114 Acarology 



Discussion: Tragardh 1942 studied specimens of T. patavina from 

 the Berlese collection. He was unable to work out its morphology 

 satisfactorily, and therefore he does not include the family in his 1944 

 account of the Uropodina. The Trematuridae are included in this ac- 

 count, as are the three previous families proposed by Sellnick 1926, 

 as they are in Vitzthum's key work of 1941. T. patavina is of no 

 known economic or medical importance. 



Figure 85 T re mat lira patavina (Canestrini), 1885. Portion 

 of venter to show stigma and peritreme. (After Tragardh 

 1942) 



Reference: 



Tragardh, I. 1942. Uber die Trematurini Berlese (Acarina). Zool. Anz. 

 139:109-112. 



Trematurellidae Tragardh, 1944 



Figure 80 



Diagnosis: The dorsal and ventral plates are deeply sculptured. The 

 marginal plates are completely separated from the ventral plate and 

 dorsal plate by a thin membrane. The dorsal plate is undivided and 

 the marginal plate is cleft by a suture anteriorly. 



Genus: 



Trematurella Tmgkrdh, 1942 



Type. Trematurella stylifera Tragardh, 1942 



Discussion: T. stylifera is of no known economic or medical impor- 

 tance. 



Reference: 



Tragardh, I. 1942. Uber die Trematurini Berlese (Acarina). Zool. Anz. 

 139:109-112. 



