A taxonomic review of the genus Euboeus Boieldieu, 1865 (Coleoptera: Tenebrionidae: Helopini) of the Caucasus, Iran and Turkmenistan Author Nabozhenko, Maxim V. text Zootaxa 2022 2022-07-01 5159 4 451 486 journal article 88477 10.11646/zootaxa.5159.4.1 cffc486a-265f-4d35-a289-a4a54845c77d 1175-5326 6785909 CA6AF6AD-9E4A-4BE3-8B52-6D8E5EA3641F Key to species of the genus Euboeus of the Caucasus, Iran and Turkmenistan , on males 1 Pronotum and head dark-bluish or dark-violet, elytra black ( Figs 19A , 20A, B )........................ E. chorasanicus - Body dorsally completely black or sometimes black-brown................................................... 2 2 Puncturation of head and pronotum coarse and dense, punctures subequal or larger than interpuncture distance (sometimes punctures coarse but slightly sparser at middle of pronotum) ( Figs 1A , 2E, F , 4F, G , 5D, E , 6A , 7F, G ). Male body dull dorsally ( Figs 1A , 2A , 3A , 4A , 5A , 7A ) or rarely shiny ( Fig. 7A )...................................................... 3 - Puncturation of head and pronotum fine and sparse, puncture diameter much lesser than interpuncture distance, at least at middle and anterior third ( Figs 9D, E , 10A, B , 11E, F , 12D, E , 13E, F , 14D, E , 15D, E , 17D, E ). Male body more or less shiny dorsally (8A, 9A, 10A, 11A, 12A, 13A, 14A, 15A, 17A, 18A)................................................. 7 3 Pronotum with very coarse and dense puncturation of longitudinal elongated punctures, especially on lateral sides of disc; Median smooth line of pronotum elevated near base and separated from other surface by impression with very dense merged punctures ( Figs 1A , 2E, F ).................................................................. E. corrugosus - Pronotum with coarse and dense puncturation of simple round, not merged punctures; median line not elevated near base or absent ( Figs 4F, G , 5D, E , 6A , 7F, G )..................................................................... 4 4 Head densely pubescent with recumbent reddish setae ( Figs 6A–D ). Pro- and mesotarsi slightly widened, much narrower than apex of protibia ( Fig. 6A )....................................................................... E. vicinus - Head bare, only with very short simple seta in each puncture ( Figs 4G , 5E , 7G ). Pro- and mesotarsi stronger widened, equal or wider than width of apex of protibia ( Figs 4A , 5A , 7A )....................................................... 5 5 Metaventrite and abdominal ventrites pubescent with long recumbent hairs ( Fig. 4C, D ). Pronotum very narrow P w P l = 1.13 ( Fig. 4F )................................................................................. E. gorganicus - Metaventrite and abdominal ventrites bare, covered with simple very short setae ( Figs 5B , 7C, D ). Pronotum wider, P w P l = 1.16–1.28 ( Figs 5D , 7F )............................................................................... 6 6 Pronotum much wider (P w P l = 1.28), with lateral strongly emarginated at basal quarter ( Fig. 5D ). Abdominal ventrite 5 with double puncturation: large sparse punctures among fine dense puncturation ( Fig. 5B ). Pro- and mesotarsi more elongate, pro- and mesotarsomere 1 longitudinal, pro- and mesotarsomere 2 with subequal length and width ( Fig. 5A )..... E. prometheus - Pronotum narrower (P w P l = 1.16), with lateral margins straight or weakly rounded at base ( Fig. 7D ). Abdominal ventrite 5 with simple fine and sparse puncturation ( Fig 7B ). Pro- and mesotarsi wider, pro- and mesotarsomeres 1 and 2 transverse ( Fig. 7A ).......................................................................................... E. zoroaster 7 Head pubescent with long recumbent setae ( Fig. 18E ). Pronotum with projected, acute, pointed at apex antero-lateral corners ( Fig. 18D ). Prothoracic hypomera with sparse distinct granules ( Fig. 18F )................................. E. zubovi - Head bare ( Figs 8F , 9E , 11F , 12E , 13F , 14E , 15E , 17E ). Antero-lateral angles of pronotum not projected, right or obtuse ( Figs 8E , 9D , 11E , 12D , 13E , 14D , 15D , 17D ). Prothoracic hypomera with wrinkles and punctures, separately or together, but without sparse granules ( Figs 8G , 9F , 11G , 12F , 13G , 14F , 15F , 17F )................................................ 8 8 Lateral margins of pronotum not completely beaded, bead widely interrupted at middle ( Figs 17D, E ). Apical piece of aedeagus subquadrate at apex or apex strongly emarginated at middle ( Fig. 17K )............................... E. quadricollis - Lateral margins of pronotum completely beaded ( Figs 9E, F , 11E, F , 13E, F ) or completely not beaded ( Figs 14D, E , 15D, E ). Apical piece of aedeagus round at apex ( Figs 8D , 9K , 11M , 12K , 13M , 14K , 15K )................................. 9 9 Lateral margins of pronotum completely beaded ( Figs 9E, F , 11E, F , 13E, F )..................................... 10 - Lateral margins of pronotum not beaded ( Figs 8E, F , 12D, E , 14D, E , 15D, E ).................................... 12 10 Pronotum widest ahead of middle ( Fig. 9D ). Prothoracic hypomera not flattened along margin, with small confused microwrinkles with poorly distinguished sparse smoothed puncturation against their background; wrinkles with microgranulation at anterior third ( Fig. 9F ). Apical piece of aedeagus with longitudinal median keel ( Fig. 9K ). Apical part of the basal piece of aedeagus smooth, without longitudinal rugosity ( Fig. 9K ).............................................. E. grimmi - Pronotum widest at middle ( Figs 11E , 13E ). Prothoracic hypomera narrowly ( Fig. 13G ) or widely ( Fig. 11G ) flattened along margin, coarsely and densely punctured ( Fig. 13G ) or coarsely longitudinally wrinkled ( Fig. 11G ), without microgranulation. Apical piece of aedeagus with longitudinal median groove or wide impression ( Figs 11M , 13M )..................... 11 11 ody dorsally strongly shiny, especially pronotum with lacquer gloss ( Figs 10B , 11E, F ). Prothoracic hypomera with coarse longitudinal wrinkles; lateral margin of prothoracic hypomera clearly widely flattened ( Fig. 11G ). Metatibiae strongly bent ( Fig. 11C ). Lateral margins of apical piece of aedeagus weakly rounded ( Fig. 11M )........................... E. huedepohli - Body dorsally lesser shiny, pronotum without lacquer gloss ( Figs 13E, F ). Prothoracic hypomera with coarse puncturation and smooth wrinkles at middle; lateral margin of prothoracic hypomera very narrowly weakly flattened ( Fig. 13G ). Metatibiae very weakly bent ( Fig. 13B ). Lateral margins of apical piece of aedeagus straight in apical half ( Fig. 13M )......... E. kasatkini 12 Prothoracic hypomera with large and coarse longitudinal smooth wrinkles ( Fig. 12F ). Pronotum with strongly rounded lateral margins at middle ( Fig. 12D )................................................................. E. kalashiani - Prothoracic hypomera punctured or with punctation and microwrinkles ( Figs 8G , 14F , 15F ). Lateral margins of pronotum weakly rounded..................................................................................... 13 13 Prothoracic hypomera with dense uneven small uneven wrinkles and small sparse punctures on their background ( Fig. 8G )............................................................................................ E. arzanovi - Prothoracic hypomera with large coarse foveolate punctures, without microwrinkles ( Figs 14F , 15F ).................. 14 14 Eyes strongly convex (lateral margin angulate in dorsal view) ( Figs 14B, D ). Pronotum wider (P w P l = 1.3), widest ahead of the middle, with moderately rounded lateral margins ( Fig. 14D ). Base of flex side of meso- and metafemora with dense brush of setae ( Fig. 14B ). Abdominal ventrites bare, with only simple very short setae ( Fig. 14B )................ E. krivokhatskyi - Eyes moderately convex (lateral margin rounded in dorsal view) ( Figs 15B, D ). Pronotum narrow, almost with subequal width and length (P w P l = 1.08), widest at middle, with very weakly rounded lateral margins ( Fig. 15D ). Base of flex side of meso- and metafemora with simple recumbent setae, without separate dense brush ( Fig. 15B ).......................... E. merkli