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Fig. 8 | Frontiers in Zoology

Fig. 8

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

Fig. 8

Comparison of the results of this study (a) with other taxa (b, c) and with previous studies (d–f). a Opiliones, this study, note region, that in previous studies (d–f) is described as M1, is indeed eye nerve and M1 lies deeper in the protocerebrum; b Scorpiones (Euscorpius italicus, E. hadzii; after Lehmann & Melzer [15]); c Araneae (Cupiennius salei; after Strausfeld et al. [22]); d Opiliones, after Saint Remy [25]; e Opiliones, after Hanström [29], note M2 subdivided into three layers (layer C, B, and C, see text) by Hanström; f Opiliones, after Breidbach & Wegerhoff [30], note M2 subdivided into two layers (internal and external, see text) by Breidbach & Wegerhoff. EN, eye nerve; L, lateral eye visual neuropil; LEN, lateral eye nerve; M, median eye visual neuropil; M/L2, region where M2 and L2 overlap; MEN, median eye nerve

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