98 



Acarology 



THINOZERCONINA TRAGARDH, 1946 



The dorsal plate is divided into a large propodosomal plate and a 

 smaller posterior plate. The peritreme is dorsal in both sexes, while 

 the sternal plates are absent or weakly sclerotized in the female ex- 

 cept for well-developed jugular plates in the Thinozerconidae. The 

 epigynial plate is narrow, has one pair of setae, and is not articulated 

 to a ventral plate. The male genital opening is in the sternal plate. 



Key to the Thinozerconina 



1. Jugular plates of female well-developed; male genital opening 

 between coxae ni Thinozerconidae 



Female lacking sclerotized jugular plates; male genital opening 

 between coxae ii Dasyponyssidae 



Thinozerconidae Halbert, 1915 



Figure 69 



Diagnosis: The thinozerconids are medium-sized mites that have an 

 elongated oval shape and are somewhat pointed posteriorly. Their 

 dorsal plate is divided into two and is partially flanked by the dorsal 



Figure 69 Thinozercon michaeli Halbert, 1915. Ventral plates (right) and 

 tritosternum (left) of female. (After Tragardh 1946) 



peritremal plates. The epigynial plate is narrow and tongue-like with 

 one pair of setae posteriorly. The male genital opening is small and is 

 closed by a pair of minute semicircular plates, the first of which carries 

 a pair of stout setae. 



