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Aphidinae : Longicaudus trirhodus


Longicaudus trirhodus

Rose - columbine aphid

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

Identification & Distribution:

The aptera of Longicaudus trirhodus is pale yellowish-green with slightly darker green transverse bands across the abdomen. The third antennal segment is distinctly longer than the total length of the fourth and fifth antennal segments. The siphunculi are cone-shaped with dark tips and much shorter than the cauda. The cauda is long and finger-like much longer than its basal width. The body length of Longicaudus trirhodus apterae is 2.0-2.7 mm.

The alate (second picture above) has broad dark transverse sclerites on abdominal tergites III-VI, more or less fused into an irregular-shaped quadrate patch.

The images below show alate Longicaudus trirhodus, dorsal and ventral, in alcohol.

The clarified slide mounts below are of adult viviparous female Longicaudus trirhodus : wingless on the primary host, on the secondary host, and winged.

Micrographs of clarified mounts by permission of Roger Blackman, copyright AWP all rights reserved.

The rose - columbine aphid host alternates from rose (Rosa spp.) in winter and spring to cultivated columbine (Aquilegia vulgaris) and meadow rue (Thalictrum) in the summer. Longicaudus trirhodus is found Europe, Asia and North America.


Other aphids on same host:

Primary hosts

Longicaudus trirhodus has been recorded from 20 Rosa species.

Blackman & Eastop list about 70 species of aphid found feeding on Rosa (rose) species worldwide, and provide formal identification keys. The genus Rosa contains perhaps a hundred species, plus hybrids thereof, and thousands of cultivated varieties of 'garden' & agricultural roses. Blackman & Eastop (1984) list thirty-or-so species of aphids that feed on cultivated 'roses', worldwide (Show World list). Of those aphid species, Baker (2015) lists 12 as occurring in Britain (Show British list).

Secondary hosts


Whilst we make every effort to ensure that identifications are correct, we cannot absolutely warranty their accuracy. We have mostly made identifications from high resolution photos of living specimens, along with host plant identity. In the great majority of cases, identifications have been confirmed by microscopic examination of preserved specimens. We have used the keys and species accounts of Blackman & Eastop (1994) and Blackman & Eastop (2006) supplemented with Blackman (1974), Stroyan (1977), Stroyan (1984), Blackman & Eastop (1984), Heie (1980-1995), Dixon & Thieme (2007) and Blackman (2010). We fully acknowledge these authors 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


  • Blackman, R.L. & Eastop, V.F. (1984). Aphids on the world's crops: an identification guide. J. Wiley & Sons, Chichester, UK.