SPHENOPHRYNE - American Museum of Natural History
SPHENOPHRYNE - American Museum of Natural History
SPHENOPHRYNE - American Museum of Natural History
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2000 ZWEIFEL: PARTITION OF <strong>SPHENOPHRYNE</strong><br />
13<br />
Fig. 5. Holotype <strong>of</strong> Austrochaperina aquilonia,<br />
AMNH A78186, SVL 31.0 mm.<br />
SVL 0.22–0.23); finger discs small (3rd finger<br />
disc/SVL 0.021–0.026), not or scarcely<br />
broader than penultimate phalanges; internarial<br />
span broad (IN/SVL 0.111–0.118).<br />
DESCRIPTION OF HOLOTYPE: Adult male<br />
(vocal slits present) with the following measurements<br />
and proportions (those <strong>of</strong> the paratype<br />
given in parentheses): SVL 31.0 (23.3),<br />
HW 11.2 (9.0), TL 12.7 (11.1), EY 3.4<br />
(3.15), EN 2.3 (1.6), IN 3.45 (2.75), HD 7.1<br />
(5.2), FT 13.6 (11.1), third finger disc 0.8<br />
(penultimate phalanx 0.55) (0.6, phalanx<br />
0.4), fourth toe disc 1.1 (0.6) (1.0, phalanx<br />
0.5), TY 1.7 (1.9); HW/SVL 0.361 (0.386),<br />
TL/SVL 0.410 (0.476), EY/SVL 0.110<br />
(0.135), IN/SVL 0.111 (0.118), EN/SVL<br />
0.074 (0.069), EN/IN 0.667 (0.582), HD/<br />
SVL 0.229 (0.223), FT/SVL 0.439 (0.476),<br />
FD/SVL 0.026 (0.021), TD/SVL 0.035<br />
(0.043).<br />
Body relatively slender, head as wide as<br />
body, snout bluntly pointed as seen from<br />
above, protruding slightly in lateral view; nares<br />
just visible from above; canthus rostralis<br />
evident but rounded, loreal region a steep,<br />
flat slope; eyelid slightly narrower than interorbit,<br />
tympanic ring scarcely visible. Rel-<br />
ative lengths <strong>of</strong> fingers 3 4 2 1, the<br />
first half the length <strong>of</strong> second, all with<br />
grooved terminal discs at most only slightly<br />
wider than penultimate phalanges, subarticular<br />
elevations low, rounded (fig. 55F). Relative<br />
lengths <strong>of</strong> toes 4 3 5 2 1, all<br />
with grooved terminal discs wider than the<br />
penultimate phalanges, that <strong>of</strong> the fourth toe<br />
broadest. Subarticular elevations low, rounded,<br />
the inner metatarsal elevation elongate,<br />
rounded (fig. 55F). Dorsal skin surface<br />
slightly granular; a faint, curved, postorbitalsupratympanic<br />
fold.<br />
The dorsal ground color is pale graybrown,<br />
dominated by darker brown irregular<br />
spotting and mottling. On the limbs the pattern<br />
has more the appearance <strong>of</strong> pale spotting<br />
on a dark ground. The snout and face are<br />
dark brown with a faint lighter pattern on the<br />
upper lips. The anterior and posterior surfaces<br />
<strong>of</strong> the thighs are mottled; the palms and<br />
soles are essentially unmarked. The chin and<br />
chest are brown with coarse white spotting<br />
and mottling; the abdomen is pale with faint<br />
indication <strong>of</strong> darker patterning. The undersides<br />
<strong>of</strong> the hind limbs are pale with a slight<br />
darker pattern.<br />
VARIATION IN TYPE SERIES: The paratype is<br />
an adult male (vocal slits present) whose<br />
measurements and proportions are noted<br />
above. In color and pattern it closely resembles<br />
the holotype except that the patterning<br />
is even less distinct.<br />
ILLUSTRATIONS: Hands and feet, fig. 55F.<br />
CALL: The call is unknown.<br />
COMPARISONS WITH OTHER SPECIES: Only<br />
two other species <strong>of</strong> Austrochaperina are<br />
known from the Torricelli Mountains, A. basipalmata<br />
and A. adamantina. Basally<br />
webbed toes, narrower internarial distance,<br />
and broader finger discs distinguish basipalmata<br />
from aquilonia. Austrochaperina aquilonia<br />
and A. adamantina are similar in most<br />
respects but differ strikingly in the larger finger<br />
discs <strong>of</strong> the latter (fig. 55). This does not<br />
appear to result from difference in the state<br />
<strong>of</strong> preservation, as the two aquilonia, with<br />
smaller discs, are well preserved. Confirmation<br />
<strong>of</strong> other possible differences in proportions<br />
must await additional specimens.<br />
HABITAT AND HABITS: Nothing is on record.<br />
DISTRIBUTION: Known only from the type