The following families of Trichoptera have been recorded from the 

 USSR: 



Annulipalpia Mart. 

 Paleochaetoidea Lepn. 



1. Rhyacophilidae Steph. 



2. Glossosomatidae Wall. 



3. Hydroptilidae Steph. 



4. Philopotamidae Steph. 



5. Stenopsychidae Mart. 



6. Psychomyiidae Kol. 



Neochaetoidea Lepn. 



7. Ecnomidae Ulm. 



8. Polycentropodidae Ulm. 



9. Arctopsychidae Mart. 

 10. Hydropsychidae Curt. 



Integripalpia Mart. 



1. Phryganeidae Burm. 



2. Limnophilidae Kol. 



3. Goeridae Ulm. 



4. Lepidostomatidae Ulm. 



5. Brachycentridae Ulm. 



6. Calamoceratidae Ulm. 



7. Odontoceridae Wall. 



8. Molannidae Wall. 



9. Leptoceridae Leach. 



10. Beraeidae Wall. 



11. Sericostomatidae Steph. 



12. Thremmatidae Mart. 



153 The fauna of the Palearctic Region is more widely represented in the 



Trichoptera of the USSR than in other countries of Eurasia; it is represented 

 by Holarctic and Transpalearctic forms and forms with a narrow distribution, 

 e. g., Ussuri, Siberian and European species together with species of the 

 Mediterranean, Indian and Japano -Chinese subregions, which occur at the 

 borders of the USSR. 



The incomplete faunistic composition of Trichoptera in the USSR 

 compared with the world fauna is shown not so much by the absence of the 

 small tropical families as by the fact that the large subtropical and tropical 

 families and subfamilies are represented in the USSR only by a few species, 

 e. g., Hydrobiosinae are represented by 2 species; Macronematinae by 

 3 species; Calamoceratidae by 2 species; Odontoceridae by 2 species. 



The larvae of all families and most of the subfamilies in the USSR are 

 known; all or almost all the larvae of some small groups are known, but not 

 all larvae of large groups are known, sometimes only the larvae of a few 

 species of the group. 



Phy 1 og e ny 



We have discussed the phylogenetic relationships of families in the 

 preceding chapter as far as possible in connection with the morphology and 

 biology of the larvae. In the present chapter, we attempt to use these data 

 to establish a temporary phylogenetic scheme of the order. 



Neither McLachlan nor other authors discussed the phylogeny of the 

 order as a whole; none of them made a phylogenetic scheme of the order. 

 The only exception is the phylogenetic scheme of Ulmer (l912b:377) which 

 establishes remote phylogenetic relationships. Martynov discussed the 

 phylogenetic relationships and phylogeny of a number of groups (Martynov, 

 1924b:209— 224); however, as regards the phylogeny of the whole order, he 

 published only the diagram on Plate 1, which is a supplement to his phylogeny 



143 



