syncerebrum

plural syncerebra

1. biologyThe supraesophageal glanglia or brain of many invertebrates.

   We have then, probably, three types of syncerebra and two types of archicerebra among existing Crustacea.

   1883, F. V. Hayden, Twelfth Annual Report of the United States Geological and Geographical Survey of the Territories: A Report of Progress of the Exploration in Wyoming and Idaho for the Year 1878, volume 1, Washington: Govt. Print. Off., page 404

   4 more examples

   The syncerebrum of the Tetradecapoda (Amphipoda and Isopoda), judging by Leydig's figures¹ and our own observations (from dissections made by Mr. J. S. Kingsley) on that of Idotæa and Serolis², is built on a different plan from that of the Decapoda.

   1883, Alpheus Spring Packard, A Monograph of North American Phyllopod Crustacea, page 404

   In our Monograph of N. A. Phyllopoda, p.403, we adopted the view that the brains of all Crustacea except the Phyllopoda and Merostomata were syncerebra, and we divided the syncerebrum into three types; adding that the syncerebrum of sessile eyed crustacea (Edriophthalma) was built on a different plan from that of the Decapoda.

   1885, Memoirs, volumes 3-4, page 102

   The brain is a syncerebrum which is composed of a protocerebrum, innervating the three parts of the eye and the frontal glands; a deutocerebrum, innervating the antennules; and a tritocerebrum which innervates the labrum and the antennae and which contains the tritocerebral gland.

   1966, Patricia L. Dudley, Development and Systematics of Some Pacific Marine Symbiotic Copepods: A Study of the Biology of the Notodelphyidae, Associates of Ascidians, University of Washington Press, page 25

   The nervous system of Arachnida consists of a syncerebrum and the ventral ganglia that are more or less variously fused in a subesophageal nervous mass.

   1983, A. P. Gupta, editor, Neurohemal Organs of Arthropods: Their Development, Evolution, Structures, and Functions, Springfield, Ill: C.C. Thomas, page 150