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16 results for “Palaeonemertea”
Figure 3. Tubulanus riceae n in Tubulanus riceae new species (Nemertea: Anopla: Palaeonemertea: Tubulanidae), from South Florida, Belize and Panama
Figure 3. Tubulanus riceae n. sp. Approximately sagittal sections. Scale bar5100 mm. (A) Precerebral region of head. (B) Cerebral and post-cerebral region of head, contiguous from A. (C) Anterior of fixation band region (to right of vertical line). (D) Mid-point transition of fixation band, at third annulus (anterior is to left and posterior is to right of vertical line). Abbreviations: an, pigment annulus; dc, dorsal commissure; fg, foregut; fo, frontal organ; m, mouth opening; mc, basal mucoid cell bodies of pseudostratified epidermis; ne, nerve; pb, proboscis; pi, proboscis insertion; py, pylorus; rd, rhynchodeum; rdg, rhynchodeal glandular epithelium; rh, rhynchocoel; rp, rhynchopore; vg, ventral cerebral ganglion.
Figure 2. Tubulanus riceae n in Tubulanus riceae new species (Nemertea: Anopla: Palaeonemertea: Tubulanidae), from South Florida, Belize and Panama
Figure 2. Tubulanus riceae n. sp. transverse sections, except A, C, D, N. Scale bar lengths in parentheses. (A) Fixed anterior third of specimen; bracket denotes post-fixation staining band (1 mm). (B) Body wall; epidermis with variety of glandular cells (15 mm). (C) Sagittal section showing transverse musculature (star) passing between the epidermal mucus cells and the rhynchodeal glandular cells (rdg) (6 mm). (D) Sagittal section showing oblique (diagonal) musculature (oval) (6 mm). (E) Ventral ganglia (star) and ventral commissure (arrowhead) (12 mm). (F) Middle region of the cerebral sensory organ (star) (12 mm). (G) Putative ocellar pigment (oval) (12 mm). (H) Middle of lateral sensory organ (star), lateral blood vessel (lbv), lateral nerve cord (lnc) and inner circular muscle passing under foregut (arrow) (12 mm). (I) Testes (star) with mature sperm (12 mm). (J) Ovary with single maturing oocyte (14 mm). (K) Anterior of cephalic region, apical organ (oval) and epidermal brown pigment (star). (L) Anterior-most region of proboscis, proboscis nerves (star), subdorsal nerve (sd) and rhynchodeal nerve (circled) (6 mm). (M) SEM of surface of everted proboscis (5 mm). (N) Frontal section through right cerebral ganglion showing neurocord cell (oval) (20 mm). (O) Excretory duct (ed) (50 Mm). (P) Main nephridial tubule (upper part of oval) and cyrtocytes projecting into lateral blood vessel (lower part of oval) (50 Mm).
FIGURE 4 in An integrative description of a new Cephalothrix species (Nemertea: Palaeonemertea) from the South China Sea
FIGURE 4. Bayesian inference multi-locus cladogram of nemerteans. Numbers near the branches are the nodal support values (ML bootstrap value/Bayesian posterior probability). Solid circles indicate nodal support of 100/1.0.
FIGURE 3 in An integrative description of a new Cephalothrix species (Nemertea: Palaeonemertea) from the South China Sea
FIGURE 3 Cephalothrix suni sp. nov. (A-H) transverse histological sections of the holotype: precerebral region (arrows indicate four precerebral nerves) (A); cerebral region (arrow indicates rhynchocoel vessel) (B); postcerebral region (arrow indicates median ventral nerve) (C); preoral region (arrows indicate bifurcation of the median ventral nerve) (D); mouth region (arrows indicate two buccal nerves) (E); anterior foregut region (arrows indicate two buccal nerves) (F); anterior foregut region (arrows indicate joining of the buccal nerves) (F); middle foregut region (H). (I) thick transverse section in glycerol. Abbreviations: br, brain; cv, cephalic vessel; fg, foregut; ln, lateral nerve cord; lv, lateral vessel; m, mouth; pr, proboscis; rd, rhynchodaeum. Scale bars: 50 µm.
FIGURE 2 in An integrative description of a new Cephalothrix species (Nemertea: Palaeonemertea) from the South China Sea
FIGURE 2. Cephalothrix suni sp. nov., cLSM micrographs of the body and proboscis labelled with phalloidin: substack of transverse sections through the anterior foregut region (A, B, E), arrows indicate the inner part of the split OCM (B); substack of transverse sections through the posterior foregut region (C); substack of longitudinal sections through the body-wall musculature with crisscrossed DM in the foregut region (D); substack of transverse sections through the anterior foregut region (arrow indicate dorsal muscle cross) (F); substack of longitudinal sections through the proboscis musculature (arrows indicate DM) (G); substack of longitudinal sections through the proboscis epithelium with larger (arrows) and smaller (arrowheads) pseudocnidae (H); substack of longitudinal sections through the proboscis epithelium with long (arrowheads) and shorter (arrows) collars of sensory cells (I). Abbreviations: dm, diagonal musculature; dn, dorsal nerve; fg, foregut; icm, inner circular musculature; lm, longitudinal musculature; ln, lateral nerve cord; lp, longitudinal muscle plate; lv, lateral blood vessel; ocm, outer circular musculature; olm, outer part of LM; pr, proboscis; rh, rhynchocoel; vm, musculature of blood vessel. Scale bars: A, C – 100 µm; B, D–F – 50 µm; G, I – 20 µm; H – 10 µm.
FIGURE 1 in An integrative description of a new Cephalothrix species (Nemertea: Palaeonemertea) from the South China Sea
FIGURE 1. Cephalothrix suni sp. nov. (A) holotype: ventral view. (B) paratype: ventral view of the anterior body. Scale bars: (A), 2 mm; (B), 1 mm.
FIGURE 6 in Callinera emiliae sp. nov. (Nemertea: Palaeonemertea) from Negros Island, the Philippines
FIGURE 6. Callinera emiliae sp. nov. Holotype, ZIHU-3187, photomicrographs of transverse sections. A, anterior region of foregut. B, posterior region of foregut. C, intestinal region showing testis. D, foregut nerve ganglion just before mouth. E, lateral organ. F, excretory pore.
FIGURE 3 in Callinera emiliae sp. nov. (Nemertea: Palaeonemertea) from Negros Island, the Philippines
FIGURE 3. Callinera emiliae sp. nov. Holotype, ZIHU-3187, photomicrographs of transverse sections. A, rhynchodaeum. B, epidermal band. C, posterior portion of foregut region, showing horizontal muscle plate. D, intestinal sphincter.
FIGURE 5 in Callinera emiliae sp. nov. (Nemertea: Palaeonemertea) from Negros Island, the Philippines
FIGURE 5. Callinera emiliae sp. nov. Holotype, ZIHU-3187, photomicrographs of transverse sections of proboscis. A, first region. B, C, second region. D, third region. E, fourth main region. F, proboscis retractor muscles filling rhynchocoel posterior chamber.
FIGURE 2 in Callinera emiliae sp. nov. (Nemertea: Palaeonemertea) from Negros Island, the Philippines
FIGURE 2. Callinera emiliae sp. nov. Holotype, ZIHU-3187, photographs taken in life. A, general appearance of complete specimen; large arrowhead indicating anterior border of epidermal band, small arrowheads indicating epidermal constrictions. B, enlargement of head, viewed ventrally. C, enlargement of lateral organ, viewed ventro-laterally, head to the right; arrowhead indicating anterior border of epidermal band. D, enlargement of intestinal region; arrowhead indicating epidermal constriction.
FIGURE 1. A–D in Callinera emiliae sp. nov. (Nemertea: Palaeonemertea) from Negros Island, the Philippines
FIGURE 1. A–D, maps showing the sampling locality at increasing enlargements; arrowheads indicating sampling site (modified from ©2007 TerraMetrics and ©2006 GoogleEarth images).
FIGURE 4 in Callinera emiliae sp. nov. (Nemertea: Palaeonemertea) from Negros Island, the Philippines
FIGURE 4. Callinera emiliae sp. nov. Holotype, ZIHU-3187, photomicrographs of transverse sections. A, rhynchodaeal sphincter. B, ventral cerebral commissure. C, proboscis insertion. Paratype, UPLB-MNH-Z-NS-0389, D–K, junction between anterior (indicated by white arrowheads) and posterior (indicated by black arrowheads) rhynchocoel chamber; grey arrowheads indicating 'pleats' of posterior rhynchocoel chamber wall, originating from body-wall inner and outer circular muscle layers.
Figure 3 in Rhynchocoel vessel in Cephalotrichidae (Nemertea: Palaeonemertea)
Figure 3. Schematic diagram of sagittal sections of the cephalic region of cephalotrichids, showing three types of rhynchocoel vessel morphology. (A) Type A, found in Cephalothrix adriatica, Cephalothrix hongkongiensis, Cephalothrix kefersteini, Cephalothrix oestrymnica, Cephalothrix orientalis, Cephalothrix rufifrons, Cephalothrix cf. fasciculus and Cephalothrix cf. simula; (B) Type B, found in Cephalothrix filiformis sensu Iwata (1954); and (C) Type C, found in Cephalothrix filiformis s.str.
Figure 2 in Rhynchocoel vessel in Cephalotrichidae (Nemertea: Palaeonemertea)
Figure 2. Transverse sections to show the rhynchocoel vessel (indicated by an arrowhead) in cephalotrichids. (A) Cephalothrix cf. simula (Iwata, 1952) (ZIHU 3517); (B) Cephalothrix cf. fasciculus (Iwata, 1952) (ZIHU 3515); (C) Cephalothrix filiformis sensu Iwata (1954) (ZIHU 3177); (D) Cephalothrix filiformis (Johnston, 1828) (ZIHU 3511). Scale bars: A = 100 µm; B = 30 µm; C, D = 50 µm.
Figure 1 in Rhynchocoel vessel in Cephalotrichidae (Nemertea: Palaeonemertea)
Figure 1. Transverse sections to show the rhynchocoel vessel (indicated by an arrowhead) in cephalotrichids. (A) Cephalothrix adriatica Senz, 1993 (holotype, NHMW-EV 3236); (B) Cephalothrix hongkongiensis Sundberg et al., 2003 (holotype of Procephalothrix arenarius Gibson, 1990, BMNH 1987.2.27); (C) Cephalothrix kefersteini Senz, 2000 (holotype, NHMW-EV 4040); (D) Cephalothrix oestrymnica (Gibson, 1991) (holotype of Procephalothrix oestrymnica Gibson, 1991, BMNH 1990.6.2); (E) Cephalothrix orientalis (Gibson, 1990) (holotype of Procephalothrix orientalis Gibson, 1990, BMNH 1987.2.33); (F) Cephalothrix rufifrons (Johnston, 1837) (ZIHU 3510). Scale bars: A, B, C, F = 20 µm; D = 40 µm; E = 100 µm.
Figure 1. Tubulanus riceae n in Tubulanus riceae new species (Nemertea: Anopla: Palaeonemertea: Tubulanidae), from South Florida, Belize and Panama
Figure 1. Tubulanus riceae n. sp. Dorsal view of entire specimen. Arrowhead denotes lateral sensory organ. Scale bar51 mm.
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