SPHENOPHRYNE - American Museum of Natural History

2000 ZWEIFEL: PARTITION OF SPHENOPHRYNE
21
Fig. 9. Austrochaperina blumi, holotype,
MZB 3562, SVL 26.3 mm.
Jaya, Indonesia. This locality is on the north
slope of the central dividing range of Irian
Jaya, west of Nipsan and northeast of Anguruk.
PARATYPES: All collected by J. Paul Blum
in Jayawijaya District, Irian Jaya. AMNH
A157795, 157796, UPNG 9529–9531, 9534,
9537, same data as holotype; UPNG 9514,
9515, Bime, 1500 m, May 1975; UPNG
9546–9548, 9550 (C&S), Bime Valley, 1500
m, May 1975. See Referred Specimen, below.
ETYMOLOGY: I name this species for Dr. J.
P. Blum in recognition of his important collections
of frogs from Irian Jaya (e.g., Blum
and Menzies, 1988).
DIAGNOSIS: The following characteristics,
in combination, distinguish A. blumi from
other Austrochaperina: size moderately
small, maximum SVL about 26 mm; fingers
with moderately large terminal discs (3rd finger
disc/SVL 0.031–0.040), only that of the
first finger not broader than the penultimate
phalanx; hands moderately large (HD/SVL
0.23–0.26).
DESCRIPTION OF HOLOTYPE: Adult female
(ova 2.2 mm in diameter) with the following
measurements and proportions: SVL 26.3,
HW 9.0, TL 11.3, EY 3.05, EN 2.15, IN 2.8,
third finger disc 1.0 (penultimate phalanx
0.6), fourth toe disc 1.0 (appears slightly
shrunken; penultimate phalanx 0.6), HD 6.3,
FT 11.3; TL/SVL 0.430, HW/SVL 0.342,
EY/SVL 0.116, EN/SVL 0.082, IN/SVL
0.106, EN/IN O.768, FD/SVL 0.038, TD/
SVL 0.038, HD/SVL 0.240, FT/SVL 0.430.
Head relatively narrow; snout rounded,
verging on truncate in dorsal aspect, high,
rounded, and slightly projecting seen laterally;
nostrils lateral, barely visible from
above, widely separated but appearing close
to tip of snout in lateral view; loreal region
nearly vertical, shallowly concave, canthus
rostralis rounded. Eyes moderately large, laterally
placed and visible from beneath, EY
greater than EN, interorbital span slightly
greater than width of an eyelid. Tympanum
small and indistinct, horizontal diameter of
annulus less than one-half that of eye. Relative
lengths of fingers 4 3 2 1, first
well developed, all with rounded, grooved
terminal discs, that on first finger scarcely
broader than penultimate phalanx, others better
developed, disc on third finger about 1.7
width of penultimate phalanx; subarticular
and inner metacarpal elevations low, rounded,
inconspicuous (fig. 56F). Toes unwebbed,
relative lengths 4 3 5 2 1, all with
rounded, grooved terminal discs, that on first
toe scarcely broader than penultimate phalanx,
others better developed, disc on fourth
toe about 1.7 width of penultimate phalanx
and equal to disc on third finger but apparently
a bit dried and shrunken; subarticular
elevations low and rounded, slightly more
evident than those on fingers, a low, rounded,
elongate inner metatarsal tubercle, no outer
(fig. 56F). Dorsal surface of body nearly
smooth, a slightly raised midvertebral line
and a shallow fold from posterior corner of
eye across upper edge of tympanum to forelimb
insertion, no other conspicuous folds on
dorsum; venter smooth.
The dorsal surfaces of head, body, and
limbs are pale tan with numerous small,
somewhat darker, irregular spots. The end of
the snout and the upper loreal region are
darker than the dorsal ground color, and there
is a hint of this darker color on the postocular
fold. The lips are pale with darker spotting.
The groin and anterior and upper posterior
surfaces of the thighs are dusky. The lower
posterior surfaces of the thighs are colored