

Subfamily LONGIDORINAR Thome, 193? 

 (Key to the genera modified from Thorne, 1939) 



1. Labial region prominently set off as anterior, narrow discoid region 



and posterior wider labial region Xiohinemella Loos, 1950 ?.J33 



Labial region not prominently set off and not clearly subdivided into 

 anterior and posterior labial lobes ........ ... 2 



2. Spear extensions flanged ...... ^ .... , Xiphinema Cobb, 1913 P'l3^jl35 



Spear extensions not flanged .......... ', I \ '. T .... 3 



3. Body short, plump, a = less than 25 Longidorella Thorne, 1939 P. 133 



Body elongated, slender, a = near 50 or more 



. . ......... . Longidorus Micoletzky, 1922 P. 137 



Genus Xiphinemella Loos, 1950 

 (Key to the species) 



1. Spear 82-93u; supplements 3 omatum Loos, 1950 



Spear 72-75uj supplements 8 or 9 esseri Chitwood, 1957 



Genus Longidorella Thorne, 1939 

 (Key to the species modified from Thome, 1939) 



1. Tail conoid, subacute or subdigitate . , 2 



Tail blunt, rounded U 



2. Tail conoid, subacute slightly arcuate , parva Thorne, 1939 



Tail conoid subdigitate 3 



3. Length of enlarged basal portion of esophagus two times neck diameter 



macramphis (Altherr, 195o) Altherr, 1950 



Length of enlarged basal portion of esophagus three times neck 

 diameter , murithi Altherr, 1950 



U. Lip region continuous .... chappuisi (Schneider, 1935) Thome, 1939 

 Lip region set off by constriction 

 pygmaea (Steiner, 1911;) Thome, 1939 



