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Bembidion stenoderum Bates 1873

David R. Maddison
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Containing group: Bembidion (Bracteon)

Adult External Characteristics

This distinctive species is small and narrow, with a fusiform body. The sides of the prothorax are rather straight; the pronotum is wide posteriorly. The midlateral pronotal seta is absent. The surface of Japanese specimens is shiny (mainland specimens are duller). Mirrors are present on intervals 3 through 5, and in most specimens with faint mirrors on intervals 6 and 7. Setae ed3 and ed5 are in a large pit. Humeral margin of the elytral is long, extended to stria 5; the elytral striae are deeply engraved. There are generally with two setae in ed7 area.

Male Genitalia

Aedeagus slender, with straight basal portion and ventrally bent apex. The sclerite complexes are unusually small, and are far removed from basal orifice. Right lobe of CSC ridged.

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Left: Lateral view. Right: Central Sclerite Complex

Comparison with Related Species

The fusiform shape, deeply engraved striae, and other characters mentioned above are distinctive; specimens are not likely to be misidentified.

Geographic Variation

The larger, duller specimens from the mainland are considered a distinct subspecies (B. s. mukdensis) by Kirschenhofer (1984).

Geographic Distribution

Found in Japan and the neighboring mainland.

Nomenclature

Other Names for Bembidion stenoderum Bates 1873

Title Illustrations
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Scientific Name Bembidion stenoderum
Location Japan: Kyoto
Sex Female
Image Use creative commons This media file is licensed under the Creative Commons Attribution License - Version 3.0.
Copyright © 1995 David R. Maddison
About This Page

David R. Maddison
Oregon State University

Page: Tree of Life Bembidion stenoderum Bates 1873. Authored by David R. Maddison. The TEXT of this page is licensed under the Creative Commons Attribution License - Version 3.0. Note that images and other media featured on this page are each governed by their own license, and they may or may not be available for reuse. Click on an image or a media link to access the media data window, which provides the relevant licensing information. For the general terms and conditions of ToL material reuse and redistribution, please see the Tree of Life Copyright Policies.

Citing this page:

Maddison, David R. 1995. Bembidion stenoderum Bates 1873. Version 01 January 1995 (under construction). http://tolweb.org/Bembidion_stenoderum/391/1995.01.01 in The Tree of Life Web Project, http://tolweb.org/

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Bembidion stenoderum

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