ИСТИНА

The present morphological investigation has been lead on the broadbills (Eurylaimidae) from clade of the Old World suboscine passerines (species - Eurylaimus javanicus, Cymbirinchus macrorinchus, Serilophus lunatus, Psarisomus dalhousiae, Smithornis capensis). Carried out anatomic researches consist in dissection of specimen head and detail sketches of the muscles of jaw apparatus and the scull; and the functional analysis of this biomechanical components. The similar analysis of the data received during this examination has shown, that Eurylaimidae as a whole is natural group with a general plan of the structure of jaw apparatus. Birds of this family are deeply adapted for use in food of large objects. All of them have a wide bill and a wide pharynx. And also differ the weak pinnation of muscles, consisting of the big number of long muscle fibres and small number of aponeurosises. Such features of a structure provide ability to wide scope of movements of jaws. The broadbills possess ability to specific processing a food in the basis part of the bill. A number of morphological features of the structure of the tongue of broadbills is connected with this specialization, their tongues wide, fleshy and possesses enough high degree of mobility. The distinctions found within the group of Asian insectivorous broadbills divide them on two sisterly groups. In the first group there is one genus Psarisomus, the genera Eurylaimus, Cymbirinchus and Serilophus concern to other group.