Amblyopone silvestrii

Amblyopone silvestrii is a primitive species of ant found in Japan.[1] The species is known for larval hemolymph feeding (LHL), in which the queens stroke older larva with their antennae before piercing them with their mandibles. They then lower their mouth parts to the would and lick up the hemolymph. Then, they cease movement for several minutes before dropping one or two white infrabuccal pellets while being groomed by worker nestmates who then carry the pellets away.[2]

Amblyopone silvestrii
Amblyopone silvestrii worker
Scientific classification
Kingdom:	Animalia
Phylum:	Arthropoda
Class:	Insecta
Order:	Hymenoptera
Family:	Formicidae
Subfamily:	Amblyoponinae
Genus:	Amblyopone
Species:	A. silvestrii
Binomial name
Amblyopone silvestrii Wheeler, 1928

The queens are not the only vampires in the colony, as all adults will feed on the hemolymph of larvae, but the only source of nutrients the queen receives is the hemolymph of her brood. The brood fed upon are in their fifth instar of their larval stage, the last stage before becoming an adult ant. LHL scars often scars them, whether faintly or boldly, though it does not kill them. In higher ants, injured larvae are cannibalized. A. silvestrii, being a primitive species however, do not kill the injured larvae, unless the colony is starved. In this case, adult ants will cannibalize the most scarred larvae before the faintly scarred ones.[2]

References

1. "Amblyopone silvestrii (Wheeler 1928) - Encyclopedia of Life". eol.org. Retrieved 2020-06-27.
2. Masuko, Keiichi (September 1986). "Larval hemolymph feeding: a nondestructive parental cannibalism in the primitive ant Amblyopone silvestrii Wheeler (Hymenoptera: Formicidae)". Behavioral Ecology and Sociobiology. 19 (4): 249–255. doi:10.1007/BF00300639. ISSN 0340-5443.

A profile view of an A. silvestrii individual