Morphology-based cyber identification engine to identify ants of the Tetramorium caespitum/impurum complex (Hymenoptera: Formicidae)

We present a morphology-based identification engine for ants of the Tetramorium caespitum/impurum complex, em- bedded in the world wide web. Using classificatory discriminant analysis the facility allows one to discriminate wor- kers of nine very similar species, namely T. caespitum (LINNAEUS, 1758), T. impurum (FOERSTER, 1850), T. hungari- cum RÖSZLER, 1935, T. tsushimae EMERY, 1925, and T. spp. A - E. Identification requires 21 characters, captured with high-precision morphometry. The identification engine includes verbal and graphic character definitions as well as an entry mask for morphometric data. Upon data entry, probability values for the sample's membership to each of the nine species are returned. We recommend users to apply and put on record a probability cut-off.