InfluentialPoints.com
Biology, images, analysis, design...
Aphids Find them How to ID ID by host
 "It has long been an axiom of mine that the little things are infinitely the most important" (Sherlock Holmes)

Aphidinae : Macrosiphini : Hyperomyzus carduellinus : spp. list
 

 

Hyperomyzus carduellinus

Asian sowthistle aphid

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

Identification & Distribution

Adult apterae of Hyperomyzus carduellinus (see first three pictures below) are pale green or yellowish-green with brown apices to segments of antennae and legs, and dark tips to the siphunculi. The head has prominent antennal tubercles, and a small median frontal tubercle. The antennae are about 0.9 times the body length, with a terminal process 4.3-5.6 times the base of segment VI. The hairs on the antennal tubercles are very short at 6-11 μm (cf. Hyperomyzus lactucae & Hyperomyzus pallidus, which have hairs on those tubercles 18-30 μm long). Secondary rhinaria are distributed 11-29 on antennal segment III, 0-16 on segment IV, and 0-9 on V. The rostrum reaches to the second pair of coxae. Hairs on tergite VIII are short at 8-19 μm long (cf. Hyperomyzus lactucae & Hyperomyzus pallidus, which have hairs on that tergite 30-50 μm in length). The siphunculi are about 1.57 times the cauda, and are markedly swollen on their distal 0.7. The cauda tapers rapidly from the base to the basal third, and then more gently to the apex; it bears 6-9 hairs. The body length of mature Hyperomyzus carduellinus apterae is 1.8-2.7 mm.

Images above by permission, copyright Sunil Joshi & Poorani, J. Aphids of Karnataka (accessed 12/2/20).

Alatae of Hyperomyzus carduellinus (not pictured) are pale green or yellow-green, generally with a more solid and compact central abdominal patch than that of Hyperomyzus lactucae. The terminal process is 4.7-6.1 times as long as the base of antennal segment VI. Secondary rhinaria are distributed 34-64 on antennal segment III, 14-31 on segment IV, and 5-13 on segment V. The siphunculi are 1.2-1.3 times as long as the cauda. The swollen part of the siphunculi is 1.2-1.5 times the diameter of the narrowest part more basally. An immature (fourth instar) alate is shown in the second picture below.

Images above by permission, copyright Sunil Joshi & Poorani, J. Aphids of Karnataka (accessed 12/2/20).

Hyperomyzus carduellinus is monoecious on a wide range of Asteraceae including Bidens, Ixeridium, Lactuca, Senecio, Sonchus, and Taraxacum. Populations are thought to be entirely anholocyclic. The species is mainly found in warm temperate and subtropical parts of the world (Africa south of the Sahara, India, Japan, Korea, south-east Asia, Australia, Fiji, Hawaii, and New Caledonia), but has also been introduced into the United States (Florida) and South America (Argentina).

 

Other aphids on the same host

Hyperomyzus carduellinus has been recorded on 1 Bidens species (Bidens pilosa).

Hyperomyzus carduellinus has been recorded on 2 Lactuca species (Lactuca sativa, Lactuca serriola).

Hyperomyzus carduellinus has been recorded on 6 Sonchus species (Sonchus arvensis, Sonchus asper, Sonchus brachyotus, Sonchus luxurians, Sonchus megalocarpus, Sonchus oleraceus).

Acknowledgements

We are very grateful to Sunil Joshi & J. Poorani, Aphids of Karnataka for permission to reproduce their images of the aphids.

We have used the species account of Theobald (1920) (as Rhopalosiphum carduellinum), along with information from Noordam (2004) and Roger Blackman & Victor Eastop in Aphids on Worlds Plants. We fully acknowledge these authors and those listed in the reference sections as the source for the (summarized) taxonomic information we have presented. Any errors in identification or 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

  • Theobald, F.V. (1920). African Aphididae - Part IV. Bulletin of Entomological Research 11, 65-72 (p.67)

  • Noordam, D. (2004). Aphids of Java. Part VI: Sixty species, six of which are newly described (Homoptera: Aphididae: Aphidinae, Lachninae, Neophyllaphidinae, Pemphiginae). Zoologische Verhandelingen 346, 85-212. (p.95)