Triasacarus

Triasacarus fedelei is an extinct species of gall mite described from the Carnian of northeastern Italy. It lived as a parasite of Cheirolepidiaceae trees. The only known specimen, preserved in amber, is 0.210 mm long.^[1] Along with Ampezzoa triassica and an unnamed dipteran, it is the oldest arthropod found enclosed in amber.^[2]

Triasacarus Temporal range: Late Triassic Carnian PreꞒ Ꞓ O S D C P T J K Pg N
Scientific classification
Kingdom:	Animalia
Phylum:	Arthropoda
Subphylum:	Chelicerata
Class:	Arachnida
Genus:	†Triasacarus
Species:	†T. fedelei
Binomial name
†Triasacarus fedelei Schmidt et al., 2012

It is possible that Triasacarus induced the formation of galls on the host plant.^[1]