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5 results for “Glossobalanus”
FIGURE 4 in Three new species of Glossobalanus (Hemichordata: Enteropneusta: Ptychoderidae) from western North America
FIGURE 4. Light micrographs of transverse sections of Glossobalanus barnharti. A, Proboscis with massive radial muscle bundles. B, Proboscis heart-kidney complex with lateral and dorsal glomerulus. C, Peduncle showing the large lumen of the stomochord. D, Peduncle with deep and narrow keel. E, Collar. F, Collar cord with dorsal nerve roots. G, Anterior pharynx large dorsal branchial lumen. H, Intestinal region with lateral septum and median gonads. Abbreviations: bv, blood vessel; cc, collar canal; cl, collar lumen; clm, collar longitudinal muscles; cv, cardiac vesicle; ds, dorsal septum; ep, epidermis g, glomerulus; gb, gill bar; mg, median gonad; lg, lateral gonad; ls, lateral septum; mg, median gonad; nc, nerve cord; nr, nerve roots; pbd, peribuccal diverticula; pc, proboscis coelom; phd, perihaemal diverticula; pl, pharynx lumen; plm, proboscis longitudinal muscles; s, stomochord; sk, skeletal keel; tc, trunk coelom; vp, vascular plexus. Scale bars: A, E, F, G, H = 500 µm; B, C = 200 µm; (D) = 250 µm.
FIGURE 3 in Three new species of Glossobalanus (Hemichordata: Enteropneusta: Ptychoderidae) from western North America
FIGURE 3. Light micrographs of transverse sections of Glossobalanus hartmanae. A, Proboscis with conspicuous circularmuscle layer, radial muscle bundles, heart-kidney complex and ventral septum. B, Proboscis peduncle showing the ventrolateral pouches of the stomochord and short skeletal keel. C, Collar showing a midventral vascular plexus. D, Dorsal nerve cord of collar with dorsal roots. E, Posterior collar showing canals. F, Anterior pharynx with plicate gill-bar epithelium. G, Intestinal region with lateral septum and median gonads. Abbreviations: a, atrium; bv, blood vessel; cc, collar canal; cg, ciliated groove; cl, collar lumen; cv, cardiac vesicle; ds, dorsal septum; ep, epidermis; g, glomerulus; gb, gill bar; gbe, gill-bar epithelia; gd, gonad; gp, gill pore; mg, median gonad; lg, lateral gonad, ls, lateral septum; nc, nerve cord; nr, nerve roots; pbd, peribuccal diverticula; pc, proboscis coelom; pcm, proboscis circular muscles; phd, perihaemal diverticula; pl, pharynx lumen; plm, proboscis longitudinal muscles; pr, parabranchial ridges; s, stomochord; sc, skeletal cornua; sk, skeletal keel; tlm, trunk longitudinal muscles; vp, vascular plexus. Scale bars: A, C, F, G = 500 μm; B = 200 μm; D, E = 250 μm.
FIGURE 2 in Three new species of Glossobalanus (Hemichordata: Enteropneusta: Ptychoderidae) from western North America
FIGURE 2. Light micrographs of transverse sections of Glossobalanus williami. A, Proboscis with radial muscle bundles, heart-kidney complex, and ventral septum. B, Proboscis heart-kidney complex with a distinct lumen and poorly developed glomerulus. C, Proboscis peduncle showing the proboscis canal and obtuse skeletal keel. D, Anterior collar showing only a dorsal septum. E, Mid collar with parabuccal diverticula and lateral skeletal cornua. F, Posterior collar showing canals to the first pair of gill atria. G, Pharynx with conspicuous gill slits. H, Pharynx showing only primary gonads. Abbreviations: cc, collar canal; cl, collar lumen; cv, cardiac vesicle; dep; dorsal epidermal pocket; ds, dorsal septum; ep, epidermis g, glomerulus; gb, gill bar; go, gonad; gp, gill pore; nc, nerve cord; nfl, nerve-fiber layer; pbd, peribuccal diverticula; pc, proboscis coelom; pcm, proboscis circular muscles; pcp, proboscis canal (and pore) of the peduncle; phd, perihaemal diverticula; pl, pharynx lumen; plm, proboscis longitudinal muscles; pn, anterior neuropore; pr, parabranchial ridges; s, stomochord; sb, skeletal body; sc, skeletal cornua; sk, skeletal keel; tc, trunck coelom; tlm, trunk longitudinal muscles; vs, ventral septum. Scale bars: A, E, F = 500 μm; B, C = 100 μm; D, G, H = 250 μm.
FIGURE 1 in Three new species of Glossobalanus (Hemichordata: Enteropneusta: Ptychoderidae) from western North America
FIGURE 1. Photograph of fixed specimens of A, Glossobalanus hartmanae n. sp.; B, G. b a r n h a r t i n. sp.; C, G. m i n u t u s. Abbeviations: bg, branchiogenital region of trunk; c, collar; ct, caudal region of trunk; ht, hepatic trunk; p, proboscis. Scale bar = 5 mm.
Fig. 1 in Structure and ultrastructure of eyes of tornaria larvae of Glossobalanus marginatus
Fig. 1 Tornaria larva of G. marginatus. a Picture of living tornaria in late Metschnikoff/early Krohn stage, about 2 mm in length. Ventral view, posterior is at the bottom. White arrows show eyes, which can be distinguished as dark spots, lying apical. b–d 3D reconstruction of anatomy of tornaria in late Metschnikoff/early Krohn stage. b Ventral view, posterior is at the bottom. The ciliary band of the neotroch runs along the grooves of the oral field (of) around the mouth opening. The protocoel (pc) attaches to the basal side of the apical organ (ao) by a muscular buccal band (bb). c Apical view onto the eyes in the apical organ (ao). The protocoel opening, i.e., the hydropore (hp) is seen next to the pericardium (pe). The arrows point to the eye, enlarged in d. d 3D reconstruction of eyecup. Dark mauve-colored cells are pigment cells (ec), forming the eyecup, creamcolored cells are processes of photoreceptor cells (ppc). Dashed orange lines indicate maximum reconstructed light cone, restricted by pigment cells, entering the eye: af, aboral field; ao, apical organ; bb, buccal band; ec, pigment cells forming the eye cup; hp, hydropore; in, intestine; mo, mouth opening; ms, mesoderm; oe, esophagus; of, oral field; pe, pericardium; pob, postoral ciliary band; ppc, processes of photoreceptor cells; prb, preoral ciliary band; st, stomach; tt, telotroch; vb, ventral ciliary band
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