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Science 26 April 1968:
Vol. 160. no. 3826, pp. 423 - 425
DOI: 10.1126/science.160.3826.423
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Articles

Flea Ctenophthalmus: Heterogeneous Hexagonally Organized Layer in the Midgut

A. Glenn Richards 1 and Patricia A. Richards 1

1 Department of Entomology, Fisheries, and Wildlife, University of Minnesota, St. Paul 55101

The ventriculus or midgut of adult fleas of the genus Ctenophthalmus (Hystricopsyllidae) is surrounded by a complex investment consisting of a "beaded layer," circumferential and longitudinal muscles, minute fibrils of the sort commonly called collagenous, and a granular layer at the boundary of the hemocoel. The beaded layer is remarkable in consisting of two types of short cylinders of greatly different diameters, each type arranged in a mixed hexagonal array.


THIS ARTICLE HAS BEEN CITED BY OTHER ARTICLES:
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Science. ISSN 0036-8075 (print), 1095-9203 (online)