Ancistrocerus longispinosus is a species of potter wasp, belonging to the family Vespidae, subfamily Eumeninae.

The Latin genus name Ancistrocerus means hooked horn.

Subspecies include: [1][2] This species is present in Southern Europe (Albania, Balearic Islands, Croatia, Cyprus, Dodecanese Islands, European Turkey, France, Greece, Italy, Portugal, Spain and Ukraine), in the Near East and in North Africa.

[4] These nonpetiolate eumenine wasps has a transverse ridge at the bending summit of the first metasomal tergum and a low and opaque propodeal lamella completely fused to the submarginal carina.

The second sternite is more or less concave at the base, the propodeum is black and the wings are darkened at the apex.