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4 results for “Tubulanus”
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).
Tubulanus cf. lutescens
<p>Costa Rican deep-sea palaeonemertean, SIO-BIC N233</p> <p>Cross sections of anterior part, serial sections, 5µm, Azan</p>
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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