Major differences in the larval anatomy of the digestive and excretory systems of three Oestridae species revealed by micro-CT
Major differences in the larval anatomy of the digestive and excretory systems of three Oestridae species revealed by micro-CT
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DOI：
10.1111/mve.12476
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发表时间：
2020-09-08
影响因子：
1.9
通讯作者：
Hall, M. J. R.
中科院分区：
文献类型：
--
作者：
Martin-Vega, D.;Clark, B.;Hall, M. J. R.
奥斯特利蝇（双翅目：在成虫阶段不进食，因此它们在寄生幼虫阶段依赖于有效的吸收和储存营养。描述了鼻蝇Oestrus ovis L.三龄幼虫的一般形态，并提供了消化和排泄器官的体积数据，使用微型计算机断层扫描。幼虫的消化和排泄器官的大小随龄期的增加而增大。在所有的年龄，两个唾液腺是非常大的，并形成一个“腺带”走到一起，但没有管腔团结，在其后端。前马氏管的远端区域大大扩大，充满了高度不透射线的结石。此外，对O.分别与两种食性相似和不同的食蚜蝇（C ephenemyia stimulator（Clark）和Hypoderma actaeon Brauer）进行了比较。而消化系统和排泄系统的一般形态和排列方式则不同。刺激剂与O. ovis，H. actaeon：中肠前部肿胀，唾液腺较短，不形成“带”，前马氏管在其整个长度上狭窄均匀。
Oestrid flies (Diptera: Oestridae) do not feed during the adult stage, so they depend on an efficient assimilation and storage of nutrients during their parasitic larval stage. We describe the general morphology and provide volumetric data for the digestive and excretory organs of the three larval instars of the nasal bot fly Oestrus ovis L., using micro-computed tomography. The size of the digestive and excretory organs greatly increased across larval instars. In all instars, the two salivary glands were remarkably large and formed a 'glandular band' by coming together, but without lumina uniting, at their posterior ends. The distal region of the anterior Malpighian tubules was greatly enlarged and full of highly radio-opaque concretions. Moreover, the anatomy of O. ovisthird-instar larva was compared to that of two species of, respectively, similar and different feeding habits:C ephenemyia stimulator(Clark) and Hypoderma actaeon Brauer. Whereas the general morphology and arrangement of the digestive and excretory systems of C. stimulator was similar to that of O. ovis, some differences were observed in H. actaeon: a swollen anterior region of the midgut, salivary glands shorter and not forming a 'band' and anterior Malpighian tubules narrowly uniform throughout their entire length.