Craugastor brocchi (Boulenger, 1882)
© 2000 Jonathan Campbell (1 of 2)
Craugastor brocchi is one of several boldly patterned upland frogs in the Nuclear Central American uplands. Adult males of this species lack both vocal slits and nuptial pads; thus differing from C. pozo in which adult males possess vocal slits. Further, C. pozo has a more darkly pigmented belly, a complete canthal stripe, relatively small pale spots on the posterior of the thigh, and the lower surface of the shank suffused with brown pigment. Craugastor charadra varies from Craugastor. brocchi in being a smaller frog (males and females reach 37.9 and 67.0 mm, respectively, versus 41.9 and 83.3 mm), in having the posterior surface of the thigh marked with much smaller spots, in having the groin marked with relatively inconspicuous (versus bold) dark mottling, in having more toe webbing, and in having a strong (versus weak) tarsal fold.
Variation- The following proportions are for the five largest males and the eight largest females; qualitative features are based on the entire sample. In males, the head is 90-7% (average= 94%) as wide as long, the HW is 35-40% (average= 38%) of the SVL, and the HL is 39-42% (average= 40%) of the SVL. In females, the head is 101-113% (average= 105%) as wide as long, the HW is 40-46% (average= 46%) of the SVL, and the HL is 37-43% (average= 40%) of the SVL. The shank is long and slender and is 54-64% (average= 61%) of the SVL in males and females. Top of head flat in interorbital region; loreal region concave; supratympanic fold well developed, extending from posterior edge of eye but not reaching insertion of forearm; tympanum prominent, round in males, slightly oblong vertically in females; TM 76-91% (average= 87%) of EL in males, 42-50% (average= 47%) in females. The skin on the dorsum of the body and limbs is smooth with a few weak glandular ridges; the eyelids have several large tubercles; the skin on the flanks is weakly areolate; the belly and ventral surfaces of the thighs is finely wrinkled; the skin below the vent and ventral surface of the thighs is areolate; a fold extends across the chest from the axillary region; the ulnar tubercles are absent or reduced to several low, pale spots; and the heel is smooth or with a few tiny tubercles.
In life, the dorsum of the body and limbs is pale to medium brown, reddish brown, or gray-brown, usually with a few small black streaks associated with the parietal, suprascapular, and supratympanic ridges. The top of the parietal and supra-scapular ridges are sometimes reddish. An incomplete canthal stripe may be present in large females, but is usually absent in juveniles and males. A black interorbital bar is usually present. The inguinal region and usually the axillary region of adult females is cream with bold black spots or mottling. The posterior surface of the thigh is blacks with bold pale yellow spots or mottling. This pattern is boldest in adult females, less conspicuous in males, sub-adults, and juveniles. The throat is cream to charcoal gray, becoming a bright sulphur yellow or chartreuse on the belly with red posteriorly and on undersurface of the thighs. Heavy white speckling is present on the throat, chest, and flanks. The iris is bronze with black reticulations. In preservative, the ground color is pale to medium brown or pale gray. The dorsum is usually unmarked except for a few small dark spots or streaks associated with the parietal and suprascapular ridges. A dark interorbital bar is present. Dark limb bars are vaguely indicated or absent in adults. In adults, the pattern in the inguinal region and on the posterior surface of the thighs is bold, consisting of sharply contrasting dark brown or black and yellow or white markings. Pale spots on the posterior of the thigh are large and distinct. The venter is pale with dark spots which are sometimes confined to the chest, but which may be present over the belly as well (Campbell and Savage 2000).
Distribution and Habitat
Country distribution from AmphibiaWeb's database: Guatemala, Mexico
Life History, Abundance, Activity, and Special Behaviors
The duck-like quack of this frog may be heard anytime during the day or night, but seems to be most frequently heard in the late afternoon on overcast days. Females collected in late May were reported to contain large eggs (Stuart 1948).
Possible reasons for amphibian decline
General habitat alteration and loss
Campbell, J. A. and Savage, J. M. (2000). ''Taxonomic reconsideration of the Middle American frogs of the Eleutherodactulus rugulosus (Anura: Leptodactylidae): A reconnaissance of subtle nuances among frogs.'' Herpetologocal Monographs, 14, 186-292.
Stuard, L.C. (1948). ''The amphibians and reptiles of Alta Verapaz, Guatemala.'' Miscellaneous Publications Museum of Zoology, University of Michigan, 69, 1-109.
Originally submitted by: Jonathan A. Campbell and Jay M. Savage (first posted 2000-10-09)
Edited by: Kellie Whittaker (2007-11-30)
Species Account Citation: AmphibiaWeb 2007 Craugastor brocchi <https://amphibiaweb.org/species/2818> University of California, Berkeley, CA, USA. Accessed Dec 11, 2023.
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Citation: AmphibiaWeb. 2023. <https://amphibiaweb.org> University of California, Berkeley, CA, USA. Accessed 11 Dec 2023.
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