Groups of neurosecretory cells situated in each eyestalk producing a moult-inhibiting hormone [Ingle, 1983].
Site of secretion of molt-inhibiting and other hormones. Located in eyestalks of most decapods or cephalon of sessile-eyed crustaceans. Also referred to as paired frontal organ in Anostraca [McLaughlin, 1980].
(Order Anostraca):
Neurosecretory structure in dorsal region of head; innervated by brain [Stachowitsch, 1992].
(Order Decapoda):
Neurosecretory structure in eyestalk (ocular peduncle). Secretes hormones that inhibit molting and are involved in gonad development and metabolism. In shrimp-like (natantian) decapod one may distinguish medulla terminalis X-organ and sensory pore X-organ [Stachowitsch, 1992].

Crustacea glossary. . 2011.

Look at other dictionaries:

  • X-Organ — X Organ,   Ansammlung neurosekretorischer Zellen (Sinnespapillen) in den Augenstielen höherer Krebse, die ein häutungshemmendes Peptidhormon (englisch moult inhibiting hormone; Abkürzung MIH) produzieren, das aus der Sinusdrüse in die Hämolymphe… …   Universal-Lexikon

  • x-organ — 1. (ARTHROPODA: Crustacea) In Decapoda, a neuro secretory organ situated in the eye stalk, and the cephalon of sessile eyed crustaceans; frontal organs in Anostraca; see organ of Bellonci, frontal eye complex, frontal organ. 2. (KINORHYNCHA) In… …   Dictionary of invertebrate zoology

  • X organ — …   Useful english dictionary

  • medulla terminalis X-organ — (Order Decapoda): X organ [Stachowitsch, 1992] …   Crustacea glossary

  • sensory pore X-organ — (Order Decapoda): X organ [Stachowitsch, 1992] …   Crustacea glossary

  • medulla X-organ — См. MTGX …   Dictionary of invertebrate zoology

  • medulla terminalis ganglionic X-organ — См. MTGX …   Dictionary of invertebrate zoology

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  • Organ harvesting — Intervention MeSH D020858 Organ harvesting refers to the removal, preservation and use of human organs and tissue from the bodies of the recently deceased to be used in surgical transplants on the living. Though mired in ethical debate and… …   Wikipedia

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