TY - JOUR T1 - Fine structural analysis of the silk apparatus in the funnel-web spider, Agelena limbata (Araneae: Agelenidae) JF - Korean Journal of Entomology Y1 - 2002 A1 - Park, Jong-Gu A1 - Moon, Myung-Jin SP - 223 EP - 232 KW - Agelena limbata (Araneae). KW - Agelena limbata [Silk glands / / Fine structure] [Spinnerets / / ]. KW - Appendages KW - General morphology AB - Silk apparatus of the funnel-web spider, Agelena limbata was located at the ventral end of the abdominal part, and was composed of internal silk glands and external spinnerets. Among the three pairs of spinnerets, the posterior pairs were highly elongated along the body axis. By the light and electron microscopic inspections, it was found that four types of silk glands were connected through the typical spinning tubes of each spinneret. Anterior spinnerets comprise 2 pairs of the ampullate and 125 to 150 pairs (female) or 110 to 114 (male) of pyriform glands. Another 2 pairs of ampullate glands in both sexes, 5 to 8 pairs of tubuliform glands in females, and 20 to 26 pairs (female) or 15 to 17 pairs (male) of aciniform glands were connected on the median spinnerets. Additional 8 to 10 pairs of tubuliforms in female and 41 to 53 pairs (female) or 27 to 32 pairs (male) of aciniform glands were on the posterior spinnerets, respectively. While the ampullate and tubuliform glands were connected with the spigot-type spinning tubes, the pyriform and aciniform glands with that of spool-type tubes. It has been also revealed that the tubuliform glands were only observed in female spiders, however the flagelliform and aggregate glands which had the function of adhesive thread production in orb-web spiders were not observed at both sexes of this spiders. VL - 32 SN - 1011-9493 UR - ://ZOOREC:ZOOR13900027821 N1 - ZOOR13900027821 ER - TY - JOUR T1 - Fine structural analysis of the neuromuscular junction in the venomous organ of the spider, Agelena limbata (Araneae: Agelenidae) JF - Korean Journal of Zoology Y1 - 1996 A1 - Moon, Myung-Jin SP - 223 EP - 230 KW - Agelena limbata (Araneae). KW - Agelena limbata [Toxins and venoms / / Venomous organ KW - Biochemistry KW - Cephalic glands KW - Digestive system KW - gland] [Venom glands / / ]. KW - junction KW - Nervous system KW - neuromuscular KW - ultrastructure] [Synapses / / Neuromuscular junction in venom AB - Fine structure of the neuromuscular junction in the venomous organ of the spider, Agelena limbata, was studied using high magnification electron microscope. The motor nerve endings at neuromuscular contact area composed of neurons and neuroglial cells were located between musculature and extracellular sheath of the venom gland. At the synaptic contact between a motor axon and a muscle fiber in the musculature, spherical synaptic vesicles were prominent in the nerve terminal. The sarcoplasm beneath the neuromuscular synapse has a granular appearance and lacks myofilaments. And the main axon gives off a branch between the muscle fibers. The synaptic regions of this organ are located close to the myofilaments unlike to other chelicerate classes. Moreover the postsynaptic complex of vesicles and membrane invaginations present in other synaptic regions are absent from these regions in this venomous organ. VL - 39 SN - 0440-2510 UR - ://ZOOREC:ZOOR13300031593 N1 - ZOOR13300031593Serial Number 133 ER -