Figure 4.Length of the 2nd phalanx (2PL) of the 3rd digit vs. the 1st phalanx (1PL) of the 3rd digit. Several species of Glauconycteris
are shown (closed diamond), as is Niumbaha superba (open diamond), and for comparison, two species of Scotophilus
(open triangle; a ‘typical’ African vespertilionid bat). The ratio of 2PL/1PL is significantly greater in Glauconycteris
than in Niumbaha (with a theoretical 1:1 ratio indicated by the dashed line). Data as reported in Table 2.