PIETSCH: OSTEOLOGY AND RELATIONSHIPS OF TETRABRACHIUM 



^12 th pre-ural 

 centrum 



Figure 34. — Lophichthys boschmai, UW 20773. 47 mm SL: A. Preural centra 12 through 16, showing partially ossified connection 

 between distal tips of haemal spines of preural centra 14 through 16; B. Caudal skeleton showing remnant of epural. 



A single epural is present in Antennarius, 

 Chaunax, and Dibranchus (Figures 33, 35) (oval 

 and laterally compressed in the later genus). In 

 the larger (47 mm) of the two specimens of 

 Lophichthys (Figure 34B) examined, the epural is 

 represented by a tiny circular ossification. No 

 trace of this element is present in the smaller (44 



mm) individual of Lophichthys, or in any other 

 antennarioid examined. 



Axial skeletal elements of the antennarioid 

 taxa examined are compared in Table 2. 



Medial fins and illicial apparatus (Figures 13, 36- 

 39). — The spinous dorsal fin of Tetrabrachium , 



.<Ua- 



c^ 



ff^ 



FIGURE 35.— Vertebrae, caudal skeleton, and median fins: A. Chaunax pictus, UW 20770, 90 mm SL; B. Dibranchus atlanticus, MCZ 



51257, 105 mm SL. 



409 



