Fig. 11

Frontal histological sections of Zoea IV (Holländer stain). a - overview showing the median brain and anterior part of the cephalothorax, see Fig. 2C for section plane; b - overview slightly posterior to A showing the prominent mandibular adductor musculature (MA) dorsally, on the ventral side the labrum (Lb) and second antenna (A2). Hematopoietic tissue is associated dorsally and laterally with the wall of the cardiac stomach (CS); c – the unpaired central body (CB) is located in the centre of the protocerebrum that is dorsally surmounted by the anterior dorsal cells (ADC). The stomatogastric nerve (STN) is also visible. d – the deutocerebrum is characterized by spherical deutocerebral chemosensory lobes (DCL) on both sides. The projection neuron tract (PNT) emerges from the left DCL. e – rosette-shaped tegumental gland (TeG) in the labrum. Abbreviations: A1 - first antenna, A2 - second antenna, AA - anterior aorta, ADC - anterior dorsal cells of the protocerebrum, AGM - anterior gastric muscle, CA - cephalic artery, CB - central body, CF - cor frontale, CFM - cor frontale muscle, CS - cardiac stomach, Cu - cuticle, DC - deutocerebrum, DCL - deutocerebral chemosensory lobe, EyNP - eyestalk neuropil, HPT - hematopoietic tissue, Lb - labrum, MA - mandibular adductor musculature, PC - protocerebrum, PNT - projection neuron tract, Ros - rostrum, StG - stomatogastric ganglion, StN - stomatogastric nerve, TeG - tegumental gland