Tarucus


Tarucus is a butterfly genus in the family Lycaenidae. They are commonly known as blue Pierrots or simply Pierrots. The latter name is often used for the closely related genus Castalius. The delimitation of Castalius versus Tarucus is not yet fully resolved, with some species, such as the dark Pierrot, having been moved between the two genera repeatedly. It may even be that they are eventually regarded as synonymous, and in that case the older name Castalius would supersede Tarucus by the Principle of Priority.
Several species formerly in Tarucus were moved to Leptotes, another closely related lineage.
The caterpillars of this genus typically feed on Ziziphus and are attended by ants.

Species

The genus can be divided in two distinct groups. These are generally separated geographically, but some taxa, though assigned to one group, occur in the range of the other. Consequently, it is not quite clear whether the groups are clades or merely convenient but paraphyletic assemblages:
Afrotropical group:
South Asian group:
Others:
  • Tarucus alteratus
  • ''Tarucus extricatus''