The gross anatomy of the nervous system of Bothriurus bonariensis (L. C. KOCH, 1842) (Scorpiones, Bothriuridae)

Abstract

The nervous system of the order Scorpiones appears to have a common organizational structure. The combination of an anatomical study using methylene blue as the contrast medium together with a histological analysis using hematoxylin-eosin and Heindenhain´s iron hematoxylin techniques permitted the identkfication of a large number of nerves in B. bonariensis. Many of these are also present in a variety of other species of scorpions, belonging to distinct families of the order Scorpiones. Nevertheless, two pairs of nerves from B. bonariensis originating in the cheliceral ganglion, one pair of esophageal nerves and one pair of nerves from the aortic arch, appear to diverge from this basic organization. They have not been previously described, nor have any equivalents been reported in research on other scorpion species, in which the current homological criteria have been employed. Key-words: scorpion, Bothriurus, nervous system, ganglia, anatomy. RESUMO Anatomia do sistema nervoso de Bothriurus bonariensis (L. C. KOCH, 1842) (Scorpiones, Bothriuridae)O sistema nervoso da ordem Scorpiones parece apresentar um plano comum de organização. Uma abordagem anatômica, utilizando o azul de metileno como meio contrastante para o tecido nervoso, e histológica, por intermédio das técnicas da hematoxilina-eosina e hematoxilina férrica de Heindenhain, permitiu identificar um grande número de nervos em B. bonariensis também presentes em diversas outras espécies de escorpiões, pertencentes a famílias distintas da ordem Scorpiones. Contudo, 2 pares de nervos de B. bonariensis com origem no gânglio queliceral, o par de nervos esofagianos e o par de nervos dos arcos aórticos, parecem divergir desse plano comum, visto não terem sido descritos anteriormente nem possuírem equivalentes em outras espécies de escorpiões pelos critérios de homologia utilizados.Palavras-chave: escorpião, Bothriurus, sistema nervoso, gânglios, anatomia.

Neuroanatomy in a middle Cambrian mollisoniid and the ancestral nervous system organization of chelicerates

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Identification of an arthropod molecular target for plant-derived natural repellents

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A wonderful network unraveled - Detailed description of capillaries in the prosomal ganglion of scorpions

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