02454nas a2200313   4500008004100000020001400041245015400055210006900209260000900278300000900287490000800296520132100304653005001625653002501675653001501700653002501715653007401740653005901814653001201873653001301885653002301898653002101921653003701942653005401979653003602033100001602069700001402085856004102099       1991                        eng d  a0720-213X00aThe silk-producing system of Linyphia triangularis (Araneae, Linyphiidae) and some comparisons with Araneidae. Structure, histochemistry and function0 asilkproducing system of Linyphia triangularis Araneae Linyphiida  c1991  a1-170 v1113 aThe spinning apparatus of Linyphia triangularis, adult females and males, was studied with the scanning electron microscope and the main anatomical and histochemcial characteristics of the silk glands, including the epigastric apparatus of males, are presented. The epigastric glands seem to be important for the construction of sperm webs. A detailed account of the use of the different kinds of silk in web building is given. This spinning apparatus of Linyphia closely corresponds to the araneid pattern. Characteristic of linyphiid spiders is the poor development of the aciniform glands. Corresponding to the minor importance of capture threads of Linyphia, the triads (aggregate and flagelliform glands) are less developed than in Araneidae. Linyphia make much less use of the secretions of the piriform glands for connecting threads than Araneidae. Capture threads adhere to other threads of their own glue; other threads seem mostly to be bound to one another by the secretion of the minor ampullate glands whose chemical properties, in Linyphia, appear espescially adapted to this function. Neither the anatomical and histochemical data concerning the spinning apparatus nor the structure of the webs provide any indication of close relationships between Linyphiidae and Agelenidae, as was recently claimed.10a/ ] [Webs / / Structure & thread morphology].10aAnimal constructions10aAppendages10aAraneidae (Araneae).10aAraneidae [Silk glands / / Comparison with Linyphiidae] [Spinnerets /10acomparison with Araneidae] [Spinnerets / / ] [Webs / /10aEcology10afunction10aGeneral morphology10ahistochemistry &10aLinyphia triangularis (Araneae).10aLinyphia triangularis [Silk glands / / Morphology10aStructure & thread morphology].1 aPeters, H M1 aKovoor, J  u<Go to ISI>://ZOOREC:ZOOR1280006302502085nas a2200241   4500008004100000020001400041245011200055210006900167260000900236300001100245490000700256520131100263653001701574653003001591653002501621653002301646653002401669653003801693653001401731653004301745100001401788856004101802       1984                        eng d  a0008-430100aAnatomie, histologie et affinites de l'appareil sericigene des Hersilia Sav. et Aud. (Araneae: Hersiliidae)0 aAnatomie histologie et affinites de lappareil sericigene des Her  c1984  a97-1060 v623 aAlthough hersiliid spiders do not spin any webs, their silk glands, which belong to 6 types, are large and complex. Two groups of ampullate glands, one opening on the anterior spinnerets and the other on the median spinnerets, secrete 2 proteins each. About 180 pyriform glands are clearly bipartite. Over 200 type A aciniform glands opening on the median and posterior spinnerets are made up of 3 categories of secretory cells. Silk from these glands consists of 2 proteins (core and outer coat) joined together by an intermediary layer of acidic glycoprotein. All the 160 type B aciniform glands opening on the posterior spinnerets secrete a single protein. Fifty tubuliform glands opening on the median and posterior spinnerets produce 2 proteins, one of which is colored. As in Uroteinae, long posterior spinnerets and large, numerous aciniform and tubuliform glands are correlated with swathing of prey and egg-cocoon construction. In Lycosidae and Agelenidae, the ampullate glands show the same number and distribution according to the spinnerets. Anatomical and histochemical features of hersiliid aciniform and ampullate glands are close to those of some Araneoidea. Apart from peculiar characteristics, silk glands of Hersilia might represent an intermediate evolutionary stage towards Araneoidea.10aBiochemistry10abiochemistry & functional10aChemical composition10aGeneral morphology10aHersilia (Araneae).10aHersilia [Silk glands / / Anatomy10ahistology10arelationships] [Protein content / / ].1 aKovoor, J  u<Go to ISI>://ZOOREC:ZOOR12100007406