Callulina

Loader, Simon P., Measey, John, De, Rafael O. & Malonza, Patrick K., 2009, A new brevicipitid species (Brevicipitidae: Callulina) from the fragmented forests of the Taita Hills, Kenya, Zootaxa 2123, pp. 55-68 : 65

Key to the species of Callulina

Callulina species are distinguished primarily in the field by the truncate to expanded toe- and fingertips. Parker’s ( 1934) initial distinction of breviciptid genera is based on the double condylar articulation between the urostyle and the sacral vertebra; a synapomorphy of Callulina and Spelaeophryne . Spelaeophryne and Callulina were distinguished by Parker ( 1934) on the basis of toe tip morphology.

1 a. Fingers are expanded, the finger-tip width is greater than the width of the finger at the distal subarticular tubercle.. 2

1 b. Fingers truncated, the finger-tip is not expanded beyond the width of the finger at the distal subarticular tubercle..... ............................................................................................................................................................ Callulina dawida

2 a. The ratio between the widths of Finger 3 at the level of the distal subarticle tubercle relative to the width of its toe tip is always more than ¾. The distance between the tympanum and the posterior corner of the eye is equal to or greater than the tympanum diameter ....................................................................................................... Callulina kisiwamsitu

2 b. The ratio between the widths of Finger 3 at the level of the distal subarticle tubercle relative to the width of its toe tip is less than ¾. The distance between the tympanum and the posterior corner of the eye is usually less than the tympanum diameter......................................................................................................................................... Callulina kreffti