Stephanidae Leach 1815
Creators: name: Engel, Michael
name: Ortega-Blanco, Jaime
Publisher: name: Zenodo
Year: 2008
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Hymenoptera
Stephanidae

description: Revised key to Baltic Amber Stephanidae 1 First metasomal tergum and sternum fused laterally to form distinct petiole (<i>Denaeostephanus</i> Engel &amp; Grimaldi)..........................................................2 – First metasomal tergum and sternum not fused, separated by small membranous area (“pseudo-petiole”) (<i>Electrostephanus</i> Brues).................................. 3 2 Metafemur with two principal teeth, one near midlength and one near apical quarter............................................................ <i>D</i>. <i>sulcatus</i> (Aguiar &amp; Janzen) – Metafemur with three principal teeth, one near proximal quarter, one near midlength, and one near apex...................................... <i>D</i>. <i>tridentatus</i> (Brues) 3 Forewing vein Rs+M b absent or scarcely present; bullae absent...................4 – Forewing vein Rs+M b distinctly present; bullae present....................................................................................................... <i>E</i>. <i>neovenatus</i> Aguiar &amp; Janzen 4 Forewing 2Cu a and 2Cu b absent or nebulous; Rs+M b absent or scarcely present; pseudo-petiole short, one-half mesosomal length or less; gaster relatively robust, distinctly thicker than pseudo-petiole; metafemur with two principal teeth, one near midlength, one near apex; antenna with fewer than 20 articles; smaller species, males 4–7.1 mm in length................................5 – Forewing 2Cu a and 2Cu b present and tubular; Rs+M b absent; petiole elongate, nearly as long as mesosoma; gaster slender, tapering gradually from pseudopetiole to apex; metafemur with three principal teeth, one proximally, one near midlength, one near apex; antenna with 23 articles; larger species, males 9.0–10.0 mm in length (subgenus <i>Electrostephanodes</i> <b>n. subgen.</b>).......................................................................................................... <i>E</i>. <i>petiolatus</i> Brues 5 Male antenna with 14 articles; second through fourth flagellar articles each widened apically and about three times longer than wide; forewing Rs+M b scarcely present (exceedingly short), 2Cu a and 2Cu b nebulous; moderatesized species, males 6.0– 7.1 mm in length........................... <i>E</i>. <i>janzeni</i> Engel – Male antenna with 17 articles; second and third flagellar articles each widened apically and 2.5 times longer than wide, fourth flagellar article not widened apically and three times longer than wide; forewing Rs+M b, 2Cu a, and 2Cu b absent; smaller species, male 4.2 mm in length............... <i>E</i>. <i>brevicornis</i> Brues
description: Published as part of <i>Engel, Michael &amp; Ortega-Blanco, Jaime, 2008, The fossil crown wasp Electrostephanus petiolatus Brues in Baltic Amber (Hymenoptera, Stephanidae): designation of a neotype, revised classification, and a key to amber Stephanidae, pp. 55-64 in ZooKeys 4 (4)</i> on page 62, DOI: 10.3897/zookeys.4.49, http://zenodo.org/record/576424