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Schizolachnus obscurus

Waxy brown pine needle aphid

Identification & Distribution  Other aphids on the same host 

Identification & Distribution:

Schizolachnus obscurus apterae are brownish covered in greyish white wax. The last rostral segment (R5) has a long tip. R5 is more than 46 um long, and more than than 0.45 times the penultimate segment (R4). The hind tibia is dark. The body length of Schizolachnus obscurus apterae is 1.9-2.7 mm.

 

The micrographs below show an apterous adult Schizolachnus obscurus, dorsal, in alcohol - and tip of the rostrum.

 

The waxy brown pine needle aphid is mainly found on the needles of European Black Pine (Pinus nigra) although it has also been found on other Pine species within Europe. Schizolachnus obscurus is found in Europe east to Turkey and may well occur elsewhere.

 

Other aphids on same host:

Blackman & Eastop list about 170 species of aphids  as feeding on pines worldwide, and provides formal identification keys for aphids on Pinus. At least 18 of these species occur in Britain on Scots pine and/or Corsican pine, as well as on a variety of less commonly planted pines.

Of the 21 species on Corsican pine (Pinus nigra) Baker (2015)  lists 12 as occurring in Britain: Cinara acutirostris,  Cinara brauni,  Cinara pinea,  Cinara pini,  Cinara pinihabitans, Cinara schimitscheki, Eulachnus agilis,  Eulachnus brevipilosus,  Eulachnus rileyi,  Pineus pini,  Schizolachnus obscurus, and Schizolachnus pineti. 

Acknowledgements

We have made provisional 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).

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