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Aphididae : Calaphidinae : Calaphidini : Hannabura
 

 

Genus Hannabura

Hannabura aphids

On this page: Hannabura alnosa

Hannabura [Calaphidini]

Hannabura are rather small spindle-shaped aphids. Their antennae are much longer than the body length, with antennal segment VI much the longest, and segment IV somewhat shorter than segment V. There are no antennal tubercles, but the inner side of antennal segment I has a projection. On the frontal margin (= frons?) of the head there are numerous tubercles each of which bear a long capitate hair. The thorax and abdomen have similar hair-bearing tubercles. The legs are slender, the hind legs being much the longest. The siphunculi of the aptera are short, but distinctly longer than their basal diameter, and with an apical constriction. The siphunculi are longer on the alatae, nearly three times as long as the basal diameter. The cauda is small and rounded. The genital plate has 6 long tubercles, the middle two being the largest, each bearing a long, broad capitate hair.

The genus Hannabura is related to Calaphis, but Hannabura species have fewer hairs on the first tarsal segment.

There are only two species in the genus Hannabura, both of which feed on alder (Alnus) sppecies. Hannabura alnicola is found on several Alnus spp. in Japan, and Hannabura alnosa is found on Alnus rugosa in north-eastern North America.

 

Hannabura alnosa (Orange-bordered alder aphid)

Adult apterae of Hannabura alnosa (see two pictures below) are pale green to creamy-white with a reddish-brown/orange line along each side of the body. The antennae are almost twice as long as the body length with the terminal process more than 4.5 times as long as the base of antennal segment VI. The antennal segments are mostly dark, apart from segments I & II and the basal parts of segments III and IV. The dorsum bears 4-6 capitate hairs per segment. The legs are mostly pale, but the apical thirds of the tibiae and tarsi are dark. The siphunculi are pale, short and truncate with a marked flange (cf. Illinoia alni and Illinoia wilhelminae, which have long, tubular siphunculi which are to some extent swollen on the apical third). The body length of adult Hannabura alnosa apterae is 1.3-1.6 mm.

Both images above by permission, copyright Claude Pilon, all rights reserved.

Immature Hannabura alnosa are very pale and lack the orange side markings. Alatae (not pictured) are very pale green with antennae pigmented in a similar way to the apterae. The legs of alatae differ from those of the apterae in that the tibiae are completely dark.

Hannabura alnosa is only found on spectacled alder (Alnus rugosa =Alnus incana rugosa) where it feeds on the underside of the leaves along the midvein and other larger veins of the leaf. Pepper (1950) reports that Calaphis alnosa (=Hannabura alnosa) adhere very closely to the veins and are difficult to see. He also notes that they sometimes occur on the same leaves with Myzocallis alnifoliae (= Pterocallis alnifoliae). Sexuales occur in October and males are alate. The oviparae deposit their eggs on the bark around the same buds or other rough places as Pterocallis alnifoliae. Hannabura alnosa is only found in north-eastern North America.

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Acknowledgements

We have used the keys and species accounts of Matsumura (1917, 1919), and Pepper (1950) together with information from 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).

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References

  • Matsumura, S. (1917). A list of the Aphididae of Japan, with description of new species and genera. Journal of the College of Agr., Tohoku Imp. Univ., Sapporo 7 (6), 351-419. Full text

  • Matsumura, S. (1919). New species and genera of Callipterinae (Aphididae) of Japan. Transactions of the Sapporo Natural History Society, Hokkaido Imperial University. 7 (2), 99-115. Full text

  • Pepper, J.O. (1950). Six new aphids from Pennsylvania. Florida Entomologist 33(1), 9. Full text