References for species Hahnia difficilis Harm, 1966

Species Reference Comment Distribution
Hahnia difficilis Harm 1966: 356, f. 29-35
(PDF not available.)  (Dmf). Central Europe
Iberina difficilis Lehtinen 1967: 240
(PDF not available.)  (Tmf from Hahnia, rejected).  
Hahnia difficilis Miller 1971: 180, pl. XXX, f. 8-10
(PDF not available.)  (mf).  
Hahnia difficilis Heimer & Nentwig 1991: 370, f. 961
(PDF not available.)  (mf).  
None noted here.
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