extinct genus ants described members genus subfamily family known middle early fossils found europe genus currently contains described species specimens collected studied austrian originally placed fossils genera fossils reviewed subsequently placed genus ants small measuring length characterized shaped head oval compound eyes located slightly rear known present distribution individuals species found different middle early amber deposits europe baltic amber approximately million years old having deposited stage debate plant family amber produced evidence supporting relatives amber recovered deposits region ukraine slightly younger age dated late amber recovered coal deposits area germany dating deposits uncertain represents section amber recovered region thought older sediments fossil record baltic amber insects similar number shared species similarity noted suggestions single source produced amber amber deposits danish coast referred scandinavian amber similar age european study fauna indicates scandinavian amber fairly distinct identified european described baltic fossils known fossils single amber fossil known baltic amber amber fossil history classification type specimens collected described amber collection fossils initially studied austrian placed species genus considered junior synonym living genus type descriptions new species published journal collected described amber collection fossils studied american type description published journal der moved small related genus paper ants suggested species newly named better placed genus noted abundant species baltic amber studied based placement placement genus reviewed split review split restricted genus group species match definition genus moved genera time kept citing lack specimens study transferred genus retained reviewed fossils study based number characters moved species reviewed time species examined russian came conclusion species unnamed species distinct based differences noted erected new genus ants described new species combination russian word translated meaning amber greek means noted new species derived latin word spelling meaning intermediate chose honor work description genus characterized workers head shape widening rear capsule oval compound eyes generally placed slightly rear lacking completely number teeth margin middle area overall triangular shape flat cover flat fourth abdominal overall distinguished ways individuals overall form convex appearance specimens sensory organs body antennae segment antenna passes edge head capsule female male workers larger rounded compound eyes workers antennae overall longer workers males workers males distinguished slightly protruding second segment tip segment overall distinguished related baltic amber species ways individuals overall form convex appearance specimens border middle referred species noted unlike modern larvae spin eyes placed sides head capsule seen species shape species soils surface scientists suggest ants inhabited trees dwelling inside dead plant material branches specimen millimetres cracks surrounding areas white mold abdominal segment deep connection segment wide covered angular appearance rounded corner viewed separates species legs generally free hairs head sparse hairs upper surface different numerous erect hairs body legs high conical extend edge head capsule right antennae type specimen preserved head worker near tip fought prior workers range length approximately look similar workers species abdominal segment broader shallower seen unlike species abdominal segments surface smooth distinguished hairs found workers body abundant erect hair covering entire body underside head capsule eye margins leg contrast workers smooth eye margins legs sparse scattering hairs segments abdomen upper head specimens total body length millimetres antennae possess segments curves base narrower profile head capsule reaching widest broad flattened notably broad short having high rounded point upper specimens fine coarse small spots head overall coloration black specimens reddish tone legs antennae
Yantaromyrmex