Sable Clubtail (terminal appendages)

Male and female Sable Clubtail dragonflies (Stenogomphurus rogersi) were spotted recently in Fairfax County, Virginia USA.

Male

Male dragonflies have three terminal appendages, collectively called “claspers,” that are used to grab and hold female dragonflies during mating: an upper pair of cerci (“superior appendages”); and a lower unpaired epiproct (“inferior appendage”). The epiproct for Sable Clubtail is essentially a wide plate with two prongs.

08 JUN 2018 | Fairfax County, VA | Sable Clubtail (male)

08 JUN 2018 | Fairfax County, VA | Sable Clubtail (male)

The hind wings of male clubtail dragonflies are “indented” near the body, as shown in the preceding photograph. In contrast, the hind wings of female clubtails are rounded (shown below).

Female

Female dragonflies have a pair of cerci (superior appendages) that have little or no function. The abdomen of female Sable Clubtails is noticeably thicker than males of the same species.

05 JUL 2018 | Fairfax County, VA | Sable Clubtail (female)

Copyright © 2018 Walter Sanford. All rights reserved.

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13 Responses to “Sable Clubtail (terminal appendages)”

  1. Sable Clubtail dragonfly (female) | walter sanford's photoblog Says:

    […] some of my digital photography and videography. « Last man standing Sable Clubtail (terminal appendages) […]

  2. Last man standing | walter sanford's photoblog Says:

    […] stream located in Fairfax County, Virginia USA. All individuals featured in this photo set are male, as indicated by their indented hind wings and terminal […]

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  5. Sable Clubtail dragonfly (male) | walter sanford's photoblog Says:

    […] alongside a small forested stream located in Fairfax County, Virginia USA. This individual is a male, as indicated by his “indented” hind wings and terminal […]

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    […] individual is a female, as indicated by her rounded hind wings and terminal […]

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    […] individual is a male, as indicated by his indented hind wings and terminal appendages. Notice the dragonfly is eating […]

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    […] 08 JUN 2018 | Fairfax County, VA | Sable Clubtail (male) […]

  11. Hotspot No. 2 | walter sanford's photoblog Says:

    […] No. 1 is the place where I saw my first Sable Clubtail. At least five individuals, all males, were observed by the author at this location. To date, almost all of the photos of Sable that have […]

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    […] 12 JUN 2018 | Fairfax County, VA | Sable Clubtail (male) […]

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    […] individual is a male, as indicated by his indented hind wings and terminal appendages. Some dragonflies tend to be […]

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