Phratora tibialis

This small (3.7–5 mm) beetle is similar and size and coloration to other species of Phratora. Adults are typically metallic blue or green. In Europe, it is most likely to co-occur on Salix host species with Phratora vitellinae. It is somewhat narrower in body shape than P. vitellinae. This beetle is very similar in morphology and behavior to the Nordic species Phratora polaris, as noted by Palmen, Steinhausen, Sundholm, and Köpf et al. (1996). For example, the female genitalia of P. tibialis, (which can be examined with live beetles when moderate pressure is applied to the abdomen under the dissecting scope), closely resemble those of P. polaris.

Eggs are typically laid in clutches of 8-16, arranged in rows on the underside of the host leaf. Like other Phratora species, eggs are partially covered with a crusty secretion. Larvae feed in groups in early instars (molts). Larvae show little variation in color pattern, in contrast to some other Phratora species.

Phratora tibialis has a widespread distribution in Europe. It is known from the Netherlands, Germany, Poland, Latvia Spain, Slovakia, Serbia and Bosnia, and Bulgaria. Populations occur at high elevations in parts of central Europe. It is also known from Iran and the Caucasus.

Like other Phratora species, P. tibialis can undergo multiple generations within a growing season. It probably shares the same natural enemies, which are described in more detail for Phratora vitellinae and Phratora laticollis.