Dissection of silk glands in the Western black widow Latrodectus hesperus

The silk glands of the Western black widow Latrodectus hesperusChamberlin & Ivie, 1935 are morphologically and functionally distinct. Studies of spider silk glands often show only high magnification images of sections or drawings of glands, making differentiation of dissected glands difficult. W...

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Bibliographic Details
Published in:The Journal of arachnology 2018-04, Vol.46 (1), p.159-161
Main Authors: Chaw, R. Crystal, Hayashi, Cheryl Y.
Format: Article
Language:English
Subjects:
Black widow spider
females
Glands
Latrodectus hesperus
light microscopy
morphology
Observations
Physiological aspects
SHORT COMMUNICATION
SHORT COMMUNICATIONS
silk
silk glands
spidroins
spigot
spinneret
Structure
Theridiidae
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Summary:The silk glands of the Western black widow Latrodectus hesperusChamberlin & Ivie, 1935 are morphologically and functionally distinct. Studies of spider silk glands often show only high magnification images of sections or drawings of glands, making differentiation of dissected glands difficult. We dissect all of the gland types from L. hesperus females and show their gross morphology with light microscopy. Our micrographs portray the distinct morphologies and relative sizes of each silk gland type, consistent with prior descriptions of the silk apparatus of Latrodectus spiders. Notably, we verify the presence of two differentiated pairs of aggregate silk glands and spigots, thus resolving a discrepancy in the literature.
ISSN:0161-8202
1937-2396
DOI:10.1636/JoA-16-S-063.1