Fig. 1 in Morphology and evolution of the nervous system in Gnathostomulida (Gnathifera, Spiralia)

Fig. 1 Schematic drawings of the nervous system in Gnathostomula paradoxa as inferred from serotonin-like immunoreactivity and CLSM. a Entire body, dorsal structures. b Entire body, ventral structures. c Head and pharyngeal regions, dorsal structures. d Head and pharyngeal regions, ventral structures. Abbreviations: ap anterior perikaryon; asc anterior sensory cell; b brain; bg buccal ganglion; bn buccal nerve; bu bursa; dac1 first dorso-anterior commissure; dac2 second dorsoanterior commissure; dc dorsolateral nerve cord; dtn dorsal tail nerve; e egg; lc lateral nerve cord; ldp large dorsal perikaryon; llp large lateral perikaryon; lsc lateral sensory cell; mc median connective; mdc middorsal cell; mic mouth innervating cell; mo mouth opening; mp median perikarya; np neuropil; p penis; pb pharyngeal bulb; pc posterior commissure; pp posterior perikaryon; slp small lateral perikaryon; t tail; te testis; vac ventro-anterior commissure; vlc ventro-lateral nerve cord; vpc ventro-posterior commissure; vtn ventral tail nerve; * and + indicate where the dorsal part connects to the ventral one