Characters;"Balticobaetisca velteni
              
              
                
               Staniczek and Bechly, 2002 [female imago]";"Balticobaetisca stuttgardia  Godunko and Krzemiński, 2009 [male imago]";"Balticobaetisca bispinata sp. nov. [male subimago]"
Measurements;;;
"Body length [mm]";8.50;9.75;6.80–7.50
"Forewings length [mm]";9.80–10.10;11.60–11.75;8.30–10.5
"Hind wings length [mm]";3.50–3.55;3.55–3.60;2.30–2.75
"Hind/Fore wings length ratio";0.35;0.31;0.26–0.28
"Forewings width/length ratio";0.42;0.44;0.42–0.44
"Hind wings width/length ratio";0.23;0.26;0.26–0.28
Head;;;
Eyes;"small, well separated";"large, contiguous medially";"large, contiguous medially or separated by narrow gap"
"Eyes [vertical bands]";absent;absent;absent
Thorax;;;
"Prosternum [prominent bispinate projection]";present;present;present
"Mesonotal suture [scutellum]";elongate;elongate;elongate
"Mesothorax [anepisternum]";"distinctly smaller than katepisternum";"distinctly smaller than katepisternum";"distinctly smaller than katepisternum"
"Mesothorax [furcasternal protuberances]";contiguous;contiguous;contiguous
Forewing;;;
"Wings [colouration]";"unicolorous, no maculation";"unicolorous, no maculation";"unicolorous, no maculation"
"Pterostigma [number of cross veins]";"at least 15, dense row";8;11–13
"Pterostigma [shape of veins]";"mainly branched";"1–2 forked, other unbranched";"simple, unbranched"
"RS furcation [respectively to vein length]";0.18;0.13;0.13
"MA furcation [respectively to vein length]";0.54;0.56;0.56–0.58
"CuP and A1 [centrally]";divergent;"nearly parallel";"nearly parallel"
"A1 [number of veins arising to basitornal margin]";8–11;5–6;6–7
"A1 [shape of veins arising to basitornal margin]";"simple and forked veins";"simple and forked veins";"simple veins"
"A1–A2 [number of cross veins]";0;3–5;4–5
"Intercalary veins between A1 and A2";6–10;1–2;absent
"Intercalary veins between A2 and A3";absent;1–2;1
"Hind wing";;;
"Wing [shape]";"nearly round";"nearly round";"nearly round"
"Costal projection [shape]";"moderately prominent; rounded";"prominent; widely rounded apically";"prominent; widely rounded apically"
"C–Sc field [number of cross veins in costal area]";5–8;4–5;"up to 12"
"C–Sc field [shape of cross veins in costal area]";simple;simple;"simple and forked"
"C–Sc field [intercalary veins]";absent;absent;present
"Free short marginal intercalaries";present;present;present
Legs;;;
"Foretarsi [shape of claws]";"dissimilar; one blunt, one pointed";"both blunt";"both blunt"
Abdomen;;;
"Mid-dorsal transverse evaluation of tergum VI";present;present;present
"Sternum IX [in female]";"without apical cleft";—;—
Paracercus;vestigial;vestigial;vestigial
"Genitalia (male)";;;
"Forceps segment I [inner projection]";—;triangular;"widely rounded"
"Forceps segment II [shape]";—;"nearly triangular";"nearly conical"
"Penis lobes [shape]";—;"blunt apically";"blunt apically"