TY - JOUR T1 - The silk-producing system of Linyphia triangularis (Araneae, Linyphiidae) and some comparisons with Araneidae. Structure, histochemistry and function JF - Zoomorphology (Berlin) Y1 - 1991 A1 - Peters, H. M. A1 - Kovoor, J. SP - 1 EP - 17 KW - / ] [Webs / / Structure & thread morphology]. KW - Animal constructions KW - Appendages KW - Araneidae (Araneae). KW - Araneidae [Silk glands / / Comparison with Linyphiidae] [Spinnerets / KW - comparison with Araneidae] [Spinnerets / / ] [Webs / / KW - Ecology KW - function KW - General morphology KW - histochemistry & KW - Linyphia triangularis (Araneae). KW - Linyphia triangularis [Silk glands / / Morphology KW - Structure & thread morphology]. AB - The 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. VL - 111 SN - 0720-213X UR - ://ZOOREC:ZOOR12800063025 N1 - ZOOR12800063025 ER - TY - JOUR T1 - Anatomie, histologie et affinites de l'appareil sericigene des Hersilia Sav. et Aud. (Araneae: Hersiliidae) JF - Canadian Journal of Zoology Y1 - 1984 A1 - Kovoor, J. SP - 97 EP - 106 KW - Biochemistry KW - biochemistry & functional KW - Chemical composition KW - General morphology KW - Hersilia (Araneae). KW - Hersilia [Silk glands / / Anatomy KW - histology KW - relationships] [Protein content / / ]. AB - Although 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. VL - 62 SN - 0008-4301 UR - ://ZOOREC:ZOOR12100007406 N1 - ZOOR12100007406 ER -