水生生物学报2012，Vol.36Issue(2)：220-228,9.DOI:10.3724/SP.J.1035.2012.00220
脊椎动物中的一种解剖学新模型——黄鳝外周嗅觉系统
PERIPHERY OLFACTORY SYSTEM IN RICE FIELD EEL, MONOPTERUS ALBUS (PISCES: SYNBRANCHIDAE), A NEW MODEL IN ANATOMY IN VERTEBRATE
摘要
Abstract
Generally, olfactory organs and olfactory nerves of the left and right side in vertebrate are separate completely. Even for single nose-type cyclostomes, such as lampreys, their olfactory nerves are also separate completely. Furthermore, their anterior and posterior nostril (or choana), olfactory cavity, and cavity of olfactory accessory sac all communicate with each others, and the organs are usually open in whole. They usually have olfactory cavities, whose volume is relatively larger and steadier, and their olfactory epithelia primarily locate on one side of the cavities. Moreover, there is usually no lacuna in fish between their olfactory sacs and nasal pits.However, some great changes were found in the periphery olfactory system of rice field eel, Monopterus albus, with some conventional anatomy methods. The details were as follows: 1) although it possessed anterior and posterior nostrils, but they did not pass through each others, and its olfactory cavity connected the environment only via anterior one; 2) the posterior part of two olfactory sacs and the anterior part of two olfactory nerves were combined together, respectively. Besides, there were some unique characteristics in the rice field eel: 1) the olfactory sac was a long soft tubular-sac, its only opening (the anterior nostril) was often shut. 2) the olfactory sac attached longitudinally to the medial wall of each nasal pit, occupying only a small part of the pit cavity, so the pit was rather spacious. 3) the olfactory accessory sac did not communicate with the olfactory cavity and anterior nostril, but accessed to the outside via nasal pit and posterior nostril. 4) the terminals of two olfactory sacs get vis-a-vis across medial wall of each nasal pit, and enter oppositely into the transverse-tube between ethmoid and frontal bone, where the two olfactory sacs combined. 5) there were olfactory epithelium lined around on the inner edge of olfactory sac wall, with several puckers between the rugae, indicating that the sac might dilate. Therefore, the anatomical characteristics of periphery olfactory system in M. Albus were greatly different from all vertebrates including fishes.This study provided not only a novel model of periphery olfactory system in vertebrate, but also a specific evolu tionary example, and the anterior and posterior nostrils were not interlinked. Furthermore, we proposed a hypothesis of olfactory sac expanding-compress to explain the dynamic mechanism of odor sampling medium in and out the special olfactory cavity of the rice field eel.关键词
硬骨鱼类/合鳃鱼科/黄鳝/嗅觉器官/嗅神经/解剖学/新模型Key words
Teleost/Synbranchidae/Rice field eel Monopterus albus/Olfactory organ/Olfactory nerve/Anatomy/New model分类
生物科学引用本文复制引用
曾嶒,谢从新,陈学敏,符浩,李琦,林琛,刘晓霞..脊椎动物中的一种解剖学新模型——黄鳝外周嗅觉系统[J].水生生物学报,2012,36(2):220-228,9.基金项目
国家支撑计划(N12-01)资助 （N12-01）
