Elephantomyia (Elephantomyia) baltica is known from the holotype specimen, collection number 282, a solitary complete adult which has been preserved as an inclusion in transparent Baltic amber. As of 2015, the amber specimen, number 282, was included in the collections of the University of Göttingen. Baltic amber is recovered from fossil bearing rocks in the Baltic Sea region of Europe. Estimates of the age date between 37 million years old, for the youngest sediments and 48 million years old. This age range straddles the middle Eocene, ranging from near the beginning of the Lutetian to the beginning of the Pribonian. E. baltica is one of six crane fly species in the genus Elephantomyia described from the Baltic amber, the others being E. brevipalpa, E. bozenae, E. irinae, E. longirostris, and E. pulchella. All six species are placed into the Elephantomyia subgenus Elephantomyia based on the lack of tibial spurs and by several aspects of the wing morphology.
