Horned Talontail Puntige Knypstert
Crenigomphus cornutus (Pinhey, 1956)
Key identification features:
- Face and head above yellow with some traces of brown.
- Eyes greyish blue in front, light brown behind, with some indistinct dark horizontal stripes.
- Thorax yellow with faint brown stripes.
- Wings slightly smoky. Pterostigmas of medium length (3.5 mm), narrow,black.
- Abdomen long and narrow with dark brown narrow ring at each segmental joint, inside view each ring with a distinct dark brown dash running forwards on each of segments 3 to 7 on yellow, yellow background forming a line along sides of abdomen. Foliations absent. Segments 8 to 10 of similar length. S 10 swollen club. Superior appendages solid, curved and rounded. Curved toward each other in dorsal view, with wide space between them, straight in side view. Inferior appendages with dorsal teeth near apex, and wide notch (hooked) between very short branches. The hooked inferior appendages diagnostic
- Similar to male
- Stouter, pterostigmas slightly longer.
Compared with other species:
- Lack of foliations distinguish it from the more common Crenigomphus hartmanni
- Paragomphus . magnus has no foliage’s .
- Major differences are in the claspers with O. supinus having inferior appendages that are very fine, upwardly curved with two fine prongs when viewed from side .
- I. Ferox inferior appendages curves upwards to touch the superior appendages. P. magnus has very large superior appendages with the tips curving back to almost face S10.
- The abdominal stripes, dorsal thorax and the markings on the side of the thorax are diagnostic in the mentioned species.
- P. magnus has no foliage’s .
Distribution and habitat:
- The Horned Talontail has only been recorded in South Africa from the southern Kruger National Park
- Habitat is fast savanna rivers and streams with grassy margins. From 900 to 1400 m above sea level, but possibly down to 300.
- It flies in grassland near flowing water, frequently settling on grass stems and other prominent vegetation.
Further reading and other information:
M J Samways & John P. Simaika. Manual of FreshwaterAssessment for South Africa:Dragonfly Biotic Index