Descriptions of New Hylid Frogs From Mexico and Central AmericaDuellman, William Edward
Science
Descriptions of New Hylid Frogs From Mexico and Central America
Duellman, William Edward
Frogs -- Central America; Frogs -- Mexico; Hylidae
_Description of holotype._--Adult male having a snout-vent length of
37.8 mm.; tibia length 20.6 mm., 54.4 per cent of snout-vent length;
foot length (measured from proximal edge of inner metatarsal tubercle)
18.6 mm., 49.2 per cent of snout-vent length; head length 11.9 mm., 31.4
per cent of snout-vent length; head width 11.4 mm., 30.1 per cent of
snout-vent length. Snout in lateral profile bluntly rounded, in dorsal
profile truncate; canthus rounded; loreal region barely concave; lips
thick, moderately flared. Snout short, distance from anterior corner of
eye to nostril equal to about three-fourths diameter of eye; nostrils
slightly protuberant, directed dorsolaterally; internarial distance 2.6
mm.; internarial area not depressed; top of head flat; interorbital
distance 3.8 mm., 33.3 per cent of width of head; width of eyelid 3.2
mm., 28.2 per cent of width of head. Eye large, protuberant, diameter
4.3 mm.; thin dermal fold extending posteriorly from posterior corner of
eye, obscuring upper edge of tympanum, curving downward to point above
insertion of arm. Tympanum distinct except dorsally, its diameter 51.1
per cent that of eye, separated from eye by distance equal to diameter
of tympanum.
Axillary membrane absent; arms moderately robust; dermal fold on outer
edge of forearm indistinct, interrupted; transverse fold on wrist weak;
fingers short, stocky; length of fingers from shortest to longest,
1-2-4-3; discs large, width of that on third finger 2.6 mm., larger than
tympanum; subarticular tubercles moderately small, flat, none distinctly
bifid; supernumerary tubercles conical, present on proximal segments;
prepollex enlarged, bearing nuptial excrescence composed of many minute
horny spinules; webbing absent between first and second fingers,
extending from middle of antepenultimate phalanx of second to base of
antepenultimate phalanx of third and beyond to base of penultimate
phalanx of fourth finger. Heels overlap by about one-third length of
tarsus when hind limbs adpressed; tibiotarsal articulation extends to
anterior corner of eye; transverse dermal fold on heel; tarsal fold
absent; inner metatarsal tubercle long, elliptical, flat, barely visible
from above; outer metatarsal tubercle small, conical; toes moderately
long, stout; length of toes from shortest to longest, 1-2-3-5-4; discs
nearly as large as those on fingers; subarticular tubercles small, flat;
supernumerary tubercles large, conical, pigmented, in single row on
proximal segments of each toe; toes about two-thirds webbed; webbing
extending from distal end of penultimate phalanx of first toe to base of
penultimate phalanx of second, from distal end of penultimate phalanx of
second to middle of antepenultimate of third, from distal end of
penultimate phalanx of third to base of penultimate of fourth to distal
end of penultimate of fifth toe.
Public-domain text, read in full here on John Shaqi.
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