Labidognathia longicollis, Riedl, 1970
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publication ID |
https://doi.org/ 10.1007/s13127-017-0324-8 |
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persistent identifier |
https://treatment.plazi.org/id/FB38C33A-0D2C-A83A-FF25-FAFFFC10549A |
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treatment provided by |
Felipe |
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scientific name |
Labidognathia longicollis |
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Labidognathia longicollis View in CoL
SLIR nervous structures and DAPI-stained cell nuclei are visualized with CLSM. The brain consists of a central neuropil dorsally and laterally surrounded by perikarya, including 12 SLIR cells (4 × dpp, 4 × lpp, 2 × mp, 2 × vlp, Figs. 6b, c View Fig ; 7g). The neuropil contains four SLIR commissures, two dorso-anterior (dac1 and dac2, Figs. 6b View Fig , 7g), one ventro-anterior (vac, Figs. 6c View Fig , 7h), and one ventro-posterior (vpc, Figs. 6c View Fig , 7h); the two latter forming a characteristic ring-shaped structure.
Two pairs of nerve cords originate from the brain and extend along the trunk: the ventro-lateral nerves (originating from the ventro-posterior commissure; vlc, Figs 6a, c View Fig ; 7h) and lateral nerves (originating from the ventro-anterior commissure; lc, Figs. 6a, c View Fig ; 7h, j). The latter nerve cord terminates
Fig. 7 Z-projections of the nervous system of Rastrognathia macrostoma (a–f) and Labidognathia longicollis (g–j), anterior to the left. Serotonin-like immunoreactivity in white (a, b, and d), red (c), and glow (g–j); tyrosinated tubulin-like immunoreactivity in yellow, cell nuclei visualized with DAPI in cyan. a Entire body, ventral view. b and h Ventro-anterior nervous structures. c Virtual sagittal section through the posterior end of the animal, dorsal to the top. d, e, and g Nervous structures in the head region, dorsal view. f Nervous structures in the head region, ventral view. i Stomatogastric nervous system. j Virtual frontal section through the posterior end. Abbreviations: ap anterior perikaryon; aso anterior spiral organ; b brain; bg buccal ganglion; bn buccal nerve; cc compound cirri; dac dorso-anterior commissure; dac1 first dorso-anterior commissure; dc dorso-lateral nerve cord; dp dorsal perikaryon; dpp dorsal paired perikarya; lc lateral nerve cord; lp lateral perikaryon; lpp large paired perikarya; mdc middorsal cell; mp median perikarya; np neuropil;
p penis; pc posterior commissure; pcc posterior cell cluster; php pharyngeal perikarya; pp posterior perikaryon; pso posterior spiral organ; vac ventro-anterior commissure; vco ventral ciliary organ; vlc ventro-lateral nerve cord; vlp ventro-lateral perikaryon; vpc ventro-posterior commissure with a pair of SLIR posterior perikarya (pp, Figs. 6a View Fig , 7j). No transverse commissures have been observed in the trunk. A pair of peripheral SLIR perikarya (ap, Figs. 6a, c View Fig ; 7h) is locat- ed anterior to the pharynx between the ventro-lateral and the lateral nerve cords, and these two bundles are additionally interconnected by fine neurite bundles in the anterior part of the trunk ( Fig. 6a View Fig , 7h).
The buccal ganglion consists of about 40 cells, including seven SLIR perikarya (bg, Fig. 6a, b View Fig ; 7h, i), and gives rise to three buccal nerves, a pair extending along the pharyngeal wall towards the brain (bn, Fig. 6b View Fig , 7i) and the short median one, directed dorso-anteriorly. Three pairs of large SLIR cells are located along the paired buccal nerves (php, Fig. 6b View Fig , 7i); four of them possess projections directed towards the pharyngeal cavity.
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