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Drepanosiphinae : Drepanosiphini : Drepanaphis keshenae
 

 

Drepanaphis keshenae

Spiked maple aphid

On this page: Identification & Distribution Life cycle Other aphids on the same host

Identification & Distribution

All adult Drepanaphis acerifoliae viviparae are winged. These alatae (see pictures below) are light brown or tan with a yellowish undertone. The body is somewhat heavily covered with a white, waxy, flocculent secretion, except around the prominent black spinal tubercles and areas around the siphunculi. The eyes are large and carmine coloured. The antennae are on prominent diverging antennal tubercles. The antennal terminal process is nearly 10 times the base of antennal segment VI. The basal 0.60-0.67 of antennal segment III bears 12-15 rather large, round, secondary rhinaria. The rostrum does not quite reach to the second pair of coxae. The fore femora are dark brown to dusky black. The wings are hyaline, and all veins, except the costa and subcosta, are broadly banded with dusky brown, especially toward the tip of each vein (cf. several Drepanaphis spp., including Drepanaphis carolinensis, Drepanaphis sabrinae and Drepanaphis knowltoni, which do not have their wing veins dark-bordered). The abdomen is light brown to yellowish olive green, sparsely clothed with fine hairs. The dorsum of tergite III bears a pair of black finger-like tubercles, united for at least half of their length, often appearing as a single tubercle. The tubercles on tergites I, II & IV are inconspicuous or absent (cf. Drepanaphis acerifoliae, which has tubercles on tergites I-IV, those on 1 to 4 all conspicuous, those on tergites I & III being long and finger-like). The siphunculi are dark, somewhat constricted at the base, and with a narrow pale flange. The cauda is yellow, short, globular on a conical base with several long hairs. The body length of Drepanaphis acerifoliae alatae is 2.0-2.5 mm.

Images above copyright Vitaly Charny under a Creative Commons 3.0 License.

Immature Drepanaphis keshenae are green or orange-green (see picture below of dispersed colony with adult alatae and immatures on leaf).

Images above copyright Vitaly Charny under a Creative Commons 3.0 License.

Drepanaphis keshenae are monoecious holocyclic on sugar maple (Acer saccharum). They feed singly on the lower side of the young leaves. Adults are quite active and often leap when foliage is only slightly disturbed. They are found in eastern USA and Ontario, Canada.

 

Other aphids on the same host

Drepanaphis keshenae has been recorded on only 1 maple species (Acer saccharum).

Acknowledgements

We are very grateful to Vitaly Charny for making his images available under a creative commons licence. We are also very grateful to Natalie Hernandez of Bugguide for discussions re identification of Drepanaphis species.

We have used the keys and species accounts of Granovsky (1931) & Smith & Dillery (1968), together with information from Roger Blackman & Victor Eastop in Aphids on Worlds Plants. We fully acknowledge these authors as the source for the (summarized) taxonomic information we have presented. Any errors in information are ours alone, and we would be very grateful for any corrections. For assistance on the terms used for aphid morphology we suggest the figure provided by Blackman & Eastop (2006).

Useful weblinks

References

  • Granovsky, A.A. (1931). Drepanaphis keshenae In: Hottes, F.C. & Frison, T.H. The plant lice, or Aphiidae, of Illinois. Bulletin of the Illinois Natural History Survey 19 246. Full text

  • Smith, C.F. & Dillery, D.G. (1968). The Genus Drepanaphis Del Guercio (Homoptera: Aphididae). Annals of the Entomological Society of America 61(1), 185-204. Abstract