Some new synonyms in Aphididae (Hemiptera: Sternorrhyncha)
Author
Victor
Author
Eastop, F.
Author
Blackman, Roger L.
text
Zootaxa
2005
1089
1
36
journal article
37165
10.5281/zenodo.273344
d10b9f81-9b43-4efb-a0ea-b57b6229ef1f
11755326
273344
Sitobion dorsatum
Richards 1967
to
Aulacorthum
This species was described in
Aulacorthum
but transferred to
Sitobion
by
Eastop and Hille Ris Lambers (1976)
. The dorsal cuticle is sclerotic as in
Sitobion
and the siphunculi have several rows of subapical reticulation, but these features are also found in some
Aulacorthum
. However unlike any
Sitobion
the antennal tubercles are very well developed and steepsided, and the ventral side of the head is spiculose. The karyotype (three samples collected by Chokai Chan), is 2n=12, commonly found in
Aulacorthum
, whereas most
Sitobion
have 2n=18. The alata, uncharacteristically for both genera, has a dark dorsal abdominal patch, which might indicate a closer affinity to
Neomyzus
, except that the hind tibiae are not spinulose. We conclude that this species should be returned to
Aulacorthum
, in spite of some features atypical of that genus.