{{short description|Genus of beetles}} {{Speciesbox | fossil_range = {{Fossilrange|Late Eocene|Late Eocene|Upper Eocene}} | image = ZooKeys-160-073-g001 Arostropsis groehni 02.jpg | genus = Arostropsis | species = groehni | authority = Yunakov & Kirejtshuk, 2011 }}
'''''Arostropsis''''' is an extinct genus of broad-nosed weevil in the beetle family Curculionidae known from an Upper Eocene fossil found in Europe. The genus contains a single described species, '''''Arostropsis groehni'''''.<ref name="Yunakov2011">{{Cite journal |last1=Yunakov |first1=N.N. |last2=Kirejtshuk |first2=A.G. |year=2011 |title=New genus and species of broad-nosed weevils from Baltic amber and notes on fossils of the subfamily Entiminae (Coleoptera, Curculionidae) |journal= ZooKeys |issue=160 |pages = 73–96 |doi= 10.3897/zookeys.160.2108 |pmid=22303121 |pmc=3253632|doi-access=free }}</ref>
==History and classification== ''Arostropsis'' is known only from a single fossil, the holotype, specimen number "C 7968, GPIH 4516", which is housed in the fossil collection of the Geology and Palaeontology Institute and Museum, part of the University of Hamburg. The specimen is composed of a fully complete adult male broad-nosed weevil which has been preserved as an inclusion in a transparent chunk of Baltic amber.<ref name="Yunakov2011"/> Baltic amber dates to between forty and forty-five million years old<ref name="Guglielmino2011">{{Cite journal |last1= Guglielmino |first1=A. |last2=Olmi |first2=M. |year=2011 |title=Revision of fossil species of ''Deinodryinus'', with description of a new species (Hymenoptera, Dryinidae) |journal= ZooKeys |issue=130 |pages = 495–504 |doi=10.3897/zookeys.130.1326 |pmid=22259295 |pmc=3260777|doi-access=free }}</ref> and the holotype specimen was found in the Prussian Formation. The ''Arostropsis'' holotype was recovered from an amber quarry in Jantarny near the city of Kaliningrad along the Baltic Sea coast in Russia.<ref name="Yunakov2011"/> The fossil was first studied by paleoentomologists Nikolai N. Yunakov and Alexander G. Kirejtshuk, both of the Russian Academy of Sciences.<ref name="Yunakov2011"/> Yunakov and Kirejtshuk's 2011 type description of the new genus and species was published in the online journal ''ZooKeys''.<ref name="Yunakov2011"/> The genus name ''Arostropsis'' was coined by Yunakov and Kirejtshuk as a combination of two Greek words ''rōstron'' meaning "beak or snout" and ''opsis'' which means "resembling (something)" in combination with the negative prefix ''a''. The specific epithet ''groehni'' was coined in honor of Carsten Gröhn who first collected the holotype specimen.<ref name="Yunakov2011"/> ''Arostropsis'' is one of a number of broad-nosed weevils described from specimens in Baltic amber. As of the 2011 Yunakov and Kirejtshuk paper, at least eleven species had been described or suggested by paleoentomologists.<ref name="Yunakov2011"/> [[File:ZooKeys-160-073-g001 Arostropsis groehni 04.jpg|thumb|left|rostrum and mandible]]
==Description== The ''Arostropsis'' male adult has an overall coloration which appears to be metallic green and that is caused by numerous small lanceolate scales coating the legs and sides of the body. The male has an elongated body which is {{convert|6.4|mm|in}} in length, {{convert|1.3|mm|in}} tall, and with an overall width of {{convert|1.8|mm|in}}. The rostrum is approximately one and a half times as long as it is wide and is noted for being narrower than the rest of the head. Only the left mandible is still present and attached to the head and the tip section has a distinct curve and the mandible as a whole has a knife like shape.<ref name="Yunakov2011"/> The legs are elongated and with the protibiae hosting a row of slender spines. The tip of the tibia, called the corbel, is open, lacking a second row of spines. ''Arostropsis'' is distinguished from the modern genera of Naupactini that have open corbels by the narrow rostrom and morphology of the antennae.<ref name="Yunakov2011"/>
==References== {{Reflist}}
{{Taxonbar|from=Q4795596}}
Category:Entiminae Category:Eocene insects of Europe Category:Fossil taxa described in 2011 Category:Beetles of Russia Category:Baltic amber Category:Monotypic prehistoric insect genera