroperipatus (Onychophora: Peripatidae) from western Amazonia"
<p>Raw photographs, without <span><span>bright</span><span>ness and contrast adjustments,</span></span> corresponding to those shown in Figure 3 of "A new species of velvet worm of the genus <em>Oroperipatus</em> (Onychophora: Peripatidae) from western Amazonia".</p> <p><span><span><span>P</span></span></span><span><span><span>hotographs published in</span></span></span><span><span><span> Figure </span></span></span><span><span><span>3</span></span></span><span><span><span> were obtained by stacking using</span></span></span> <span><span>CombineZ</span><span>P</span><span> 1.0 software</span></span><span><span>, and </span></span><span><span><span>then adjust</span></span></span><span><span><span>ed for</span></span></span> <span><span>bright</span><span>ness and contrast </span></span><span><span>to highlight taxonomically important structures with Adobe Photoshop CC 2020 software (Adobe Systems, USA).</span></span></p> <p>Fig. 3. Tegument and legs morphology of <em>Oroperipatus tiputini</em> sp. nov. A. Dorsal integument. B. Ventral detail of right leg V showing five spinous pads and nephridial tubercule (np) indented at third spinous pad. C. Genital pad and pregenital legs of right side showing crural tubercules pointed by white arrows. Scales bars: 1 mm (A), 0.2 mm (B), 0.4 mm (C).</p>
Linked collectors and determiners for: Onychophora of Costa Rica (INBio).
Natural history specimen data linked to collectors and determiners held within, "Onychophora of Costa Rica (INBio)". Claims or attributions were made on Bionomia by volunteer Scribes, <a href="https://bionomia.net/dataset/5b60a2c5-5a31-4236-bbaa-3939a4ee4785">https://bionomia.net/dataset/5b60a2c5-5a31-4236-bbaa-3939a4ee4785</a> using specimen data from the dataset aggregated by the Global Biodiversity Information Facility, <a href="https://gbif.org/dataset/5b60a2c5-5a31-4236-bbaa-3939a4ee4785">https://gbif.org/dataset/5b60a2c5-5a31-4236-bbaa-3939a4ee4785</a>. Formatted as a Frictionless Data package.
Linked collectors and determiners for: The Myriapoda & Onychophora collection (MY) of the Muséum national d'Histoire naturelle (MNHN - Paris).
Natural history specimen data linked to collectors and determiners held within, "The Myriapoda & Onychophora collection (MY) of the Muséum national d'Histoire naturelle (MNHN - Paris)". Claims or attributions were made on Bionomia by volunteer Scribes, <a href="https://bionomia.net/dataset/3287044c-8c48-4ad6-81d4-4908071bc8db">https://bionomia.net/dataset/3287044c-8c48-4ad6-81d4-4908071bc8db</a> using specimen data from the dataset aggregated by the Global Biodiversity Information Facility, <a href="https://gbif.org/dataset/3287044c-8c48-4ad6-81d4-4908071bc8db">https://gbif.org/dataset/3287044c-8c48-4ad6-81d4-4908071bc8db</a>. Formatted as a Frictionless Data package.
Figure 9 in Position and development of oocytes in velvet worms shed light on the evolution of the ovary in Onychophora and Arthropoda
Figure 9. Development of the endogenous ovary in Epiperipatus biolleyi. Transmission electron micrographs. A, position of the ovarian anlage beneath the presumptive heart and attached to the pericardial floor (pe) in an embryo with a full number of somites. Cross-section of the dorsal body. B, cross-section of an ovarian tube. Note the distinct separation into a germinal epithelium (ge), which contains the primordial germ cells (pgc), and a sterile epithelium (se). C, detail of the sterile epithelium. D, detail of the germinal epithelium. Arrowheads indicate apical junctions. Abbreviations: bl, basal lamina; ec, ectoderm; ge, germinal ovarian epithelium; hc, haemocoel; hl, lumen of the presumptive heart; lu, lumen of the ovarian anlage; me, outer layer of mesodermal cells that will later form the ovarian musculature; nu, nucleus; pe, presumptive pericardial floor; pgc, primordial germ cells; se, sterile ovarian epithelium.
Figure 7 in Position and development of oocytes in velvet worms shed light on the evolution of the ovary in Onychophora and Arthropoda
Figure 7. Internal organization of the endogenous ovary in Epiperipatus biolleyi. Light micrograph (A) and transmission electron micrographs (B–F). A, cross-section of the ovary (dorsal is up). Note the central position of ovarian lumen (lu) surrounded by germinal epithelium (ge) and the lack of a sterile epithelium. B, maturating oocyte (oc) from the germinal epithelium lying within a spherical chamber (ch), which is formed by specific cells (ce) of the germinal epithelium. C, detail of epithelial cells and an oocyte. Arrowheads indicate apical junctions. D, detail of the basal portion of the germinal epithelium with surrounding connective tissue containing muscle cells (mc). E, lower magnification of connective tissue showing numerous tracheal tubes (arrows). F, peripheral region of connective tissue containing tracheal tubes (tr) and flattened cells with an electron-dense content (fc). Abbreviations: bl, basal lamina; ce, cells of germinal epithelium that form the oocyte chamber; ch, oocyte chamber; ct, connective tissue; fc, flattened cell; ge, germinal epithelium; hc, haemocoel; lu, ovarian lumen; mc, muscle cells; mv, microvilli; nl, nucleolus; nu, nucleus; oc, maturating oocytes; tr, tracheal tubes.
Figure 5 in Position and development of oocytes in velvet worms shed light on the evolution of the ovary in Onychophora and Arthropoda
Figure 5. Internal organization of the exogenous ovary in Opisthopatus roseus (A–C, E, F) and Peripatopsis balfouri (D). Transmission electron micrographs. A, detail of ovarian epithelia and lumen. Arrowheads indicate apical junctions connecting epithelial cells. B, mitotically dividing oogonium (og) from the germinal epithelium. C, maturating oocyte (oc) with associated cells (ce) of modified germinal epithelium. Arrows point to the basal lamina which is strongly folded. D, maturating oc in the process of breaking through the connective tissue and growing out into the haemocoel. E, detail of dorsal ovarian wall showing the sterile epithelium (se) and the connective tissue (ct), which contains the musculature (mc). F, higher magnification of connective tissue showing muscle cells and collagen fibres. Abbreviations: bl, basal lamina; ce, cells associated with an oocyte (sometimes referred to as 'follicle cells' in the literature); cg, collagen fibres; ct, connective tissue; ge, germinal epithelium; hc, haemocoel; he, haemocyte; lu, ovarian lumen; mc, muscle cell; mt, mitochondria; mv, microvilli; nl, nucleolus; nu, nucleus; oc, maturating oocyte; og, oogonium; se, sterile epithelium; st, growing stalk.
Figure 4 in Position and development of oocytes in velvet worms shed light on the evolution of the ovary in Onychophora and Arthropoda
Figure 4. Internal organization of the exogenous ovary in Opisthopatus roseus (A, B) and Peripatopsis balfouri (C). Transmission electron micrographs. A, cross-section through the middle of the ovary. Dorsal is up. Note the unpaired lumen (lu) and the separation of the ovarian epithelium into a dorsal sterile epithelium (se) and a ventral germinal epithelium (ge). B, stalked oocytes enclosed by a vitelline membrane (= primary egg membrane). C, detail of a stalk. Arrows indicate intermediate filaments, arrowheads point to hemidesmosomes. Inset shows continuity of the basal lamina covering a stalk and a maturating oocyte that bulges into the haemocoel of the female. Abbreviations: bl, basal lamina; ct, connective tissue; ge, germinal epithelium; hc, haemocoel; lu, ovarian lumen; nl, nucleolus; nu, nucleus; oc, maturating oocytes; se, sterile epithelium; st, stalk; vm, vitelline membrane.
Figure 6 in Position and development of oocytes in velvet worms shed light on the evolution of the ovary in Onychophora and Arthropoda
Figure 6. Internal organization of the pseudoendogenous ovary in Metaperipatus inae (A–E) and Metaperipatus blainvillei (F). Light micrographs (A, B) and transmission electron micrographs (C–F). A, cross-section of the ovary (dorsal is up). Note the lateral position of the crescent-shaped ovarian lumen (lu) and the central position of the germinal epithelium (ge). B, detail of stalked oocytes (oc) from the germinal epithelium, which do not bulge into the haemocoel but retain their position within the ovary. C, detail of cells (ce) surrounding a maturating oocytes in the germinal epithelium. D, detail of a stalk. Arrows indicate the intermediate filaments. E, detail of the lumen and ovarian epithelia. The epithelial cells are connected by an apical junction (arrowhead). F, lateral ovarian wall consisting of the sterile epithelium (se) and connective tissue containing muscle cells (mc), a haemocyte (he), and sperm (sh). Abbreviations: bl, basal lamina; ce, cells associated with an oocyte; cg, collagen fibres; ct, connective tissue; ge, germinal epithelium; hc, haemocoel; he, haemocyte; lu, ovarian lumen; mc, muscle cell; mv, microvilli; nl, nucleolus; nu, nucleus; oc, maturating oocyte; se, sterile epithelium; sh, sperm head; st, stalk; sw, sterile ovarian wall.
Figure 3 in Position and development of oocytes in velvet worms shed light on the evolution of the ovary in Onychophora and Arthropoda
Figure 3. Diagram of internal organization of the three major ovarian types in Onychophora: exogenous ovary (A, D), pseudoendogenous ovary (B, E), and endogenous ovary (C, F). A, cross-section of the exogenous ovary with separate ovarian tubes that occur, e.g. in Euperipatoides rowelli, Phallocephale tallagandensis, and Ooperipatellus insignis (Australian Peripatopsidae). B, cross-section of the pseudoendogenous ovary of Metaperipatus inae (Peripatopsidae, Chile). C, cross-section of the endogenous ovary of Epiperipatus biolleyi (Peripatidae, Costa Rica). Note the complete lack of a sterile epithelium. D, detail of the composition of the ovarian wall in Opisthopatus roseus (Peripatopsidae, South Africa). E, detail of the ovary in Met. inae. F, detail of the ovarian wall in Ep. biolleyi. Abbreviations: bl, basal lamina; ct, connective tissue; fc, flattened cell; ge, germinal epithelium; hc, haemocoel; lu, ovarian lumen; mc, muscle cell; oc, oocyte; se, sterile epithelium; st, stalk; tr, tracheae.
Figure 1 in Position and development of oocytes in velvet worms shed light on the evolution of the ovary in Onychophora and Arthropoda
Figure 1. Simplified diagrams of paired versus variously fused structure of the ovarian tubes in Onychophora. Tissues are represented in light grey, ovarian lumen in dark grey. A, exogenous ovary of Typhloperipatus williamsoni (South-East Asian Peripatidae). Modified and complemented according to descriptions given by Kemp (1914). B–D, exogenous ovaries in three species of Peripatopsidae. B, Euperipatoides rowelli (Australia). Note the completely separate ovarian tubes in the middle of the ovary and the fused ovarian lumens at the anterior and posterior ends. A similar ovarian organization has been described in Peripatoides novaezealandiae from New Zealand (Sheldon, 1890: fig. 26). C, Peripatopsis balfouri (South Africa, cf. Fig. 2A). Although the ovarian tubes are fused, their lumens are separate along their entire length. D, Opisthopatus roseus (South Africa). Note the unpaired ovarian structure with a single lumen. E, pseudoendogenous ovary of Metaperipatus inae (Peripatopsidae, Chile, cf. Fig. 2B) with fused ovarian tubes but separate lumens. F, endogenous ovary of Epiperipatus biolleyi (Neotropical Peripatidae, cf. Fig. 2C) with lumens communicating only at the posterior end. G, endogenous ovary of Mesoperipatus tholloni (Peripatidae, Tropical Africa), modified and complemented after Bouvier (1905). Each ovarian tube is completely separate in this species.
Figure 10 in Position and development of oocytes in velvet worms shed light on the evolution of the ovary in Onychophora and Arthropoda
Figure 10. Mapping of three major types of onychophoran ovaries on simplified trees representing three different hypotheses on the phylogenetic relationships of Onychophora. Onychophoran subgroups are designated by their geographical distribution. Note that the suggestion of the exogenous type as an ancestral feature of Onychophora is consistent with all three phylogenetic hypotheses. A, both Peripatopsidae and Peripatidae are monophyletic (phylogeny modified from Monge-Nájera, 1995: fig. 10). B, Peripatidae are nonmonophyletic (phylogeny simplified from Reid, 1996: fig. 29). C, Peripatopsidae are nonmonophyletic (phylogeny simplified from Reid, 1996: fig. 28).
Figs 10–13 in Peripatopsidae (Onychophora) from New Zealand - observations on selected morphs of the 'Peripatoides novaezealandiae-complex' in culture: morphological and reproductive aspects
Figs 10–13. Sketches of posterior ventral body surface. 10. Juvenile from Boundary stream, 2 months, genital area and papillae of anal cone still undifferntiated (30 x). 11. Juvenile from Boundary Stream, 5 months, female (30 x). 12. Juvenile from Woodville Gorge, 2 months, genital area and papillae of anal cone still undifferentiated (30 x). 13. Juvenile from Paengora Mataroa, 2 months, male (30 x).
Figs 6–9. Selected hatchlings and juveniles. 6 in Peripatopsidae (Onychophora) from New Zealand - observations on selected morphs of the 'Peripatoides novaezealandiae-complex' in culture: morphological and reproductive aspects
Figs 6–9. Selected hatchlings and juveniles. 6. Boundary Stream: premature hatchling with slime gland (25 x). 7. Juvenile from Ngapaerera: stage A (7 x). 8. Juvenile from Boundary Stream: stage A (7 x). 9. Juvenile from Monckton: stage C (10 x).
Figs 3–5 in Peripatopsidae (Onychophora) from New Zealand - observations on selected morphs of the 'Peripatoides novaezealandiae-complex' in culture: morphological and reproductive aspects
Figs 3–5. Diagram, micrograph and photograph of selected morphs. 3. Schematic sketch of Mohi Bush male: fifth leg, ventral view (Scale bar = 163 m). 4. SEM micrograph of genital pore: Monckton male (Fig. rotated approx. 45˚). 5. Monckton: premature hatchling (25 x).
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