The nervous system of the neotropical millipede Gymnostreptus olivaceus Schubart, 1944 (Spirostreptida, Spirostreptidae) shows an additional cell layer

Author(s)

Francisco, Annelise ^[1] ; Nocelli, Roberta C. F. ^[2] ; Fontanetti, Carmem S. ^[1]

Affiliation

^[1] Univ Estadual Paulista, Inst Biociencias, Dept Biol, BR-13506900 Rio Claro, SP - Brazil

^[2] Matemat & Educ UFSCar, Ctr Ciencias Agr, Dept Ciencias Nat, Araras, SP - Brazil

• Document type: Journal article
• Source: ANIMAL BIOLOGY; v. 65, n. 2, p. 133-150, 2015.
• Web of Science Citations: 1

Abstract

This study presents a morphological description of the central nervous system of the neotropical millipede Gymnostreptus olivaceus and the first report of an outer cell layer surrounding the nervous system in Diplopoda. The nervous system of this species consists of a brain formed by the fusion of proto-, deuto- and tritocerebrum, as well as a ventral nerve cord with metamerically arranged ganglia that extends through the entire length of the animal's body. The optic lobes, mushroom bodies and olfactory glomeruli of this species were located and described. As has been reported for other millipedes, the nervous system of G. olivaceus comprises a cortical layer in which three types of neurons could be identified and an inner region of neuropil, both of which are wrapped and protected by a perineurium and a neural lamella. However, more externally to the neural lamella, there is a discontinuous and irregular outer cell sheath layer containing distinctive cells whose function appears to be linked to the nutrition and protection of neurons. (AU)

• FAPESP's process: 12/24562-5 - Anatomy and morphology of the diplopod Gymnostreptus olivaceus (Diplopoda, Spirostreptidae) nervous system and evaluation of the insecticide deltamethrin effects on this system
• Grantee: Annelise Francisco
• Support type: Scholarships in Brazil - Master