Clubbed Talontail, Crenigomphus hartmanni, Knoppiekloustert.
Clubbed Talontail, Crenigomphus hartmanni, Knoppiekloustert is fairly large, dull yellowish green and brown striped, with very distinct club with two small foliations on each side.
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Key identification features:
- Face greenish yellow with faint brownish markings,with brown bar across front of frons. Head brownish black above with yellowish green undulated ridge running across top of head, back of head brownish black. Neck brownish with greenish hind margin.
- Eyes greyish turquoise above, light grey below.
- Thorax yellowish green with narrow indistinct brown stripes.
- Wings lightly greenish smoky with distinctly yellow costa that mellows with age. Pterostigmas narrow,black, fairly long (4.0–4.5 mm), bordered in front by yellow vein.
- Abdomen with complex pattern of yellow, yellowish green and brown,with a fine sharply-defined brown patch at each segmental joint. Segment 7 mostly yellowish green with black dorsal patch in second half. Segments 8, 9 and especially segment 10 very swollen, yellowish, reddish brown and black, with small yellow and black edged foliations. Appendages are large, light brown, Superior appendages robust and curved curve downwards Inferior appendages robust and right-angled. Tips of appendages are black. This give this species a large clubbed abdomen with talon-like powerful appendages.
- Similar to male.
- Pterostigmas slightly longer (5 mm). Abdomen noticeably more thickened, segments 8 and 9 brownish but not swollen, and each bears small black-edged foliations
- Wing costal vein bright yellow
- This species is found around lakes, pools, swift open savanna streams and rivers, with tall grass and thorn bush nearby. Often faster sections with bare banks, rocks and a gravelly and/or sandy bottom
- From 200 to 1900 m above sea level, but mostly below 1400, although possibly down to sea level.
- Hunts from rock in or near rivers. Also perches conspicuously on tops of tall grass and small bushes. Sometimes found away from the water.
Compared with other species:
- Looks similar to the Horned Talontail, C. cornutus, but C. hartmanni has lighter abdomen and much larger foliations and club.
- May be misidentified when using thorax pattern and abdomen markings with Ceratogomphus pictus (Common Thorntail) and Onychogomphus supinus (Lined Claspertail)
- Common and widespread across the warm eastern and northern side of South Africa.
- Burundi; Democratic Republic of the Congo; Kenya; Malawi; Mozambique; Namibia; Republic of South Africa; Tanzania; Uganda; Zambia; Zimbabwe;
Websites of interest:
- Odonata Atlas of Africa VMU Number 664640
- African Dragonflies and Damselflies Online
- The IUCN Red List of Threatened Species
- A Visual Guide to the Damselflies and Dragonflies of South Africa