Table 1 Main differences between A. stylirostris, A. longispina and A. isabellae n. sp
A. stylirostris | A. longispina | A. isabellae n. sp. | |
|---|---|---|---|
Proboscis shape | Proximal part funnel shaped, wider part at the proximal border in contact with the cephalic segment | Proximal part narrow, wider part at the first basal third. | Proximal part cylindrical along the basal third of its length, this also being the widest part. |
Ratio proboscis length/width | 2.9 | 6.5 | 4.5 |
Palp articles | 9 | 8 | 9 |
Combined length of the four first palp articles | Nearer to the entire proboscis length | Shorter than half the proboscis length | Shorter than half the proboscis length |
Ratio trunk length/proboscis length | Trunk longer than proboscis | Trunk slightly longer than proboscis | Trunk slightly shorter than proboscis |
Tubercles on the anterior cephalic segment | Low rounded tubercles | Blunt rounded tubercles | Without tubercles |
Propodal armature | Two heel spines and one medial spine of similar size | Two heel spines of different sizes | Three heel spines (the proximal one shorter) |