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294 results for “Nemertea”
Fig. 4. A in A Sponge-dwelling Ribbon Worm, Tetrastemma carneum sp. nov. (Nemertea: Monostilifera) Collected off Ofunato, Japan
Fig. 4. A maximum likelihood (ML) tree based on concatenated sequences of 16S (380 bp), COI (626 bp), 18S (1738 bp), 28S (505 bp), and H3 (329 bp). Solid circles indicate 100% of bootstrap values. Numbers near each node are support values generated by a separate partitioned ML bootstrap analysis with 1000 replicates.
Fig. 3 in A Sponge-dwelling Ribbon Worm, Tetrastemma carneum sp. nov. (Nemertea: Monostilifera) Collected off Ofunato, Japan
Fig. 3. Tetrastemma carneum sp. nov. (paratype), photomicrographs of transverse sections. A, Frontal organ (arrowhead); B, precerebral vessels (arrowheads); C, cerebral organs; D, brain; E, proboscis; F, posterior glands of cerebral ganglia; G, intestinal caeca; H, intestine; I, stylet apparatus. Abbreviations: ag, acidophilic glands; bg, basophilic glands; br, brain; co, cerebral organ; in, intestine; st, stomach. Scale bars: A–C, 100 µm; G, 50 µm; D–F, I, 75 µm; H, 150 µm.
Fig. 2 in A Sponge-dwelling Ribbon Worm, Tetrastemma carneum sp. nov. (Nemertea: Monostilifera) Collected off Ofunato, Japan
Fig. 2. Tetrastemma carneum sp. nov., photographs taken in life (type series). A, Whole body; B, magnification of head, dorsal; C, ventral. Abbreviations: acf, anterior cephalic furrow; pcf, posterior cephalic furrow; pp, proboscis pore. Scale bars: A, 2 mm; B, C, 500 µm.
Fig. 1. A in A Sponge-dwelling Ribbon Worm, Tetrastemma carneum sp. nov. (Nemertea: Monostilifera) Collected off Ofunato, Japan
Fig. 1. A collection site of Tetrastemma carneum sp. nov., off Ofunato, Iwate, Japan. A, Map showing the collection site of the specimens examined in the present study (red circle); B, demosponges from which specimens of T. carneum sp. nov. were found; C, magnification of demosponges—specimens of T. carneum were collected from a yellow demosponge attached to the bottom of a white demosponge (arrowhead).
Fig. 1 in Occurrence and Molecular Barcode of the Freshwater Heteronemertean Apatronemertes albimaculosa (Nemertea: Pilidiophora) from Japan
Fig. 1. Apatronemertes albimaculosa Wilfert and Gibson, 1974, ICHUM 5113 (A, B), 5112 (C), photographs taken in life. A, Entire body; B, magnification of body surface in intestinal region, showing minute oval inclusions in epidermis, these appearing white with lateral strobe illumination; C, anterior region.
Fig. 15 in Three Species of Ribbon Worms (Nemertea) from Cebu, the Philippines
Fig. 15. Coella gloriae sp. nov., photomicrographs of transverse sections through cerebral organ, holotype, PNM 4648. A–D, Canal leading medio-posteriorly to fuse with neuronal component; E–I, canal bifurcating into lateral and medial ducts; J–P, medial canal surrounded by sensory cells; Q–S, glandular component posteriorly in close contact with blood vessel and excretory collecting tubules; black arrowheads (C–G) indicating anterior nerve from brain, not innervating cerebral organ; white arrowheads (H, I) indicating cerebral-organ nerve fibres.
Fig. 14 in Three Species of Ribbon Worms (Nemertea) from Cebu, the Philippines
Fig. 14. Coella gloriae sp. nov., three-dimensional reconstructions of brain and cerebral organ based on holotype, PNM 4648. A, Dorsal view; B, ventral view.
Fig. 13 in Three Species of Ribbon Worms (Nemertea) from Cebu, the Philippines
Fig. 13. Coella gloriae sp. nov., photomicrographs of transverse sections, holotype, PNM 4648. A, Proboscis anterior chamber near its posterior end, showing stylet basis; B, magnification of central stylets; C, proboscis middle chamber; D, magnification of accessory stylet pouch; E, brain region; F, magnification of nerochord cell; G, brain region; stomach was pushed forward due to contraction during anesthetization/ fixation; H, cephalic tip showing frontal organ; I, pigment-cup ocellus; J, excretory pore in foregut region.
Fig. 12 in Three Species of Ribbon Worms (Nemertea) from Cebu, the Philippines
Fig. 12. Coella gloriae sp. nov., photomicrographs of transverse sections, holotype, PNM 4648. A, Body wall in foregut region; B, intestinal region showing dorsoventral muscles, testes, and rhynchocoel lateral diverticulum; C, foregut region showing well-developed circular muscles (indicated by arrowheads); D, proboscis insertion; E, precerebral region near mouth opening (indicated by arrowheads); F, precerebral region through proboscis pore (indicated by arrowhead); G, anterior-most rhynchocoel lateral diverticulum; H, I, proboscis anterior chamber; arrowheads indicating proboscis nerves differing in number by position. Scale bar for H: 50 µm.
Fig. 11 in Three Species of Ribbon Worms (Nemertea) from Cebu, the Philippines
Fig. 11. Coella gloriae sp. nov., photographs taken in life, holotype, PNM 4648. A, Entire body in contracted state, dorsal view; B, magnification of head, dorsal view.
Fig. 10 in Three Species of Ribbon Worms (Nemertea) from Cebu, the Philippines
Fig. 10. Prosadenoporus olympiae sp. nov., photomicrographs of transverse sections, holotype, PNM 4645. A, Precerebral region through frontal organ; B, magnification of a rectangle above rhynchodaeum on A, showing excretory tubules opening into frontal organ; C, magnification of rectangle on B, showing excretory tubules; D, magnification of a rectancle above cephalic vessel on A, showing excretory tubules.
Fig. 9 in Three Species of Ribbon Worms (Nemertea) from Cebu, the Philippines
Fig. 9. Prosadenoporus olympiae sp. nov., A, D–F, holotype, PNM 4645; B, paratype, PNM 4646; C, paratype, PNM 4647. A, Photograph of stylet apparatus taken from live proboscis under cover slip; B, C, intestinal regions; arrowhead indicates muscle fibre in lateral nerve; D, foregut region showing mid-dorsal vascular plug; E, precerebral region; F, magnification of flame cells.
Fig. 6 in Three Species of Ribbon Worms (Nemertea) from Cebu, the Philippines
Fig. 6. Balionemertes cf. australiensis Sundberg, Gibson, and Olsson, 2003, three-dimensional reconstructions of medullar fibrous tissue of the nervous system in brain region (i.e., cortical neuronal tissue is omitted); arrowheads indicating nerve fibres leading to buccal nerves sent out antero-ventrally from a commissure between inferior lobes of ventral ganglia. A, Left lateral view; B, dorsal view; C, ventral view; D, right rear view; E, magnification of commissures between inferior lobes of ventral ganglia, left rear view.
Fig. 7 in Three Species of Ribbon Worms (Nemertea) from Cebu, the Philippines
Fig. 7. Prosadenoporus olympiae sp. nov., photographs taken in life. A–C, Holotype, PNM 4645; D, paratype, PNM 4646. A, Entire body; B, head, dorsal view; C, head, ventral view; D, head, left lateral view.
Fig. 5 in Three Species of Ribbon Worms (Nemertea) from Cebu, the Philippines
Fig. 5. Balionemertes cf. australiensis Sundberg, Gibson, and Olsson, 2003, photomicrographs of transverse sections, PNM 4644. A–J, Serial images showing rhynchocoelic valves (indicated by arrowhead) in foregut region; K, proboscis; L, ocellus; M, ovary.
Fig. 1. A in Three Species of Ribbon Worms (Nemertea) from Cebu, the Philippines
Fig. 1. A, Map of the Philippines, showing the sampling locality (indicated by arrowhead); B, scenery of the sampling locality, Buente, Cebu, photo courtesy of Dr Emilia S. Yap, taken on 22 September 2006.
Fig. 4 in Three Species of Ribbon Worms (Nemertea) from Cebu, the Philippines
Fig. 4. Balionemertes cf. australiensis Sundberg, Gibson, and Olsson, 2003, photomicrographs of transverse sections, PNM 4644. A–C, Precerebral regions; D, proboscis insertion; E, anterior brain region; F, middle brain region just before ventral ganglion bifurcates into superior and inferior lobes; G, posterior brain region; arrowheads indicating nerve fibres leading to buccal nerves sent out antero-ventrally from a commissure between inferior lobes of ventral ganglia.
Fig. 3 in Three Species of Ribbon Worms (Nemertea) from Cebu, the Philippines
Fig. 3. Balionemertes cf. australiensis Sundberg, Gibson, and Olsson, 2003, photomicrographs of transverse sections, PNM 4644. A, Posterior foregut region through nephrostome; dotted lines indicate longitudinal muscles associated with lateral nerve cord; arrowhead indicates cells of unknown function; B, anterior foregut region showing inner circular muscles; C, foregut region showing mid-dorsal nerves and longitudinal muscle plate between rhynchocoel and foregut.
Fig. 2 in Three Species of Ribbon Worms (Nemertea) from Cebu, the Philippines
Fig. 2. Balionemertes cf. australiensis Sundberg, Gibson, and Olsson, 2003, photographs taken in life, PNM 4644. A, Anterior portion, dorsal view; head twisted leftward; epidermis on dorsal side largely damaged and exfoliated; B, head, right lateral view; arrowhead showing ocellus in ventral sub-group of anterior eye group; C, anterior end of body, ventral view, showing distribution of black dots.
Fig. 3 in A New Species of Bathyal Nemertean, Proamphiporus kaimeiae sp. nov., off Tohoku, Japan, and Molecular Systematics of the Genus (Nemertea: Monostilifera)
Fig. 3. Proamphiporus kaimeiae sp. nov., holotype, ICHUM 6058, photomicrographs of transverse sections. A, Body wall in brain region; B, anterior part of cerebral organs; arrowheads pointing to the radial canal; C, posterior part of cerebral organs; arrowhead pointing to the lateral canal; D, brain; arrowhead pointing to vascular plug; E, proboscis; F, testis; G, excretory collecting tubule (arrowhead). Abbreviations: ag, acidophilic glands; br, brain; de, dermis; dg, dorsal ganglion; ep, epidermis; ln, lateral nerve cord; mlm, middle longitudinal muscle layer of body wall; ocm, outer circular muscle layer of body wall; pb, proboscis; pe, proboscis epithelium; pic, proboscis inner circular muscle layer; poc, proboscis outer circular muscle layer; rh, rhynchocoel; st, stomach; te, testis; vg, ventral ganglion. Scale bars: A = 20 µm, B = 75 µm, C, G = 50 µm, D = 100 µm, E, F = 40 µm.
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Allen Brain Atlas
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