Abdomen

Abdomen

The abdomen of aphids can be glossy, matt or covered with a variously abundant waxy secretion. It can be elongate, round, tapering or flattened.

In alates, the abdomen is clearly differentiated from the thorax. It is made of 10 segments, more or less well marked.
The last segment forms the cauda. The junction between segments V and VI is where cornicles are carried.
The end of the ventral side bears the genital plate and the anal plate.

The shape of the abdomen varies with the different species.

 Hyalopteroides humilis
 (elongate)

 Brachycaudus cardui
 (round)

 Macrosiphum euphorbiae
(tapering)

 Crypturaphis grassii
 (flattened)

    

Aphids are often green, yet they can be seen in a whole range of colours.
Some species even produce clones that differ in colour (green or pink in Acyrthosiphon pisum,  green or orangey in Sitobion avenae, Macrosiphum euphorbiae for example).

Myzus ascalonicus
(light green)

Aphis nasturtii
(yellow)

Neotoxoptera formosana
(black)

Dysaphis pyri
(purple)

Uroleucon tanaceti
(reddish brown)

Acyrthosiphon pisum
(pink and green colony)

Modification date : 07 February 2023 | Publication date : 23 November 2010 | Redactor : Evelyne Turpeau, Maurice Hullé, Bernard Chaubet