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Fig. 1 | Frontiers in Zoology

Fig. 1

From: The visual system of harvestmen (Opiliones, Arachnida, Chelicerata) – a re-examination

Fig. 1

Cobalt fills via both eyes of Leiobunum spec. (a-c) and Opilio canestrinii (d-g), transversal sections, dorsal is up. a right eye nerve and right first visual neuropil densely filled with cobalt, left nerve and neuropil less filled. Bar 100 μm. b three sections after A, in right hemisphere Cobalt-filled retinula axons terminate in first visual neuropil and in dorsal part of second visual neuropil, in second neuropil fewer fibres filled. Bar 100 μm. c detail of right hemisphere in B with border between both neuropils and Cobalt-filled retinula axons in dorsal part of second neuropil. Bar 50 μm. d Cobalt-filled retinula axons terminating via eye nerve in first and second visual neuropil. Bar 100 μm. e detail of right hemisphere in C with border between both neuropils and Cobalt-filled retinula axons in dorsal part of second neuropil. Bar 50 μm. f Cobalt-filled retinula axons with varicosities terminating in first and second visual neuropil. Bar 100 μm. g detail of left hemisphere in F with border between both neuropils and Cobalt-filled retinula axons with varicosities in dorsal part of second neuropil. Bar 50 μm. EN, eye nerve; M, median eye visual neuropil; NB, neuropil border

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