SPHENOPHRYNE - American Museum of Natural History

40 BULLETIN AMERICAN MUSEUM OF NATURAL HISTORY NO. 253
could be desired: SVL 21.3, TL 10.1, HW
8.2, EY 2.9, IN 2.5, EN 1.7, TY 1.2, FD
0.67, TD 1.0.
This description is based on FMNH
100117, an adult male (vocal slits present)
syntype of punctata. SVL 29.7, HW 9.75, TL
14.l, EY 3.9, EN 2.2, IN 3.15, HD 7.3, FT
13.6, third finger disc 1.25 (penultimate phalanx
0.6), fourth toe disc 1.35 (0.7); HW/
SVL 0.328, TL/SVL 0.475, EY/SVL 0.131,
EN/SVL 0.074, IN/SVL 0.106, EN/IN 0.698,
HD/SVL 0.246, FT/SVL 0.458, FD/SVL
0.042, TD/SVL 0.045.
Head narrower than body; snout bluntly
pointed, slightly projecting, loreal region
steep, slightly concave; canthus rostralis obvious
but rounded; nostrils lateral, barely visible
from above, closer to tip of snout than
to eye. Eyes large, eyelid about 86% of interorbital
distance; tympanum small and indistinct.
Relative lengths of fingers 3 4
2 1, first about half length of second, all
with broadened, rounded discs, that on third
finger slightly more than 2 penultimate
phalanx width; subarticular and metatarsal
elevations low, rounded, scarcely evident.
Toes with a trace of webbing, relative lengths
4 3 5 2 1, all with well-developed,
rounded discs, that on fourth toe broader than
disc of third finger; subarticular elevations
low and indistinct, inner metatarsal elevation
low and elongate, scarcely visible. Skin
smooth above and below, some slight wartiness
on side of body and upper surface of
shank. Other specimens do not vary significantly
from this description.
COLOR AND PATTERN: The syntypes of
punctata are faded with little or no pattern
discernable. Van Kampen (1913: 464) described
them as brownish or gray, the back
with dark rounded flecks or marbling, loreal
region and upper half of temporal region
mostly dark, extremities with indistinct dark
crossbands or flecked, lower surfaces light,
with gray or brown marbling on the throat
and limbs. One of the four specimens from
Timeka has a gray dorsal ground color with
sharply defined, dark vermiform markings on
head and body; on the upper surfaces of the
legs these coalesce to form a reticulum. The
loreal region is dark, the upper lip light spotted,
and there is a dark postocular, supratympanic
streak. The groinand anterior and posterior
of thigh are pale with darker spots
more evident on the posterior surface. Chin
through chest is maculated dark and light
gray, and the abdomen is pale and immaculate.
Soles and palms are dark gray. The other
three specimens have the markings much
less evident, almost indistinguishable in one.
A color transparency shows a reddish
brown dorsal ground color with dark brown
markings (fig. 31D).
Neither of the adult male specimens has a
pale snout tip.
VARIATION IN SIZE AND PROPORTIONS: In
the type series of punctata, two male specimens
(SVL 24.6 and 28.1 mm) lack vocal
slits, whereas one (SVL 29.7 mm) has them,
suggesting size at maturity of about 30 mm.
Three females in the range 23.7–28.2 mm
SVL are immature, one of 31.6 mm has 1.3
mm ova, and five at 32.4–36.5 mm are gravid,
suggesting size at maturity of about 32
mm. Among the other six specimens, the
largest are two males of 36.8 and 36.9 mm.
A male of 28.1 mm lacks vocal slits, a female
of 31.6 mm has 1.3 mm ova, and two
larger females (32.4 and 36.6 mm) are more
conspicuously gravid. Table 2 summarizes
variation in proportions; table 3 provides regression
data.