Eickwortapis
Eickwortapis is an extinct monotypic genus of sweat bee in the Halictidae subfamily Halictinae which contains the single species Eickwortapis dominicana. The genus name "Eickwortapis" is derived from a combination of "Eickwort" in honor of halictid systematist Dr. George Eickwort and the Latin "apis", meaning "bee". The species is named in reference to the Miocene (Burdigalian stage) Dominican amber from deposits on the island of Hispaniola which entombs the specimens. The species, averaging long, was described from two partial females and a single complete male specimen in one polished piece of amber which is housed in the Poinar Amber  Collection at the University of California, Berkeley. The male is numbered "H 10-70" and designated the holotype, while the two females are numbered "H 10-70B" and ""H 10-70C" are both designated Paratypes. The amber specimens with the three bees was first studied by Drs Charles Michener & George Poinar. They published the type description in the "Journal of the Kansas Entomological Society" volume number 69 and published in 1996. The male is well preserved in a curled position with the metasoma and the posterior surface of the propedium visible. Female paratype "H 10-70B" is mostly complete however  the majority of the head was removed during polishing of the amber, likewise the female paratype "H 10-70C" is also a partial due to the dorsum of the thorax and vertex being removed. In general "Eickwortapis" has a blackish body with an indistinct metallic coloration, possibly brassy greenish. The wing veins and stigma of the females are black while those of the male are a brown tone. The underside of the males antenna are yellowish brown with the males legs being a brownish. "Eickwortapis" is one of only five Halictidae genera which are known from the Dominican amber record , and one of three which are totally extinct. Closely related to the extinct genus "Nesagapostemon" and the living "Caenohalictus", "Eickwortapis" is placed with both in the halicted tribe Caenohalictini. It can be identified from "Nesagapostemon" and "Caenohalictus" by a group of features. The basal area of the Propodeum, not slanting in profile, is only half of the length of the vertical posterior surface in "Nesagapostemon". "Eickwortapis" has a longer basal area on the Propodeum and it does slant in profile. The living species "Caenohalictus eberhardorum" has long hairs on the eyes and denser scopa. The "Eickwortapis" holotype is the only  male halictid to have been documented from Dominican amber.