Agelenids of the World

Systematics and Taxonomy of Agelenidae, a Worldwide distributed Spider Family

Observations on the morphology and histochemistry of the foregut muscles of spiders (Arachnida: Araneida)

Publication Type:Journal Article
Year of Publication:1981
Authors:W. Meyer
Journal:Journal of Morphology
Date Published:1981
ISBN Number:0362-2525
Keywords:/ / histochemistry & morphology] [Muscle arrangement and gross muscle, anatomy / / ] [Digestive system / / ]., Araneae (Arachnida)., Araneae [Biochemistry / / Histochemistry, Biochemistry, Digestive system, foregut muscles] [Musculature, Musculature

The morphology of the foregut muscles of 5 spider families (Theraphosidae, Agelenidae, Araneidae, Lycosidae, Salticidae) was described, and the individual fiber numbers and fiber cross diameters of the muscles were determined. The nomenclature of these muscles was reviewed and modified if necessary. Oxidative enzyme and myosin-ATPase histochemistry revealed 8 dilatatory muscles of the foregut to consist of slow (type I) fibers, fast fibers (type IIB) and intermediate fibers, were only found in the 2 other muscles of the foregut, and in the remaining prosomal muscles (type IIA fibers around the poison gland). The 8 sucking muscles proper of the foregut also showed stronger activities of transmitter metabolizing enzymes [monoamine oxidase, glutamate dehydrogenase (NAD)], and comparatively distinct amounts of glycogen and lipids.

URL:<Go to ISI>://ZOOREC:ZOOR11800014951
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