SPHENOPHRYNE - American Museum of Natural History

2000 ZWEIFEL: PARTITION OF SPHENOPHRYNE
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Fig. 7. Distribution of Austrochaperina gracilipes (circles, shading on inset indicates total distribution),
A. adamantina (triangle), and A. aquilonia (triangle, one symbol covers three localities for these
two species).
slightly closer to tip of snout than to eye;
loreal region nearly vertical and flat, canthus
rostralis distinct but rounded. Eyes moderately
small (EY/SVL 0.103), eyelid half interorbital
distance. Tympanum scarcely visible,
less than half eye diameter. Relative
lengths of fingers 3 4 2 1, first more
than half length of second, all with expanded,
rounded, terminally grooved discs, that of
third finger about twice width of penultimate
phalanx; subarticular and metacarpal elevations
low, rounded, indistinct. Toes with basal
webs, reaching almost half length on first
toe and on inside of second; relative toe
lengths 4 3 5 2 1, first less than
half second, all with rounded, expanded, ter-
minally grooved discs broader than those on
fingers, that of fourth toe about twice width
of penultimate phalanx; subarticular tubercles
rounded, indistinct; inner metatarsal tubercle
low, rounded, elongate, no outer tubercle.
Body smooth to slightly rugose dorsally,
smooth beneath; a weak, curved postorbital-supratympanic
fold.
COLOR AND PATTERN: In preservative,
these frogs are brown above, sometimes virtually
patternless but more often with indistinct
darker spotting or mottling. A small
proportion have well-defined darker spots.
The undersides are pale tan with variably distinct
darker mottling on the chin, chest, and
hind legs. The abdomen is unmarked except