Atypical Spermiogenesis in Thermobia domestica, a Thysanuran Insect
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چکیده
منابع مشابه
Electron Microscope Study of Spermiogenesis in a Fire-brat Insect, Thermobia Domestica Pack
The fine structure of the mature spermatozoon of the insect Thermobia domestica has been investigated. This flagellate spermatozoon is unique with respect to the relative positions of the centriole, nucleus, mitochondrial nebenkern derivatives, and acrosome along the length of the cell. The acrosome lies at the posterior end of the nucleus. Unlike spermatozoa of most animals, the Thermobia sper...
متن کاملDevelopmental organization of the mushroom bodies of Thermobia domestica (Zygentoma, Lepismatidae): insights into mushroom body evolution from a basal insect.
The mushroom bodies of the insect brain are sensory integration centers best studied for their role in learning and memory. Studies of mushroom body structure and development in neopteran insects have revealed conserved morphogenetic mechanisms. The sequential production of morphologically distinct intrinsic neuron (Kenyon cell) subpopulations by mushroom body neuroblasts and the integration of...
متن کاملWater balance in the firebrat, Thermobia domestica (Packard). Exchanges of water with the atmosphere.
Watson (1967) has shown that the synonym Lepismodes iniquilinus Newman has priority over Tliermobia domestica (Packard), but to avoid confusion in the present context the junior synonym as used previously is retained throughout this paper. The ability of Tliermobia to take up water from subsaturated atmospheres down to 45% relative humidity (R.H.) at 21 C. has been demonstrated in an earlier pa...
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The loss of appendages immediately following a moult shortens the subsequent intermoult interval in adult Thermobia domestica. The loss of increasing numbers of appendages accelerates the ensuing moult incrementally. Leg amputation at sites distal to the trochanter-femoral autotomy plane has comparable effects in accelerating the moult. Functional legs regenerated at the first moult following a...
متن کاملReversible Arrest of Uptake of Water from Subsaturated Atmospheres by the Firebrat, Thermobia Domestica (packard)
1. A novel experimental technique incorporating a double-chambered array, which allows the independent and reversible exposure of head and tail ends of the insect to the surrounding atmosphere, without otherwise altering the constraints on the insect, is described. 2. Using this technique, it has been possible to demonstrate that rapid uptake of water from subsaturated atmospheres occurs in The...
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ژورنال
عنوان ژورنال: Nature
سال: 1961
ISSN: 0028-0836,1476-4687
DOI: 10.1038/190743a0